China OFM1/63A Molded Case Circuit Breaker Factory, Suppliers

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China OFM1/63A Molded Case Circuit Breaker Factory, Suppliers

The OFM1/63A Molded Case Circuit Breaker (MCCB) is a compact and reliable circuit protection device. Its black housing, red operating handle, and prominent red warning marker create a sharp visual contrast. It integrates precise overload and short-circuit protection, clear status indication, and performance that meets international standards. Suitable for AC 400V distribution circuits with rated currents up to 63A, it provides cost-effective overcurrent and short-circuit protection for distribution boards, control panels, and terminal loads.

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Product Description

Frequently Asked Questions

Q What is the difference between a Miniature Circuit Breaker (MCB) and a Molded Case Circuit Breaker (MCCB)?

MCBs (like the 63A model) are primarily used for low-current commercial and residential applications, while MCCBs (ranging from 125A up to 630A) are designed for heavy-duty industrial environments demanding higher current loads and adjustable trip settings.

Q How do I choose the correct current rating (e.g., 125A, 250A, 400A, 630A)?

Selection depends on the total continuous load of your circuit and cable capacity. The circuit breaker rating should match or slightly exceed the full load current of the system while protecting the downstream wiring from overload damage.

Q What primary protection features do these circuit breakers offer?

These breakers provide dual protection mechanisms: thermal protection against prolonged electrical overloads and magnetic protection against immediate short-circuit faults.

Q Are these circuit breakers suitable for commercial and industrial installations?

Yes, the OFM1 series of Molded Case and Miniature Circuit Breakers are manufactured to international safety standards, making them suitable for distribution boards, industrial control panels, and commercial infrastructure.

Q What maintenance is required for Molded Case Circuit Breakers?

Regular maintenance includes visual inspection for signs of overheating, checking terminal connection tightness, cleaning dust build-up, and periodically testing the mechanical trip function via the test button.