Littelfuse LFR User Manual
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 <0.6 mA at 600 V
Withstand Rating Class H: 10 kA RMS SYM
Flammability Rating UL94 V-0
Approvals UL Listed (File: E14721)
CSA Certified (File: LR7316)
Environmental RoHS Compliant, Lead (Pb) Free
Class R: 200 kA RMS SYM
Description
The Littelfuse Class H/K5 and R blocks offer many benefits
such as indication, snap-to-release DIN rail mounting and
Web Resources
Sample requests, downloadable CAD drawings and other
technical information: Littelfuse.com/lfh
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
Recommended Fuses
Class H/K5 Blocks – 250 V
NLN, RLN
Class R Blocks – 250 V
FLNR/FLNR_ID, KLNR, LLNRK
Class H/K5 Blocks – 600 V
NLS, RLS
Class R Blocks – 600 V
FLSR/FLSR_ID, KLSR, LLSRK/LLSRK_ID, IDSR
Ordering Information (Class H 250 V)
ordering number
amp
rating
30
60
100
200
400
600
Note: Reinforcing springs standard on all Class H fuse blocks. *Covers sold individually. One cover needed for each pole.
baSe part
poLeS
number
1 LFH250301 C P S
3 LFH250303 C P S S 10-22 AWG
1 LFH250601 CID — —
3 LFH250603 CID — —
13LFH251001
LFH251003
1 LFH252001 C — —
3 LFH252003 C — —
1 LFH254001 C — —
3 LFH254003 C — —
1 LFH256001 C — —
3 LFH256003 C — —
box
Lug
CID
CID
SuFFix
preS Sure
pLate
—
—
SCreW
—
—
torque
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs)
4.5 N-m (40 in-lbs) 8 AWG
4.0 N-m (35 in-lbs)
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 — — —
Wire
range
terminaL
C 6-14 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
10-14 AWG
Littelfuse.com/lfr
Littelfuse.com/fuseblocks
Wire type
CU Only
CU-AL 125˚C • • LFH25060FBC2 LFH250602 CID — —
Solid/
CU-AL 130˚C — • LF H2 5100FBC
Stranded
baSe
temp
rating
125˚C • — LFH25030FBC2 LFH250302 C P S P 10-14 AWG
din
raiL
ordering
number*
indiCation
CoVer
Littelfuse.com
1 of 6
© 2013 Littelfuse POWR-GARD® Products
Rev: 011513
POWR-GARD® Blocks and Holders Datasheet
LF SerieS CLaSS H/K5 and r FuSe bLoCKS
Ordering Information (Class H 600 V)
ordering number
amp
rating
30
60
100
200
400
600
Note: Reinforcing springs standard on all Class H fuse blocks.
baSe
ordering
poLeS
number
1 LFH600301 CID PID SID
3 LFH600303 CID PID SID S 10-22 AWG
1 LFH600601 CID — —
3 LFH600603 CID — —
13LFH601001
LFH601003
1 LFH602001 C — —
3 LFH602003 C — —
1 LFH604001 C — —
3 LFH604003 C — —
1 LFH606001 C — —
3 LFH606003 C — —
box
Lug
CID
CID
SuFFix
preS Sure
pLate
—
—
SCreW
—
—
Ordering Information (Class R 250 V)
ordering number
amp
rating
30
60
100
200
400
600
Note: Reinforcing springs standard on all Class R fuse blocks.
baSe
ordering
poLeS
number
1 LFR250301 C P S
3 LFR250303 C P S S 10-22 AWG
1 LFR250601 CID — —
3 LFR250603 CID — —
13LFR251001
LFR251003
1 LFR252001 C — —
3 LFR252003 C — —
1 LFR254001 C — —
3 LFR254003 C — —
1 LFR256001 C — —
3 LFR256003 C — —
box
Lug
CID
CID
SuFFix
preS Sure
pLate
—
—
SCreW
—
—
torque
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs) 2/0-6AWG
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 — — —
torque
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs) 2/0-6 AWG
4.5 N-m (40 in-lbs) 8 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 — — —
Wire
range
terminaL
C 6-14 AWG
2-4 AWG
6-14AWG
Wire
range
terminaL
C 6-14 AWG
2-4 AWG
6-14 AWG
Wire type
CU Only
CU-AL 130˚C • • LFH60060FBC2 LFH600602 CID — —
CU-AL 130˚C — • LFH60100FBC4.5 N-m (40 in-lbs) 8 AWG
Wire type
CU Only
CU-AL 125˚C • • LFH25060FBC2 LFR250602 CID — —
CU-AL 130˚C — • LFH25100 FBC
Solid/
Stranded
Solid/
Stranded
baSe
temp
rating
130˚C • • LFH60030FBC2 LFH600302 CID PID SID P 10-14 AWG
baSe
temp
rating
125˚C • — LFH25030FBC2 LFR250302 C P S P 10-14 AWG
Snap
to
reLeaSe
Snap
to
reLeaSe
CoVer
ordering
number*
indiCation
CoVer
ordering
number*
indiCation
Ordering Information (Class R 600 V)
ordering number
amp
rating
30
60
100
200
400
600
Note: Reinforcing springs standard on all Class R fuse blocks.
*Covers sold individually. One cover needed for each pole.
Littelfuse.com
baSe
ordering
poLeS
number
1 LFR600301 CID PID SID
3 LFR600303 CID PID SID S 10-22 AWG
1 LFR600601 CID — —
3 LFR600603 CID — —
13LFR601001
LFR601003
1 LFR602001 C — —
3 LFR602003 C — —
1 LFR604001 C — —
3 LFR604003 C — —
1 LFR606001 C — —
3 LFR606003 C — —
box
Lug
CID
CID
SuFFix
preS Sure
pLate
— —
— —
SCreW
torque
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
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 — — —
Wire
range
terminaL
C 6-14 AWG
2-4 AWG
6-14 AWG
Wire type
CU Only
CU-AL 130˚C • • LFH60060FBC2 LFR600602 CID — —
CU-AL 130˚C — • LFH60100FBC— — 4.5 N-m (40 in-lbs) 8 AWG
Solid/
Stranded
2 of 6
baSe
temp
rating
130˚C • • LFH60030FBC2 LFR600302 CID PID SID P 10-14 AWG
© 2013 Littelfuse POWR-GARD® Products
Snap
to
reLeaSe
CoVer
ordering
number*
indiCation
Rev: 011513
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