BB3-B3-42-630-511-C is a 3-pole hydraulic-magnetic circuit breaker from the B-Series, designed for precision operation in OEM markets requiring temperature-stable overcurrent protection. This circuit breaker features a handle actuator (one per multipole unit), 50/60Hz Short Hi-Inrush time delay (code 42), and a 30A current rating. It utilizes front panel snap-in mounting style without handleguard and includes push-on 0.250 tab (Q.C.) terminals. The unit carries UL Recognized and CSA Accepted agency approvals. Common applications include power supplies, medical equipment, generators, welders, control panels, and marine/military equipment where reliable circuit protection is essential.