Brochure

© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Axial Lead & Cartridge Fuses
5×20mm > Time-Lag > 977 Series
Average Time Current CurvesTemperature Re-rating Curve
0.001
0.01
0.1
1
10
100
1000
10000
0.01 0.11
977.500
10 100 1000
9773.15
977.800
977002 977008
97706.3
977005 977004 977010 977012 977016
Current in Amperes
Time in Seconds
Amp Code Amp Rating
Voltage Rating
Interrupting
Rating
Nominal Cold
Resistance
(milli-ohms)
Nominal
Melting
I
2
t (A
2
sec.)
Agency Approvals
AC
DC
.500 0.5 500 450
100A @ 500Vac
200A @ 450Vdc
945.0 0.3 x
.800 0.8 500 450 417.0 0.8 x
002. 2 500 450 44.5 17 x x
3.15 3.15 500 450 27.5 58 x x
004. 4 500 450 18.4 124 x x
005. 5 500 450 11. 9 91 x x
06.3 6.3 500 450 9.1 188 x x
008. 8 500 450 8.0 233 x x
010. 10 500 450 7. 2 249 x
012. 12 500 450 5.8 388 x
016. 16 500 450 3.9 725 x
Electrical Characteristic
PS
E
I
2
t test at 10x rated current.
Note:
Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.