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0469002.WR Datasheet(PDF) 2 Page - Littelfuse |
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0469002.WR Datasheet(HTML) 2 Page - Littelfuse |
2 / 4 page Introduction to Circuit Protection Introduction to Circuit Protection Transientology © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/469.html for current information. Surface Mount Fuses 469 Series Ceramic Fuse > 469 Series Average Time Current Curves 0.001 0.01 0.1 1 10 100 1 10 100 1000 CURRENT IN AMPERES Reflow Condition Pre Heat -Temperature Min (T s(min)) 150°C -Temperature Max (T s(max)) 200°C -Time (Min to Max) (t s) 60 – 180 seconds Average Ramp-up Rate (LiquidusTemp (T L) to peak) 3°C/second max. T S(max) to TL - Ramp-up Rate 5°C/second max. Reflow -Temperature (T L) (Liquidus) 217°C -Temperature (t L) 60 – 150 seconds PeakTemperature (T P) 260+0/-5 °C Time within 5°C of actual peak Temperature (t p) 10 – 30 seconds Ramp-down Rate 6°C/second max. Time 25°C to peakTemperature (T P) 8 minutes max. Do not exceed 260°C Soldering Parameters Temperature Rerating Curve 40 60 80 100 120 140 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (°C) Time TP TL TS(max) TS(min) 25 tP tL tS time to peak temperature (t 25ºC to peak) Ramp-down Ramp-up Preheat Critical Zone TL to TP I = (0.80)(0.85)I RAT = (0.68)IRAT 1. Rerating depicted in this curve is in addition to the standard rerating of 20% for continuous operation. Wave Soldering 260°C, 10 seconds max. |
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