Littelfuse LFJ User Manual
POWR-GARD® Blocks and Holders Datasheet
LF SerieS CLaSS J FuSe bLoCkS
600 V
Specifications
Voltage Ratings 600 V
Ampere Ratings 0 – 600 A
Leakage Current <0.6 mA at 600 V
Flammability Rating UL94 V-0
Approvals UL Listed (File: E14721)
CSA Certified (File: LR7316)
Environmental RoHS Compliant, Lead (Pb) Free
Recommended Fuses
Description
The Littelfuse 600 V Class J blocks offer generous space
savings and enhanced value over previous generations, such
as indication, snap-to-release DIN rail mounting and universal
mounting holes.
Features/Benefits
• Space-saving design – up to 45% smaller
• Universal mounting holes for easy replacement
• Indication offered on all versions except 200–600 A
• One hand release from DIN rail for ferrule style fuses
• Reinforced fuse clips are standard on all Class J blocks
• Covers available for 100 A and lower to enhance safety
Time Delay
Series: JTD_ID
Series: JTD
Fast Acting
Series: JLS
For information about Touch-Safe Class J fuse holders:
Littelfuse.com/lfpsj
Web Resources
Sample requests, downloadable CAD drawings, fuse block
cover datasheet and other technical information:
Littelfuse.com/fuseblocks
Littelfuse.com/lfj
Ordering Information
(Class J 600 V)
ordering number
amp
rating
30
60
100
200
400
600
Note: Reinforcing springs standard on all Class J fuse blocks.
*Covers sold individually. One cover needed for each pole.
Littelfuse.com
baSe
part
poLeS
number
1 LFJ600301 CID PID SID
3 LFJ600303 CID PID SID S 10-22 AWG
1 LFJ600601 CID — —
2 LFJ600602 CID — —
3 LFJ600603 CID — —
1 LFJ601001 CID — —
3 LFJ601003 CID — —
1 LFJ602001 C — —
3 LFJ602003 C — —
1 LFJ604001 C — —
3 LFJ604003 C — —
1 LFJ606001 C — —
3 LFJ606003 C — —
terminaL SuFFix
box Lug
preS Sure
pLate
SCreW
torque
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs) 2-4 AWG
2.8 N-m (25 in-lbs) 6-14 AWG
13.6 N-m (120 in-lbs) 2/0-6 AWG
4.0 N-m (35 in-lbs) 10-14 AWG
31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130˚C — — —
31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130˚C — — —
42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130˚C — — —
1 of 3
Wire range Wire type
terminaL
C 6-14 AWG
CU Only
CU-AL 125˚C • • LFJ60060FBC
CU-AL 130˚C — • LFJ60100FBC4.5 N-m (40 in-lbs) 8 AWG
temp
rating
Solid / Stranded
© 2013 Littelfuse POWR-GARD® Products
baSe
din
raiL
125˚C • • LFJ60030FBC2 LFJ600302 CID PID SID P 10-14 AWG
CoVer
ordering
number*
indiCation
Rev: 011513
POWR-GARD® Blocks and Holders Datasheet
97.2
(3.83)
3.6 (.14)
42.4 (1.67)
12.0 (.47)
22.5 (.89)
32.9 (1.30)
52.5
(2.07)
81.2 (3.20)
50.8 (2.00)
119.9 (4.72)
89.5 (3.52)
56.9 (2.24)
21.1 (.83)
LF SerieS CLaSS J FuSe bLoCkS
Dimensions mm (inches)
600 V 30 A
29.2 (1.15)
21.8 (.86)
21.4 (.84)
12.5 (.49)
7.4 (.29)
39.2 (1.54)
34.0 (1.34)
55.9 (2.20)
82.5 (3.25)
49.5 (1.95)
94.1
(
3.70)
600 V 60 A
56.5
(2.23)
3.6 (.14)
43.2
(1.70)
Ø.2 THRU
Ø.4 .2
R2.8 (.11)
TYP.
600 V 100 A
138.2 (5.44)
Littelfuse.com
48.8 (1.92)
37.1 (1.46)
11.7 (.46)
5.3 (.21)
72.5 (2.86)
R3.6 (.14)
TYP.
Ø.3 THRU
17.3 (.68)
72.5 (2.86)
Ø.5 .6
49.0 (1.93)
136.1 (5.36)
87.1 (3.43)
2 of 3
66.5 (2.62)
21.0 (.83)
© 2013 Littelfuse POWR-GARD® Products
Rev: 011513
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