Mitsubishi Electric low-voltage circuit breakers protect and open/close low-voltage circuits (1000 V AC or less, 1500 V DC or less), tripping automatically on overload, short circuit or earth leakage.

Which Mitsubishi circuit breakers are available?

• NF molded case circuit breakers (MCCB): WS-V Series up to 250 A and WS Series 400–1600 A frames, to IEC 60947-2.
• NV earth leakage circuit breakers (ELCB): WS-V Series up to 250 A and WS Series 400–800 A frames, to IEC 60947-2 Annex B.
• NF-MB motor protection breakers: 32–250 A frames, ordered with the MB suffix.

What is the difference between an MCCB and an ELCB?

• An MCCB trips on overload or short circuit.
• An ELCB also detects ground faults and shuts off the current to provide electric shock protection and prevent fires from leakage current.

How do Mitsubishi breakers trip?

• Thermal-magnetic, hydraulic-magnetic and electronic trip types, depending on the model.

What else does Mitsubishi offer for circuit protection?

• Mitsubishi Electric also offers circuit protectors, miniature circuit breakers and air circuit breakers (ACB).

Related products

• Molded Case Circuit Breakers (MCCB) NF
• Earth Leakage Circuit Breakers (ELCB) NV
• NF-MB Motor Protection Breakers
• Circuit Protector CP Series (CP30-BA)

Why choose TKK for Mitsubishi Electric products?

TKK helps factory teams source, select and support Mitsubishi Electric products with confidence, from the first quotation to long after installation.

• Official Mitsubishi Electric distributor, supplying genuine products through an authorized channel.
• Competitive, value-focused pricing for single units and project quantities.
• Extensive stock ready for prompt delivery, so you can keep your lines running.
• A team of product specialists ready to advise on model selection, application and replacement.
• Dedicated, responsive after-sales service and technical support.

Contact TKK for model selection or a quotation for your machine.