Littelfuse LFR Series - Manual

Littelfuse.com
POWR-GARD ® Blocks and Holders Datasheet
1 of 6 © 2013 Littelfuse POWR-GARD ® Products
Rev: 011513
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
Littelfuse.com/fuseblocks
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
Note: Reinforcing springs standard on all Class H fuse blocks. *Covers sold individually. One cover needed for each pole.
Ordering Information (Class H 250 V)
amp
rating
po
Le
S
ordering number
torque
termina
L
Wire
range
Wire type
baSe
temp
rating
din
raiL
indi
Ca
tion
CoVer
ordering
number*
baSe part
number
SuFFix
box
Lug
preS Sure
pLate
SCreW
30
1 LFH250301 C P S
2.8 N-m (25 in-lbs)
C 6-14 AWG
CU Only
Solid/
Stranded
125˚C • — LFH25030FBC 2 LFH250302 C P S P 10-14 AWG
3 LFH250303 C P S S 10-22 AWG
60
1 LFH250601 CID — —
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs) 2-4 AWG
6-14 AWG
CU-AL 125˚C • • LFH25060FBC 2 LFH250602 CID — —
3 LFH250603 CID — —
100
1
3
LFH251001
LFH251003
CID
CID
—
—
—
—
13.6 N-m (120 in-lbs) 2/0-6 AWG
CU-AL 130˚C — • LFH25100FBC 4.5 N-m (40 in-lbs) 8 AWG
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 — —