Shihlin Electric NF400-CN Molded Case Circuit Breaker

The Shihlin Electric NF400-CN Molded Case Circuit Breaker delivers 400 A of continuous-duty protection for low-voltage industrial power distribution at up to 690 VAC. As part of the NF400 frame, this three-pole panel-mount MCCB uses a thermal-magnetic trip to guard feeders, large motors, transformers, and industrial equipment against overloads and short circuits. Rated operational voltage is 690 VAC maximum with a 50/60 Hz frequency, and the unit features a 400AF frame and lug terminals for secure connections (approximate weight 5.6 kg / 12.3 lb for NF400 frame units). The device is designed for installation in switchboards, motor control centers, and control panels within industrial and commercial power distribution environments. Applications include feeder circuits and equipment protection in manufacturing plants, process industries, pumping stations, and other facilities requiring reliable three-phase protection. Key specifications include continuous-duty operation, IEC 60947-2 compliance, and CN-series breaking capacity. Common replacements include BM400-CN, Mitsubishi NF400-SW, and Schneider Electric NSX400, making it a compatible upgrade or replacement component in industrial settings.