OEM OFM1/400A Molded Case Circuit Breaker Factory, Suppliers

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OEM OFM1/400A Molded Case Circuit Breaker Factory, Suppliers

The OFM1/400A Molded Case Circuit Breaker is a core protection device designed for high-current applications up to 400A. Its classic black housing and prominent red operating handle create a professional visual identity. It integrates reliable thermal-magnetic protection, clear status indication, and a high Ultimate Breaking Capacity (Icu) of up to 50kA. With a high insulation voltage of 690V, excellent breaking performance (Icu 50kA / Ics 35kA), and a design compliant with international standards, it is an ideal choice for achieving reliable overload and short-circuit protection, ensuring power supply continuity and selectivity in industrial main distribution systems, power supply for large equipment, and critical incoming circuits.

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Product Description

Frequently Asked Questions

What is the difference between Molded Case Circuit Breakers (MCCB) and Miniature Circuit Breakers (MCB)?

Molded Case Circuit Breakers (MCCB) are designed for higher current ratings and industrial applications, offering adjustable trip settings and superior fault protection. Miniature Circuit Breakers (MCB) are typically rated for lower currents (up to 125A) suitable for residential and light commercial distribution boards.

How do I choose the correct current rating for a circuit breaker?

Select the current rating (such as 63A, 125A, 250A, 400A, or 630A) based on the maximum continuous current load of the electrical system and the wire current-carrying capacity to ensure effective overload protection without unnecessary tripping.

What safety mechanisms do these circuit breakers provide?

These circuit breakers provide thermal-magnetic or electronic protection against system overloads and high-current short circuits, interrupting the electrical fault instantly to protect downstream equipment and power lines.

Are these circuit breakers suitable for industrial electrical distribution?

Yes, Molded Case Circuit Breakers are specifically designed to handle high breaking capacities, high electrical loads, and heavy operational demands in commercial, industrial, and power distribution systems.

How does ambient temperature affect circuit breaker performance?

High ambient temperatures can lower the thermal trip threshold of a breaker. High-quality circuit breakers incorporate thermal compensation mechanisms to ensure reliable performance across standard operating temperature ranges.