Features: 1) Hydraulic magnetic MCB is mainly used to protect circuit against overload and short-circuit. 2) Adopting hydraulic magnetic trip instead of bimetal, it has a high sensitivity, and will not be affected by the ambient temperature. 3) They are mainly used for illumination and distribution in industry or domestic to protect circuit against overload and short-circuit. 4) Under the circuit of 50/60 Hz AC, 240V for one, two-pole; 415V for three-pole, they are complying with IEC 157-1973, and BS3871.