BA2-B0-34-450-121-D is a two-pole hydraulic magnetic circuit breaker designed for DC medium-delay applications with front panel snap-in mounting. The breaker features a handle actuator (one per multipole unit) and utilizes the hydraulic magnetic principle to provide precise operation across extreme temperature environments. It is mounted using a 0.75-inch (19.05 mm) wide bezel without handleguard and includes a 250 TAB (O.C.) type terminal configuration. The device is UL Recognized under Standard 1077 and CSA Accepted, meeting stringent safety requirements for power supplies, medical equipment, office equipment, control panels, and marine equipment applications.