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
0-600 A
<0.6 mA at 600 V
Class H: 10 kA RMS SYM
Class R: 200 kA RMS SYM
Ampere Ratings
Leakage Current
Withstand Rating
Flammability Rating UL94 V-0
Approvals
UL Listed (File: E14721)
CSA Certified (File: LR7316)
Environmental
RoHS Compliant, Lead (Pb) Free
Description
Web Resources
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.
Sample requests, downloadable CAD drawings and other
technical information: Littelfuse.com/lfh
Littelfuse.com/lfr
Littelfuse.com/fuseblocks
Recommended Fuses
Class H/K5 Blocks – 250V
NLN, RLN
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
Class R Blocks – 250V
FLNR/FLNR_ID, KLNR, LLNRK
Class H/K5 Blocks – 600V
NLS, RLS
Class R Blocks – 600V
FLSR/FLSR_ID, KLSR, LLSRK/LLSRK_ID, IDSR
•ꢀ Covers available for 100 A and lower to enhance safety
Ordering Information (Class H 250 V)
ordering number
baSe
temp
CoVer
ordering
number*
amp
rating
Wire
din
SuFFix
box preSSure
torque
Wire type
baSe part
number
range
raiL
rating
SCreW
Lug
C
pLate
P
P
1
2
3
1
2
3
LFH250301
LFH250302
LFH250303
LFH250601
LFH250602
LFH250603
S
S
S
—
—
—
C
P
S
6-14 AWG
10-14 AWG CU Only
10-22 AWG
30
60
C
2.8 N-m (25 in-lbs)
125˚C
125˚C
•
•
—
LFH25030FBC
LFH25060FBC
C
P
CID
CID
CID
—
—
—
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
2-4 AWG
CU-AL
•
6-14 AWG
13.6 N-m (120 in-lbs)
4.5 N-m (40 in-lbs)
4.0 N-m (35 in-lbs)
2/0-6 AWG
1
3
LFH251001
LFH251003
CID
CID
—
—
—
—
Solid/
Stranded
100
8 AWG
CU-AL
130˚C
—
•
LFH25100FBC
10-14 AWG
1
3
1
3
1
3
LFH252001
LFH252003
LFH254001
LFH254003
LFH256001
LFH256003
C
C
C
C
C
C
—
—
—
—
—
—
—
—
—
—
—
—
200
400
600
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
250 kcmil-6
CU-AL
CU-AL
CU-AL
130˚C
130˚C
130˚C
—
—
—
—
—
—
—
—
—
(2) 350 kcmil-1/0
(2) 500 kcmil-4
Note: Reinforcing springs standard on all Class H fuse blocks. *Covers sold individually. One cover needed for each pole.
© 2013 Littelfuse POWR-GARD® Products
Rev: 011513
1 of 6
Littelfuse.com