Siemens BQD130 Miniature Circuit Breaker

Siemens BQD130 is a 1-pole molded‑case circuit breaker (MCCB) rated for 30 A at 277 V AC, with an interrupting capacity of 14 kA, suitable for taking out faults in commercial power distribution. It belongs to the BQD/CQD family and features a 1-inch wide, panelboard‑mount form with a low‑tab terminal design engineered for reliable installation in compatible Siemens panels. The device uses a thermal‑magnetic trip unit to protect a single live conductor from overload and short circuits, providing precise coordination with other protective devices in the same panel. It is UL 489, CSA‑C22.2, and IEC 947‑2f listed, and rated for operation up to 40°C ambient, making it appropriate for typical indoor environments. The BQD130 protects branch circuits in 120/277 V systems, including lighting, receptacle outlets, and small equipment circuits in offices, retail, and light industrial settings. Catalog number BQD130 identifies this 30 A, 1P unit; for multi‑pole configurations or higher ratings, Siemens offers the broader BQD/CQD line, designed to maintain consistent trip characteristics across compatible devices.