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JBTM1L MCCB Moulded Case Circuit Breaker (residual current operated)


JBTM1L series with residual current protection plastic shell circuit breaker (hereinafter referred to as circuit breaker) is one of the new leakage circuit breakers designed and developed by the company using international advanced technology. Suitable for AC 50Hz. In circuits with a rated voltage of 400V and a rated current of 16A to 800A, it can be used to protect the circuit from overload, short circuit, etc., and can also be used as an infrequent conversion of the line and infrequent start of the motor.



Its main function is to provide indirect contact protection for fatal personal electric shocks. The residual current circuit breaker whose rated residual operating current does not exceed 30mA can also be used as supplementary protection for direct contact when other protection measures fail, but it cannot be used as the only direct contact protection. It can also be used to prevent fire hazards caused by contact with fault currents.

Applicable environment

· The altitude shall not exceed 2000m;

· The ambient temperature is not higher than + 40 °C (for marine products, + 45 °C) and not lower than - 5 °C;

· The relative humidity of the environment shall not exceed 50% when the maximum temperature is + 40 °C. At a lower temperature, it can have a higher relative humidity;

· The maximum inclination shall not exceed + 5°;

· It can work reliably under normal vibration of the ship;

· Reliable operation under earthquake (4G);

· In the medium without explosion hazard, where the medium is enough to corrode metal and destroy insulating gas and conductive dust;

· Where there is no rain or fog;

· Pollution level: Level 3;

· Installation category: the installation category of the main circuit is power;

· The external magnetic field near the circuit breaker installation site shall not exceed 5 times of the geomagnetic field in any direction


Applicable Standard




Model Explanation

Product Categories

Based on the number of poles of the product: two poles (125A), three poles, four poles;

Based on rated current:

JBTM1L-125: 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, 125A;

JBTM1L-250: 100A, 125A, 140A, 160A, 180A, 200A, 225A, 250A;

JBTM1L-400: 225A, 250A, 315A, 350A, 400A;

JBTM1L-800: 630A, 700A, 800A;