Specifications: 600 Amps, 3 Pole, Bolt-On, Thermal Magnetic Approval ULMfg Status: Obsolete Industrial Breaker HK3B0600 3 Pole 600 Volt, 600 Amp Thermal magnetic molded case circuit breaker. Manufactured originally by ITE then Gould and now Siemens. Shunts and auxiliary switches are field installable, but are very difficult to install unless you have experience with this ET class breaker. Consult a qualified technician. Thoroughly rebuilt and tested. 600 VAC at 50/60 HZ, 600 ampere, 3 pole, interrupting rating 65 kiloampere at 240 VAC, 35 kiloampere at 480 VAC, 25 kiloampere at 600 VAC UL, terminal not included, size 7.5 inch w x 5.44 inch d x 11 inch h, brand, ET trip type lI, Fits older ITE panel boards FC-1. Sold as Green/Refurbish.