CMH3-63 series small circuit breakers have functions such as short circuit protection, overload protection, control and isolation. The series circuit breakers are suitable for the protection of low-voltage terminal distribution lines in the fields of industry, civil construction, energy, communication and infrastructure with AC frequency 50Hz/60Hz, rated working voltage C240/400V and rated working current up to 63A. Product standard: GB/T10963.1,IEC 60898-1. CMH3-63 series circuit breakers are characterised by small size, simple structure and high reliability. The circuit breaker has a wealth of functional accessories, including auxiliary contacts, alarm contacts, sub-excitation derailleurs, undervoltage derailleurs, overvoltage derailleurs, over-undervoltage derailleurs and other accessories. The width of these accessories is 9mm for the auxiliary contact and alarm contact, and 18mm for all other accessories.

Main technical parameters

● Rated shell frame current：63A

●Single pole width：18mm

●Product standard：GB/T10963.1IEC60898-1

●Rated short-circuit breaking capacity：6kA

●Rated insulation voltage Ui：500V

●Dielectric strength test voltage (1min): 2kV

●Rated impulse withstand voltage Uimp：4kV

●Reference temperature: 30°C

●Rated current (A): 1, 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63

●Mechanical life: 20,000 cycles

●Rated voltage: 240/400V (1P, 2P), 400V (2P, 3P, 4P)

●Electrical life: 4,000 cycles

●Rated frequency (Hz): 50/60- Protection class: IP20

●Disconnection curve: B (3-5In), C (5-10ln), D (10-20ln)

●Wiring capacity (mm2): 25

●Number of poles: 1P, 2P, 3P, 3P, 4P

●Wiring method: either top or bottom wiring

Form and mounting dimensions