Littelfuse 977 Series - Manual (Page 2)

Introduction to Circuit Protection Introduction to Circuit Protection
Transientology
2
© 2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Axial Lead and Cartridge Fuses
5x20mm > Time-Lag > 977 Series
977 Series
Please refer to www.littelfuse.com/series/977.html for current information.
Average Time Current Curves Temperature Rerating Curve
0.001
0.01
0.1
1
10
100
1000
10000
0.01 0.1 1
977.500
10 100 1000
9773.15 977.800 977002 977008 97706.3 977005 977004 977010 977012 977016
Current in Amperes
T
ime 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
"
!
7BD
"
!
7ED
 0.3 x
  500 450   x
002. 2 500 450 44.5  x x
  500 450   x x
004. 4 500 450   x x
005. 5 500 450   x x
  500 450   x x
  500 450  233 x x
  500 450   x
  500 450   x

  500 450   x
Electrical Characteristic
PS
E
I 2 U
UFTU
BU
Y
SBUFE
DVSSFOU