POWR-GARD
®
Blocks and Holders Datasheet
LF SerieS CLaSS H/K5 and r FuSe bLoCKS
250 V • 600 V
Specifications
Voltage Rating
Ampere Ratings
Leakage Current
Withstand Rating
Flammability Rating
Approvals
Environmental
250 V, 600 V
0-600 A
<0.6 mA at 600 V
Class H: 10 kA RMS SYM
Class R: 200 kA RMS SYM
UL94 V-0
UL Listed (File: E14721)
CSA Certified (File: LR7316)
RoHS Compliant, Lead (Pb) Free
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.
Web Resources
Sample requests, downloadable CAD drawings and other
technical information:
Littelfuse.com/lfh
Littelfuse.com/lfr
Littelfuse.com/fuseblocks
Recommended Fuses
Class H/K5 Blocks – 250 V
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
•
•
•
•
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)
indiCation
—
•
•
—
—
—
terminaL
amp
rating
poLeS
ordering number
baSe part
number
LFH250301
LFH250302
LFH250303
LFH250601
LFH250602
LFH250603
LFH251001
LFH251003
LFH252001
LFH252003
LFH254001
LFH254003
LFH256001
LFH256003
box
Lug
C
C
C
CID
CID
CID
CID
CID
C
C
C
C
C
C
SuFFix
preSSure
SCreW
pLate
P
S
P
S
P
S
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
torque
Wire
range
6-14 AWG
10-14 AWG
10-22 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
250 kcmil-6
(2) 350 kcmil-1/0
(2) 500 kcmil-4
CU-AL
CU-AL
CU-AL
CU-AL
Wire type
baSe
temp
rating
din
raiL
CoVer
ordering
number*
30
60
1
2
3
1
2
3
1
3
1
3
1
3
1
3
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)
4.0 N-m (35 in-lbs)
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
C
P
S
CU Only
125˚C
•
LFH25030FBC
CU-AL
125˚C
•
LFH25060FBC
100
Solid/
Stranded
130˚C
—
LFH25100FBC
200
400
600
130˚C
130˚C
130˚C
—
—
—
—
—
—
Note: Reinforcing springs standard on all Class H fuse blocks. *Covers sold individually. One cover needed for each pole.
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)
amp
rating
ordering number
SuFFix
baSe
ordering box preSSure
SCreW
number
Lug
pLate
LFH600301
CID
PID
SID
LFH600302
CID
PID
SID
LFH600303
CID
PID
SID
LFH600601
CID
—
—
LFH600602
CID
—
—
LFH600603
CID
—
—
LFH601001
LFH601003
LFH602001
LFH602003
LFH604001
LFH604003
LFH606001
LFH606003
CID
CID
C
C
C
C
C
C
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
indiCation
—
—
—
indiCation
—
—
—
indiCation
—
—
—
terminaL
torque
Wire
range
Wire type
baSe
Snap
temp
to
rating reLeaSe
130˚C
130˚C
Solid/
Stranded
•
•
CoVer
ordering
number*
poLeS
1
2
3
1
2
3
1
3
1
3
1
3
1
3
30
60
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)
4.0 N-m (35 in-lbs)
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
C
P
S
6-14 AWG
10-14 AWG CU Only
10-22 AWG
2-4 AWG
6-14AWG
2/0-6AWG
8 AWG
10-14 AWG
250 kcmil-6
CU-AL
CU-AL
CU-AL
CU-AL
CU-AL
• LFH60030FBC
• LFH60060FBC
100
200
400
600
130˚C
130˚C
130˚C
130˚C
—
—
—
—
• LFH60100FBC
—
—
—
(2) 350 kcmil-1/0
(2) 500 kcmil-4
Note: Reinforcing springs standard on all Class H fuse blocks.
Ordering Information
(Class R 250 V)
amp
rating
ordering number
SuFFix
baSe
ordering box preSSure
SCreW
number
Lug
pLate
LFR250301
C
P
S
LFR250302
C
P
S
LFR250303
C
P
S
LFR250601
CID
—
—
LFR250602
CID
—
—
LFR250603
CID
—
—
CID
LFR251001
—
—
LFR251003
LFR252001
LFR252003
LFR254001
LFR254003
LFR256001
LFR256003
CID
C
C
C
C
C
C
—
—
—
—
—
—
—
—
—
—
—
—
—
—
terminaL
torque
Wire
range
Wire type
baSe
Snap
temp
to
rating reLeaSe
125˚C
125˚C
Solid/
Stranded
•
•
CoVer
ordering
number*
poLeS
1
2
3
1
2
3
1
3
1
3
1
3
1
3
30
60
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)
4.0 N-m (35 in-lbs)
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
C
P
S
6-14 AWG
10-14 AWG CU Only
10-22 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
250 kcmil-6
CU-AL
CU-AL
CU-AL
CU-AL
CU-AL
— LFH25030FBC
• LFH25060FBC
100
200
400
600
130˚C
130˚C
130˚C
130˚C
—
—
—
—
• LFH25100FBC
—
—
—
(2) 350 kcmil-1/0
(2) 500 kcmil-4
Note: Reinforcing springs standard on all Class R fuse blocks.
Ordering Information
(Class R 600 V)
amp
rating
ordering number
SuFFix
baSe
ordering box preSSure
SCreW
number
Lug
pLate
LFR600301
CID
PID
SID
LFR600302
CID
PID
SID
LFR600303
CID
PID
SID
LFR600601
CID
—
—
LFR600602
CID
—
—
LFR600603
CID
—
—
—
—
LFR601001
CID
—
—
LFR601003
CID
—
—
LFR602001
C
—
—
LFR602003
C
—
—
LFR604001
C
—
—
LFR604003
C
—
—
LFR606001
C
—
—
LFR606003
C
—
—
terminaL
torque
Wire
range
Wire type
baSe
Snap
temp
to
rating reLeaSe
130˚C
130˚C
Solid/
Stranded
•
•
CoVer
ordering
number*
poLeS
1
2
3
1
2
3
1
3
1
3
1
3
1
3
30
60
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)
4.0 N-m (35 in-lbs)
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
C
P
S
6-14 AWG
10-14 AWG CU Only
10-22 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
250 kcmil-6
CU-AL
CU-AL
CU-AL
CU-AL
CU-AL
• LFH60030FBC
• LFH60060FBC
100
130˚C
—
• LFH60100FBC
200
400
600
130˚C
130˚C
130˚C
—
—
—
—
—
—
(2) 350 kcmil-1/0
(2) 500 kcmil-4
Note: Reinforcing springs standard on all Class R fuse blocks.
*Covers sold individually. One cover needed for each pole.
Littelfuse.com
2 of 6
© 2013 Littelfuse POWR-GARD
®
Products
Rev: 011513
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