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
Leakage Current
Withstand Rating
0–600 A
<0.6 mA at 600 V
Class H: 10 kA RMS SYM
Class R: 200 kA RMS SYM
Materials:
Base
Thermoplastic
Fuse Clip
Box Lug
Tin plated copper alloy
Aluminum
Pressure Plate
Screw
Zinc plated steel
Zinc plated steel
Description
Flammability Rating
Approvals
UL94 V-0
The Littelfuse Class H/K5 and R blocks offer many benefits
such as indication, snap-to-release DIN rail mounting and
mounting flexibility for easier installation. 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.
UL Listed (File: E14721)
CSA Certified (File: LR7316)
RoHS Compliant, Lead (Pb) Free
Environmental
Recommended Fuses
Class H/K5 Blocks – 250V
NLN
Features/Benefits
ꢁꢀ
Accommodates a wide range of existing mounting
Class R Blocks – 250V
FLNR/FLNR_ID, KLNR, LLNRK
configurations
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 H/K5 Blocks – 600V
NLS
ꢁꢀ
ꢁꢀ
Class R fuse blocks
Covers available for 100 A and lower to enhance safety
Both hex and slot set screw options available on 60
Class R Blocks – 600V
FLSR/FLSR_ID, KLSR, LLSRK/LLSRK_ID, IDSR
ꢁꢀ
ꢁꢀ
Ampere, 600 Volt Class R box lugs
Web Resources
Sample requests, downloadable CAD drawings and other
technical information:
Littelfuse.com/lfh
Littelfuse.com/lfr
Littelfuse.com
© 2022 Littelfuse, Inc.
Rev: 081622
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