Datasheet

Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
© 2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Axial Lead & Cartridge Fuses
473 Series
Please refer to www.littelfuse.com/series/473.html for current information.
PICO
®
ll > Slo-Blo
®
> 473 Series
Average Time Current Curves
1000
100
10
1
0.1
0.01
10001001010.1
.375A .50A .75A 1.0A 1.5A 2.0A 2.5A 3.0A 3.5A 4.0A 5.0A 7.0A
TIME IN SECONDS
CURRENT IN AMPERES
Temperature Rerating Curve
Soldering Parameters
Wave Parameter Lead-Free Recommendation
Preheat:
%FQFOETPO'MVY"DUJWBUJPO5FNQFSBUVSF
5ZQJDBM*OEVTUSZ3FDPNNFOEBUJPO
5FNQFSBUVSF.JOJNVN
100
° C
5FNQFSBUVSF.BYJNVN
150
° C
1SFIFBU5JNF 60-180 seconds
Solder Pot Temperature:
260
° $.BYJNVN
Solder Dwell Time: 2-5 seconds
Recommended Hand-Solder Parameters:
4PMEFS*SPO5FNQFSBUVSF¡$¡$
)FBUJOH5JNFTFDPOETNBY
Note: These devices are not recommended for IR or
Convection Reflow process.
Recommended Process Parameters:
/PUF
 %FSBUJOHEFQJDUFEJOUIJTDVSWFJTJOBEEJUJPOUPUIFTUBOEBSEEFSBUJOHPGGPS
continuous operation.