Tronic Industrial 4-Pole Circuit Breaker – 250A, 21kA MCCB
TSh 256,500
Our review
This is a moulded case circuit breaker from Tronic, built around a four-pole, 250A frame and rated to interrupt fault currents up to 21kA at 400/415V. That combination points to three-phase work: factory distribution boards, commercial building panels, and utility-side installations where a single breaker has to isolate all live conductors together. It suits electricians and maintenance teams specifying protection for a feeder or main incomer rather than anyone working on small single-phase circuits.
Before ordering, confirm your system voltage, the actual load current, and the prospective short-circuit current at the point of installation. The 21kA rating must meet or exceed that fault level, and the trip unit characteristics need to coordinate with upstream and downstream devices so a fault trips only the nearest breaker. Also check the pole configuration matches your wiring and that the mounting and terminal arrangement fits your enclosure.
Compared with other MCCBs in this class, the deciding factors are usually breaking capacity, trip curve options, and whether accessories such as auxiliary contacts or shunt trips are available. This one is available on Sokonia; verify the details against your single-line diagram before committing.
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