Siemens BLH330N Three Phase Molded Case Circuit Breaker

Siemens BLH330N is a 30 A, 240 V AC, three‑phase molded‑case circuit breaker designed for panelboard protection in commercial and light industrial electrical systems. As a member of the BLH family, it is a 3‑pole, bolt‑on unit that provides common‑trip protection across all poles and uses a thermal‑magnetic trip mechanism for reliable overcurrent protection. The B330H designation is commonly listed with a 22 kA short‑circuit interrupt rating at 240 V, and the device is HACR rated for use with HVAC equipment and other motor loads. Typical applications include motor control panels, distribution panels, and branch protection in three‑phase systems, with panelboard mounting compatible with Siemens BL‑series enclosures and accessories. For installation, it uses a bolt‑on mounting style and a compact molded‑case design that fits Siemens panelboards and aligns with standard BL triple‑pole footprints.