Littelfuse LFJ1000 User Manual

POWR-GARD® Blocks and Holders Datasheet

LFJ1000 SerIeS SOLAr FuSe bLOck

1000 VDC • Clip-to-Box • Stud-to-Stud • Clip-to-Stud

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

Clip-to-Box Stud-to-Stud Clip-to-Stud

Approvals UL 4248-18 Listed
File: E345481 Vol. 1
Environmental RoHS Compliant

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exibility

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

Ordering Information

(Clip-to-Box Lug 1000 V)

AmperAge

200 LFJ102001C 20 kA 250 kcmil - #6 (127mm2 - 16mm2)

400 LFJ104001C 10 kA 350 kcmil - 1/0 (177mm

450 LFJ104501C 20 kA 500 kcmil - #4 (253mm

OrDerINg

Number

(Stud-to-Stud 1000 V)

AMPERAGE

200 LFJ102001STST 20 kA 65 in-lb (7.3 N-m) 200 in-lb (22.6 N-m) .774” (19.66 mm)

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)

ORDERING

NuMbER

INTerrupT

rATINg

INTerrupT

rATINg

WIre rANge

STANDArD (meTrIc)

2

- 55mm2) 275 in-lb (31.1 N-m)

2

- 25mm2) 375 in-lb (42.4 N-m)

RECOMMENDED TORQuE

FuSE TERMINAL bOLT SIZE TORQuE

Cu/Al

MAX. buSbAR

WIre TYpe

Solid/

Stranded

THICKNESS

recOmmeNDeD

TOrQue

275 in-lb (31.1 N-m)

recOmmeNDeD bASE TORQuE

1/4”

5/16”

30-40 in-lb
40-50 in-lb

(Clip-to-Stud 1000 V)

AMPERAGE

200 LFJ102001CST 20 kA 200 in-lb (22.6 N-m) .774” (19.66 mm)

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)

Littelfuse.com © 2012 Littelfuse POWR-GARD® Products

ORDERING

NuMbER

INTerrupT

rATINg

RECOMMENDED TORQuE

TERMINAL bOLT SIZE TORQuE

1 of 4

MAX. buSbAR

THICKNESS

recOmmeNDeD bASE TORQuE

1/4”

5/16”

30-40 in-lb
40-50 in-lb

Rev: 120512

POWR-GARD® Blocks and Holders Datasheet

LFJ1000 SerIeS SOLAr FuSe bLOck

Dimensions mm (inches)

Clip-to-Box 1000 V 20 0 A

Clip-to-Box

1000 V 40 0 A

155.7
(6.13)

ø8.64 THRU

⊔

ø19.1

10.2

ø0.34 THRU

[ ]

ø0.75 0.40

⊔

254.0
(10.0)

77.9

(3.07)

146.1
(5.75)

19.1

(0.75)

15.9

(0.63)

50.8

(2.00)

108.0
(4.25)

69.9

(2.75)

72.4

(2.85)

19.1

(0.75)

57.2

(2.25)

76.2

(3.00)

Clip-to-Box 1000 V 45 0 A

ø8.6 THRU

⊔

[ ]

⊔

298.45
(11.75)

ø19.1

ø0.34 THRU

ø0.75 0.44

11.2

174.63
(6.88)

ø7.1 THRU

⊔

ø14.2 x 11.2

ø0.28 THRU

[ ]

ø0.56 x 0.44

⊔

123.83
(4.88)

15.9

(0.63)

84.4

(3.32)

25.40
(1.00)

76.20
(3.00)

110.58
(4.35)

101.60
(4.00)

15.88

(0.63)

Littelfuse.com © 2012 Littelfuse POWR-GARD® Products

2 of 4

Rev: 120512

POWR-GARD® Blocks and Holders Datasheet

LFJ1000 SerIeS SOLAr FuSe bLOck

Dimensions mm (inches)

Stud-to-Stud 1000 V 200 A

Stud-to-Stud 1000 V 40 0 A

105.41
(4.150)

7/16-14 UNC-2A

120.17
(4.731)

7/16-14 UNC-2A

87.33

(3.438)

8.64 THRU

∅

∅

⊔

∅

0.34 THRU

[ ]

⊔

∅

1/4-20 UNC-2A

96.42

(3.796)

19.05

10.16

0.75 0.40

8.61

(.339)

133.35
(5.250)

3/8-16 UNC-2A

20.88
(.822)

79.76

(3.140)

231.70
(9.122)

29.49

(1.161)

TYP

(3.547)

(10.962)

111.13

(4.375)

90.08

278.43

22.10
(.870)

8.64 THRU

∅

⊔

∅

0.34 THRU

[ ]

⊔

(3.438)

8.61

(.339)

∅

19.05

0.75 0.40

∅

87.33

33.02
(1.30)

10.16

195.53
(7.698)

230.94
(9.092)

74.93

(2.950)

34.14

(1.344)

40.79

(1.606)

50.00

(1.969)

74.93

(2.950)

28.57

(1.125)

46.36

(1.825)

16.13
(.635)

76.20

(3.000)

16.13
(.635)

99.61

254.91

(10.036)

3 of 4

8.61

(.339)

33.02

(1.300)

8.64 THRU

∅

∅

⊔

19.05

10.16

∅

0.34 THRU

[ ]

0.75 0.40

⊔

∅

81.28

(3.200)

30.17

(1.188)

51.11

(2.012)

101.160
(4.000)

16.13
(.635)

Rev: 120512

Stud-to-Stud 1000 V 45 0 A

135.80
(5.347)

1/2-13 UNC-2A

108.41
(4.268)

8.61

(.339)

152.40
(6.000)

29.49

(1.161)

(3.922)

309.70

(12.193)

Littelfuse.com © 2012 Littelfuse POWR-GARD® Products

POWR-GARD® Blocks and Holders Datasheet

LFJ1000 SerIeS SOLAr FuSe bLOck

Dimensions mm (inches)

Clip-to-Stud 1000 V 200 A

Clip-to-Stud 10 00 V 400 A

231.7

(9.12)

22.1
(.87)

33.0

(1.30)

278.4

(10.96)

20.9
(.82)

(1.16)

126.3
(4.97)

29.5

105.4
(4.15)

ø8.6 THRU

⊔

ø19.1

10.2

ø.34 THRU

[ ]

ø.75 0.40

⊔

158.3

(6.23)

149.7
(5.89)

128.8
(5.07)

ø8.6 THRU

⊔

ø19.1

ø.34 THRU

[ ]

ø.75 0.40

⊔

14.0
(.55)

36.0

(1.42)

50.0

(1.97)

74.9

(2.95)

40.8

(1.61)

16.1
(.64)

120.2
(4.73)

21.6

(.85)

54.6

(2.15)

76.2

(3.00)

10.2

Clip-to-Stud 1000 V 450 A

309.7

(12.19)

33.0

(1.30)

29.5

(1.16)

173.9
(6.85)

165.3

(6.51)

144.4
(5.69)

ø8.6 THRU

⊔

ø19.1

10.2

ø.34 THRU

[ ]

ø.75 0.40

⊔

135.8
(5.35)

16.1
(.64)

46.4

(1.83)

34.3

(1.35)

(3.33)

16.1
(.64)

84.6

67.3

(2.65)

101.6

(4.00)

110.8
(4.36)

51.1

(2.01)

Littelfuse.com © 2012 Littelfuse POWR-GARD® Products

4 of 4

Rev: 120512