Littelfuse LFT User Manual
POWR-GARD® Blocks and Holders Datasheet
LF SerieS cLaSS T FuSe bLockS
300 V • 600 V
Specifications
Voltage Ratings 300 VAC/600 VAC
Ampere Ratings 0 – 600 A
Leakage Current <0.6 mA at 600 V
Withstand Rating 200 kA RMS SYM
Flammability Rating UL94 V-0
Approvals UL Listed (File: E14721)
CSA Certified (File: LR7316)
Environmental RoHS Compliant, Lead (Pb) Free
Description
The Littelfuse Class T fuse blocks offer many advantages
such as space saving design, universal mounting holes,
snap-to-release DIN rail mounts and available covers.
Features/Benefits
• Space-saving design
• Universal mounting holes for easy replacement
• One hand release from DIN rail for 30–60 A fuses
• Reinforced fuse clips are standard
• Covers available for most amperages to enhance safety
Recommended Fuses
300 V JLLN
600 V JLLS
Web Resources
Sample requests, downloadable CAD drawings and other
technical information:
Littelfuse.com/lft
Littelfuse.com/fuseblocks
Ordering Information
(Class T 300 V)
ordering number
poLeS TerminaL SuFFix
box
1 2 3
Lug
preS Sure
pLaTe
(Class T 600 V)
Torque
ScreW
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs)
4.5 N-m (40 in-lbs)
4.0 N-m (35 in-lbs)
ordering
raTing
number
baSe
amp
30 LFT30030 1 2 3 C — —
60 LFT30060 1 2 3 C — —
100 LFT30100 1 — 3 CS — —
200 LFT30200 1 — 3 CS — — 31.1 N-m (275 in-lbs) 250 kcmil-6 —
400 LFT30400 1 — 3 CS — — (2) 31.1 N-m (275 in-lbs) 250 kcmil-6 —
600 LFT30600 1 — 3 CS — — (2) 42.4 N-m (375 in-lbs) 500 kcmil-6 —
Ordering Information
Wire
range
2-4 AWG
6-14 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
Wire
Type
CU-AL
raTing
baSe Temp
125˚C •
Solid/Stranded
130˚C
—
mounT
din raiL
ordering
number*
LFT30030FBC
LFT30060FBC
LF T30100FBC
ordering number
poLeS TerminaL SuFFix
box
1 2 3
Lug
preS Sure
pLaTe
Torque
ScreW
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs)
4.5 N-m (40 in-lbs)
4.0 N-m (35 in-lbs)
ordering
raTing
number
baSe
amp
30 LFT60030 1 2 3 C P S
60 LFT60060 1 2 3 C — —
100 LFT60100 1 — 3 CS — —
200 LFT60200 1 — 3 CS — — 31.1 N-m (275 in-lbs) 250 kcmil-6 LT60200FBC
400 LFT60400 1 — 3 CS — — (2) 31.1 N-m (275 in-lbs) 250 kcmil-6 LT604 00FBC
600 LFT60600 1 — 3 CS — — (2) 42.4 N-m (375 in-lbs) 500 kcmil-6 LT60600FBC
* Covers sold individually. One cover needed for each pole.
†
Wire Type for Pressure Plate and Screw Terminal is CU only
Wire
range
2-4 AWG
6-14 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
Wire
Type
†
see
note
CU-AL
Solid/Stranded
raTing
baSe Temp
125˚C •
130˚C —
mounT
din raiL
ordering
number*
LFT60030FBC
LFT60060FBC
LT60100F BC
coVer
coVer
Littelfuse.com
1 of 5
© 2013 Littelfuse POWR-GARD® Products
Rev: 011513
POWR-GARD® Blocks and Holders Datasheet
LF SerieS cLaSS T FuSe bLockS
Dimensions mm (inches)
300 V 30 A
300 V 60 A
16.4 [.65]
8.2 [.32]
73.7
[2.90]
36.8
[1.45]
71.1
[2.80]
15.0 [.59]
6.9 [.27]
3.7 [.15]
35.6
[1.40]
24.6 [.97]
21.8 [.86]
Ø4.5 [.18]
TYP.
Ø4.5 [.18]
TYP.
25.9 [1.02]
30.5 [1.20]
40.9 [1.61]
46.9 [1.85]
59.9 [2.36]
44.9 [1.77]
69.1 [2.72]
52.7 [2.07]
35.6 [1.40]
41.9 [1.65]
300 V 100 A
Littelfuse.com
4.5 [.18]
133.4
[5.25]
34.8 [1.37]
26.9 [1.06]
17.4 [.69]
7.9 [.31]
9.5 [.38]
66.7
[2.63]
Ø.2 THRU
Ø.4 .5
Ø.2 THRU
Ø.5 .4
26.0 [1.03]
17.4 [.69]
7.9 [.31]
42.8 [1.69]
2 of 5
104.6 [4.12]
Ø.2 THRU
Ø.4 .5
R3.2 [.13]
TYP.
47.6 [1.88]
15.9 [.63]
© 2013 Littelfuse POWR-GARD® Products
Rev: 011513
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