110IMX35D05D15-8G

Bel Fuse Inc.

35 Watt Quad-Output DC-DC Converter

Manufacturer: Bel Fuse Inc.

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Features

Extremely wide input voltage ranges up to 150 VDC
4 outputs up to 60 V
RoHS lead-free-solder and lead-solder-exempted products available
5 year warranty for RoHS lead-free-solder products
1500 to 1800 VAC i/o electric strength test
Electrical isolation between outputs
Programmable input undervoltage lockout
Shutdown/inhibit input
Adjustable output voltages with flexible load distribution
Frequency synchronization
Outputs no-load, overload, and short-circuit proof
Operating ambient temperature from –40 to 85 °C
Thermal protection
Low profile: 10.5 mm or 8.9 mm with open frame
Basic insulation
Flexible output possibilities between 5 V and 60 V Safety-approved to the latest edition of IEC/EN 62368-1 3rd edition and UL/CSA 60950-1 2nd edition Table of Contents 76.2 63.5 2.5" 10.5 0.41" 72.8 2.87" 47.8 1.88" 8.9 0.35" 1 70/110IMX35 models

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 2 of 16 IMX35 Series

35 Watt Quad-Output DC-DC Converter

Description

The IMX35 Series of board-mountable, 35 Watt DC-DC con verters has been designed according to the latest industry requirements and standards. The converters are particularly suitable for use in mobile or stationary applications in transport, railways, industry, or telecommunication, where variable input voltages or high transient voltages are prevalent. Covering a total input voltage range from 9 V up to 150 V with 4 different models, the converters are available with up to four electrically isolated outputs from 5 V to 60 V, externally adjustable and with flexible load distribution. A shutdown input allows remote converter on/off. Features include consistently high efficiency over the entire input voltage range, high reliability, and excellent dynamic response to load and line changes. The converters are designed and built according to the inter national safety standards IEC/EN 62368-1 3rd edition, and ap proved by Nemko. The converters provide basic insulation. The circuit is comprised of 2 planar magnetics devices, and all components are automatically assembled and securely sol dered onto a single PCB board without any wire connection. Magnetic feedback ensures maximum reliability and re peatability in the control loop over all operating conditions. Careful consi derations of possible thermal stresses ensure the absence of hot spots providing long life in environments, where temperature cycles are present. The thermal design without using any potting material allows operation at full load up to an ambient temperature of 71 °C in free air and operation up to 105 °C with airflow. For extremely high vibration environments the case has holes for screw mounting. Model Selection Table 1: Model Selection Output 1 Output 2 Output 3 Output 4 Input voltage Efficiency 1 Model Options 2 Vo nom [VDC] Io nom [mA] Vo nom [VDC] Io nom [mA] Vo nom [VDC] Io nom [mA] Vo nom [VDC] Io nom [mA] Vi min to Vi max [VDC] η min [%] ηmax [%] 1.35 1.4 1.4 1.4 1.35 1.4 1.4 1.4 1.35 1.4 1.4 1.4 1.35 1.4 1.4 1.4 9 to 36 18 to75 40 to 121 60 to 150 2 82.5 84.5 20IMX35D05D05-8G 40IMX35D05D05-8G 70IMX35D05D05-8G 110IMX35D05D05-8G non-G 0.65 0.7 0.7 0.7 0.65 0.7 0.7 0.7 0.65 0.7 0.7 0.7 0.65 0.7 0.7 0.7 9 to 36 18 to75 40 to 121 60 to 150 2 83.5 83.5 84.5 85.5 85.5 86.5 20IMX35D12D12-8G 40IMX35D12D12-8G 70IMX35D12D12-8G 110IMX35D12D12-8G 0.55 0.6 0.6 0.6 0.55 0.6 0.6 0.6 0.55 0.6 0.6 0.6 0.55 0.6 0.6 0.6 9 to 36 18 to75 40 to 121 60 to 150 2 83.5 85.5 20IMX35D15D15-8G 40IMX35D15D15-8G 70IMX35D15D15-8G 110IMX35D15D15-8G 1.35 1.4 1.4 1.4 0.65 0.7 0.7 0.7 0.65 0.7 0.7 0.7 1.35 1.4 1.4 1.4 9 to 36 18 to75 40 to 121 60 to 150 2 83.5 85.5 20IMX35D05D12-8G 40IMX35D05D12-8G 70IMX35D05D12-8G 110IMX35D05D12-8G 1.35 1.4 1.4 1.4 0.55 0.6 0.6 0.6 0.55 0.6 0.6 0.6 1.35 1.4 1.4 1.4 9 to 36 18 to75 40 to 121 60 to 150 2 83.5 83.5 85.5 85.5 20IMX35D05D15-8G 40IMX35D05D15-8G 70IMX35D05D15-8G 110IMX35D05D15-8G

1 Efficiency at TA = 25 °C, Vo nom, Io nom

2 154 V for 2 s. Product Marking Converters without option Z are marked with type designation, input and output voltages and currents, applicable safety approval and recognition marks, company logo, production date, and serial no.

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 3 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Part Number Description Input voltage range Vi Operating ambient temperature range

40 IMX35 - D05 D05 -8 i Z G

Note: The sequence of options must follow the order above ! NFND: Not for new designs. Preferred for new designs. Functional Description The IMX35 converters are comprised of 2 feedback-controlled interleaved-switching flyback powertrains using current mode control. Each converter consists of 4 electrically isolated outputs deriving from the 2 power trains. Vo1, Vo4 derive from the first powertrain and Vo2, Vo3 from the second one. Thus each pair of outputs is independent from the other one. Voltage regulation for each pair of outputs is achieved with passive transformer feedback from the main trans former of the powertrain. D12D12), all outputs may be simul taneously adjusted by the Trim input (pin 5). In case of different output voltages (e.g. D05D15), the Trim1 input influences only Vo1 and Vo4. Current limitation is provided on the primary side for each powertrain and limits the possible output power for each pair of outputs. In the case of an overload on either of the power trains, which causes the output voltage to fall to less than typically 70% of Vo nom, the entire converter shuts down and auto matically restart in short intervals (hiccup mode). The incorporated overtemperature protection shuts down the hole converter in the case of overtemperature and resumes automatically after cooling down. PWM Vi+ SD PUL 5Trim/Trim1 7Ref 2Vi– Vo4– Vo1+ Vo1– Vo4+ Vo2+ Vo2– Vo3+ Vo3– 03098b 3n.c. 19 n.c. Fig. 1 Block diagram of quad-output models

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 4 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Electrical Input Data General conditions: TA = 25 °C, unless specified Pins 8 (shutdown or i), 6 (W), 5 (Trim or Trim1), and 1 (PUL) left open-circuit (not connected), unless specified. Table 2: Input Data Model 20IMX35 40IMX35 Unit Characteristics Conditions min typ max min typ max Vi Input voltage range 1 TA min to TA max, Io = 0 to Io nom 9 2 36 18 2 75 VVi nom Nominal input voltage 20 40 Vi sur Repetitive surge voltage Abs. max input (3 s) 40 100 tstart-up Converter start-up time 2 Switch on Worst case condition at Vi min, and full load 0.25 0.5 0.25 0.5 s SD high 0.1 0.1 trise Rise time 3 Vi nom, resistive load 3 3 ms Io nom, capacitive load 6 12 6 12 Ii o No-load input current Io = 0, Vi min to Vi max 70 50 mA Ii rr Reflected ripple current Io = 0 to Io nom 30 30 mApp Ii inr p Inrush peak current 4 Vi = Vi nom 8 9 A Ci Input capacitance For surge calculation 2 1.3 µF VSD Shutdown voltage Converter disabled -10 to +0.7 -10 to +0.7 V Converter operating open circuit or 2 to 20 open circuit or 2 to 20 RSD Shutdown input resistance approx. 10 approx. 10 kΩ ISD Input current during shutdown Vi min to Vi max 12 6 mA fs Switching frequency Vi min to Vi max, Io = 0 to Io nom 220 240 220 240 kHz Model 70IMX35 110IMX35 Unit Characteristics Conditions min typ max min typ max Vi Input voltage range 1 TA min to TA max, Io = 0 to Io nom 40 2 121 60 2 150 5 VVi nom Nominal input voltage 70 110 Vi sur Repetitive surge voltage Abs. max input (3 s) 150 170 tstart-up Converter start-up time 2 Switch on Worst case condition at Vi min, and full load 0.25 0.5 0.4 0.7 s SD high 0.1 0.1 trise Rise time 3 Vi nom, resistive load 3 3 ms Io nom, capacitive load 6 12 6 12 Ii o No-load input current Io = 0, Vi min to Vi max 30 20 mA Ii rr Reflected ripple current Io = 0 to Io nom 30 30 mApp Ii inr p Inrush peak current 4 Vi = Vi nom 7 7 A Ci Input capacitance For surge calculation 0.5 0.5 µF VSD Shutdown voltage Converter disabled -10 to +0.7 -10 to +0.7 V Converter operating open circuit or 2 to 20 open circuit or 2 to 20 RSD Shutdown input resistance approx. 10 approx. 10 kΩ ISD Input current during shutdown Vi min to Vi max 5 5 mA fs Switching frequency Vi min to Vi max, Io = 0 to Io nom 220 240 225 6 kHz 1 Vi min will not be as stated, if Vo is increased above Vo nom by use of Trim input. If the output voltage is set to a higher value, Vi min will be proportionately increased. 2 Input undervoltage lockout at typ. 85% of Vi min. 3 Measured with resistive and max. admissible capacitive load. 4 Source impedance according to ETS 300132-2, version 4.3. 5 154 V during 2 s 6 Revision BA or later. Older converters had fs ≤ 240 kHz.

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 5 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Inrush Current The inrush current has been made as low as possible by choosing a very small input capacitance. A series resistor may be installed in the input line to further reduce this current. t 04022b 0 20 40 60 80 100 µs A Vo nom Vo tstartup trise t 04008b Fig. 2 Typical inrush current at Vi nom, Po nom versus time (40IMX35). Source impedance according to ETS 300132-2 at Vi nom. Fig. 3 Converter start-up and rise time (see table 2) Reverse Polarity Protection The built-in suppressor diode also provides for reverse polarity protection at the input by conducting current in the reverse direction. An external fuse is required to limit this current. Table 3: Recommended external fuses in the non-earthed input line Model Fuse type 20IMX35 F 8.0 A 40IMX35 F 4.0 A 70IMX35 F 2.0 A 110IMX35 F 1.5 A Input Transient Voltage Protection A built-in suppressor diode provides effective protection against input transients, which may be generated for example by short- circuits across the input lines, where the network inductance may cause high energy pulses. Table 4: Built-in transient voltage suppressor Model Breakdown voltage VBR nom [V] Peak power at 1 ms PP [Ω] Peak pulse current IPP [A] 20IMX35 39 1500 22 40IMX35 100 1500 9.7 70IMX35 151 600 2.9 110IMX35 176 600 2.5 For very high energy transients as for example to achieve IEC/EN 61000-4-5 compliance (as per table Electro magnetic Immunity) an external inductor and capacitor are required. The components should have similar characteristics as listed in table below. Table 5: Components for external circuitry for IEC/EN 61000-4-5, level 2 Model Inductor (L) Capacitor (C1 , C2) Diode (D) 20IMX35 1.45 mH / 5 A C1, C2: 220 μF / 50 V 1.5 k E47A 40IMX35 4 mH / 3 A C1, C2: 100 μF / 100 V --- 70IMX35 4 mH / 1.5 A C1: 120 μF / 160 V C2: 240 μF / 160 V --- 110IMX35 4.5 mH / 1.5 A C1: 120 μF / 200 V C2: 240 μF / 200 V --- Vi+ Vi– L D IMX35 Fig. 4 Example for external circuitry to comply with IEC/EN 61000-4-5; the diode D is only necessary for 20IMX35 models.

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 6 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Electrical Output Data We recommend connecting an external 1 µF ceramic capacitor across the output pins. General conditions: – TA = 25 °C, unless TC is specified – Pins 8 (shutdown or i), 6 (W), 5 (Trim or Trim1), and 1 (PUL) left open-circuit (not connected), unless specified. Table 6: Output data per double-output powertrain (Vo1/Vo4 or Vo2/Vo3; each power train has 2 outputs) Output 2 x 5 V 2 x 12 V 2 x 15 V Unit Characteristics Conditions min typ max min typ max min typ max Vo1 Vo2 Output voltage Vi nom, Io = 0.5 Io nom 4.95 4.94 5.05 5.06 11.88 11.86 12.12 12.14 14.85 14.82 15.15 15.18 V Io nom Output current 20IMX Vi min to Vi max 2 x 1.35 2 x 0.65 2 x 0.55 A 40IMX 2 x 1.40 2 x 0.70 2 x 0.60 70IMX 2 x 1.40 2 x 0.70 2 x 0.60 110IMX 2 x 1.40 2 x 0.70 2 x 0.60 Io L Current limit 1 20IMX Vi nom, TC = 25 °C, Vo = 93% Vo nom 3.5 1.8 1.5 40IMX 3.8 2.0 1.7 70IMX 3.8 2.0 1.7 110IMX 3.8 2.0 1.7 ∆Vo Line regulation Vi min to Vi max, Io nom ±1 ±1 ±1 % ∆Vo l Load regulation Vi nom, Io = (0.1 to 1) Io nom ±3 ±3 ±3 Vo1/2 Output voltage noise 5 Vi min to Vi max Io = Io nom 2 80 120 150 mVpp3 40 60 70 Vo L Output overvoltage limit 4 Min. load 1% 115 115 115 % Co ext Admissible capacitive load per power train 6 produced after 2011 produced until 2011 6000 4000 680 470 470 330 µF Vo d Dynamic load regulation Voltage deviation Vi nom, Io nom ↔ 1/2 Io nom ±250 ±480 ±520 mV t d Recovery time 0.75 0.75 0.75 ms αVo Temperature coefficient ∆Vo / ∆TC Vi min to Vi max, Io = (0.1 to 1) Io nom ±0.02 ±0.02 ±0.02 %/K 1 Both outputs of each powertrain connected in parallel. The current limit is primary side controlled. In the case of an overload condition, the thermal protection may cause the converter to shut down (automatic restart on cool-down). 2 BW = 20 MHz, measured with an external capacitor of 1 µF across the output pins.

3 Measured with a probe according to EN 61204

4 The output overvoltage protection is located on the primary side. It is not tracking the Trim/Trim1 control. 5 Both outputs of each powertrain connected in parallel. 6 Sum of capacities on the outputs of each powertrain.

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 7 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Thermal Considerations If a converter, mounted on a PCB, is located in free, quasi-stationary air (convection cooling) at the indicated maximum ambient temperature TA max (see table Temperature specifi cations) and is operated at its nominal input voltage and output power, the case temperature TC (TC Z with option Z) measured at the measuring point of case temperature (see Mechanical Data) will approach the indicated value TC max after the warm-up phase. However, the relationship between TA and TC depends heavily on the conditions of operation and integration into a system. The thermal conditions are influenced by input voltage, output current, airflow, temperature of surrounding components and the surfaces and properties of the printed circuit board. TA max is therefore only an indicative value, and under practical operating conditions, the ambient temperature TA may be higher or lower than this value. Caution: The case temperature TC (or TC Z) measured at the measuring point of case temperature (see Mechanical Data) may under no circumstances exceed the specified maximum value. The installer must ensure that under all operating conditions TC (or TC Z) remains within the limits stated in the table Temperature specifications. The converters provide the specified output power with free air convection cooling. In the upper temperature range the output power derating below should be observed. 1.0 0.8 0.6 0.4 0.2 20 40 60 80 100 °C Po/Po max 11047-X35a TA 0.5 m/s = 100 LFM natural cooling Fig. 5 Maximum allowed output power versus ambient temperature (models with and without option Z) Overtemperature Protection The converter is protected against possible over heating by means of an internal temperature monitoring circuit located on the primary side. It shuts down the converter above the internal temperature limit and attempts to restart auto matically. This feature prevents excessive internal temperature building up which could occur under overload conditions. Short Circuit Behavior The current limit characteristic shuts down the converter whenever a short circuit is applied to an output. It acts self-protecting and automatically recovers after removal of the overload condition (hiccup mode). 100 Vo [%] t 05041b 0.3 s overload short-circuit condition switch-off Fig. 6 Overload switch off (hiccup mode), typical values.

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 8 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Series and Parallel Connection The outputs of one or several double-output powertrains may be connected in series respecting the current limitation. Both outputs of the same powertrain can always be connected in parallel in will behave like a single output. Several outputs of the same converter with equal output voltage (e.g. 5 V / 5 V) can be connected in parallel and will share their output currents almost equally. If outputs of the same converter are being parallel and series-connected, it is recommended that outputs from the same powertrains are parallel-connected first. This applies for instance, if 24 V shall be generated by a converter with four 12 V outputs; see fig. 7. PWM Vi+ SD PUL 5Trim 7Ref 2Vi– Vo4– Vo1+ Vo1– Vo4+ Vo2+ Vo2– Vo3+ Vo3– 3n.c. JM138a n.c. –24V +24V IMX35D12D12 Fig. 7 Generating 24 V with an IMX35D12D12-8 Note: Parallel operation of several converters may cause start-up problems. This becomes noticeable in applications, where one converter is not able to deliver the full resistive and capacitive load current alone, as it is required in true redundant systems. Typical Performance Curves General conditions: – TA = 25°C, unless TC is specified. – Shut down and Trim pin left open-circuit. Vo [V] 0.5 1 1.5 2 A Io total 05020-X35 11.5 12.5 13.5 Vo4 [V] 05164b Io4 = 0.35 A Io4 = 0.035 A Io1 Fig. 8 Vo versus Io (typ.) of a double-output power train, with both outputs in parallel (e.g., Vo1/4 of a 40IMX35D12D12) Fig. 9 Cross load regulation (typ.) on powertrain 1. Vo4 versus Io1

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 9 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Vo1, Vo4 [V] Io1/Io1 nom 05039b Vo1 Vo4 Fig. 10 Flexible load distribution (typ.) on power train 1 of a 40IMX35D12D12-8: Vo1 versus Io1, Io4 = 0.5 Io4 nom η [%] 50 75 100 % Po Po total25 05153a Vi min Vi nom η [%] 50 75 100 % Po Po total25 05152a Vi min Vi nom Fig. 11 Efficiency versus input voltage and load. Typical values (20IMX35D12D12-8) Fig. 12 Efficiency versus input voltage and load. Typical values (40IMX35D12D12-8)

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 10 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Auxiliary Functions Adjustable Output Voltage As a standard feature, the IMX35 offer adjustable output voltages in the range of 85 to 105% of Vo nom. Fig. 13 shows the schematic diagram for the adjustment of quad-output models. All models with equal output voltages have a Trim input at pin 5 referenced to the primary side, influencing all outputs simultaneously. Models with different output voltages exhibit a Trim1 input, influencing only the first power train (Vo1 and Vo4). Adjustment by means of an external resistor Rext: Trim Vo1+ Vo2– Vext Vi+ Vi– Rext Vo1– Vo2+ 06137c Control circuit Vref = 2.5 V Fig. 13 Output voltage control by means of the Trim input Table 7: Rext for Vo > Vo nom; approximate values (Vi nom, Io = 0.5 Io nom) Vo [%Vo nom] Rext [kΩ] Trim Trim 1 105 to 108 (107 typically) 105 102 100 110 Table 8: Vo versus Vext for Vo = 85 to 105% Vo nom; typical values (Vi nom, Io = 0.5 Io nom) Vo [%Vo nom] Vext [V] Trim [V] Trim 1 [V] > 105 102 100 1.8 2.5 4.3 6.2 1.5 2.5 4.25 6.2 Adjustment of the output voltage by means of an external resistor Rext is possible within the range of 100 to 105% of Vo nom. Rext should be connected between Trim (pin 5) and Vi– (pin 2). The following table indicates suitable resistor values for typical output voltages under nominal conditions (Vi nom, Io = 0.5 Io nom). Note: Connection of Rext to Vi+ may damage the converter. Adjustment by means of an external voltage source Vext For external output voltage adjustment in the range 85 to 105% of Vo nom a voltage source Vext (0 to 20 V) is required, connected to Trim or Trim1 (pin 5) and Vi–. The table below indicates typical values Vo versus Vext. Applying a control voltage of 15 to 20 V will set the converter into the hiccup mode. Direct paralleling of the Trim pins of converters of the same type connected in parallel is feasible. Synchronization (W) It is possible to synchronize the switching frequency of one or more converters to an external clock signal. This logic input W can be used to synchronize the oscillator to an external frequency source. This signal is edge-triggered with TTL thresholds and requires a source frequency of 490 to 540 kHz (duty cycle 10 to 90%). The external source frequency is internally divided by 2 to define the switching frequency of the converter. If unused, this pin can be connected to V1– (pin 2) or left open-circuit. Reference Output (Ref) The converter provides a stable 5 V (±0.1 V) reference signal on pin 7 (Ref). The output is protected by a 1 kΩ resistor. The signal may be used also in conjunction with the Trim input (pin 5) as a limited external voltage reference. It is recommended to connect a filter capacitor (0.1 µF) between Ref and Vi–, if Ref is used.

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 11 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Shutdown The outputs of the converters may be enabled or disabled by means of a logic signal (TTL, CMOS, etc.) applied to shut down (pin 8). If the shutdown function is not required, pin 8 should be left open-circuit: Converter operating: 2.0 to 20 V Converter disabled: –10 to +0.7 V Progr. Input Undervoltage Lockout PUL A special feature of the converter (with Rev. BA or later) is the adjustable undervoltage lockout protection, which protects the converter (and the system) from high current caused by operation at low input voltages. This ensures easier start-up in distributed power systems. The table below shows the band of switch on/off and the hysteresis. Table 9: Trigger level and hysteresis (pin 1 left open) Model Trigger level Hysteresis Unit 20IMX35 7 to 8 <0.5 V 40IMX35 14 to 15.5 <1 70IMX35 31 to 34 <3 110IMX35 42 to 50 < 8 The undervoltage lockout levels may be programmed by using an external resistor RPUL between PUL and Vi– to increase the preset levels as specified in table 10. Table 10: Typical values for RPUL and the respective lockout voltage for input voltage. 20IMX35 40IMX35 RPUL [kΩ] Vi min [V] RPUL [kΩ] Vi min [V] ∞ ≤8 ∞ ≤15.5 39 10 43 22 19 12 16 26 13 14 10 28 9.1 16 0 32 70IMX35 110IMX35 RPUL [kΩ] Vi min [V] RPUL [kΩ] Vi min [V] ∞ 31 ∞ 42 270 40 270 50 110 50 120 60 80 55 51 75

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 12 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Electromagnetic Compatibility (EMC) A suppressor diode together with an input filter form an effective protection against high input transient voltages which typically occur in many installations, but especially in battery-driven mobile applications. Electromagnetic Immunity Table 11: Immunity type tests Phenomenon Basic Standard Level Coupling mode 1 Value applied Waveform Source imped. Test procedure In oper. Perf. crit.2 Electrostatic discharge to case (not with option Z) IEC/EN 61000-4-2 2 3 contact discharge (Trim pin open) 6000 Vp 1/50 ns 330 Ω 150 pF 10 pos. & 10 neg. discharges yes B Electromagnetic field IEC/EN 61000-4-3 x 4 antenna 20 V/m AM 80% / 1 kHz N/A 80 – 800 MHz yes A 5 antenna

20 V/m

10 V/m

5 V/m

AM 80% / 1 kHz N/A 800 – 1000 MHz 1400 – 2100 MHz 2100 – 2500 MHz 5100 – 6000 MHz yes A Electrical fast transients / burst IEC/EN 61000-4-4 3 6 direct +i/–i ±2000 Vp bursts of 5/50 ns; 5 kHz over 15 ms burst period 300 ms 50 Ω 60 s positive 60 s negative transients yes A Surges IEC/EN 61000-4-5 3 7 +i/–i ±1000 Vp 1.2 / 50 µs 42 Ω 0.5 μF 5 pos. & 5 neg. surges yes A RF Conducted immunity IEC/EN 61000-4-6 3 8 +i/–i 10 VAC (140 dBμV) AM modulated 80% / 1 kHz 50 Ω 0.15 – 80 MHz 150 Ω yes A 1 i = input, o = output, c = case (not with option Z) 2 A = normal operation, no deviation from specification, B = temporary deviation from specs. possible. 3 Corresponds to EN 50121-3-2:2016 table 5.3 4 Corresponds to EN 50121-3-2:2016 table 5.1 5 Corresponds to EN 50121-3-2:2016 table 5.2 6 Corresponds to EN 50121-3-2:2016 table 3.2 7 Corresponds to EN 50121-3-2:2016 table 3.3, external components required; see fig. 15 8 Corresponds to EN 50121-3-2:2016 table 3.1 Electromagnetic Emissions Fig. 14 Typ disturbances (quasi-peak and average) at the input according to EN 50121-4, measured at Vi nom and Io nom (110IMX35D05D15-8). Conducted Emissions Compliance with EN 55011 group 1, class A, and EN 50121-4 was tested with the filter Fig. 4 (values Table 5) see page 5. The resuts are shown in Fig. 14 above.

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 13 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Immunity to Environmental Conditions Table 12: Mechanical and climatic stress Test method Standard Test Conditions Status Cab Damp heat steady state IEC/EN 60068-2-78 MIL-STD-810D section 507.2 Temperature: 40 ±2 °C Converter not operatingRelative humidity: 93 +2/-3 % Duration: 56 days Ka Salt mist test (sodium chloride NaCl solution) 2 EN 50155:2007 clause 12.2.10 class ST3 2 Temperature: 35 ±2 °C Converter not operating Duration: 48 h Fc Vibration (sinusoidal) IEC/EN 60068-2-6 MIL-STD-810D section 514.3 Acceleration amplitude: 0.35 mm (10 – 60 Hz) 5 gn = 49 m/s2 (60 - 2000 Hz) Converter operating Frequency (1 Oct/min): 10 – 2000 Hz Test duration: 7.5 h (2.5 h in each axis) Fh Random vibration road-band (digital control) & guidance IIEC/EN 60068-2-64 Acceleration spectral density: 0.05 gn 2/Hz Converter operating Frequency band: 8 to 500 Hz Acceleration magnitude: 4.9 gn rms Test duration: 1.5 h (0.5 h in each axis) Ea Shock (half-sinusoidal) IEC/EN 60068-2-27 MIL-STD-810D section 516.3 Acceleration amplitude: 50 gn = 490 m/s2 Converter operating Bump duration: 11 ms Number of bumps: 18 (3 in each direction) - Shock EN 50155:2007 clause 12.2.11 EN 61373 sect. 10, class B, body mounted 1 Acceleration amplitude: 5.1 gn Converter operating Bump duration: 30 ms Number of bumps: 18 (3 in each direction) - Simulated long life testing at increased random vibration levels EN 50155:2007 clause 12.2.11 EN 61373 sect. 8 and 9, body mounted 1 Acceleration spectral density: 0.02 gn 2/Hz Frequency band: 5 to 150 Hz Converter operating Acceleration magnitude: 0.8 gn rms Test duration: 15 h (5 h in each axis)

1 Body mounted = chassis of a railway coach

2 Models without option Z

Table 13: Temperature specifications, valid for air pressure of 800 to 1200 hPa (800 to 1200 mbar) Model -8 Unit Characteristics Conditions min typ max TA Ambient temperature Operational 1 - 40 3 85 1 TC Case temperature (without opt. Z) 2 - 40 3 105 2 TC Z Components temperature with opt. Z 2 - 40 3 105 2 TS Storage temperature Non operational - 55 85

1 See Thermal Considerations

2 Temperature measurement point; see Mechanical Data

3 Start-up at –55 °C

Table 14: MTBF at nom. load Ratings Ground benign Ground fixed Ground mobile Device hours 1 Unit Model Standard 40 °C 40 °C 70 °C 50 °C 40IMX35 MIL-HDBK-217F, TC 336 000 141 000 86 000 110 000 396 000 h110IMX35 Bellcore, TA 1 445 000 529 000 294 000 144 000

1 The device hours are based upon the IMX35 series field failure rate recorded between 2000 and 2005

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 14 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Mechanical Data Dimensions in mm (inches). Tolerances ±0.3 mm, unless otherwise noted. 63.5 76.2 63.5 0.8 x 0.8 5.08 5 ±0.3 10.5 ±0.3 09121d 69.6 56.9 thread M3 TC Bottom view 4 threads M3 European Projection 5.08 47.8 63.5 72.8 6.4 ±0.3 8.9 ±0.2 0.8 x 0.8 09123c TC Z TC Z Cores TC Z Bottom view Fig. 15 Case IMX35 (Standard) Material: Zinc; weight: approx. 67 g Fig. 16 Case IMX35 open frame (option Z) Weight: approx. 43 g Safety and Installation Instruction Pin Allocation Table 15: Pin allocation Pin No. Quadruple output Pin No. Quadruple output

1 PUL 11 Vo3-

2 Vi- 12 Vo3+

3 n.c. 13 Vo2+

4 Vi+ 14 Vo2-

5 Trim or Trim 1 15 Vo1-

6 W 16 Vo1+

7 Ref 17 Vo4+

8 SD or i 18 Vo4-

19 n.c. 09122b Bottom view 4 threads M3 Fig. 17 Footprint. The holes in the PCB should have a diameter of 1.6 mm.

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 15 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Installation Instructions Installation of the converters must strictly follow the national safety regulations in compliance with the enclosure, mounting, creepage, clearance, casualty, markings, and segregation requirements of the end-use application. Connection to the system shall be made via a printed circuit board with hole diameters of 1.5 mm for the pins. The converters should be connected to a secondary circuit. Do not open the converter. Ensure that a converter failure (e.g., by an internal short-circuit) does not result in a hazardous condition. Input Fuse To prevent excessive current flowing through the input supply line in case of a short-circuit in the converter, an external fuse should be installed in the non-earthed input line. We recommend a fast acting fuse specified in table 3. Standards and Approvals All converters are safety-approved to IEC/EN 62368-1 3rd edition and UL/CSA 60950-1 2nd edition. The converters have been evaluated for:

Building-in
Basic insulation input to output, based on their maximum input voltage
Pollution degree 2 (not option Z)
Connecting the input to a secondary circuit, which is subject to a maximum transient rating of 1500 V. The converters are subject to manufacturing surveillance in accordance with the above mentioned standards. CB scheme is available. Railway Applications To comply with Railway standards, all components are coated with a protective lacquer (except for option Z). Protection Degree and Cleaning Liquids The protection degree is IP 30 (not for option Z). In order to avoid damage, any penetration of cleaning fluids should be prevented, since the converters are not hermetically sealed. However, open-frame models (option Z) leave the factory unlacquered; they may be lacquered by the customer, for instance together with the mother board. Cleaning liquids are not permitted – except washing at room temperature with isopropyl alcohol and de-inonized/destilled water (1 : 1). Note: Cleaning liquids can damage the adhesive joints of the ferrite cores. Isolation The electric strength test is performed in the factory as a routine test in accordance with EN 62911 and EN 62368-1 3rd edition, and should not be repeated in the field. The Company will not honor any warranty claims resulting from electric strength field tests. Table 16: Electric strength test voltages Characteristics Input to (outputs + case) Input to (outputs + case) Outputs to case all models 3 Betveen outputs all models Unit 20/40IMX35 3 70/110IMX35 3 Insulation resistance (500 VDC) >100 > 100 - - MΩ IMX35 units produced before 2013 were tested with 1.2 kVAC only. 2 The test voltage between outputs is not applied as routine test. 3 For open-frame models (option Z), only the insulation input to outputs is tested.

tech.support@psbel.com belfuse.com/power-solutions BCD20009-G Rev F , 20-Nov-2020 Page 16 of 16 IMX35 Series © 2020 Bel Power Solutions & Protection Description of Options i: Inhibit (Negative Shutdown Logic) The outputs of the converter may be enabled or disabled by means of a logic signal (TTL, CMOS, etc.) applied to the inhibit pin 8. If the inhibit function is not required the inhibit (pin 8) should be connected to Vi– to enable the output (active low logic, fail safe). Voltage at pin 8: Converter operating: –10 V to 0.8 V Converter disabled: 2.4 V to 20 V or left open-circuit Vi+ Vi– i 06138a Fig. 18 If the inhibit pin is not used, connect it to Vi–. Z: Open Frame For applications, where the protection by a housing is not necessary or in the case that the motherboard should be lacquered after fitting the converter. Note: The converters shall not be exposed to cleaning processes, as this will damage the glue of the ferrite cores. G: RoHS-6 Converters with a type designation ending by G are RoHS-compliant for all six substances. Non-G models are produced with leaded solder and are not RoHS-compliant. They are not preferred models. NUCLEAR AND MEDICAL APPLICATIONS - These products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice.

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