Surface Mount Fuses Ceramic Fuse > 438A Series 438A Series - 0603 Fast-Acting Fuse RoHS Pb Description The 438A series AECQ-compliant fuses are specifically tested to cater secondary circuit protection needs of compact auto electronics application. The general design ensures excellent temperature stability and performance reliability. The high It values which is typical in the Littelfuse ceramic fuse family ensure high inrush current withstand capability. Features Agency Approvals Agency Agency File Number Ampere Range E10480 0.25A - 6A 29862 0.25A - 6A * Operating Temperature from -55C to +150C * Meets Littelfuse's Automotive qualifications* * 100% Lead-free, RoHS compliant and Halogenfree * Recognized to UL/CSA/ NMX 248-1 and UL/CSA/ NMX 248-14 * Suitable for both leaded and lead-free reflow/wave soldering * Largely based on Littelfuse internal AECQ-200 test plan. Applications Electrical Characteristics for Series % of Ampere Rating Ampere Rating Opening Time at 25C 100% 0.250A - 6A 4 Hours, Minimum 250% 0.250A - 6A 5 Seconds, Maximum * Li-ion Battery * TFT Display * LED Head-Lights * Battery Management System (BMS) * Automotive Navigation System *Clusters Additional Information Datasheet Resources Samples Electrical Specifications by Item Ampere Rating (A) Amp Code Max. Voltage Rating (V) Interrupting Rating (AC/DC)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 0.25 .250 63VDC 2.218 0.0017 0.550 0.138 x 0.375 .375 63VDC 1.247 0.0041 0.488 0.183 x x 0.5 .500 63VDC 0.829 0.0100 0.486 0.243 x x 0.75 .750 63VDC 1 001. 63VDC 1.25 1.25 63VDC 1.75 1.75 32VDC 2 002. 32 50A @ 63VDC 50A @ 32VAC 50A@32VAC/32VDC x 0.466 0.0281 0.378 0.284 x x 0.310 0.0593 0.351 0.351 x x x 0.200 0.0510 0.365 0.456 x 0.1405 0.1440 0.360 0.540 x x 0.0490 0.181 0.107 0.214 x x 2.5 02.5 32 0.0364 0.240 0.095 0.238 x x 3 003. 32 0.0264 0.439 0.093 0.279 x x 3.5 03.5 32 4 004. 32 5 005. 32 6 006. 24 50A @ 32VDC/12VAC 50A @ 24VDC/12VAC 0.0210 0.647 0.082 0.287 x x 0.0177 0.730 0.079 0.316 x x 0.0127 0.747 0.074 0.370 x x 0.0086 1.444 0.072 0.432 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 It 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. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/11/19 Surface Mount Fuses Ceramic Fuse > 438A Series 1.75A 2A 2.5A 3A 3.5A 4A 5A 6A 120 100 10 80 60 40 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (C) TIME IN SECONDS PERCENT OF RATING 100 .750A 1A 1.25A 140 .250A Average Time Current Curves .375A .500A Temperature Re-rating Curve 1 0.1 Note: 1. Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. Example: For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: I = (0.80)(0.85)IRAT = (0.68)IRAT 0.01 0.001 0.1 1 10 100 CURRENT IN AMPERES Soldering Parameters Pb - free assembly Pre Heat - Temperature Min (Ts(min)) 150C - Temperature Max (Ts(max)) 200C - Time (Min to Max) (ts) 60 - 180 seconds Average Ramp-up Rate (Liquidus Temp (TL) to peak) 3C/second max. TS(max) to TL - Ramp-up Rate 5C/second max. Reflow - Temperature (TL) (Liquidus) 217C - Temperature (tL) 60 - 150 seconds Peak Temperature (TP) 260+0/-5 C Time within 5C of actual peak Temperature (tp) 10 - 30 seconds Ramp-down Rate 6C/second max. Time 25C to peak Temperature (TP) 8 minutes max. Do not exceed 260C Wave Soldering tP TP Critical Zone TL to TP Ramp-up Temperature Reflow Condition TL T S(max) tL Ramp-down T S(min) Preheat tS 25 time to peak temperature (t 25C to peak) Time 260C, 10 seconds max. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/11/19 Surface Mount Fuses Ceramic Fuse > 438A Series Product Characteristics Moisture Sensitivity Level Body: Advanced Ceramic Terminations: Ag/Ni/Sn (100% Lead-free) Element Cover Coating: Lead-free Glass IPC/JEDEC J-STD-020, Level 1 Solderability IPC/EIC/JEDEC J-STD-002, Condition C Biased Humidity Humidity Test MIL-STD-202, Method 103, Conditions D Operational Life MIL-STD-202 Method 108 with exemptions JESD22 Method JA-104, Test Conditions B and N MIL-STD-202 Method 103, 85C/85% RH with 10% operating power for 1000 hrs MIL-STD-202 Method 108, Test Condition D Resistance to Solder Heat MIL-STD-202, Method 210, Condition B 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 MIL-STD-202, Method 204 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 High Frequency Vibration Resistance To Soldering Heat Solderability Dissolution of Metallization IPC/EIC/JEDEC J-STD-002, Condition D Terminal Strength For SMD AEC Q200-006 Terminal Strength IEC 60127-4 Board Flex AEC Q200-005 Electrical Characterization 3 Temperature Electrical Characterization Materials Dimensions High Temperature Storage Thermal Shock Test MIL-STD-202 Method 210, Test Condition B JESD22-B102E Method 1 Part Marking System 1.5750.152 [0.062 0.006] 0.85 0.150 [0.033 0.006] 0.530 +/- 0.150 [0.021 +/- 0.006] 0.5080.102 [0.020.004] Amp Code Marking Code .250 D .375 E .500 F .750 G 001. H 1.25 J 1.75 L 002. N 02.5 O 003. P 03.5 R 004. S 005. T 006. U Part Numbering System 0.432 +/- 0.150 [0.017 +/- 0.006] 0438 0.60 [0.024] 0.74 [0.029] 005. W R A AEC-Q200 Qualified Series Packing Code Amp Code 1.00 [0.039] R = Reel Pack Quantity Code 1.94 [0.076] Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA-481, IEC 60286, Part 3 3000 WR 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. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/11/19