Axial Lead & Cartridge Fuses
PICO® ll > Very Fast-Acting > 251/253 Series
Temperature Rerating Curve
AverageTime Current Curves
100
10
1
0.1
Note:
1. Rerating depicted in this curve is in addition to the standard rerating of 25% for
continuous operation.
0.01
Soldering Parameters
0.001
0.05 0.1
1
10
100
1000
Recommended Process Parameters:
CURRENT IN AMPERES
Wave Parameter
Preheat:
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Temperature Minimum:
Temperature Maximum:
PreheatTime:
Lead-Free Recommendation
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100° C
150° C
60-180 seconds
Solder PotTemperature:
Solder DwellTime:
260° C Maximum
2-5 seconds
Recommended Hand Soldering Parameters:
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HeatingTime: 5 seconds max.
Note:These devices are not recommended for IR or
Convection Reflow process
© 2012 Littelfuse, Inc.
251/253 Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/251.html
or /253.html for current information.
LITTELFUSE [ LITTELFUSE ]
