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POWR-GARD

Blocks and Holders Datasheet

1 of 6

Products

Rev: 4-A-012516

LF SERIES CLASS H/K5 AND R FUSE BLOCKS

250 V • 600 V

Description

The Littelfuse Class H/K5 and R blocks offer many beneﬁts

such as indication, snap-to-release DIN rail mounting and

universal mounting holes. Class H and Class R fuse blocks

are dimensionally the same, but Class R blocks incorporate

a rejection feature, which only allows Class R fuses to

be inserted.

Features/Beneﬁts

• Universal mounting holes for easy replacement

• Indication offered on most 250 V and 600 V versions

• One hand release from DIN rail for ferrule style fuses

• Reinforced fuse clips are standard on all Class H and

Class R fuse blocks

• Covers available for 100 A and lower to enhance safety

Speciﬁcations

Voltage Rating 250 V, 600 V

Ampere Ratings 0-600 A

Leakage Current <0.6 mA at 600 V

Withstand Rating Class H: 10 kA RMS SYM

Class R: 200 kA RMS SYM

Flammability Rating UL94 V-0

Approvals UL Listed (File: E14721)

CSA Certiﬁed (File: LR7316)

Environmental RoHS Compliant, Lead (Pb) Free

Web Resources

Sample requests, downloadable CAD drawings and other

technical information: littelfuse.com/lfh

littelfuse.com/lfr

Recommended Fuses

Class H/K5 Blocks – 250 V

NLN

Class R Blocks – 250 V

FLNR/FLNR_ID, KLNR, LLNRK

Class H/K5 Blocks – 600 V

NLS

Class R Blocks – 600 V

FLSR/FLSR_ID, KLSR, LLSRK/LLSRK_ID, IDSR

Ordering Information (Class H 250 V)

AMP

RATING

POLES

ORDERING NUMBER

TORQUE

TERMINAL

WIRE

RANGE

WIRE TYPE

BASE

TEMP

RATING

DIN

RAIL

INDICATION

COVER

ORDERING

NUMBER*

BASE PART

NUMBER

SUFFIX

BOX

LUG

PRES SURE

PLATE

SCREW

1 LFH250301 C P S

2.8 N-m (25 in-lbs)

C 6-14 AWG

CU Only

Solid/

Stranded

125˚C • — LFH25030FBC2 LFH250302 C P S P 10-14 AWG

3 LFH250303 C P S S 10-22 AWG

1 LFH250601 CID — —

5.6 N-m (50 in-lbs) 2-4 AWG

CU-AL 125˚C • • LFH25060FBC2 LFH250602 CID — —

2.8 N-m (25 in-lbs) 6-14 AWG

3 LFH250603 CID — —

100

1 LFH251001 CID — —

13.6 N-m (120 in-lbs) 2/0-6 AWG

CU-AL 130˚C — • LFH25100FBC4.5 N-m (40 in-lbs) 8 AWG

3 LFH251003 CID — —

4.0 N-m (35 in-lbs) 10-14 AWG

200

1 LFH252001 C — —

31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130˚C — — —

3 LFH252003 C — —

400

1 LFH254001 C — —

31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130˚C — — —

3 LFH254003 C — —

600

1 LFH256001 C — —

42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130˚C — — —

3 LFH256003 C — —

Note: Reinforcing springs standard on all Class H fuse blocks. *Covers sold individually. One cover needed for each pole.

Summary of content (6 pages)

PAGE 1
POWR-GARD® Blocks and Holders Datasheet LF SERIES CLASS H/K5 AND R FUSE BLOCKS 250 V • 600 V Specifications Voltage Rating 250 V, 600 V Ampere Ratings 0-600 A Leakage Current <0.
PAGE 2
POWR-GARD® Blocks and Holders Datasheet LF SERIES CLASS H/K5 AND R FUSE BLOCKS 100 200 400 600 BOX LUG CID CID CID CID CID CID CID 3 1 3 1 3 1 3 LFH601003 LFH602001 LFH602003 LFH604001 LFH604003 LFH606001 LFH606003 CID C C C C C C SUFFIX PRESSURE SCREW PLATE PID SID PID SID PID SID — — — — — — — — — — — — — — — — — — — — — — TORQUE 2.8 N-m (25 in-lbs) C P S WIRE RANGE WIRE TYPE BASE SNAP TEMP TO RATING RELEASE COVER ORDERING NUMBER* 2.8 N-m (25 in-lbs) 13.6 N-m (120 in-lbs) 4.
PAGE 3
POWR-GARD® Blocks and Holders Datasheet CLASS H/K5 AND R FUSE BLOCKS Dimensions mm (inches) 28.6 [1.13] 250 V 30 A 15.6 [.61] 13.0 [.51] 4.8 [.19] 76.5 [3.01] 74.7 [2.94] 48.5 [1.91] 32.2 [1.27] 23.8 [.94] 16.3 [.64] 6.8 [.27] 42.9 [1.69] 31.8 [1.25] 40.1 [1.58] 15.9 [.63] 8.4 [.33] 5.6 [.22] 31.9 38.2 [1.26] [1.51] 44.6 [1.76] R2.8 [.11] TYP R2.8 [.11] TYP .2 THRU 3.6 [.14] 250 V 60 A 37.3 [1.47] 22.4 [.88] 14.8 [.58] 9.7 [.38] 57.4 [2.26] 104.1 [4.10] 70.7 [2.78] 24.9 [.98] 89.2 [3.
PAGE 4
POWR-GARD® Blocks and Holders Datasheet CLASS H/K5 AND R FUSE BLOCKS Dimensions mm (inches) 250 V 200 A 63.5 [2.50] 12.7 [.50] 76.2 [3.00] 228.6 [9.00] 215.9 [8.50] 184.2 [7.25] 165.1 [6.50] 63.5 [2.50] 19.1 [.75] 12.7 [.50] 52.6 [2.07] 72.4 [2.85] 15.9 [.63] R4.3 [.17] TYP. 128.5 [5.06] 181.1 [7.13] Ø.3 THRU Ø.3 THRU Ø.8 .4 250 V 400 A 66.7 [2.63] 22.2 [.88] 15.9 [.63] 88.9 [3.50] 84.4 [3.32] 250.8 [9.88] 15.9 [.63] 15.9 [.63] 95.3 [3.75] 108.0 [4.25] 266.7 [10.50] 95.3 [3.75] Ø.
PAGE 5
POWR-GARD® Blocks and Holders Datasheet CLASS H/K5 AND R FUSE BLOCKS Dimensions mm (inches) 38.4 [1.51] 21.5 [.85] 19.2 [.76] 16.8 [.66] 6.4 [.25] 600 V 30 A 73.1 [2.88] 51.6 [2.03] 41.1 [1.62] 52.5 [2.07] 107.9 [4.25] 86.4 [3.40] 75.9 [2.99] 20.7 [.82] 47.6 [1.87] R3.4 [.13] TYP R2.6 [.10] TYP 56.0 [2.20] 118.6 [4.67] 127.1 [5.00] 166.7 [6.56] 600 V 60 A 43.8 [1.73] 83.6 [3.29] 32.4 [1.28] 29.8 [1.17] 19.9 [.78] 11.4 [.45] 69.5 [2.74] 59.6 [2.35] 123.2 [4.85] 109.3 [4.30] 59.7 [2.35] 99.
PAGE 6
POWR-GARD® Blocks and Holders Datasheet CLASS H/K5 AND R FUSE BLOCKS Dimensions mm (inches) 600 V 200 A 76.2 [3.00] 63.5 [2.50] 12.7 [.50] 52.3 [2.06] 84.2 [3.32] Ø.3 THRU Ø.7 .4 Ø.3 THRU Ø.8 .4 160.1 [6.31] 228.6 [9.00] 196.9 [7.75] 165.1 [6.50] 63.5 [2.50] 44.5 [1.75] 31.8 [1.25] 12.7 [.50] 72.4 [2.85] 15.9 [.63] 52.3 [2.06] 76.7 [3.02] 84.1 [3.31] Ø.3 THRU Ø.3 THRU Ø.8 .4 160.3 [6.31] 192.0 [7.56] 244.3 [9.62] R4.3 [.17] TYP. 600 V 400 A 88.9 [3.50] 73.0 [2.88] 66.7 [2.63] 22.2 [.88] 15.