Ningbo Doto Electric Co., Ltd.
Ningbo Doto Electric Co., Ltd.
The Doto MCCB molded case circuit breaker is a compact 2P breaker built on the JLM1 (M1) frame platform covering JLM1-63 to JLM1-1250 frames. It provides thermal-magnetic overcurrent and short-circuit protection with L/M/H breaking-capacity classes, achieving 25-100kA ultimate breaking (Icu) at 400V depending on frame and class. The red ON/OFF handle with trip indication, adjustable ratings and accessory compatibility (shunt trip, auxiliary contact) make it suitable for main incomer and feeder duty in industrial distribution, compliant with IEC60947-2 / GB14048.2.
| Series frames | JLM1-63, JLM1-100, JLM1-225, JLM1-400, JLM1-630, JLM1-800, JLM1-1250 |
|---|---|
| Pole | 2P (3P/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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