Fuse Mounting Accessories Page 124 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Radial Lead Fuses TR3 > Fast-Acting Fuse > 303 Series 0.001 0.01 0.1 1 10 100 1000 0.01 0.1 1 10 100 1000 TIME IN SECONDS CURRENT IN AMPERES 0.800A 0.050A 0.063A 0.080A 0.125A 0.160A 0.200A 0.250A 0.500A 1A 1.25A 1.60A 2A 2.50A 3A 3.15A 4A 5A 0.315A 0.400A 0.630A 0.100A Average Time Current Curves Temperature Re-rating Curve Soldering Parameters - Wave Soldering Dwell Time 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 Time (Seconds) Temperature (C) - Measured on bottom side of board Cooling Time Preheat Time Wave Parameter Lead-Free Recommendation Preheat: (Depends on Flux Activation Temperature) (Typical Industry Recommendation) Temperature Minimum: 100C Temperature Maximum: 150C Preheat Time: 60-180 seconds Solder Pot Temperature: 260C Maximum Solder Dwell Time: 2-5 seconds Recommended Hand-Solder Parameters: Solder Iron Temperature: 350C +/- 5C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Recommended Process Parameters: 0 20 40 60 80 100 120 140 -40 -20 0 20 40 60 80 AMBIENT TEMPERATURE (C) PERCENT OF RATING 23C Note 1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation.

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