Siemens B330HHN Three Phase Molded Case Circuit Breaker

Siemens B330HHN three-phase molded‑case circuit breaker (MCCB) protects three‑phase feeders in commercial and light‑industrial electrical panels by providing precise overcurrent protection. This 3‑pole device is rated for 30 A at 240 V AC and uses a thermal‑magnetic trip to coordinate tripping under overloads and short‑circuit events, helping prevent damage to motors, transformers, and downstream equipment. Designed for panelboard installations, the B330HHN is part of Siemens’ HHN family and is specified for a high interrupt rating, with an interrupt capacity of 65 kA at 240 V, allowing safe interruption of substantial fault currents typical in distributed power systems. The molded‑case construction supports reliable long‑term operation in demanding environments, and the unit is commonly used to feed and protect distribution circuits feeding motors, pumps, and HVAC equipment, as well as other three‑phase loads in commercial facilities. For field service, verify compatibility with your Siemens panel and adhere to all applicable electrical codes and enclosure requirements when mounting and wiring this MCCB.