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50 Watts

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 1 of 7 Size: 2.28in x 1.45in x 0.50in (57.9mm x 36.8mm x 12.7mm)

FEATURES

  • Quarter Brick Package
  • Wide Input Range
  • High Efficiency
  • No Minimum Load Requirement
  • Remote On/Off
  • Over Load, Over Voltage, Short Circuit, and Over Temperature Protection
  • Fire Protection and RoHS & REACH Compliance
  • cUL/UL 60950-1, IEC/EN60950-1, EN50155, and IEC 60571 Safety Approvals

DESCRIPTION

The DCMQ50 series of DC/DC railway converters offers 50 watts of output power in a 2.28” x 1.45” x 0.50” standard quarter brick package. This series consists of single output models with a wide input range and high efficiency. Each model has remote on/off, fire protection, and optional heatsink. They also have over load, over voltage, short circuit, and over temperature protection and are RoHS & REACH compliant. This series has cUL/UL 60950-1, IEC/EN60950-1, EN50155, and IEC 60571 safety approvals. MODEL SELECTION TABLE Model Number(1) Input Voltage Range Output Voltage Input Current Max. Output Current Over Voltage Protection Max. Capacitive Load Efficiency Reflected Ripple Current Output Power No Load Max Load DCMQ50-72S05 72VDC (43~101VDC) 5VDC 50mA 771mA 10000mA 6.2VDC 17000µF 90% 35mA 50W DCMQ50-72S12 12VDC 45mA 755mA 4170mA 15VDC 2950µF 92% DCMQ50-72S15 15VDC 45mA 754mA 3330mA 18VDC 1900µF 92% DCMQ50-72S24 24VDC 50mA 762mA 2080mA 30VDC 740µF 91% DCMQ50-110S05 110VDC (66~160VDC) 5VDC 40mA 505mA 10000mA 6.2VDC 17000µF 90% 35mA 50W DCMQ50-110S12 12VDC 35mA 500mA 4170mA 15VDC 2950µF 91% DCMQ50-110S15 15VDC 35mA 494mA 3330mA 18VDC 1900µF 92% DCMQ50-110S24 24VDC 40mA 499mA 2080mA 30VDC 740µF 91% SPECIFICATIONS All specifications are based on 25°C, Resistive Load, Nominal Input Voltage, and Rated Output Current unless otherwise noted. We reserve the right to change specifications based on technological advances. SPECIFICATION TEST CONDITIONS Min Typ Max Unit INPUT SPECIFICATIONS Input Voltage Range 72V Input Models 43 72 101 VDC 110V Input Models 66 110 160 Input Surge Voltage (100ms. Max) 72V Input Models -0.7 165 VDC 110V Input Models -0.7 250 Start-Up Threshold Voltage 72V Input Models 43 VDC 110V Input Models 66 Under Voltage Shutdown 72V Input Models 40 VDC 110V Input Models 63 Input Filter All Models Internal Pi Type OUTPUT SPECIFICATIONS Output Voltage See Table Voltage Accuracy ±1.0 %Vnom. Line Regulation Vin=Min. to Max. @Full Load ±0.2 % Load Regulation Io=0% to 100% ±0.3 % Output Power See Table Output Current See Table Minimum Load No Minimum Load Requirement Maximum Capacitive Load See Table Ripple & Noise (20MHz bandwidth)(2) 24V Output 150 mVp-p Other Outputs 100 Transient Recovery Time(3) 25% Load Step Change 250 µsec Transient Response Deviation 25% Load Step Change ±3 ±5 % Start-Up Time All Models 0.35 S Temperature Coefficient ±0.02 %/ºC Trim Up/Down Range % of Nominal Output Voltage ±10 %

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 2 of 7 SPECIFICATIONS All specifications are based on 25°C, Resistive Load, Nominal Input Voltage, and Rated Output Current unless otherwise noted. We reserve the right to change specifications based on technological advances. SPECIFICATION TEST CONDITIONS Min Typ Max Unit REMOTE ON/OFF CONTROL Converter On 3.5V~12V or Open Circuit Converter Off 0V~1.2V or Short Circuit Control Input Current (On) Vctrl=5.0V 0.5 mA Control Input Current (Off) Vctrl=0V -0.5 mA Control Common Referenced to Negative Input Standby Input Current Nominal Vin 2.5 mA PROTECTION Short Circuit Protection Hiccup Mode 0.5Hz typ. Automatic Recovery Over Load Protection Hiccup 150 % Over Voltage Protection See Table Over Temperature Protection Base Plate +110 ºC ENVIRONMENTAL SPECIFICATIONS Operating Temperature Min Max. Unit Without Heatsink With Heatsink Natural Convection, Nominal Vin, Load 100% Inom. DCMQ50-72S12, 72S15, 110S15 -40 72 75 ºC DCMQ50- 72S24, 110S12, 110S24 -40 68 71 DCMQ50-72S05, 110S05 -40 63 67 Storage Temperature -50 +125 ºC Thermal Impedance Natural Convection without Heatsink 7.5 ºC/W Natural Convection with Heatsink 6.8 100LFM Convection without Heatsink 6.1 100LFM Convection with Heatsink 4.1 200LFM Convection without Heatsink 5.3 200LFM Convection with Heatsink 3.3 400LFM Convection without Heatsink 3.9 400LFM Convection with Heatsink 2.2 Base-Plate Temperature Range -40 +105 Operation Humidity Non-Condensing 5 95 %RH Lead Temperature 1.5mm for Case for 10Sec. 260 ºC Cooling Compliance to IEC/EN60068-2-1 Dry Heat Compliance to IEC/EN60068-2-2 Damp Heat Compliance to IEC/EN60068-2-30 Shock & Vibration Test Compliance to IEC/EN 61373 Fire Protection Compliance to EN45545-2 MTBF MIL-HDBK-217F@25ºC Full Load, Ground Benign 314,900 Hours GENERAL SPECIFICATIONS Typical Efficiency @Max Load See Table Switching Frequency 320 KHz Isolation Voltage Reinforced Insulation, Rated for 60 Seconds 3000 VACrms Isolation Resistance 500VDC 1000 MΩ Isolation Capacitance 100KHz, 1V 3000 pF PHYSICAL SPECIFICATIONS Weight 2.15oz (61g) Dimensions (L x W x H) 2.28in x 1.45in x 0.50in (57.9mm x 36.8mm x 12.7mm) Case Material Aluminum Frame with Black Anodized Coating Base Material Top Side Aluminum Plate Bottom Side Non-Conductive Black Plastic Base Plate Potting Material Epoxy (UL94-V0) SAFETY CHARACTERISTICS Safety Approvals cUL/UL 60950-1, IEC/EN 60950-1, EN50155, IEC60571 EMI Conduction & Radiation: EN55022, EN55011, FCC Part 15 Class A ESD EN61000-42 Air±8kV Contact±6kV Class A Radiated Immunity EN61000-4-3 10V/m Class A Fast Transient(5) EN61000-4-4 ±2kV Class A Surge(5) EN61000-4-5 ±2kV Class A Conducted Immunity EN61000-4-6 10Vrms Class A

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 3 of 7 NOTES 1. Heatsink is available for models. To indicate heatsink, add –HS to end of model name. 2. Ripple & Noise measurement with 1µF MLCC and a 10µF tantalum capacitor. 3. Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%. 4. Other input and output voltage may be available, please contact factory. 5. To meet EN61000-4-4 & EN61000-4-5 by adding capacitor across the input pins. Suggested Capacitor: 470µF/200V. 6. Parallel capacitor across the input pins under specification testing. Suggested capacitor: 68µF/200V. 7. Natural convection is about 20LFM but is not equal to still air (0 LFM). *Due to advances in technology, specifications subject to change without notice. DERATING CURVES DCMQ50-72S12, 72S15, 110S15 Derating Curve without Heatsink DCMQ50-72S12, 72S15, 110S15 Derating Curve with Heatsink DCMQ50-75S24, 110S12, 110S24 Derating Curve with Heatsink DCMQ50-72S24, 110S12, 110S24 Derating Curve with Heatsink DCMQ50-72S05, 110S05 Derating Curve without Heatsink DCMQ50-72S05, 110S05 Derating Curve with Heatsink

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 4 of 7 MECHANICAL DRAWINGS Pin Connections Pin Function 1 +Vin

2 Remote On/Off

5 *-Sense

6 Trim

7 *+Sense 8 +Vout *If remote sense not used the +sense should be connected to +output and –sense should be connected to –output. Maximum output deviation is 10% inclusive of trim. Notes: All dimensions in mm (inches) Tolerance: X.X±0.5 (X.XX±0.02) X.XX±0.25 (X.XXX±0.01) Pin Diameter Ø1.0 ±0.05 (0.04±0.002) Pin Diameter Ø1.5 ±0.05 (0.06±0.002) Heatsink (Option –HS) Heatsink Material: Aluminum Finish: Black Anodized Coating Weight: 13g Advantages of adding heatsink: Improves heat dissipation and increases the stability and reliability of the DC/DC converters at high operating temperatures. EXTERNAL FILTER External Filter meets Conducted and Radiated EMI EN55011 & EN55022 Class A; FCC part 15 Level A Model L1 C1 C3 C4 C5 C6 DCMQ50-72SXX 450µH/450µH CHEMI-CON KXG Series 68µF/200V 2200pF 3KV 2200pF 3KV 2200pF 3KV 2200pF 3KV DCMQ50-110SXX EXTERNAL OUTPUT TRIMMING

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 5 of 7 Output can be externally trimmed by using the method shown below. DCMQZ50-XXS05 Trim Table Trim Down 1 2 3 4 5 6 7 8 9 10 % Trim Up 1 2 3 4 5 6 7 8 9 10 % DCMQZ50-XXS12 Trim Table Trim Down 1 2 3 4 5 6 7 8 9 10 % Trim Up 1 2 3 4 5 6 7 8 9 10 % DCMQZ50-XXS15 Trim Table Trim Down 1 2 3 4 5 6 7 8 9 10 % Trim Up 1 2 3 4 5 6 7 8 9 10 % DCMQZ50-XXS024 Trim Table Trim Down 1 2 3 4 5 6 7 8 9 10 % Trim Up 1 2 3 4 5 6 7 8 9 10 %

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 6 of 7 TEST SETUP Input Reflected Ripple Current Test Setup Input reflected-ripple current is measured with an inductor Lin (4.7µH) and Cin (220µF, ESR <1.0Ω at 100KHz) to simulate source impedance. Capacitor Cin, offsets possible battery impedance. Current ripple is measured at the input terminals of the module, measurement bandwidth is 0-500KHz. Peak-to-Peak Output Noise Measurement Test Use a 1µF ceramic capacitor and a 10µF tantalum capacitor. Scope measurement should be made using a BNC socket, measurement bandwidth is 0-20MHz. Position the load between 50mm and 75mm from the DC/DC Converter. TECHNICAL NOTES Remote On/Off Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin, and off during a logic low. To turn the power module on and off, the user must supply a switch to control the voltage between the on/off terminal and the –Vin terminal. The on/off terminal (Pin 2) during a logic low is -500µA. Overload Protection To provide hiccup mode protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure overload for an unlimited duration. Overvoltage Protection The output overvoltage clamp consists of control circuitry, which is independent of the primary regulation loop that monitors the voltage on the output terminals. The control loop of the clamp has a higher voltage set point than the primary loop. This provides a redundant voltage control that reduces the risk of output overvoltage. The OVP levels can be found in output data. Output Ripple Reduction A good quality low ESR capacitor placed as close as practicable across the load will give the best ripple and noise performance. To reduce output ripple, it is recommended to use 4.7µF capacitors at the output. Maximum Capacitive Load The DCMQ50 series has limitation of maximum connected capacitance at the output. The power module may be operated in current limiting mode during start-up, affecting the ramp-up and the startup time. The maximum capacitance can be found in the data sheet. Thermal Considerations Many conditions affect the thermal performance of the power module, such as orientation, airflow over the module and board spacing. To avoid exceeding the maximum temperature rating of the components inside the power module, the case temperature must be kept below 105ºC. The derating curves are determined from measurements obtained in a test setup.

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 7 of 7 COMPANY INFORMATION Wall Industries, Inc. has created custom and modified units for over 50 years. Our in- house research and development engineers will provide a solution that exceeds your performance requirements on- time and on budget. Our ISO9001-2008 certification is just one example of our commitment to producing a high quality, well-documented product for our customers. Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with its customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for your project above and beyond the design and production phases. Give us a call today to discuss your future projects. Contact Wall Industries for further information: Phone: (603)778-2300 Toll Free: (888)597-9255 E-mail: sales@wallindustries.com Web: www.wallindustries.com Address: 37 Industrial Drive Exeter, NH 03833