Ningbo Doto Electric Co., Ltd.
Ningbo Doto Electric Co., Ltd.
The Doto MCCB 3P molded case circuit breaker applies the JLM1 (M1) platform to three-phase feeders and motor protection duty. Across frames JLM1-63 to JLM1-1250 it offers 6-1250A rated currents, AC400/690V working voltage and breaking classes from 25kA (63L) up to 100kA (large frames, H class), with service breaking capacity Ics of 18-50kA. Time/current characteristic curves for power distribution and motor protection are published per frame, and front or rear connections plus 3/4-pole versions simplify panel integration to IEC60947-2.
| Series frames | JLM1-63, JLM1-100, JLM1-225, JLM1-400, JLM1-630, JLM1-800, JLM1-1250 |
|---|---|
| Pole | 3P (2P/4P available in series) |
| Rated current | 6-63A (63 frame), 10-100A (100), 100-225A (225), 200-400A (400), 400-630A (630), 630-800A (800), 800-1250A (1250) |
| Rated working voltage Ue | AC400/690V |
| Rated insulation voltage Ui | 690V (63 frame), 800V (100-1250) |
| Rated impulse withstand Uimp | 6000V (63), 8000V (100-1250) |
| Breaking capacity class | L / M / H(C) |
| Ultimate breaking Icu at 400V | 25-100 kA by frame and class |
| Service breaking Ics | 18-50 kA |
| Flashover distance | 50 mm (63-630), 100 mm (800/1250) |
| Outline size L | 135-406 mm by frame |
| Conformed standards | IEC60947-2, GB14048.2 |
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Professional manufacturer of AC contactors, circuit breakers, capacitors, hour meters and counters. Factory-direct, CE & ROHS certified, exporting worldwide.
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