Surface mount fuses, 159 fuse and clip series – Littelfuse 159 Series User Manual
Page 2
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Surface Mount Fuses
159 Fuse and Clip Series
Average Time Current Curves
Temperature Rerating Curve
Maximum Temperature Rise
Telecom Nano
2®
Fuse
Opening Time
04611.25
≤82
o
C (180
o
F)
046002
≤50
o
C (122
o
F)
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
0.50
.500
600
60 A @600 VAC
0.560
0.840
1
x
1.25
1.25
600
0.110
16.5
1
x
2.00
002.
600
0.050
17.5
1
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.
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
TIA-968-A (formerly FCC part 68) Surge Waveforms
Surge
Voltage (V)
Waveform (µs)
Current (A)
Repititions
Recommended Fuse
Metallic A
800
10×560
100
1 ea. polarity
1.25
Longitudinal A
1500
10×160
200
1 ea. polarity
1.25
Metallic B
1000
9×720
25
1 ea. polarity
1.25
Longitudinal B
1500
9×720
37.5
1 ea. polarity
1.25
(fuse can not open during type B events)
For the type A events the 0.5 fuse will open, providing non-operational compliance. The 1.25 & 2.0 will
not open, providing for operational compliance with TIA-968-A type A surge events.
Note:
1. Rerating depicted in this curve is in addition to the standard rerating of 25% for
continuous operation.