Federal Pacific NJ631150 150A 3-Pole 600VAC Circuit Breaker

The Federal Pacific NJ631150 is a robust, molded case circuit breaker designed for industrial and commercial electrical distribution systems. This 3-pole breaker provides reliable overcurrent protection with a continuous current rating of 150 amperes at 600 VAC, making it suitable for applications such as motor control centers, panelboards, and switchgear in manufacturing facilities, power plants, and large buildings. Key features include magnetic trip functionality with adjustable settings from 800-7500A for short-circuit protection, thermal-magnetic trip mechanism for overload and fault detection, and a compact design for easy installation in NJ-frame systems. Advantages over similar products include its proven durability in high-demand environments and compatibility with legacy FPE systems, though it may require more maintenance compared to modern breakers due to the manufacturer's historical reliability issues. Drawbacks include limited availability of parts since Federal Pacific ceased operations, and potential safety concerns from past recalls on related models—users should verify compliance with current standards. This unit appears used but tested and cleaned, with visible wear on the casing but intact terminals and labeling. Ideal for retrofitting older systems where exact replacements are needed.