Littelfuse.com © 2018 Littelfuse POWR-GARD® Products
POWR-GARD® Blocks and Holders Datasheet
Rev: 062218
1 of 4
Specifications
Voltage Ratings 1000 VDC
Ampere Ratings 200, 400, 450 A
Flammability Rating UL94 V-0
Termination Type Box Lug or Stud Mount
Base Temp Rating 130˚ C
Approvals UL 4248-18 Listed
File: E345481 Vol. 1
Environmental RoHS Compliant
Recommended Fuses
SPFJ Solar Series
Web Resources
Sample requests, downloadable CAD drawings, dimensions
and other technical information:
Littelfuse.com/LFJ1000
For a comprehensive overview of solar market solutions,
visit: Littelfuse.com/solar
Clip-to-Box Stud-to-Stud Clip-to-Stud
Description
The LFJ1000 series fuse block is specifically designed
for the Littelfuse SPFJ 1000 V Solar Fuse. It meets UL
electrical requirements, is available in multiple amperages,
and comes in a variety of fuse mounting and termination
configurations; fuse clip to box lug, fuse stud to wire stud
and fuse clip to wire stud.
Features/Benefits
• Narrow width increases space savings
• Range of amperages to match all SPFJ fuse options
• Box Lug termination style accommodates a wide
range of cable sizes
• Stud-mounted option increases convenience
• Approval for use with copper or aluminum lugs
allowing for design flexibility
Ordering Information
(Clip-to-Box Lug 1000 V)
AMPERAGE ORDERING
NUMBER
INTERRUPT
RATING
WIRE RANGE
STANDARD (METRIC) WIRE TYPE RECOMMENDED
TORQUE
200 LFJ102001C 20 kA 250 kcmil - #6 (127mm2 - 16mm2)
Cu/Al Solid/
Stranded
275 in-lb (31.1 N-m)
400 LFJ104001C 10 kA 350 kcmil - 1/0 (177mm2 - 55mm2)275 in-lb (31.1 N-m)
450 LFJ104501C 20 kA 500 kcmil - #4 (253mm2 - 25mm2) 375 in-lb (42.4 N-m)
LFJ1000 SERIES SOLAR FUSE BLOCK
1000 VDC • Clip-to-Box • Stud-to-Stud • Clip-to-Stud
(Stud-to-Stud 1000 V)
AMPERAGE ORDERING
NUMBER
INTERRUPT
RATING
RECOMMENDED TORQUE MAX. BUSBAR
THICKNESS
RECOMMENDED BASE TORQUE
FUSE TERMINAL BOLT SIZE TORQUE
200 LFJ102001STST 20 kA 65 in-lb (7.3 N-m) 200 in-lb (22.6 N-m) .774” (19.66 mm)
1/4”
5/16”
30-40 in-lb
40-50 in-lb
400 LFJ104001STST 10 kA 170 in-lb (19.2 N-m) 200 in-lb (22.6 N-m) .555” (14.10 mm)
450 LFJ104501STST 20 kA 300 in-lb (33.9 N-m) 300 in-lb (33.9 N-m) .570” (14.18 mm)
(Clip-to-Stud 1000 V)
AMPERAGE ORDERING
NUMBER
INTERRUPT
RATING
RECOMMENDED TORQUE MAX. BUSBAR
THICKNESS
RECOMMENDED BASE TORQUE
TERMINAL BOLT SIZE TORQUE
200 LFJ102001CST 20 kA 200 in-lb (22.6 N-m) .774” (19.66 mm)
1/4”
5/16”
30-40 in-lb
40-50 in-lb
400 LFJ104001CST 10 kA 200 in-lb (22.6 N-m) .555” (14.10 mm)
450 LFJ104501CST 20 kA 300 in-lb (33.9 N-m) .570” (14.18 mm)
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.
Littelfuse.com © 2018 Littelfuse POWR-GARD® Products
POWR-GARD® Blocks and Holders Datasheet
Rev: 062218
2 of 4
84.4
(3.32)
76.2
(3.00)
57.2
(2.25)
19.1
(0.75)
108.0
(4.25)
146.1
(5.75)
254.0
(10.0)
15.9
(0.63)
[ ]
ø8.6 THRU
⊔
ø19.1 11.2
ø0.34 THRU
⊔
ø0.75 0.44
LFJ1000 SERIES SOLAR FUSE BLOCK
Dimensions mm (inches)
Clip-to-Box 1000 V 200 A
Clip-to-Box 1000 V 400 A
Clip-to-Box 1000 V 450 A
15.88
(0.63)
110.58
(4.35)
101.60
(4.00)
76.20
(3.00)
25.40
(1.00)
123.83
(4.88)
174.63
(6.88)
298.45
(11.75)
[ ]
ø7.1 THRU
⊔
ø14.2 x 11.2
ø0.28 THRU
⊔
ø0.56 x 0.44
72.4
(2.85)
69.9
(2.75)
50.8
(2.00)
19.1
(0.75)
77.9
(3.07)
155.7
(6.13)
15.9
(0.63)
[ ]
ø8.64 THRU
⊔
ø19.1 10.2
ø0.34 THRU
⊔
ø0.75 0.40
Littelfuse.com © 2018 Littelfuse POWR-GARD® Products
POWR-GARD® Blocks and Holders Datasheet
Rev: 062218
3 of 4
LFJ1000 SERIES SOLAR FUSE BLOCK
Dimensions mm (inches)
Stud-to-Stud 1000 V 450 A
Stud-to-Stud 1000 V 400 A
Stud-to-Stud 1000 V 200 A 20.88
(.822)
105.41
(4.150) 87.33
(3.438)
87.33
(3.438)
111.13
(4.375) 195.53
(7.698)
79.76
(3.140)
34.14
(1.344)
74.93
(2.950)
50.00
(1.969)
231.70
(9.122)
22.10
(.870)
∅8.64 THRU
⊔
∅19.05 10.16
∅0.34 THRU
⊔
∅0.75 0.40
[ ]
7/16-14 UNC-2A
1/4-20 UNC-2A
16.13
(.635)
40.79
(1.606)
135.80
(5.347) 108.41
(4.268)
152.40
(6.000)
1/2-13 UNC-2A
254.91
(10.036)
99.61
(3.922)
309.70
(12.193)
30.17
(1.188)
51.11
(2.012)
101.160
(4.000)
81.28
(3.200)
16.13
(.635)
8.61
(.339)
29.49
(1.161)
8.61
(.339) 33.02
(1.300)
∅8.64 THRU
⊔
∅19.05 10.16
∅0.34 THRU
⊔
∅0.75 0.40
[ ]
33.02
(1.30)
29.49
(1.161)
TYP
120.17
(4.731)
133.35
(5.250) 230.94
(9.092)
90.08
(3.547)
278.43
(10.962)
76.20
(3.000)
96.42
(3.796) 8.61
(.339)
8.61
(.339)
∅8.64 THRU
⊔
∅19.05 10.16
∅0.34 THRU
⊔
∅0.75 0.40
[ ]
7/16-14 UNC-2A 3/8-16 UNC-2A
28.57
(1.125)
46.36
(1.825)
74.93
(2.950)
16.13
(.635)
Littelfuse.com © 2018 Littelfuse POWR-GARD® Products
POWR-GARD® Blocks and Holders Datasheet
Rev: 062218
4 of 4
LFJ1000 SERIES SOLAR FUSE BLOCK
Dimensions mm (inches)
Clip-to-Stud 1000 V 450 A
Clip-to-Stud 1000 V 400 A
Clip-to-Stud 1000 V 200 A
84.6
(3.33)
76.2
(3.00)
29.5
(1.16)
33.0
(1.30)
21.6
(.85)
120.2
(4.73)
128.8
(5.07)
149.7
(5.89)
158.3
(6.23)
278.4
(10.96)
54.6
(2.15)
46.4
(1.83)
16.1
(.64)
[ ]
ø8.6 THRU
⊔
ø19.1 10.2
ø.34 THRU
⊔
ø.75 0.40
[ ]
ø8.6 THRU
⊔
ø19.1 10.2
ø.34 THRU
⊔
ø.75 0.40
16.1
(.64)
74.9
(2.95)
14.0
(.55)
105.4
(4.15)
126.3
(4.97)
231.7
(9.12)
36.0
(1.42) 50.0
(1.97)
22.1
(.87)
20.9
(.82)
40.8
(1.61)
7/16-14 UNC 2A
7/16-14 UNC 2A
[ ]
ø8.6 THRU
⊔
ø19.1 10.2
ø.34 THRU
⊔
ø.75 0.40
110.8
(4.36)
101.6
(4.00)
135.8
(5.35)
34.3
(1.35)
309.7
(12.19) 173.9
(6.85) 165.3
(6.51) 144.4
(5.69)
67.3
(2.65)
29.5
(1.16)
33.0
(1.30)
51.1
(2.01)
16.1
(.64)
1/2-13 UNC 2A
