Technical Note POWR-BLOKS ™ Distribution Blocks with High Short-Circuit Current Ratings (SCCR) Distribution Block SCCR Ratings POWR-BLOKS POWRTM BLOK DESCRIPTION Littelfuse Catalog Number LS1300-1 LS1300-2 LS1300-3 LS1300-4 Rated Wire Range (openings) kcmil/AWG HIGH SCCR REQUIREMENTS Overcurrent Protection Fuse Required Class / Littelfuse Series / Max Amp Rating (3) Conductor Size Required (kcmil/AWG) (2) Poles Amps Line 1 2 3 4 Load Line 2-6 115 (1) 2 - 14 Load 2-6 SCCR, in RMS (1) CCMR, KLDR Sym Amps J T RK1 RK5 G CC JTD_ID JLLN or JLLS LLNRK or LLSRK_ID FLNR_ID or FLSR_ID SLC 200 200 200 100 60 30 100,000 or KLKR (1) 2 - 14 8 - 10 8 - 10 100 100 100 - 60 30 100,000 2-6 10 - 8 2-6 10 - 8 2-10 2-14 2-6 10 - 8 10 - 14 10 - 14 10 - 14 10 - 14 10 10-14 10 - 14 10 - 14 200 100 200 100 200 30 200 100 200 100 200 100 200 30 200 100 200 100 200 100 200 30 200 100 100 100 60 30 100 - 60 60 60 60 60 (100 kA) 60 (100 kA) 60 60 30 30 30 30 30 30 30 30 100,000 100,000 100,000 100,000 200,000 200,000 100,000 100,000 2/0 - 6 4 - 14 200 200 200 100 60 30 100,000 LD1400-1 1 115 (1) 2 - 14 (4) 10 - 16 LD1400-2 2 115 (1) 2 - 14 (4) 10 - 16 LFD14003 3 115 (1) 2 - 14 (4) 10 - 18 LD1400-4 4 115 (1) 2 - 14 (4) 10 - 16 LD2570-1DIN LD2570-2DIN LD2570-3DIN LS2572-1DIN LS2572-2DIN LS2572-3DIN LD2580-1DIN LD2580-2DIN LD2580-3DIN LD2970-1DIN LD2970-2DIN LD2970-3DIN LD0401-2 1 2 3 1 2 3 1 2 3 1 2 3 2 175 (1) 2/0 - 14 (4) 4 - 14 175 (1) 2/0 - 14 (1) 2/0 - 14 2/0 - 6 2/0 - 6 200 200 200 100 60 30 100,000 175 (1) 2/0 - 14 (6) 4 - 14 2/0 - 6 4 - 14 200 200 200 100 60 30 100,000 175 (1) 2/0 - 14 (4) 4 - 14 2/0 - 6 4 - 14 200 200 200 100 60 30 100,000 175 (1) 2/0 - 14 (6) 4 - 14 LFD04013 3 175 (1) 2/0 - 14 (6) 4 - 14 2/0 - 6 2/0 -10 str. 2/0 - 14 str. 10 - 14 sol. 4 - 14 4 - 10 str. 4 - 14 str. 10 - 14 sol. 200 200 30 30 200 200 30 30 200 200 30 30 100 100 30 30 60 (100 kA) 60 (100 kA) 30 30 30 30 200,000 200,000 200,000 200,000 LD0402-2 LD0402-3 2 3 175 (1) 2/0 -14 (4) 4 - 14 2/0 - 6 4 - 14 200 200 200 100 60 30 100,000 LD2570-1 1 175 (1) 2/0 - 14 (4) 4 - 14 2/0 - 6 4 - 14 200 200 200 100 60 30 100,000 2/0-10 2/0-14 2/0-10 2/0-14 4 - 10 4 - 14 4 - 10 4 - 14 200 30 200 30 200 30 200 30 200 30 200 30 100 30 100 30 60 (100 kA) 60 (100 kA) 60 (100 kA) 30 30 30 30 200,000 200,000 200,000 200,000 2/0 - 6 4 - 14 200 200 200 100 60 30 100,000 350 - 3/0 4-8 2/0 - 6 4 - 14 400 - 3/0 2/0 - 6 500-4 500-6 2-8 2 - 14 2 2 - 14 400 - 3/0 2-8 2 2/0 - 6 2 - 14 LFD35533 3 500-4 500-6 2 2 - 14 400 600 200 400 200 400 30 400 600 200 400 30 400 200 400 200 400 30 400 200 400 30 400 200 400 200 400 30 400 200 400 30 200 100 100 100 200 30 200 100 200 30 60 60 60 60 60 (100KA) 60 (100KA) 60 60 60 (100 kA) 60 (100 kA) 30 30 30 30 60 30 30 30 30 30 200,000 100,000 200,000 100,000 100,000 100,000 200,000 200,000 200,000 100,000 200,000 100,000 200,000 200,000 LD4560-1 LD4560-2 LD4560-3 LD3555-1 LD3555-2 1 2 3 1 2 400 - 3/0 2-8 400 400 400 200 60 30 100,000 2/0 - 6 2 - 14 200 200 200 100 60 30 100,000 LFD35553 3 2/0 - 2 4-6 2/0 - 4 2/0 - 14 4-8 10 - 14 2-4 4 - 14 400 200 400 30 400 200 400 30 400 200 400 30 100 100 200 30 60 60 60 (100 kA) 60 (100 kA) 30 30 30 30 100,000 100,000 200,000 200,000 LFD25702 2 175 (1) 2/0 - 14 (4) 4 - 14 LFD25703 3 175 (1) 2/0 - 14 (4) 4 - 14 LD2970-1 1 LD2970-2 2 175 (1) 2/0 - 14 (4) 4 - 14 LD2970-3 3 LD0404-2 2 LD0404-3 3 LD3552-1 LD3552-2 1 2 335 (1) 400 - 6 (4) 2 - 14 LFD35523 3 380 (1) 500 - 6 (4) 2 - 14 LD3553-1 1 335 (1) 400 - 6 (6) 2 - 14 310 LD3553-2 littelfuse.com (1) 350 - 6 (6) 4 - 14 380 (1) 500 - 6 (6) 2 - 14 335 (1) 400 - 6 (8) 2 - 14 350 (2) 2/0 - 14 (6) 4 - 14 350 (2) 2/0 - 14 (6) 4 - 14 2 © 2014 Littelfuse POWR-GARD® Distribution Block SCCR Ratings POWR-BLOKS POWRTM BLOK DESCRIPTION Littelfuse Catalog Number Rated Wire Range (openings) kcmil/AWG HIGH SCCR REQUIREMENTS Overcurrent Protection Fuse Required Class / Littelfuse Series / Max Amp Rating (3) Conductor Size Required (kcmil/AWG) (2) Poles Amps Line LD3955-1 LD3955-2 LD3955-3 1 2 3 LD3953-1 1 LD3953-2 LD3953-3 LD4551-1 LD4551-2 LD4551-3 LD5552-1 LD5552-2 2 3 1 2 3 1 2 Load 350 (2) 2/0 - 14 (6) 4 - 14 380 (1) 500 - 4 (6) 2 - 14 380 (1) 500 - 4 (6) 2 - 14 380 (1) 500 - 4 (12) 2 - 14 (12) 2 - 14 LFD5552-3 3 380 (1) 500 - 4 LD5579-1 LD5579-2 1 2 380 (1) 500 - 4 (6) 2/0 - 14 LFD5579-3 3 380 (1) 500 - 4 (6) 2/0 - 14 LD5594-1 LD5594-2 LD5594-3 LS4557-1 LS4557-2 LS4557-3 LD5586-1 1 2 3 1 2 3 1 380 (1) 500 - 4 (8) 2 - 14 420 (1) 600 - 4 (1) 600 - 4 LD5586-2 2 LFD5586-3 3 LD5592-1 1 LD5592-2 760 (2) 500 - 4 (8) 2/0 - 14 760 (2) 500 - 4 (8) 2/0 - 14 760 (2) 500 - 4 3 LD5986-1 LD5986-2 LD5986-3 LD5992-1 LD5992-2 1 2 3 1 2 LD5992-3 3 T RK1 RK5 G JTD_ID JLLN or JLLS LLNRK or LLSRK_ID FLNR_ID or FLSR_ID SLC SCCR, in RMS (1) CCMR, KLDR Sym Amps CC Line Load 2/0 - 2 4-8 400 400 400 100 60 30 100,000 4-6 10 - 14 200 200 200 100 60 30 100,000 500 - 3/0 2 - 10 500 - 3/0 2/0 - 4 2-8 2 - 14 600 400 400 200 600 400 400 200 600 400 400 200 200 200 100 60 60 60 30 30 30 50,000 100,000 100,000 100,000 500 - 3/0 2-8 600 600 400 200 60 30 100,000 2/0 - 4 500 - 3/0 2/0 - 4 500 - 4 500 - 4 500 - 3/0 2/0 - 4 500 - 4 500 - 4 500 - 3/0 2 - 14 2-8 2 - 14 2-4 2 - 14 2/0 - 6 8 - 14 2/0 - 4 2/0 - 14 2-8 200 400 200 600 30 400 200 400 30 600 200 400 200 600 30 400 200 400 30 600 200 400 200 400 30 400 200 400 30 400 100 200 100 200 30 100 100 200 30 200 60 60 60 60 60 (100 kA) 60 60 60 (100 kA) 60 (100 kA) 60 30 30 30 30 30 30 30 30 30 30 100,000 100,000 100,000 100,000 200,000 100,000 100,000 200,000 200,000 100,000 2/0 - 4 2 - 14 200 200 200 100 60 30 100,000 600 - 2 600 - 2 500-250 2/0 - 4 4/0 - 4 2/0 - 10 (2) 500 - 4 2-4 2/0 - 4 2 - 14 500 - 250 4-8 (12) 4 - 14 2 LFD5592-3 J or KLKR 600 600 - - - - 50,000 400 600 600 400 600 30 600 400 600 400 600 30 600 600 400 600 400 600 400 400 600 600 400 600 30 600 400 600 400 600 30 600 600 400 600 400 600 400 400 400 400 400 30 600 400 400 400 30 400 400 600 400 400 200 200 200 200 30 200 200 200 30 200 200 200 200 60 60 60 60 60 (100 kA) 60 60 60 60 (100 kA) 60 60 60 60 30 30 30 30 30 30 30 30 30 30 30 30 30 100,000 100,000 50,000 100,000 100,000 200,000 50,000 100,000 50,000 100,000 100,000 200,000 100,000 50,000 100,000 50,000 100,000 50,000 100,000 4/0 - 4 4 - 14 (2) 500 - 4 2-4 500 - 250 4 4 - 14 2/0 - 4 4/0 - 4 2/0 - 6 500 - 250 2-8 4/0 - 4 2 - 14 (6) 8 - 4 8-4 14-10 sol/str 80 - - - - - 100,000 (6) 14 - 4 8-2 14-4 sol/str 125 - - - - - 100,000 14-4 sol/str 14-4 sol/str 14-4 sol/str 14 - 6 (Top) 14 - 8 (Mid) 14 - 2 (Bot) 125 175 175 - - - - - 100,000 100,000 100,000 350 - - - - - 100,000 760 (2) 500 - 4 (12) 4 - 14 760 (2) 500 - 4 (8) 2/0 - 14 760 (2) 500 - 4 (12) 2 - 14 GDB Series GDB60801Z 1 80 GDB61151Z 1 115 GDB61153Z GDB61601Z GDB61753Z 3 1 3 115 160 175 GDB63101Z 1 310 (1) 8 - 4 (2) 1x 8 - 2 1x 10 - 6 (1) 8 - 2 (1) 8 - 2/0 (1) 8 - 2/0 (6) 14 - 4 8-2 (6) 14 - 4 8 - 2/0 (6) 14 - 4 8 - 2/0 (11) 2x 14 - 2 3/0 - 350 (1) 3/0 - 350 5x 14 - 6 4x 14 - 8 NOTE: The connectors were tested and approved at 90oC per UL 486 A/B - ampacity reflect 90oC column in Table 310-16 of NEC. (1) Short-circuit current ratings may be marked on the block or instructions provided with the terminal block (2) Size range of conductors necessary to maintain noted SCCR (3) Maximum size of line side overcurrent protection to provide noted SCCR © 2014 Littelfuse POWR-GARD® 3 littelfuse.com For more information, visit littelfuse.com/PowrBloks Additional technical information and application data for Littelfuse fuses, protection relays and other circuit protection and safety products can be found on littelfuse.com. For questions, contact our Technical Support Group (800-TEC-FUSE). Specifications, descriptions and illustrative material in this literature are as accurate as known at the time of publication, but are subject to changes without notice. © 2014 Littelfuse, Inc. Form: PFD541 Rev: 3-A-072414