437A

437A_V01 LITTELFUSE | Alldatasheet

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Technical content

Surface Mount Fuse Datasheet © 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 12/05/23 437A Series AEC-Q200 Qualified > 1206 Fast-Acting Ceramic Fuse

Description

The 437A Series AECQ-Qualified fuses are specifically tested to cater to secondary circuit protection needs of compact auto- electronics applications. The general design ensures excellent temperature stability and performance reliability. In addition to this, the high I²t values typical of the Littelfuse Ceramic Fuse family ensure high inrush current withstand capability. Agency Approvals Agency Agency File Number Ampere Range E10480 0.250A − 8.0A 29862 0.250A − 8.0A N/A 0.250A − 1 .75A J50519871 0.500A − 8.0A N/A 0.250A − 1 .75A Features & Benefits Electrical Characteristics for Series ■ Operating Temperature from -55ºC to +150ºC ■ 100% Lead-free, Halogen-Free and RoHS compliant ■ Fast response to faulty current to ensure over-current protection for sensitive electronic components ■ AEC-Q200 Qualified ■ Recognized to UL/CSA/NMX 248-1 and UL/CSA/NMX 248- ■ Conforms to EN/IEC 60127-1 and EN/IEC 60127-7 ■ Conforms to the Low Voltage Directive (LVD) % of Ampere Rating Ampere Rating Opening Time at 25ºC 100% 0.250A − 8A 4 hours, Minimum 250% 0.750A − 8A 5 seconds, Maximum 350% 0.750A − 8A 1 second, Maximum 0.250A - 0.500A 5 seconds, Maximum

Applications

(A) Amp Code Max. Voltage Rating (V) Interrupting Rating 1 Nominal Resistance (Ohms) 2 Nominal Melting I2t (A2Sec.) 3 Nominal Voltage Drop At Rated Current (V) 4 Nominal Power Dissipation At Rated Current (W) Agency Approvals 0.750 .750 63 50A @ 63VAC/DC 100A @ 63VDC 0.600 0.064 0.45 0.338 x x x x x 1. 0 0 0 01. 63 50A @ 63VAC/DC 0.420 0.100 0.41 0.410 x x x x x 2.50 02.5 63 50A @ 45VAC/63VDC 50A @ 32VAC/35VDC 0.043 0.441 0.15 0.375 x x x x x Electrical Specifications by Item Notes: 1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting Rating tested at rated voltage with time constant < 0.8 msec. 2. Nominal Resistance measured with < 10% rated current. 3. Nominal Melting I²t measured at 1 msec. opening time. 4. Nominal Voltage Drop measured at rated current after temperature has stabilized. RoHS Pb ■ Li-ion Battery ■ LED Lighting ■ Automotive Navigation System ■ TFT Display ■ Battery Management System (BMS) ■ Instruments Clusters 5. 50A @ 32VAC/35VDC is AECQ Tested Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See “Temperature Re-rating Curve”for additional re-rating information. Devices designed to be mounted with marking code facing up. Resources Accessories Samples Additional Information

Surface Mount Fuse Datasheet © 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 12/05/23 437A Series AEC-Q200 Qualified > 1206 Fast-Acting Ceramic Fuse Average Time Current Curves .250A .375A .500A .750A 1.25A 1.5A 1.75A2A 2.5A 3A3.5A4A 5A 7A 8A 0,001 0,01 0,1 100 0,11 10 100 TIME IN SECONDS CURRENT IN AMPERES Reflow Condition Pb-free assembly Pre Heat - T emperature Min (Ts(min)) 150°C - T emperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 180 seconds Average Ramp-up Rate (Liquidus T emp (TL) to peak) 5°C/second max. TS(max) to TL - Ramp-up Rate 5°C/second max. Reflow - T emperature (TL) (Liquidus) 217°C - T emperature (tL) 60 – 150 seconds Peak T emperature (TP) 260+0/-5 °C Time within 5°C of actual peak T emperature (tp) 20 – 40 seconds Ramp-down Rate 5°C/second max. Time 25°C to peak T emperature (TP) 8 minutes max. Do not exceed 260°C Wave Soldering 260°C, 10 seconds max. Soldering Parameters T emperature Re-rating Curve 100 120 140 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (°C) PERCENT OF RATING Time Temperature TP TL TS(max) TS(min) tP tL tS time to peak temperature (t 25ºC to peak) Ramp-down Ramp-up Preheat Critical Zone TL to TP Example: For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: Note: 1. Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. Part Numbering System 0437 005. W R A SERIES AMP CODE QUANTITY CODE PACKING CODE AEC-Q200 QUALIFIED W = 3000 pcs R = Tape and Reel

Surface Mount Fuse Datasheet © 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 12/05/23 437A Series AEC-Q200 Qualified > 1206 Fast-Acting Ceramic Fuse Materials Body: Advanced Ceramic T erminations: Ag/Ni/Sn (100% Lead-free) Element Cover Coating: Lead-free Glass Moisture Sensitivity Level IPC/JEDEC J-STD-020, Level 1 Solderability IPC/EIC/JEDEC J-STD-002, Condition B Humidity T est MIL -STD-202, Method 103, Conditions D Resistance to Solder Heat MIL -STD-202, Method 210, Condition B Moisture Resistance MIL -STD-202, Method 106 High Temperature Storage MIL -STD-202 Method 108 with exemptions Thermal Shock T est JESD22 Method JA-104, Test Conditions B and N Biased Humidity MIL -STD-202 Method 103, 85°C/85% RH with 10% operating power for 1000 hrs Operational Life MIL -STD-202 Method 108, Test Condition D Resistance T o Solvents MIL -STD-202 Method 215 Mechanical Shock MIL -STD-202 Method 213, Test Condition C Product Characteristics Thermal Shock MIL -STD-202, Method 107 , Condition B Mechanical Shock MIL -STD-202, Method 213, Condition A Vibration MIL -STD-202, Method 201 Vibration, High Frequency MIL -STD-202, Method 204, Condition D Dissolution of Metallization IPC/EIC/JEDEC J-STD-002, Condition D T erminal Strength IEC 60127-4 High Frequency Vibration MIL -STD-202, Method 204 Resistance T o Soldering Heat MIL -STD-202 Method 210, Test Condition B Solderability JESD22-B102E Method 1 T erminal Strength For SMD AEC-Q200-006 Board Flex AEC-Q200-005 Electrical Characterization Conducted at minimum, ambient and maximum temperatures. Dimensions mm(inches) 0.520 ± 0.200 [0.020 ± 0.008] 3.200 ± 0.1778 [0.126 ± 0.007] 1.000 [0.039] 1.63 +0.10 / -0.2 NN 1.500 [0.059] 1.800 [0.071] 3.500 [0.138] 1.000 [0.039] 0.835 ± 0.15 [0.0329 ± 0.006] Packaging Part Marking System Packaging Option Packaging Specification Quantity Quantity and Packaging Code 8mm Tape and Reel EIA-481, IEC 60286-3 3000 WRA Amp Code Marking Code .250 D .375 E .500 F .750 G 0 01. H 1 .25 J 01. 5 K 1 .75 L 002. N 02.5 O 003. P 3.500 R 004. S 005. T 0 0 7. W 008. |X| Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics. 0.520 ± 0.200 [0.020 ± 0.008] 3.200 ± 0.1778 [0.126 ± 0.007] 1.000 [0.039] 1.63 +0.10 / -0.2 NN 1.500 [0.059] 1.800 [0.071] 3.500 [0.138] 1.000 [0.039] 0.835 ± 0.15 [0.0329 ± 0.006] 0.520 ± 0.200 [0.020 ± 0.008] 3.200 ± 0.1778 [0.126 ± 0.007] 1.000 [0.039] 1.63 +0.10 / -0.2 NN 1.500 [0.059] 1.800 [0.071] 3.500 [0.138] 1.000 [0.039] 0.835 ± 0.15 [0.0329 ± 0.006] 0.520 ± 0.200 [0.020 ± 0.008] 3.200 ± 0.1778 [0.126 ± 0.007] 1.000 [0.039] 1.63 +0.10 / -0.2 NN 1.500 [0.059] 1.800 [0.071] 3.500 [0.138] 1.000 [0.039] 0.835 ± 0.15 [0.0329 ± 0.006]