Specifications: 150 Amps, 3 Pole, Bolt-On, Thermal Magnetic Approval ULMfg Status: Obsolete, Residential/Commercial FJ3B150 3 Pole 600V F-frame, ET-F. Originally made by I-T-E Electric. These are available only in recondition/green condition. Breakers were made as low as 70A, FJ3B070 thru 225A. Very popular replacement breaker still in demand. The new replacements are not physically interchangeable. Shunt trips and other accessories is field installable, but are tricky to install. Only techs with prior ITE experience should install these accessories.