ONE-TIME OT/OTN/OTS CLASS K-5 FOR VERSATILITY AND ECONOMY, THESE GENERAL PURPOSE FUSES ARE HARD TO BEAT OT, OTN and OTS general purpose fuses provide low cost protection for feeder and branch circuits serving lighting, heating, and other non-motor loads. OT, OTN and OTS fuses will safely interrupt available short circuit currents up to 50,000 amperes in all ratings. OT, OTN and OTS fuses are not rejection fuses - care should be taken to ensure that replacement fuses do not have lower interrupting ratings than original fuses. OTN 15 through 60 satisfy the Canadian electrical code requirement for Type "P," low melting-point, non-time delay fuses. Features / Benefits Easy to read imprint label for quick recognition and replacement Low cost for high protection value HIGHLIGHTS: APPLICATIONS: Versatile Lowest cost protection for circuits serving non-inductive loads Ratings Feeders Branch Circuits Resistive Heating Residential and Small Commercial Installations OT AC: 1 to 600A 250VAC, 50kA I.R. OTN (Canada) AC: 15 to 60A 250VAC, 50kA I.R. OTS AC: 1 to 600A 600VAC, 50kA I.R. B 30 Approvals UL Listed to Standard 248-9 CSA Certified to Standard C22.2 No. 248.9* * The Canadian Electrical Code requires these fuses in ratings 15 through 60A to be of the low melting point design use OTN 15-60. ONE-TIME GENERAL PURPOSE / CLASS K-5 FUSES OT/OTN/OTS Standard Fuse Ampere Ratings, Catalog Numbers Ampere Rating Catalog Number 250V 600V Ampere Rating Catalog Number 250V 600V Ampere Rating Catalog Number 250V 600V 1 2 3 4 OT1 OT2 OT3 OT4 OTS1 OTS2 OTS3 OTS4 30 35 40 45 OT30, OTN30* OT35, OTN35* OT40, OTN40* OT45, OTN45* OTS30 OTS35 OTS40 OTS45 125 150 175 200 OT125 OT150 OT175 OT200 OTS125 OTS150 OTS175 OTS200 5 6 7 8 OT5 OT6 OT7 OT8 OTS5 OTS6 OTS7 OTS8 50 60 65 70 OT50, OTN 50* OT60, OTN60* OT65 OT70 OTS50 OTS60 OTS65 OTS70 225 250 300 350 OT225 OT250 OT300 OT350 OTS225 OTS250 OTS300 OTS350 10 12 15 20 25 OT10 OT12 OT15, OTN15* OT20, OTN20* OT25, OTN 25* OTS10 OTS12 OTS15 OTS20 OTS25 75 80 90 100 110 OT75 OT80 OT90 OT100 OT110 OTS75 OTS80 OTS90 OTS100 OTS110 400 450 500 600 OT400 OT450 OT500 OT600 OTS400 OTS450 OTS500 0TS600 PF B * In Canada Recommended Fuse Blocks With Box Connectors For One-Time Class K-5 Fuses 0-60A Fuse Ampere Rating Catalog Number 250V 600V 1 Pole 3 pole 1 pole 3 pole 0-30 31-60 61-100 101-200 201-400 401-600 20306 20606 21036 22001 24001 2631 Dimensions 600V-OTS FUSES 5 0-30 5-1/2 31-60 7-7/8 61-100 9-5/8 101-200 201-400 11-5/8 401-600 13-3/8 60306 60606 61036 62001 64001 6631 60308 60608 61038 62003 64003 6633 A variety of pole configurations and termination provisions is available. Refer to the fuse block section of this catalog for details. 61-600A AMPERE A RATING In. 250V-OT, OTN FUSES 0-30 2 31-60 3 61-100 5-7/8 101-200 7-1/8 201-400 8-5/8 401-600 10-3/8 20308 20608 21038 22003 24003 2633 B C D E mm In. mm In. mm In. mm In. mm 51 76 149 181 219 264 9/16 13/16 1-1/16 1-9/16 2-1/16 2-9/16 14 21 27 40 53 66 1/8 3/16 1/4 1/4 3 5 6 6 3/4 1-1/8 1-5/8 2 19 28 41 51 1 1-3/8 1-7/8 2-1/4 25 35 48 57 127 139 200 244 295 340 13/16 1-1/16 1-5/16 1-13/16 2-9/16 3-1/8 21 27 34 46 66 80 1/8 3/16 1/4 1/4 3 5 6 6 3/4 1-1/8 1-5/8 2 19 28 41 51 1 1-3/8 1-7/8 2-1/4 25 35 48 57 B 31 ONE-TIME GENERAL PURPOSE / CLASS K-5 FUSES Current in Amperes Melting Time - Current Data, 250V Fuses OT30 to 600; OTN 30, 60 Time in Seconds Current in Amperes Melting Time - Current Data, 600V Fuses OTS30 to 600 Time in Seconds Maximum Instantaneous Peak Let-Thru Amperes Peak Let-Thru Current Data - OT, OTN & OTS30 to 600, 250 and 600 Volts AC Available Current in RMS Symmetrical Amperes B 32 OT/OTN/OTS