Blocks and Holders. Ordering Information

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1 FuSE blocks OVERVIEW Description Littelfuse offers a comprehensive line of fuse blocks that incorporate many benefits such as indication, snap torelease, DIN-Rail mounting and universal mounting holes. 5. Select the type of wire termination Three types of wire termination are available: *for use with spade lugs or ring terminals with Pressure Plate*for use with solid or stranded wire without terminal. Recommended where vibration will be a factor Box Lugfor use with all types of solid wire and lass B and lass stranded wire. The most durable, but not for use with welding cable or other rope-stranded conductors. * 4 Quick onnect terminals rated for up to 20 amperes are available on the Midget and lass fuse blocks. New Options Available Reduced FootprintSave space with designs up to 5% smaller in width Increase safety and reduce downtime with built-in local neon indication Universal Mounting HolesSimplify replacement with universal mounting options DIN Rail MountableEase installation with a 5 mm hat DIN Rail mounting option One-Hand ReleaseSave time by using only one hand for a simple release from DIN Rail Fuse Block Selection The following guidelines should help simplify the selection of proper fuse blocks:. Determine the system voltagesince fuses are selected on the basis of sys tem voltage, fuse blocks are selected to match the voltage rating of the fuse. 2. Determine the design short-circuit currentif available short-circuit current cannot be determined, or if it will vary with equip ment location, select fuses with a,000 ampere interrupting rating (A.I.R.) and mating fuse blocks with a withstand rating of,000 amperes for maximum safety. w th Pressure P ate (P) (S). Decide on the number of poles in each blockthe number of poles for each set of fuses is determined by the characteristics of the circuit. 7. Determine if block should be DIN Rail mountedmany of the new Littelfuse fuse blocks are DIN Rail mountable. Be sure to look to corresponding tables to match the correct part number on the following product pages. 8. Determine if fuse clips need to be re in forced Fuse clips may have a tendency to lose some of their tension over a period of time. This may be prevented by specifying reinforced fuse clips. Ordering Information Box Lug () The Littelfuse fuse block part number con sists of the below skeleton. Please refer to UL lass Tables for specific information.. Determine the type and ampere rating of the fuse to be usedthe fuse ampere rating, opening characteristics (fast acting or time-delay) and size are important considerations in fuse selection. Fuse blocks may be used with a fuse rated at the corresponding amperage rating or below. For example, a fuse block rated at 0 amperes may be used with a fuse rated from 0 to 0 amperes. 4. Determine if NE, SA, UL, or other requirements are applicableany of these requirements should be obtained from the approving agency in advance of fuse and fuse block selection. For all lass R, H, J, and T Fuse blocks For all lass, G, and Midget-Style These new fuse blocks replace previous Littelfuse fuse blocks that had very similar part numbers for customer convenience. The only change is an F has been added as the second character in the new block part numbers. aution: Littelfuse indicating fuse holders are intended to quickly identify open fuses while power is still applied. Only qualified electrically trained technicians should replace fuses and follow standard OSHA and NFPA 70E safe work practices, such as Lock-Out and Tag-Out procedures and verification before replacing any fuses in indicating fuse holders. 202 Littelfuse POWR-GARD Products atalog 8

2 LF Series Indicating Fuse Blocks Smaller Footprint Provides Space Savings DIN-Rail Mounting Eases Installation Improves Functionality An of Value The Littelfuse and overs offer generous space savings and a greater value over previous generations. View the different series classes for available indication, snap-to-release DIN rail mounting, universal mounting holes and touch-safe covers Littelfuse POWR-GARD Products atalog

3 LF Series lass H/K5 and r Fuse blocks 250 V 00 V Description The Littelfuse lass H/K5 and R blocks offer many benefits such as indication, snap-to-release DIN rail mounting and universal mounting holes. lass H and lass R fuse blocks are dimensionally the same, but lass R blocks incorporate a rejection feature, which only allows lass R fuses to be inserted. Features/Benefits Universal mounting holes for easy replacement offered on most 250 V and 00 V versions One hand release from DIN rail for ferrule style fuses Reinforced fuse clips are standard on all lass H and lass R fuse blocks overs available for 00 A and lower to enhance safety Web Resources Sample requests, downloadable AD drawings and other technical information: /lfh /lfr /fuseblocks Ordering Information (lass H 250 V) Specifications Voltage ere s Leakage urrent Withstand 250 V, 00 V 0-00 A <0. ma at 00 V lass H: 0 ka RMS SYM lass R: ka RMS SYM Flammability UL94 V-0 Approvals UL Listed (File No. E472) SA ertified (File No. LR7) Environmental Recommended Fuses RoHS ompliant, Lead (Pb) Free lass H/K5 Blocks 250 V NLN... 2 RLN lass R Blocks 250 V FLNR/FLNR_ID... 8 KLNR... 5 LLNRK... 4 lass H/K5 Blocks 00 V NLS... 2 RLS lass R Blocks 00 V FLSR/FLSR_ID... 8 KLSR... 5 LLSRK/LLSRK_ID... 4 IDSR part Box pressure number Lug Plate LFH2500 P S -4 AWG 2 LFH25002 P S 2.8 N-m (25 in-lbs) P 0-4 AWG LFH2500 P S S 0-22 AWG LFH2500 ID 5. N-m (50 in-lbs) 2-4 AWG 2.8 N-m (25 in-lbs) -4 AWG 2 LFH25002 ID LFH2500 ID LFH2500 LFH2500 ID ID. N-m (20 in-lbs) 2/0- AWG 4.5 N-m (40 in-lbs) 8 AWG 4.0 N-m (5 in-lbs) 0-4 AWG Type U Only DIN Rail OVer 25 LFH2500FB U-AL 25 LFH2500FB U-AL 0 LFH2500FB LFH25 LFH25. N-m (275 in-lbs) 250 kcmil- U-AL 0 LFH25 LFH25. N-m (275 in-lbs) (2) 50 kcmil-/0 U-AL 0 LFH LFH N-m (75 in-lbs) (2) 500 kcmil-4 U-AL 0 Note: Reinforcing springs standard on all lass H fuse blocks. *overs sold individually. One cover needed for each pole Littelfuse POWR-GARD Products atalog

4 LF Series lass H/K5 And R Fuse blocks Ordering Information (lass H 00 V) LFH000 ID PID SID -4 AWG 2 LFH0002 ID PID SID 2.8 N-m (25 in-lbs) P 0-4 AWG LFH000 ID PID SID S 0-22 AWG LFH000 ID 5. N-m (50 in-lbs) 2-4 AWG 2 LFH0002 ID LFH000 ID 2.8 N-m (25 in-lbs) -4AWG LFH000 LFH000 ID ID Note: Reinforcing springs standard on all lass H fuse blocks. Note: Reinforcing springs standard on all lass R fuse blocks. Note: Reinforcing springs standard on all lass R fuse blocks. *overs sold individually. One cover needed for each pole. LFH0 LFH0 LFH0 LFH0 LFH000 LFH000 Ordering Information (lass R 250 V) Terminal Type U Only Snap to release OVer 0 LFH000FB U-AL 0 LFH000FB. N-m (20 in-lbs) 2/0-AWG 4.5 N-m (40 in-lbs) 8 AWG U-AL 0 LFH000FB 4.0 N-m (5 in-lbs) 0-4 AWG. N-m (275 in-lbs) 250 kcmil- U-AL 0. N-m (275 in-lbs) (2) 50 kcmil-/0 U-AL N-m (75 in-lbs) (2) 500 kcmil-4 U-AL 0 Snap OVer Type to release LFR2500 P S -4 AWG 2 LFR25002 P S 2.8 N-m (25 in-lbs) P 0-4 AWG U Only 25 LFH2500FB LFR2500 P S S 0-22 AWG LFR2500 ID 5. N-m (50 in-lbs) 2-4 AWG 2 LFR25002 ID LFR2500 ID 2.8 N-m (25 in-lbs) -4 AWG U-AL 25 LFH2500FB ID. N-m (20 in-lbs) 2/0- AWG LFR N-m (40 in-lbs) 8 AWG U-AL LFR2500 ID 4.0 N-m (5 in-lbs) 0-4 AWG 0 LFH2500FB LFR25 LFR25. N-m (275 in-lbs) 250 kcmil- U-AL 0 LFR25 LFR25. N-m (275 in-lbs) (2) 50 kcmil-/0 U-AL 0 LFR2500 LFR N-m (75 in-lbs) (2) 500 kcmil-4 U-AL 0 Ordering Information (lass R 00 V) LFR000 ID PID SID -4 AWG 2 LFR0002 ID PID SID 2.8 N-m (25 in-lbs) P 0-4 AWG LFR000 ID PID SID S 0-22 AWG LFR000 ID 5. N-m (50 in-lbs) 2-4 AWG 2 LFR0002 ID LFR000 ID 2.8 N-m (25 in-lbs) -4 AWG Type U Only Snap to release OVer 0 LFH000FB U-AL 0 LFH000FB. N-m (20 in-lbs) 2/0- AWG LFR000 ID 4.5 N-m (40 in-lbs) 8 AWG U-AL LFR000 ID 4.0 N-m (5 in-lbs) 0-4 AWG 0 LFH000FB LFR0 LFR0. N-m (275 in-lbs) 250 kcmil- U-AL 0 LFR0 LFR0. N-m (275 in-lbs) (2) 50 kcmil-/0 U-AL 0 LFR000 LFR N-m (75 in-lbs) (2) 500 kcmil-4 U-AL Littelfuse POWR-GARD Products atalog 87

5 LASS H/K5 AND R FuSE blocks Dimensions mm (inches) 00 V 0 A 8.4 [.5] 2.5 [.85] 7. [2.88] 9.2 [.7] 5. [2.0].8 [.] 4. [.2].4 [.25] 07.9 [4.25] 8.4 [.40] 75.9 [2.99] 52.5 [2.07] 20.7 [.82].7 [.5] 27. [5.00] 8. [4.7] 5.0 [2.20] 47. [.87] R.4 [.] R2. [.0] 00 V 0 A 2.4 [.28] 29.8 [.7] 9.9 [.78].4 [.45] 4.8 [.7] 8. [.29] 2.2 [4.85] 9.5 [2.74] 09. [4.0] 59. [2.5] 99.4 [.9] 59.7 [2.5] 22.9 [.90] 84.2 [7.25] 4. [5.0] 55.2 [2.8] 74.2 [2.92] R.4 [.].2 THRU V 00 A 8 [ ] 9 [ 77] 5 0 [ 59] 5 4 [2 0] 45 [5 72] 25 7 [4 95] 07 0 [4 2] 79 8 [ 4] 0 [2 40] 0 [2 0] 22 9 [ 90] 4 [2 54] R 4 [ ] 72 8 [ 80] 228 [9 00] Littelfuse POWR-GARD Products atalog