Axial Lead & Cartridge Fuses
PICO
®
ll > Very Fast-Acting > 251/253 Series
Temperature Rerating Curve
Average Time Current Curves
.250A
.375A
.500A
.630A
.750A
1A
1.25A
1.5A
2A
2.5A
3A
3.5A
4A
5A
7A
10A
12A
15A
1
10
CURRENT IN AMPERES
100
.062A
100
10
TIME IN SECONDS
1
0.1
.125A
Note:
1. Rerating depicted in this curve is in addition to the standard rerating of 25% for
continuous operation.
0.01
Soldering Parameters
Recommended Process Parameters:
Wave Parameter
Preheat:
Temperature Minimum:
Temperature Maximum:
Preheat Time:
Solder Pot Temperature:
Solder Dwell Time:
100
°
C
150
°
C
60-180 seconds
260
°
C Maximum
2-5 seconds
Lead-Free Recommendation
0.001
0.05 0.1
1000
Recommended Hand Soldering Parameters:
Heating Time: 5 seconds max.
Note: These devices are not recommended for IR or
Convection Reflow process
© 2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/251.html
or /253.html for current information.
251/253 Series
251/253 Series
LITTELFUSE [ LITTELFUSE ]
