Mitsubishi Electric NF molded case circuit breakers (MCCB) protect low-voltage circuits and trip automatically on overload or short circuit. The range runs from 32 A to 1600 A frames to IEC 60947-2.

What is a Mitsubishi NF MCCB?

• A molded case circuit breaker for protection and open/close of low-voltage circuits.
• Trips automatically when an overload or short circuit occurs.
• Conforms to IEC 60947-2.
• NF is the Mitsubishi model code for MCCBs.

Which NF types are available?

• NF-C types
• NF-S types, including -SE, -SG and -SD versions
• NF-H/L types
• NF-R/U types, including ultra current-limiting NF-U models
• AC/DC compatible WS-V MCCB types
• Breaking capacity differs by model and voltage.

Which WS-V models cover frames up to 250 A?

• NF-C: NF63-CV, NF125-CV, NF250-CV
• NF-S: NF32-SV, NF63-SV, NF125-SV, NF125-SEV, NF125-SGV, NF160-SGV, NF250-SV, NF250-SEV, NF250-SGV
• NF-H/L: NF63-HV, NF125-HV, NF125-HEV, NF125-HGV, NF125-LGV, NF160-HGV, NF160-LGV, NF250-HV, NF250-HEV, NF250-HGV, NF250-LGV
• NF-R/U: NF125-RGV, NF250-RGV, NF125-UV, NF250-UV

Which WS models cover 400 A to 1600 A frames?

• NF-C: NF400-CW, NF630-CW, NF800-CEW
• NF-S: NF400-SW, NF400-SEW, NF630-SW, NF630-SEW, NF800-SEW, NF800-SDW, NF1000-SEW, NF1250-SEW, NF1250-SDW, NF1600-SEW, NF1600-SDW
• NF-H: NF400-HEW, NF630-HEW, NF800-HEW
• NF-R/U: NF400-REW, NF630-REW, NF800-REW, NF400-UEW, NF800-UEW

How do I choose the right MCCB?

• Select the frame size from the circuit's rated current.
• Select the type (C, S, H/L, R/U) from the short-circuit current at the installation point; breaking capacity differs by model and voltage.
• For earth leakage protection, choose an NV ELCB; for motor circuits, choose an NF-MB motor protection breaker.

Related products

• Mitsubishi Circuit Breakers
• Earth Leakage Circuit Breakers (ELCB) NV
• NF-MB Motor Protection Breakers

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