UL 248-15:2000 pdf download Low-Voltage Fuses – Part 1 5: Class T Fuses
General
NOTE –
This Part is intended to be read together with the Standard for Low-Volage Fuses – Part 1: General Requirements, hereafterreferred to as Part 1. The numbering of the Clauses in this Part corresponds to like numbered Clauses in Part 1. The requirementsof Part 1 apply unless modifed by this Part. For Clauses not shown below, refer to the Standard for Low-Voltage Fuses – Part 1:General Requirements,NMXJ-009/248/15-2000-ANCE+ CSA C22.2 No.248.1 UL 2481
1.1 Scope
This Part applies to Class T fuses rated 1200 A or less and 300 V ac, 800 A or less and 600 V ac. DCratings are optional.
4 Classification
Class T fuses are non-renewable and current limiting with an interrupting rating of 200,000 A. 300 V acClass T fuses are divided into eight body sizes. 600 V ac Class T fuses are divided into seven body sizesThe maximum current rating ln for each size is specified in this Part. Time-delay ratings are optional.
5 Characteristics
5.2 Voltage rating
For AC, the rating shall be 300 V ac or 600 V ac in accordance with dimensions shown in Figures A andB
The DC voltage rating may be different from the AC rating.
5.3 Current rating
Refer to Figure A for range of current ratings in each body size for each voltage rating.
5.5 Interrupting rating
For AC -200.000 A
For DC, the preferred ratings are 10,000, 20,000, 50,000, 100,000, 150,000, or 200,000 A
5.6 Peak let through current and clearing I 2 t characteristics
Maximum values of peak let-through current and clearing I 2 t for 300 V ac fuses are given in Table A and for 600 V ac fuses are given in Table B.

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