Littelfuse 461 Series - Manual (Page 3)

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Surface Mount Fuses
Surge Resistant > 461 Series TeleLink ® Fuse
GR 1089 AC power fault 2nd level (fuse can open but
must open in a safe and controlled manner)
Test Vrms
Short
Circuit
Current
(A)
Hits Duration
primary
protector
Fuse
Choices
1 50 0.33 1 15 min. removed 1.25, 2.0
2 100 0.17 1 15 min. removed 1.25, 2.0
3 200,400,
600
1 60 1 sec. removed 1.25, 2.0
4 1000 1 60 1 sec. operative 1.25, 2.0
5 Diagram Diagram 60 5 secs. removed 1.25, 2.0
6 600 0.5 1 30 secs. removed 1.25, 2.0
7 440 2.2 5 2 secs. removed 1.25, 2.0
8 600 3 1 1.1 secs. removed 1.25, 2.0
9 1000 5 1 0.4 sec. in place 1.25, 2.0
Test
Circuit
Vrms
Short
Circuit
Current
(A)
Duration Fuse
1 120,277 25 15 min. 0.5, 1.25, 2.0
2 600 60 5 secs. 0.5, 1.25, 2.0
3 600 7 5 secs. 0.5, 1.25, 2.0
4 100-600 2.2 15 min.. 0.5, 1.25, 2.0
5 Diagram Diagram 15 min. 0.5, 1.25, 2.0
Fuse must open before wiring simulator fuse (MDL 2.0).
Surge Voltage (V) Waveform (µs) Current (A) Repetitions 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
TIA –968-A (formerly FCC Part 68) Surge Waveforms (fuse can not open during type B events)
UL 60950 requirements
UL60950 (EN 60950) (formerly UL 1950) Power Cross (L
= longitudinal, M = metallic)
Test
Number
Voltage (V) Current (A) Time
Fuse
Choices
L1 600 40 1.5 secs. 0.5, 1.25, 2.0
L2 600 7 5 secs. 0.5, 1.25, 2.0
L3 600 2.2 30 min. 0.5, 1.25, 2.0
L4 200 2.2 30 min. 0.5, 1.25, 2.0
L5 120 25 30 min. 0.5, 1.25, 2.0
M1 600 40 1.5 secs. 0.5, 1.25, 2.0
M2 600 7 5 secs. 0.5, 1.25, 2.0
M3 600 2.2 30 min. 0.5, 1.25, 2.0
M4 600 2.2 30 min. 0.5, 1.25, 2.0
Selection of test number depends on current limiting F 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 and Steady-State Electric Strength Test
Test Voltage (V) Current (A) Waveform Repetitions Fuse Choices
Impulse
For handheld units 2500 62.5 10×700ms +/- 10 w/60 secs. rest 0.5, 1.25, 2.0
Non handheld 1500 37.5 10×700ms +/- 10 w/60 secs. rest 0.5, 1.25, 2.0
Steady-State
For handheld units 1500 60Hz 0.5, 1.25, 2.0
Non handheld 1000 60Hz 0.5, 1.25, 2.0
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.
L F 1.25A T
3.12
(.123")
3.12
(.123")
10.10
(.397")
3.25
(.128")
3.43
(.135")
12.6
(.496")
6.10
(.240")
Recommended Pad Layout
1.70 typ
(.067")
Dimensions
GR 1089 AC power fault 1st level inter-building (fuse
not allowed to open)