ampere ratings * nlkp series available only in those amperages preceded by an asterisk. example part number (series & amperage): nls 125 recommended fuse blocks lh250 series (for nln and nlkp series fuses) lh600 series (for nls series fuses) refer to fuse block section of this catalog for additional infor- mation. 34 general purpose fuses nln/nls class k5 fuses 250/600 vac one-time 1 600 amperes nln and nls series fuses provide low cost protection for general purpose feeder and branch circuits when available short circuit currents are less than 50,000 amperes. they replace all class h fuses which have only a 10,000 ampere interrupting rating. they are suitable for use in many residen- tial and smaller commercial and industrial applications. nlkp series fuses are canadian code fuses specifically designed to meet canadian electrical code type p fuse requirements for residential use. they have a 10,000 ampere interrupting rating. however, to obtain the added benefits of time-delay, current- limitation, and higher interrupting rating, consider the use of powr-pro idsr indicator tm fuses for circuits between 250 and 600 volts. the user gets all the benefits of time-delay rk5 fuses plus the added benefits of an indicating fuse that tells when it has opened. complete information on these fuses may be found in the powr-pro section of this catalog. for circuits up to 250 volts, see flnr fuses in this section of the catalog. applications general purpose residential and commercial circuits with little or no motor load. resistive heating loads. economical for use in applications where lowest initial cost is the major consideration. safety 50,000 a.i.r., class k5 adequate interrupting capacity for residences and many smaller facilities. specifications voltage ratings: ac: 250 volts (nln, nlkp) 600 volts (nls) dc: 250 volts (nln) 400 volts (nls 35 60a) 500 volts (nls 8 15a) (nls 225 600a) 600 volts (nls 1 7a) (nls 20 30a) (nls 70 200a) interrupting ratings: ac: 50,000 amperes rms symmetrical (nln/nls) 10,000 amperes (nlkp) dc: 20,000 amperes (nln/nls 1 60a) 50,000 amperes (nln/nls 70 600a) ampere range: 1 600 amperes (nln/nls) 15 60 amperes (nlkp) approvals: nln/nls: ul listed class k5 per ul 248 (formerly ul 198d) (file no. e81895) nlkp: ul listed class h (file no. e81895) nln**/nls/nlkp: csa certified per spec no. 59.1 (file no. lr29865) ?nlkp series fuses meet csa ?ype p requirements. ** excludes nln 15 60a note: nlkp series fuses have limited interrupting rating and should be used only where available short circuit current is known to be less than the fuse interrupting rating. where available fault current is unknown, where it exceeds nln/nls interrupting rating, or where it may increase in the future, 200,000 ampere interrupting rating littelfuse powr-pro tm idsr indicator tm fuses and flnr/flsr series fuses provide superior protection for all motor and general purpose circuits containing inductive loads. 1 7 * 25 * 60 125 300 2 8 * 30 70 150 350 3 10 * 35 80 175 400 4 12 * 40 90 200 450 5 * 15 * 45 100 225 500 6 * 20 * 50 110 250 600
35 general purpose fuses current in amperes time in seconds nls 600a .01 .02 .03 .04 .05 .06 .08 .1 .2 .3 .4 .6 .8 1 2 3 4 6 8 10 20 30 40 60 80 100 200 300 400 600 800 1000 5 100 80 60 40 30 20 10 8 6 100000 80000 60000 40000 30000 20000 10000 8000 6000 4000 3000 2000 1000 800 600 400 300 200 400a 200a 100a 60a 30a 25a 20a 15a time in seconds current in amperes nln .01 .02 .03 .04 .06 .08 .1 .2 .3 .4 .6 .8 1 2 3 4 6 8 10 20 30 40 60 80 100 200 300 400 600 800 1000 5 100 80 60 40 30 20 10 8 6 100000 80000 60000 40000 30000 20000 10000 8000 6000 4000 3000 2000 1000 800 600 400 300 200 200a 100a 400a 600a 60a 30a 25a 20a 15a nln/nls class k5 fuses 250/600 vac one-time 1 600 amperes nln nlkp nls nln nlkp nls nln nls nln nls nln nls nln nls 1 1 2 2 2 2 1 30 35 60 70 100 110 200 225 400 450 600 amperes refer to fig. no. series dimensions in inches (mm in parentheses) abcdefg 2 1/2 1/2 9/16 (50.8) (12.7) (12.7) (14.3) 5 3/4 5/8 13/16 (127.0) (19.1) (15.9) (20.6) 3 3/4 5/8 13/16 (76.2) (19.1) (15.9) (20.6) 5-1/2 1 5/8 1-1/16 (139.7) (25.4) (15.9) (27.0) 5-7/8 1 1 1-1/16 1/8 3/4 1-5/16 (149.2) (25.4) (25.4) (27.0) (3.2) (19.1) (33.3) 7-7/8 1-1/4 1 1-5/16 1/8 3/4 1-9/16 (200.0) (31.8) (25.4) (33.3) (3.2) (19.1) (39.7) 7-1/8 1-1/2 1-3/8 1-9/16 3/16 1-1/8 1-7/8 (181.0) (38.1) (34.9) (39.7) (4.8) (28.6) (47.6) 9-5/8 1-3/4 1-3/8 1-27/32 3/16 1-1/8 2-3/32 (244.5) (44.5) (34.9) (46.8) (4.8) (28.6) (53.2) 8-5/8 2 1-7/8 2-3/32 1/4 1-5/8 2-13/32 (219.1) (50.8) (47.6) (53.2) (6.4) (41.3) (61.1) 11-5/8 2-1/2 1-7/8 2-19/32 1/4 1-5/8 2-7/8 (295.3) (63.5) (47.6) (65.9) (6.4) (41.3) (73.0) 10-3/8 2-1/2 2-1/4 2-19/32 1/4 2 2-7/8 (263.5) (63.5) (57.2) (65.9) (6.4) (50.8) (73.0) 13-3/8 3 2-1/4 3-3/32 1/4 2 3-7/16 (339.7) (76.2) (57.2) (78.6) (6.4) (50.8) (87.3) a c c d a e b b fd g fig. 1 fig. 2
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