Surface Mount Fuses
Miniature Surface Mount
Telecom NANO
2®
Fuse
461 Series
and Teccor TeleLink
®
Fuse
TIA –968-A (formerly FCC Part 68) Surge Waveforms
(fuse can not open during type B events)
Voltage Waveform Current
(V)
(µs)
(A)
Metallic A
800
10 x 560
100
Longitudinal A
1500
10 x 160
200
Metallic B
1000
9 x 720
25
Longitudinal B
1500
9 x 720
37.5
Surge
Waveform
(µs)
10 x 560
10 x 160
5 x 320
5 x 320
Reps
1
1
1
1
ea. polarity
ea. polarity
ea. polarity
ea. polarity
Recommended
Fuse
1.25
1.25
1.25
1.25
®
®
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.
UL 60950 requirements
UL60950 (EN 60950) (formerly UL 1950) Power
Cross (L = longitudinal, M = metallic)
Test
Voltage
Number
(V)
L1
600
L2
600
L3
600
L4
200
L5
120
M1
600
M2
600
M3
600
M4
600
Current
(A)
40
7
2.2
2.2
25
40
7
2.2
2.2
Time
1.5 sec.
5 sec.
30 min.
30 min.
30 min.
1.5 sec.
5 sec.
30 min.
30 min.
Fuse
Choices
0.5, 1.25, 2.0
0.5, 1.25, 2.0
0.5, 1.25, 2.0
0.5, 1.25, 2.0
0.5, 1.25, 2.0
0.5, 1.25, 2.0
0.5, 1.25, 2.0
0.5, 1.25, 2.0
0.5, 1.25, 2.0
Selection of test number depends on current limiting & fire enclosure/spacing of
end product
• 26 AWG line cord removes L1/M1 test requirement
• L5 conducted only if product does not pass section 6.1.2
• L2,M2,L3,M3,L4,M4 conducted if not in a fire enclosure
Fuse must open before the wiring simulator fuse (MDL 2.0).
UL60950 (EN 60950) (formerly UL 1950)
Impulse Test & Steady-state electric strength test
Test
Impulse
For handheld units
Non handheld
Steady-State
For handheld units
Non handheld
Voltage Current
(V)
(A)
2500
1500
1500
1000
62.5
37.5
Waveform
Repetitions
Fuse
Choices
0.5, 1.25, 2.0
0.5, 1.25, 2.0
0.5, 1.25, 2.0
0.5, 1.25, 2.0
10
SURFACE MOUNT
FUSES
10 x 700µs + 10 w/60 sec. rest
10 x 700µs + 10 w/60 sec. rest
60Hz
60Hz
379
w w w. l i t t e l f u s e . c o m
LITTELFUSE [ LITTELFUSE ]
