POWR-GARD
®
Blocks and Holders Datasheet
LF SERIES CLASS T FUSE BLOCKS
300 V • 600 V
Specifications
Voltage Ratings
Ampere Ratings
Leakage Current
Withstand Rating
Flammability Rating
Approvals
Environmental
300 VAC/600 VAC
0 – 600 A
<0.6 mA at 600 V
200 kA RMS SYM
UL94 V-0
UL Listed (File: E14721)
CSA Certified (File: LR7316)
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.
Recommended Fuses
300 V
JLLN
600 V
JLLS
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
Web Resources
Sample requests, downloadable CAD drawings and other
technical information:
littelfuse.com/lft
littelfuse.com/fuseblocks
Ordering Information
(Class T 300 V)
BASE TEMP
RATING
DIN RAIL
MOUNT
•
•
AMP
RATING
ORDERING NUMBER
BASE
ORDERING
NUMBER
LFT30030
LFT30060
LFT30100
LFT30200
LFT30400
LFT30600
POLES
1
1
1
1
1
1
1
2
2
2
—
—
—
—
3
3
3
3
3
3
3
TERMINAL SUFFIX
BOX PRESSURE SCREW
LUG
PLATE
C
C
CS
CS
CS
CS
—
—
—
—
—
—
—
—
—
—
—
—
TORQUE
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)
31.1 N-m (275 in-lbs)
(2) 31.1 N-m (275 in-lbs)
(2) 42.4 N-m (375 in-lbs)
WIRE
RANGE
2-4 AWG
6-14 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
250 kcmil-6
250 kcmil-6
500 kcmil-6
WIRE
TYPE
COVER
ORDERING
NUMBER*
LFT30030FBC
LFT30060FBC
LFT30100FBC
—
—
—
30
60
100
200
400
600
125˚C
Solid/Stranded
125˚C
130˚C
130˚C
130˚C
130˚C
CU-AL
—
—
—
—
Ordering Information
(Class T 600 V)
BASE TEMP
RATING
DIN RAIL
MOUNT
•
•
—
—
—
—
AMP
RATING
ORDERING NUMBER
BASE
ORDERING
NUMBER
LFT60030
LFT60060
LFT60100
LFT60200
LFT60400
LFT60600
POLES
1
1
1
1
1
1
1
2
2
2
—
—
—
—
3
3
3
3
3
3
3
TERMINAL SUFFIX
BOX PRESSURE SCREW
LUG
PLATE
C
C
CS
CS
CS
CS
P
—
—
—
—
—
S
—
—
—
—
—
TORQUE
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)
31.1 N-m (275 in-lbs)
(2) 31.1 N-m (275 in-lbs)
(2) 42.4 N-m (375 in-lbs)
WIRE
RANGE
WIRE
TYPE
COVER
ORDERING
NUMBER*
LFT60030FBC
LFT60060FBC
LT60100FBC
LT60200FBC
LT60400FBC
LT60600FBC
30
60
100
200
400
600
2-4 AWG
†
see
6-14 AWG
note
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
250 kcmil-6
250 kcmil-6
500 kcmil-6
CU-AL
125˚C
Solid/Stranded
125˚C
130˚C
130˚C
130˚C
130˚C
* Covers sold individually. One cover needed for each pole.
†
Wire Type for Pressure Plate and Screw Terminal is CU only
littelfuse.com/lft
1 of 5
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
POWR-GARD
®
Blocks and Holders Datasheet
LF SERIES CLASS T FUSE BLOCKS
Dimensions mm (inches)
300 V 30 A
21.8 [.86]
59.9 [2.36]
44.9 [1.77]
35.6 [1.40]
15.0 [.59]
6.9 [.27]
40.9 [1.61]
25.9 [1.02]
35.6
[1.40]
Ø4.5 [.18]
TYP.
71.1
[2.80]
3.7 [.15]
300 V 60 A
24.6 [.97]
16.4 [.65]
8.2 [.32]
46.9 [1.85]
30.5 [1.20]
69.1 [2.72]
52.7 [2.07]
41.9 [1.65]
36.8
[1.45]
Ø4.5 [.18]
TYP.
73.7
[2.90]
4.5 [.18]
300 V 100 A
26.9 [1.06]
34.8 [1.37]
17.4 [.69]
42.8 [1.69]
Ø.2 THRU
Ø.4 .5
104.6 [4.12]
26.0 [1.03]
17.4 [.69]
7.9 [.31]
47.6 [1.88]
15.9 [.63]
9.5 [.38]
7.9 [.31]
66.7
[2.63]
133.4
[5.25]
Ø.2 THRU
Ø.4 .5
Ø.2 THRU
Ø.5 .4
R3.2 [.13]
TYP.
littelfuse.com/lft
2 of 5
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
POWR-GARD
®
Blocks and Holders Datasheet
LF SERIES CLASS T FUSE BLOCKS
Dimensions mm (inches)
300 V 200 A
38.1 [1.50]
19.1 [.75]
9.5 [.38]
22.2 [.88]
9.5 [.38]
114.3 [4.50]
92.1 [3.63]
57.2 [2.25]
15.9 [.63]
Ø.3 THRU
Ø.5 .5
88.9
[3.50]
168.3
[6.63]
177.8
[7.00]
R3.6 [.14]
TYP.
28.6 [1.13]
57.2 [2.25]
Ø.3 THRU
Ø.5 .5
171.5 [6.75]
127.0 [5.00]
85.7 [3.38]
60.6 [2.38]
15.9 [.63]
300 V 400 A
12.7 [.50]
9.5 [.38]
103.1
[4.06]
Ø.3 THRU
Ø.6 .5
206.2
[8.12]
300 V 600 A
69.9 [2.75]
60.3 [2.38]
Ø.3 THRU
Ø.5 .5
79.4 [3.13]
60.3 [2.38]
54.0 [2.13]
209.6 [8.25]
74.4 [2.93]
15.9 [.63]
9.5 [.38]
8.8 [.35]
111.1
[4.38]
Ø.3 THRU
Ø.8 .5
213.5
[8.41]
222.3
[8.75]
littelfuse.com/lft
3 of 5
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
POWR-GARD
®
Blocks and Holders Datasheet
LF SERIES CLASS T FUSE BLOCKS
Dimensions mm (inches)
600 V 30 A
7.6 [.30]
24.6 [.97]
17.0 [.67]
46.9 [1.85]
29.8 [1.17]
69.1 [2.72]
52.0 [2.05]
41.9 [1.65]
44.8
[1.77]
R2.9 [.11]
TYP.
89.7
[3.53]
600 V 60 A
76.1 [3.00]
45.7 [1.80]
112.3 [4.42]
81.9 [3.23]
54.0 [2.13]
39.9 [1.57]
9.5 [.38]
36.2
[1.42]
72.3
[2.85]
3.7 [.15]
600 V 100 A
34.8 [1.37]
17.5 [.69]
7.9 [.31]
9.5 [.38]
26.0 [1.03]
Ø.2 THRU 7.9 [.31]
Ø.4 .5
42.8 [1.69]
104.6 [4.12]
47.6 [1.88]
15.9 [.63]
77.0 [3.03]
77.0
[3.03]
Ø.3 THRU
Ø.5 .4
R3.2 [.13]
TYP.
153.9 [6.06]
littelfuse.com/lft
4 of 5
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
POWR-GARD
®
Blocks and Holders Datasheet
LF SERIES CLASS T FUSE BLOCKS
Dimensions mm (inches)
600 V 200 A
38.1 [1.50]
19.1 [.75]
9.5 [.38]
19.1 [.75]
Ø.3 THRU 9.5 [.38]
Ø.5 .5
114.3 [4.50]
57.2 [2.25]
15.9 [.63]
98.4 [3.88]
196.9 [7.75]
Ø.3 THRU
Ø.6 .5
600 V 400 A
28.6 [1.13]
12.7 [.50]
9.5 [.38]
57.2 [2.25]
44.5 [1.75]
171.5 [6.75]
127.0 [5.00]
Ø.3 THRU
Ø.5 .5
85.7 [3.38]
60.3 [2.38]
15.9 [.63]
114.3 [4.50]
228.6 [9.00]
Ø.3 THRU
Ø.6 .5
600 V 600 A
69.9 [2.75]
60.3 [2.38]
9.5 [.38]
9.5 [.38]
Ø.3 THRU
Ø.5 .5
79.4 [3.13]
60.3 [2.38]
54.0 [2.13]
209.6 [8.25]
149.2 [5.88]
130.2 [5.13]
74.4 [2.93]
15.9 [.63]
123.8 [4.88]
Ø.3 THRU
Ø.8 .5
247.7 [9.75]
littelfuse.com/lft
5 of 5
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
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