Littelfuse 461 Series - Manual (Page 2)

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Surface Mount Fuses
Surge Resistant > 461 Series TeleLink ® Fuse
Electrical Specifications by Item
Ampere
Rating
(A)
Amp Code
max
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance (Ohms)
Nominal melting
I 2 t (A 2 sec)
Agency Approvals
0.500 .500 600
60 A @600 VAC
100 A @80 VDC
0.560 0.840 1 x x
1.25 1.25 600 0.110 16.5 1 x x
2.00 002. 600 0.050 17.5 1 x x
1 I 2 t is calculated at 10 msecs. or less. I 2 t at 10 times rated current has a typical value of: 24 A 2 sec (2.0A), 22 A 2 sec (1.25A), 1.3 A 2 sec (0.5A).
• Typical inductance <40nH up to 500 MHz.
• Resistance changes 0.5% for every °C.
• Resistance is measured at 10% rated current.
GR 1089 Inter-building requirements
GR 1089 1st level lighting surge inter-building
(Equipment under test can not be damaged and must
continue to operate properly)
Surge
minimum
peak
Voltage
(V)
minimum
peak
Current
(A)
max.
Rise/min.
Decay
(µs)
Repetitions
each
polarity
Fuse
Choices
1 600 100 10/1000 25 1.25, 2.0
2 1000 100 10/360 25 1.25, 2.0
3 1000 100 10/1000 25 1.25, 2.0
4 2500 500 2/10 10 1.25, 2.0
5 1000 25 10/360 5 0.5, 1.25, 2.0
GR 1089 2nd level lightning surge telecom port
(Equipment under test shall not become a fire or
electrical safety hazard)
Surge
minimum
peak
Voltage
(V)
minimum
peak
Current (A)
max.
Rise/min.
Decay
(µs)
Repe-
titions
each
polarity
Fuse
Choices
1 5000 500 2/10 1 0.5, 1.25, 2.0
Alter-
native
5000 500/8=625 8/10 1 0.5, 1.25, 2.0
If sufficient series resistance is used, then the 0.5 fuse may be used in test conditions 1-4.
The 0.5 fuse will open during these test conditions. The 1.25 & 2.0 will not open thus
providing operational compliance.
Average Time Current Curves
1000 100 10 1 0.1
0.001
0.01
0.1
1
10
100
CURRENT IN AMPERES
TIME IN SECONDS
1.25A 2A .500A
Temperature Rerating Curve
Note:
1. Rerating depicted in this curve is in addition to the standard rerating of 25% for
continuous operation.