POWR-GARD® Blocks and Holders Datasheet
littelfuse.com/lft 1 of 5 © 2018 Littelfuse POWR-GARD® Products
Rev: 4-A-121818
LF SERIES CLASS T FUSE BLOCKS
300 V • 600 V
Specifications
Voltage Ratings 300 V/600 V
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
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
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
* Covers sold individually. One cover needed for each pole.
† Wire Type for Pressure Plate and Screw Terminal is CU only
Ordering Information
(Class T 600 V)
AMP
RATING
ORDERING NUMBER
TORQUE WIRE
RANGE
WIRE
TYPE
BASE TEMP
RATING
DIN RAIL
MOUNT
COVER
ORDERING
NUMBER*
BASE
ORDERING
NUMBER
POLES TERMINAL SUFFIX
123BOX
LUG
PRES SURE
PLATE SCREW
30 LFT60030 1 2 3 C P S 5.6 N-m (50 in-lbs) 2-4 AWG † see
note
Solid/Stranded
125˚C • LFT60030FBC
2.8 N-m (25 in-lbs) 6-14 AWG
60 LFT60060 1 2 3 C — — 5.6 N-m (50 in-lbs) 2-4 AWG
CU-AL
125˚C • LFT60060FBC
2.8 N-m (25 in-lbs) 6-14 AWG
100 LFT60100 1 — 3 CS — —
13.6 N-m (120 in-lbs) 2/0-6 AWG
130˚C — LT60100FBC4.5 N-m (40 in-lbs) 8 AWG
4.0 N-m (35 in-lbs) 10-14 AWG
200 LFT60200 1 — 3 CS — — 31.1 N-m (275 in-lbs) 250 kcmil-6 130˚C — LT60200FBC
400 LFT60400 1 — 3 CS — — (2) 31.1 N-m (275 in-lbs) 250 kcmil-6 130˚C — LT60400FBC
600 LFT60600 1 — 3 CS — — (2) 42.4 N-m (375 in-lbs) 500 kcmil-6 130˚C — LT60600FBC
Ordering Information
(Class T 300 V)
AMP
RATING
ORDERING NUMBER
TORQUE WIRE
RANGE
WIRE
TYPE
BASE TEMP
RATING
DIN RAIL
MOUNT
COVER
ORDERING
NUMBER*
BASE
ORDERING
NUMBER
POLES TERMINAL SUFFIX
1 2 3 BOX
LUG
PRES SURE
PLATE SCREW
30 LFT30030 1 2 3 C — — 5.6 N-m (50 in-lbs) 2-4 AWG
CU-AL
Solid/Stranded
125˚C • LFT30030FBC
2.8 N-m (25 in-lbs) 6-14 AWG
60 LFT30060 1 2 3 C — — 5.6 N-m (50 in-lbs) 2-4 AWG 125˚C • LFT30060FBC
2.8 N-m (25 in-lbs) 6-14 AWG
100 LFT30100 1 — 3 CS — —
13.6 N-m (120 in-lbs) 2/0-6 AWG
130˚C —LFT30100FBC4.5 N-m (40 in-lbs) 8 AWG
4.0 N-m (35 in-lbs) 10-14 AWG
200 LFT30200 1 — 3 CS — — 31.1 N-m (275 in-lbs) 250 kcmil-6 130˚C ——
400 LFT30400 1 — 3 CS — — (2) 31.1 N-m (275 in-lbs) 250 kcmil-6 130˚C ——
600 LFT30600 1 — 3 CS — — (2) 42.4 N-m (375 in-lbs) 500 kcmil-6 130˚C ——
POWR-GARD® Blocks and Holders Datasheet
littelfuse.com/lft 2 of 5 © 2018 Littelfuse POWR-GARD® Products
Rev: 4-A-121818
LF SERIES CLASS T FUSE BLOCKS
Dimensions mm (inches)
21.8 [.86]
71.1
[2.80]
3.7 [.15]
TYP.
35.6
[1.40]
6.9 [.27]
40.9 [1.61]
15.0 [.59]
25.9 [1.02] 44.9 [1.77]
59.9 [2.36] 35.6 [1.40]
Ø4.5 [.18]
300 V 30 A
73.7
[2.90]
4.5 [.18]
24.6 [.97]
36.8
[1.45]
8.2 [.32]
16.4 [.65]
46.9 [1.85]
30.5 [1.20]
69.1 [2.72]
52.7 [2.07]
41.9 [1.65]
Ø4.5 [.18]
TYP.
34.8 [1.37]
133.4
[5.25]
7.9 [.31]
17.4 [.69]
66.7
[2.63]
104.6 [4.12]
R3.2 [.13]
TYP.
17.4 [.69] 15.9 [.63]
47.6 [1.88]
7.9 [.31]
9.5 [.38]
26.9 [1.06]
26.0 [1.03]
42.8 [1.69]
Ø.2 THRU
Ø.4 .5
Ø.2 THRU
Ø.4 .5
Ø.2 THRU
Ø.5 .4
300 V 60 A
300 V 100 A
POWR-GARD® Blocks and Holders Datasheet
littelfuse.com/lft 3 of 5 © 2018 Littelfuse POWR-GARD® Products
Rev: 4-A-121818
38.1 [1.50]
177.8
[7.00]
19.1 [.75]
9.5 [.38]
114.3 [4.50]
R3.6 [.14]
TYP.
15.9 [.63]
57.2 [2.25]
168.3
[6.63]
88.9
[3.50]
9.5 [.38]
22.2 [.88]
92.1 [3.63]
Ø.3 THRU
Ø.5 .5
206.2
[8.12]
57.2 [2.25]
9.5 [.38]
28.6 [1.13]
171.5 [6.75]
15.9 [.63]
60.6 [2.38]
12.7 [.50]
103.1
[4.06]
85.7 [3.38]
127.0 [5.00]
Ø.3 THRU
Ø.5 .5
Ø.3 THRU
Ø.6 .5
LF SERIES CLASS T FUSE BLOCKS
Dimensions mm (inches)
222.3
[8.75]
69.9 [2.75]
8.8 [.35]
9.5 [.38]
209.6 [8.25]
60.3 [2.38]
15.9 [.63]
74.4 [2.93]
213.5
[8.41]
60.3 [2.38]
54.0 [2.13]
79.4 [3.13]
111.1
[4.38]
Ø.3 THRU
Ø.8 .5
Ø.3 THRU
Ø.5 .5
300 V 200 A
300 V 400 A
300 V 600 A
POWR-GARD® Blocks and Holders Datasheet
littelfuse.com/lft 4 of 5 © 2018 Littelfuse POWR-GARD® Products
Rev: 4-A-121818
LF SERIES CLASS T FUSE BLOCKS
Dimensions mm (inches)
39.9 [1.57]
72.3
[2.85]
3.7 [.15]
9.5 [.38]
36.2
[1.42]
76.1 [3.00]
45.7 [1.80]
112.3 [4.42]
81.9 [3.23]
54.0 [2.13]
89.7
[3.53]
7.6 [.30]
24.6 [.97]
17.0 [.67]
R2.9 [.11]
TYP.
46.9 [1.85]
29.8 [1.17]
44.8
[1.77]
69.1 [2.72] 41.9 [1.65]
52.0 [2.05]
34.8 [1.37]
153.9 [6.06]
9.5 [.38]
17.5 [.69]
77.0 [3.03]
104.6 [4.12]
7.9 [.31] 15.9 [.63]
47.6 [1.88]
7.9 [.31] 26.0 [1.03]
42.8 [1.69]
77.0
[3.03]
R3.2 [.13]
TYP.
Ø.3 THRU
Ø.5 .4
Ø.2 THRU
Ø.4 .5
600 V 30 A
600 V 60 A
600 V 100 A
POWR-GARD® Blocks and Holders Datasheet
littelfuse.com/lft 5 of 5 © 2018 Littelfuse POWR-GARD® Products
Rev: 4-A-121818
LF SERIES CLASS T FUSE BLOCKS
Dimensions mm (inches)
38.1 [1.50]
196.9 [7.75]
9.5 [.38]
19.1 [.75]
114.3 [4.50]
9.5 [.38]
98.4 [3.88]
15.9 [.63]
57.2 [2.25]
19.1 [.75]
Ø.3 THRU
Ø.6 .5
Ø.3 THRU
Ø.5 .5
57.2 [2.25]
228.6 [9.00]
9.5 [.38]
28.6 [1.13]
12.7 [.50]
114.3 [4.50]
171.5 [6.75]
15.9 [.63]
60.3 [2.38]
85.7 [3.38]
127.0 [5.00]
44.5 [1.75]
Ø.3 THRU
Ø.5 .5
Ø.3 THRU
Ø.6 .5
69.9 [2.75]
247.7 [9.75]
9.5 [.38] 9.5 [.38]
209.6 [8.25]
60.3 [2.38]
123.8 [4.88]
15.9 [.63]
74.4 [2.93]
54.0 [2.13]
79.4 [3.13]
130.2 [5.13]
60.3 [2.38]
149.2 [5.88]
Ø.3 THRU
Ø.8 .5
Ø.3 THRU
Ø.5 .5
600 V 200 A
600 V 400 A
600 V 600 A
Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse
products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer.
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Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Littelfuse:
LFT300303C LFT300302C LFT600301S LFT600302S LFT301003CS LFT606001CS LFT602001CS
LFT604001CS LFT600603C LFT601001CS LFT300602C LFT600303C LFT600303S LFT600601C LFT302001CS
LFT600302C LFT301001CS LFT601003CS LFT600602C LFT304001CS LFT306001CS LFT600301C
LFT300601C LFT606003CS LFT300301C LFT300603C LFT604003CS LFT304003CS LFT602003CS LFT600301P
LFT306003CS LFT600302P LFT302003CS LFT600303P
