Fuse Characteristics: IEC_gM
Fuse time-current characteristics, voltage ratings, interrupting capacity, and current-limiting classification by fuse class. Covers UL 248 classes (J, RK1, RK5, CC, T, L, G, H, K) and IEC 60269 types (gG, gM, aR, aM). Includes melting and clearing I2t let-through energy ranges, peak let-through current, conventional fusing/non-fusing current factors, rejection feature type, and application guidance.
| fuse class | record id | amp rating max (A) | amp rating min (A) | application | conventional fusing current factor (dimensionless) | conventional nonfusing current factor (dimensionless) | current limiting | dimensions ferrule blade | fuse type | interrupting rating kA ac (kA) | notes | rejection feature | time delay | ul standard | voltage rating V (V) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| IEC_gM | gm_500v | 160 | 6 | IEC gM 500VAC 6-160A; motor duty dual marking (e.g. gM 63M80: 63A motor start limit 80A cable protection); single element with two distinct operating zones; used to protect both motor windings and supply cable | 2 | 1.35 | current_limiting | knife_blade_NH | gM | 120 | gM fuse dual rating: first number is rated current (cable protection) second number (higher) is motor protection threshold; breaks short circuits up to 120kA; IEC 60269-4 covers motor circuit applications; aM often preferred for simplicity | none | dual_purpose | IEC_60269-2 | 500 |
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