FULLWILL ELECTRIC CO., LTD established in 2005, is a professional manufacturer and exporter of Miniature Circuit Breaker (MCB), we specialized in the R&D, production and sales.
USFULL DZ47-63 series MCB is used in lighting distribution system or motor distribution system for protecting overload and short-circuit. USFULL MCB is novel in structure, light in weight, reliable and excellent in performance. It has high breaking capacity, can trip quickly. It’s case and body are adopted with high re-resistant and shockproof plastics.
Miniature circuit breakers (MCBs) ensure electrical safety in homes, offices and other buildings as well as for industrial applications by protecting electrical installations against overloads and short circuits. Once a fault is detected, the miniature circuit breaker automatically switches off the electrical circuit to prevent damage to wires and to avoid the risk of fire. Warranting reliability and safety for people and assets, MCBs are equipped with two tripping mechanisms: the delayed thermal tripping mechanism for overload protection and the magnetic tripping mechanism for short circuit protection. USFULL strictly control in all spare parts, with 6S Standard Workshop to make the Miniature Circuit Breaker qualified and higher performance. Our MCB conform to GB10963 and IEC60898.
USFULL MCB with big range in rated current。
DZ47-63: 1A, 2A, 3A, 4A, 5A, 6A, 10A,16A, 20A, 25A, 32A, 40A, 50A, 63A
DZ47-125: 80A, 100A, 125A
For overload protection the temperature of a bimetal, through which the current passes, is decisive. If the nominal current—the current the circuit breaker is designed for—rises slightly, the bimetal heats up to a greater extent and, after a certain period of time, this causes the switching mechanism to trip.
Short-circuit protection is located in the electromagnetic coil. In the event of a short-circuit, the current rises very sharply and the coil creates a magnetic field that both trips the switching mechanism and opens the contacts via a quick release mechanism. The additional quick release for opening the contacts in the event of a short-circuit helps to keep the energy of the short-circuit to a minimum, which in turn keeps the ‘stress’ the wires are subjected to, as low as possible.
We can customize different handle color for different customers.
USFULL Miniature Circuit Breaker with long life, is mainly used in AC 50Hz/60Hz single pole 230V or two pole, three pole, fore pole 400V circuit for overload and short-circuit protection. As well as for un-frequent on/off switching electric equipment as lighting circuit in normal case.