NLN/NLS Class K5 Fuses 250/600 VAC ■ “ONE-TIME” ■ 1 – 600 Amperes SPECIFICATIONS Voltage ratings: AC: 250 Volts 600 Volts DC: 250 Volts 400 Volts 500 Volts (NLN, NLKP) (NLS) (NLN) (NLS 35 – 60A) (NLS 8 – 15A) (NLS 225 – 600A) 600 Volts (NLS 1 – 7A) (NLS 20 – 30A) (NLS 70 – 200A) GENERAL PURPOSE FUSES 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 “Type P” requirements. ** Excludes NLN 15 – 60A AMPERE RATINGS 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 residential and smaller commercial and industrial applications. 1 2 3 4 5 6 7 8 10 12 * 15 * 20 * 25 * 30 * 35 * 40 * 45 * 50 * 60 70 80 90 100 110 125 150 175 200 225 250 300 350 400 450 500 600 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. * NLKP series available only in those amperages preceded by an asterisk. However, to obtain the added benefits of time-delay, currentlimitation, and higher interrupting rating, consider the use of POWR-PRO® IDSR IndicatorTM 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. RECOMMENDED FUSE BLOCKS 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. 34 Example part number (series & amperage): NLS 125 LH250 series (for NLN and NLKP series fuses) LH600 series (for NLS series fuses) Refer to Fuse Block section of this catalog for additional information. 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-PROTM IDSR IndicatorTM fuses and FLNR/FLSR series fuses provide superior protection for all motor and general purpose circuits containing inductive loads. NLN/NLS Class K5 Fuses ■ “ONE-TIME” ■ 1 – 600 Amperes A C B — — — NLS 5 (127.0) 3/4 (19.1) 5/8 (15.9) 13/16 (20.6) — — — NLN NLKP 3 (76.2) 3/4 (19.1) 5/8 (15.9) 13/16 (20.6) — — — NLS 5-1/2 (139.7) 1 (25.4) 5/8 (15.9) 1-1/16 (27.0) — — — NLN 5-7/8 (149.2) 1 (25.4) 1 (25.4) 1-1/16 (27.0) 1/8 (3.2) 3/4 (19.1) 1-5/16 (33.3) NLS 7-7/8 (200.0) 1-1/4 (31.8) 1 (25.4) 1-5/16 (33.3) 1/8 (3.2) 3/4 (19.1) 1-9/16 (39.7) NLN 7-1/8 (181.0) 1-1/2 (38.1) 1-3/8 (34.9) 1-9/16 (39.7) 3/16 (4.8) 1-1/8 (28.6) 1-7/8 (47.6) NLS 9-5/8 (244.5) 1-3/4 (44.5) 1-3/8 (34.9) 1-27/32 (46.8) 3/16 (4.8) 1-1/8 (28.6) 2-3/32 (53.2) NLN 8-5/8 (219.1) 2 (50.8) 1-7/8 (47.6) 2-3/32 (53.2) 1/4 (6.4) 1-5/8 (41.3) 2-13/32 (61.1) NLS 11-5/8 (295.3) 2-1/2 (63.5) 1-7/8 (47.6) 2-19/32 (65.9) 1/4 (6.4) 1-5/8 (41.3) 2-7/8 (73.0) NLN 10-3/8 (263.5) 2-1/2 (63.5) 2-1/4 (57.2) 2-19/32 (65.9) 1/4 (6.4) 2 (50.8) 2-7/8 (73.0) NLS 13-3/8 (339.7) 3 (76.2) 2-1/4 (57.2) 3-3/32 (78.6) 1/4 (6.4) 2 (50.8) 3-7/16 (87.3) NLS 600 400 400 300 300 200 200 100 80 100 80 60 60 40 40 30 30 20 20 TIME IN SECONDS 1000 800 600 TIME IN SECONDS 1000 800 10 8 6 4 3 2 1 .8 10 8 6 4 3 2 1 .8 100000 80000 60000 40000 30000 20000 10000 8000 6000 4000 3000 2000 1000 800 600 400 300 200 100 80 60 30 20 40 10 8 6 5 100000 80000 60000 40000 30000 20000 10000 8000 6000 4000 3000 2000 1000 800 .01 600 .02 .01 400 .03 .02 300 .03 200 .06 .05 .04 100 80 .04 60 .1 .08 .06 30 .2 .1 .08 20 .3 .2 40 .4 .3 10 8 .6 .4 6 5 .6 CURRENT IN AMPERES 600A G 9/16 (14.3) 400A F 1/2 (12.7) 400A 60A 100A 30A 15A 20A 25A NLN E 1/2 (12.7) 200A 2 450 – 600 D 2 (50.8) 200A 2 225 – 400 C NLN NLKP 60A 2 110 – 200 B 15A 20A 25A 30A 2 A 600A 1 70 – 100 GENERAL PURPOSE FUSES DIMENSIONS IN INCHES (mm in parentheses) SERIES 1 35 – 60 G D FIG. 2 REFER TO FIG. NO. 1 – 30 F B FIG. 1 AMPERES E A D C 100A 250/600 VAC CURRENT IN AMPERES 35