0437004.WRA

Fuse Datasheet 437A Series 1206 Fast-Acting Ceramic Fuse RoHS Pb Description The 437A Series AECQ-Compliant fuses are specifically tested to cater to secondary circuit protection needs of compact autoelectronics 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. Features ■ Fast response to faulty current to ensure over-current protection for sensitive ■ 100% Lead-free, Halogen-Free electronic components and RoHS compliant ■ Operating Temperature from -55ºC to +150ºC ■ Meets Littelfuse’s automotive qualifications* Additional Information * - Largely based on Littelfuse internal AEC-Q200 test plan. Applications Resources Accessories Samples Ampere Rating Opening Time at 25ºC 100% 0.250A − 8A 4 hours, Minimum 250% ■ Battery Management System (BMS) ■ Clusters Agency Approvals Agency File Number Ampere Range 5 seconds, Maximum E10480 0.250A − 8A 0.750A − 8A 1 second, Maximum 29862 0.250A − 8A 0.250A - 0.500A 5 seconds, Maximum 0.750A − 8A 350% ■ TFT Display ■ LED Lighting ■ Automotive Navigation System Electrical Characteristics for Series % of Ampere Rating ■ Li-ion Battery Agency Electrical Specifications by Item Ampere Rating (A) Amp Code Max. Voltage Rating (V) 0.250 0.375 0.500 .250 .375 .500 125 125 63 0.750 .750 63 1.00 1.25 1.50 1.75 2.00 2.50 3.00 3.50 4.00 5.00 7.00 8.00 001. 1.25 01.5 1.75 002. 02.5 003. 03.5 004. 005. 007. 008. 63 63 63 63 63 63 63 63 63 63 35 35 Interrupting Rating 1 50A @ 125VAC/DC 50A @ 63VAC/DC 50A @ 63VAC/DC 100A @ 63VDC 50A @ 63VAC/DC 50A @ 45VAC/63VDC 50A @ 32VAC/35VDC Agency Approvals Nominal Resistance (Ohms) 2 Nominal Melting I2t (A2Sec.) 3 Nominal Voltage Drop At Rated Current (V) 4 Nominal Power Dissipation At Rated Current (W) 2.290 1.330 0.908 0.003 0.010 0.018 0.78 0.60 0.52 0.195 0.225 0.260 x x x x x x 0.600 0.064 0.45 0.338 x x 0.420 0.318 0.209 0.071 0.062 0.043 0.035 0.027 0.022 0.0159 0.0100 0.008 0.100 0.256 0.324 0.075 0.144 0.441 0.506 0.777 1.024 2.30 5.02 7.23 0.41 0.40 0.39 0.27 0.20 0.15 0.14 0.13 0.13 0.13 0.13 0.13 0.410 0.500 0.585 0.473 0.400 0.375 0.420 0.455 0.520 0.650 0.910 1.040 x x x x x x x x x x x x x x x x x x x x x x x x 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. 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. 6 © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/08/21 Fuse Datasheet 437A Series 1206 Fast-Acting Ceramic Fuse Temperature Re-rating Curve PERCENT OF RATING 1A 1.25A 1.5A 1.75A 2A 2.5A 3A 3.5A 100 .750A .250A 140 .375A .500A Average Time Current Curves 4A 5A 7A 8A 120 100 10 80 60 -65 -45 -25 -5 15 35 55 75 95 115 135 TIME IN SECONDS 40 155 TEMPERATURE (°C) Note: 1 1. Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. 0,1 Example: For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: I = (0.80)(0.85)IRAT = (0.68)IRAT Part Numbering System 0,01 0437 005. W R A SERIES AEC-Q200 QUALIFIED AMP CODE PACKING CODE 0,001 0,1 R = Tape and Reel 1 10 100 CURRENT IN AMPERES QUANTITY CODE W = 3000 pcs Soldering Parameters Pre Heat Pb-free assembly - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 180 seconds Average Ramp-up Rate (Liquidus Temp (TL) to peak) 5°C/second max. TS(max) to TL - Ramp-up Rate 5°C/second max. Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 150 seconds Peak Temperature (TP) 260+0/-5 °C Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds Ramp-down Rate 5°C/second max. Time 25°C to peak Temperature (TP) 8 minutes max. Do not exceed 260°C Wave Soldering 260°C, 10 seconds max. tP TP tL Ramp-down TS(min) 25 7 Critical Zone TL to TP Ramp-up TL TS(max) Temperature Reflow Condition Preheat tS time to peak temperature (t 25ºC to peak) Time © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/08/21 Fuse Datasheet 437A Series 1206 Fast-Acting Ceramic Fuse Product Characteristics Body: Advanced Ceramic Terminations: Ag/Ni/Sn (100% Lead-free) Element Cover Coating: Lead-free Glass High Temperature Storage MIL-STD-202 Method 108 with exemptions Thermal Shock Test 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 to Solder MIL-STD-202, Method 210, Condition B Heat Resistance To Solvents MIL-STD-202 Method 215 Moisture Resistance MIL-STD-202, Method 106 Mechanical Shock MIL-STD-202 Method 213, Test Condition C Thermal Shock MIL-STD-202, Method 107, Condition B High Frequency Vibration MIL-STD-202, Method 204 Mechanical Shock MIL-STD-202, Method 213, Condition A Resistance To Soldering Heat MIL-STD-202 Method 210, Test Condition B Vibration MIL-STD-202, Method 201 Solderability JESD22-B102E Method 1 Vibration, High Frequency MIL-STD-202, Method 204, Condition D Terminal Strength For SMD AEC Q200-006 Dissolution of Metallization IPC/EIC/JEDEC J-STD-002, Condition D Board Flex AEC Q200-005 Terminal Strength IEC 60127-4 Electrical Characterization 3 Temperature Electrical Characterization Materials Moisture Sensitivity Level IPC/JEDEC J-STD-020, Level 1 Solderability IPC/EIC/JEDEC J-STD-002, Condition B Humidity Test MIL-STD-202, Method 103, Conditions D 1.000 [0.039] N 1.63 +0.10 / -0.2 [0.064 +0.004 / -0.008] Dimensions 3.200 ± 0.1778 [0.126 ± 0.007] 1.000 [0.039] 1.000 [0.039] N N N 1.63 +0.10 / -0.2 [0.064 +0.004 / -0.008] 1.63 +0.10 / -0.2 [0.064 +0.004 / -0.008] 1.63 +0.10 / -0.2 [0.064 +0.004 / -0.008] Part Marking System 3.200 ± 0.1778 [0.126 ± 0.007] 1.000 [0.039] 3.200 ± 0.1778 [0.126 ± 0.007] 3.200 ± 0.1778 [0.126 ± 0.007] Amp Code Marking Code .250 .375 .500 .750 001. 1.25 01.5 1.75 002. 02.5 003. 3.500 004. 005. 007. D E F G H J K L N O P R S T W 008. |X| 0.835 ± 0.15 [0.0329 ± 0.006] 2 0.835 ± 0.15 [0.0329 ± 0.006] 0.835 ± 0.15 [0.0329 ± 0.006] 0.835 ± 0.15 [0.0329 ± 0.006] 0.520 ± 0.200 [0.020 ± 0.008] 2 2 21.000 [0.039] 1.500 [0.059] 1.800 [0.071] 0.520 ± 0.200 [0.020 ± 0.008] 0.520 ± 0.200 [0.020 ± 0.008] 0.520 ± 0.200 [0.020 ± 1.000 0.008] 1.000 [0.039] 1.500 [0.059] [0.039] 1.000 [0.039] 3.500 [0.138] 1.500 [0.059] 1.500 [0.059] 1.800 [0.071] 1.800 [0.071] 1.800 [0.071] Packaging3.500 Option [0.138] 3.500 [0.138] 8mm Tape and Reel Packaging 3.500 Packaging Specification [0.138] Quantity Quantity and Packaging Code EIA-481, IEC 60286, Part 3 3000 WRA 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. 8 © 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/08/21