Fuse Mounting Accessories Page 95 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Surface Mount Fuses NANO 2 > 157 Fuse and Holder Combination Average Time Current Curves Reflow Condition Pb - Free assembly Pre Heat - Temperature Min (T s(min) ) 150C - Temperature Max (T s(max) ) 200C - Time (Min to Max) (t s ) 60 - 120 secs Average ramp up rate (Liquidus Temp (T L ) to peak 5C/second max. T S(max) to T L - Ramp-up Rate 5C/second max. Reflow - Temperature (T L ) (Liquidus) 217C - Temperature (t L ) 60 - 90 seconds Peak Temperature (T P ) 260 +0/-5 C Time within 5C of actual peak Temperature (t p ) 20 - 40 seconds Ramp-down Rate 5C/second max. Time 25C to peak Temperature (T P ) 8 minutes max. Do not exceed 260C Soldering Parameters Temperature Re-rating Curve 0.001 0.01 0.1 1 10 100 0.01 0.1 1 10 100 1000 10000 TIME IN SECONDS CURRENT IN AMPS 8A 10A 5A 6.3A 7A 3.5A 3.15A 3A 4A 2.5A 2A 1.5A 1.25A 1A 800mA 750mA 630mA 500mA 375mA 400mA 315mA 250mA 200mA 100mA 125mA 160mA 80mA 62mA 1.6A Note: 1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. Time Temperature T P T L T S(max) T S(min) 25 t P t L t S time to peak temperature (t 25C to peak) Ramp-down Ramp-up Preheat Critical Zone T L to T P

Previous Page
Next Page