Surface Mount Fuses Ceramic Chip Fuse > 400M Series RoHS Pb 400M Series - 0603 Low Resistance Fast Acting Fuse Description The 400M Series is an 0603 Fast Acting fuse which offers relatively low resistance best suited for application which requires such. The part is 100% Lead-free, RoHS compliant, and Halogen-free fuses designed to provide over-current protection to circuits that operate under high operating temperatures of up to 150C. Features Operating temperature Suitable for both leaded from -55C to 150C and lead-free soldering 100% Lead-free, RoHS compliant, and Electrical Characteristics Halogenfree % of Ampere Rating Opening Time at 25C Applications 100% 4 Hours Minimum 200% 5 Seconds Maximum Burn-in Test Additional Information Datasheet Samples Resources Electrical Specifications by Item Nominal Voltage Nominal Power Max. Voltage Nominal Nominal Ampere Rating Interrupting Drop at Rated Dissipation at 2 Amp Code Rating Resistance Melting I t (A) Rating Current Rated Current 2 (V) (Ohms) (A Sec.) (mV) (W) 0.5 0025 5 0.325 0.00169 189 0.095 50A 5VDC 1.5 0026 5 0.095 0.03 161 0.242 Notes: 1. Cold resistance measured at less than 10% of rated current at 23C. 2 2. I t values stated for 1msec opening time. 2019 Littelfuse, Inc. Specifications are subject to change without notice. Application testing is strongly recommended.Specifications are subject to change without notice. Revised: 06/19/19 PRELIMINARYSurface Mount Fuses Ceramic Chip Fuse > 400M Series Temperature Re-rating Curve Average Time Current Curves 100 140 120 10 100 80 1 60 40 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (C) 0.1 Note: Re-rating depicted in this curve is in addition to the standard re-rating of 20% for 0.01 continuous operation. 0.001 0.1 1 10 CURRENT IN AMPERES (A) Soldering Parameters t P Reflow Condition Pb free assembly T P Critical Zone Ramp-up T to T L P - Temperature Min (T ) 150C s(min) T L Pre Heat - Temperature Max (T ) 200C t s(max) L T S(max) - Time (Min to Max) (t ) 60 180 seconds s Ramp-down Average Ramp-up Rate (Liquidus Temp Preheat 5C/second max. T (T ) to peak) S(min) L t S T to T - Ramp-up Rate 5C/second max. S(max) L - Temperature (T ) (Liquidus) 217C L 25 Reflow time to peak temperature - Temperature (t ) 60 150 seconds Time L (t 25C to peak) +0/-5 Peak Temperature (T ) 260 C P Time within 5C of actual peak 20 40 seconds Temperature (t ) p Ramp-down Rate 5C/second max. Time 25C to peak Temperature (T ) 8 minutes max. P Do not exceed 260C 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/19/19 PRELIMINARY PERCENT OF RATING OPENING TIME (SEC) 0.500A 1.50A Temperature