High-safety miniature residual-current circuit breaker

The utility model belongs to the field of residual-current circuit breakers, and particularly relates to a high-safety miniature residual-current circuit breaker, which comprises a body, a convex shell fixedly connected to the front surface of the body, a switch rotatably connected to the front surface of the convex shell, a heat dissipation mechanism arranged at the top of the body, the switch comprises a cavity, the cavity is arranged in the convex shell, and a through hole is arranged on one side of the cavity. According to the device, through the magnetic effect among an electromagnet, a magnetic block, a magnetic ball and a sleeve rod, monitoring can be more sensitive when a circuit is abnormal, so that the protection effect on the circuit is better, a sealing plug is jacked up by a jacking rod, and the sealing plug is prevented from being damaged. And when the temperature in the body is reduced, the ejector rod moves downwards, so that the heat dissipation holes are blocked by the sealing plugs, and the