Fuse Characteristics: CLASS J
j lt 0500A to j lt 0600A
Fuse time-current characteristics, voltage ratings, interrupting capacity, and current-limiting classification by fuse class (UL 248 and IEC 60269). Also includes per-rating let-through current (peak A) and I²t (A²s) data from IEEE Std 3004.3-2020 for arc-flash and short-circuit coordination studies, covering Classes RK1, RK5, J, T (300V/600V), L, CC, G, CF, CD, C, CA, CB, mine-duty, and semiconductor fuse voltage derating.
| fuse class | record id | amp rating label | amp rating max (A) | amp rating min (A) | i2t 100kA A2s (A2s) | i2t 200kA A2s (A2s) | i2t 300kA A2s (A2s) | i2t 50kA A2s (A2s) | peak lt 100kA A (A) | peak lt 200kA A (A) | peak lt 300kA A (A) | peak lt 50kA A (A) | peak lt function | standard | voltage rating V (V) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CLASS J | j lt 0500A | 500A | 500 | 500 | 2,000,000 | — | — | — | 42,000 | — | — | — | — | IEEE Std 3004.3-2020 | 600 |
| CLASS J | j lt 0600A | 600A | 600 | 600 | 2,500,000 | 2,500,000 | 3,000,000 | 2,500,000 | 45,000 | 70,000 | 101,367 | 35,000 | Y = 3E-07x2 + 0.15x + 26667 | IEEE Std 3004.3-2020 | 600 |
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