POWR-GARD® Blocks and Holders Datasheet
Littelfuse.com/lfj 1 of 3 © 2017 Littelfuse POWR-GARD® Products
Rev: 4-A-101217
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
REACH Compliant
Recommended Fuses
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
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
• Both hex and slot set screw options available on 30A and
60A box lugs
Note: Reinforcing springs standard on all Class J fuse blocks.
*Covers sold individually. One cover needed for each pole.
Ordering Information
(Class J 600 V)
AMP
RATING
POLES
ORDERING NUMBER
TORQUE
TERMINAL
WIRE RANGE WIRE TYPE
BASE
TEMP
RATING
DIN
RAIL
INDICATION
COVER
ORDERING
NUMBER*
BASE
PART
NUMBER
TERMINAL SUFFIX
BOX LUG
HEX
BOX LUG
SLOT
PRES SURE
PLATE SCREW
30
1 LFJ600301 CID-HX CID PID SID
2.8 N-m (25 in-lbs)
C 6-14 AWG
CU Only
Solid / Stranded
125˚C • • LFJ60030FBC2 LFJ600302 CID-HX CID PID SID P 10-14 AWG
3 LFJ600303 CID-HX CID PID SID S 10-22 AWG
60
1 LFJ600601 CID-HX CID — — 5.6 N-m (50 in-lbs) 2-4 AWG CU-AL 125˚C • • LFJ60060FBC
2 LFJ600602 CID-HX CID — — 2.8 N-m (25 in-lbs) 6-14 AWG
3 LFJ600603 CID-HX CID — —
100
1 LFJ601001 C — — — 13.6 N-m (120 in-lbs) 2/0-6 AWG
CU-AL 130˚C — • LFJ60100FBC4.5 N-m (40 in-lbs) 8 AWG
3 LFJ601003 C — — — 4.0 N-m (35 in-lbs) 10-14 AWG
200 1 LFJ602001 C — — — 31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130˚C — — —
3 LFJ602003 C — — —
400 1 LFJ604001 C — — — 31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130˚C — — —
3 LFJ604003 C — — —
600 1 LFJ606001 C — — — 42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130˚C — — —
3 LFJ606003 C — — —
Patent
US8810420
POWR-GARD® Blocks and Holders Datasheet
Littelfuse.com/lfj 2 of 3 © 2017 Littelfuse POWR-GARD® Products
Rev: 4-A-101217
94.1
(3.70)
3.6 (.14)
43.2
(1.70)
56.5
(2.23)
7.4 (.29)
12.5 (.49)
21.4 (.84)
21.8 (.86)
29.2 (1.15)
55.9 (2.20)
34.0 (1.34)
39.2 (1.54)82.5 (3.25)49.5 (1.95)
R2.8 (.11)
TYP.
Ø.2 THRU
Ø.4 .2
600 V 30 A
LF SERIES CLASS J FUSE BLOCKS
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)
138.2 (5.44)
48.8 (1.92)
5.3 (.21)
11.7 (.46)
37.1 (1.46)
72.5 (2.86)
R3.6 (.14)
TYP.
136.1 (5.36)
17.3 (.68)
49.0 (1.93)
87.1 (3.43)
72.5 (2.86)
Ø.3 THRU
66.5 (2.62)
21.0 (.83)
Ø.5 .6
600 V 60 A
600 V 100 A
Dimensions mm (inches)
POWR-GARD® Blocks and Holders Datasheet
Littelfuse.com/lfj 3 of 3 © 2017 Littelfuse POWR-GARD® Products
Rev: 4-A-101217
LF SERIES CLASS J FUSE BLOCKS
76.2 (3.00)
254.0
(10.00)
236.7 (9.32)
15.9 (.63)
84.4 (3.32)
12.7 (.50)
16.0 (.63)
60.2 (2.37)
63.5 (2.50)
101.6
(4.00)
146.1
(5.75)
152.4
(6.00)
101.6 (4.00)
152.4 (6.00)
42.2 (1.66)
194.6 (7.66)
R4.3 (.17)
TYP.
Ø.3 THRU
Ø.8 .4
Ø.3 THRU
Ø.8 .4
298.5 (11.75)
101.6 (4.00)
119.0 (4.69)
304.8 (12.00)
15.9 (.63)
110.6 (4.36)
179.5 (7.07)
28.6 (1.13)
73.0 (2.88)
12.7 (.50)
292.1 (11.50)
Ø.3 THRU
Ø.6 .4
600 V 400 A
600 V 600 A
76.2 (3.00)
155.7 (6.13)
203.2 (8.00)
12.7 (.50) 63.5 (2.50)
77.9 (3.07)
56.4 (2.22)
99.3 (3.91)
12.7 (.50)
190.5 (7.50)
15.9 (.63)
72.4 (2.85)
Ø.3 THRU
Ø.8 .4
600 V 200 A
Dimensions mm (inches)
