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 Class R: 200 kA RMS SYM Materials: Base Thermoplastic Fuse Clip Tin plated copper alloy Box Lug Aluminum Pressure Plate Zinc plated steel Screw Zinc plated steel Flammability Rating UL94 V-0 Approvals UL Listed (File: E14721) CSA Certified (File: LR7316) Environmental RoHS Compliant, Lead (Pb) Free Description The Littelfuse Class H/K5 and R blocks offer many benefits Recommended Fuses such as indication, snap-to-release DIN rail mounting and mounting flexibility for easier installation. Class H and Class Class H/K5 Blocks 250 V R fuse blocks are dimensionally the same, but Class R blocks NLN incorporate a rejection feature, which only allows Class R Class R Blocks 250 V fuses to be inserted. FLNR/FLNR ID, KLNR, LLNRK Class H/K5 Blocks 600 V NLS Features/Benefits Class R Blocks 600 V Accommodates a wide range of existing mounting FLSR/FLSR ID, KLSR, LLSRK/LLSRK ID, IDSR configurations Indication offered on most 250 V and 600 V versions Web Resources One hand release from DIN rail for ferrule style fuses Reinforced fuse clips are standard on all Class H and Sample requests, downloadable CAD drawings and other Class R fuse blocks technical information: Li ttelfuse.com/lfh Covers available for 100 A and lower to enhance safety Littelfuse.com/lfr Both hex and slot set screw options available on 60 Ampere, 600 Volt Class R box lugs Ordering Information (Class H 250 V) ORDERING NUMBER BASE COVER AMP WIRE DIN SUFFIX TORQUE WIRE TYPE TEMP ORDERING BASE PART RATING RANGE RAIL BOX PRESSURE RATING NUMBER* NUMBER SCREW LUG PLATE 1 LFH250301 C P S C 6-14 AWG 30 2 LFH250302 C P S 2.8 N-m (25 in-lbs) P 10-14 AWG CU Only 125 C LFH25030FBC 3 LFH250303 C P S S 10-22 AWG 1 LFH250601 CID 5.6 N-m (50 in-lbs) 2-4 AWG 60 2 LFH250602 CID CU-AL 125 C LFH25060FBC 2.8 N-m (25 in-lbs) 6-14 AWG 3 LFH250603 CID 13.6 N-m (120 in-lbs) 2/0-6 AWG 1 LFH251001 CID Solid/ 100 4.5 N-m (40 in-lbs) 8 AWG CU-AL 130 C LFH25100FBC Stranded 3 LFH251003 CID 4.0 N-m (35 in-lbs) 10-14 AWG 1 LFH252001 C 200 31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130 C 3 LFH252003 C 1 LFH254001 C 400 31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130 C 3 LFH254003 C 1 LFH256001 C 600 42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130 C 3 LFH256003 C Note: Reinforcing springs standard on all Class H fuse blocks. *Covers sold individually. One cover needed for each pole. Littelfuse.com 2021 Littelfuse, Inc. 1 of 6 Rev: 010821 POLES TERMINAL INDICATION POWR-GARD Blocks and Holders Datasheet LF SERIES CLASS H/K5 AND R FUSE BLOCKS Ordering Information (Class H 600 V) ORDERING NUMBER BASE SNAP COVER AMP WIRE SUFFIX BASE TORQUE WIRE TYPE TEMP TO ORDERING RATING RANGE ORDERING BOX PRESSURE RATING RELEASE NUMBER* SCREW NUMBER LUG PLATE 1 LFH600301 CID PID SID C 6-14 AWG 30 2 LFH600302 CID PID SID 2.8 N-m (25 in-lbs) P 10-14 AWG CU Only 130C LFH60030FBC 3 LFH600303 CID PID SID S 10-22 AWG 1 LFH600601 CID 5.6 N-m (50 in-lbs) 2-4 AWG 60 2 LFH600602 CID CU-AL 130C LFH60060FBC 2.8 N-m (25 in-lbs) 6-14AWG 3 LFH600603 CID 13.6 N-m (120 in-lbs) 2/0-6AWG 1 LFH601001 CID Solid/ 100 4.5 N-m (40 in-lbs) 8 AWG CU-AL 130C LFH60100FBC Stranded 3 LFH601003 CID 4.0 N-m (35 in-lbs) 10-14 AWG 1 LFH602001 C 200 31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130C 3 LFH602003 C 1 LFH604001 C 400 31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130C 3 LFH604003 C 1 LFH606001 C 600 42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130C 3 LFH606003 C Note: Reinforcing springs standard on all Class H fuse blocks. Ordering Information (Class R 250 V) ORDERING NUMBER BASE SNAP COVER AMP WIRE SUFFIX BASE TORQUE WIRE TYPE TEMP TO ORDERING RATING RANGE ORDERING BOX PRESSURE RATING RELEASE NUMBER* SCREW NUMBER LUG PLATE 1 LFR250301 C P S C 6-14 AWG 30 2 LFR250302 C P S 2.8 N-m (25 in-lbs) P 10-14 AWG CU Only 125C LFH25030FBC 3 LFR250303 C P S S 10-22 AWG 1 LFR250601 CID 5.6 N-m (50 in-lbs) 2-4 AWG 60 2 LFR250602 CID CU-AL 125C LFH25060FBC 2.8 N-m (25 in-lbs) 6-14 AWG 3 LFR250603 CID 13.6 N-m (120 in-lbs) 2/0-6 AWG 1 LFR251001 CID Solid/ 100 4.5 N-m (40 in-lbs) 8 AWG CU-AL 130C LFH25100FBC Stranded 3 LFR251003 CID 4.0 N-m (35 in-lbs) 10-14 AWG 1 LFR252001 C 200 31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130C 3 LFR252003 C 1 LFR254001 C 400 31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130C 3 LFR254003 C 1 LFR256001 C 600 42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130C 3 LFR256003 C Note: Reinforcing springs standard on all Class R fuse blocks. Ordering Information (Class R 600 V) ORDERING NUMBER BASE SNAP COVER SUFFIX WIRE BASE TORQUE WIRE TYPE TEMP TO ORDERING BOX BOX RANGE ORDERING PRES SURE RATING RELEASE NUMBER* LUG LUG SCREW NUMBER PLATE HEX SLOT 1 LFR600301 CID PID SID C 6-14 AWG 30 2 LFR600302 CID PID SID 2.8 N-m (25 in-lbs) P 10-14 AWG CU Only 130 C LFH60030FBC 3 LFR600303 CID PID SID S 10-22 AWG 1 LFR600601 CID-HX CID 5.6 N-m (50 in-lbs) 2-4 AWG 60 2 LFR600602 CID-HX CID CU-AL 130 C LFH60060FBC 2.8 N-m (25 in-lbs) 6-14AWG 3 LFR600603 CID-HX CID 13.6 N-m (120 in-lbs) 2/0-6AWG 1 LFR601001 CID Solid/ 100 4.5 N-m (40 in-lbs) 8 AWG CU-AL 130 C LFH60100FBC Stranded 3 LFR601003 CID 4.0 N-m (35 in-lbs) 10-14 AWG 1 LFR602001 C 200 31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130 C 3 LFR602003 C 1 LFR604001 C 400 31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130 C 3 LFR604003 C 1 LFR606001 C 600 42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130 C 3 LFR606003 C Note: Reinforcing springs standard on all Class R fuse blocks. *Covers sold individually. One cover needed for each pole. Littelfuse.com 2021 Littelfuse, Inc. 2 of 6 Rev: 010821 AMP RATING POLES POLES POLES TERMINAL TERMINAL TERMINAL INDICATION INDICATION INDICATION