Siemens BQD2100 Miniature Circuit Breaker

Siemens BQD2100 is a two-pole molded‑case circuit breaker (MCCB) engineered for panelboard mounting in commercial and industrial power distribution. Rated for 100 A, it protects feeder and branch circuits up to 480 VAC, with an interrupt rating of 14 kA at 480 VAC, and uses a thermal‑magnetic trip to respond to overload and short‑circuit conditions. This model supports 277/480 VAC and 125/250 VDC ratings, making it suitable for panel installations that handle both AC and DC signals within the same system. As part of Siemens' BQD/CQD family, the BQD2100 is a 2‑pole device designed to fit standard Siemens MCCB accessories and mounting configurations for straightforward field installation in panelboards and switchgear. With its 100 A rating and 14 kA short‑circuit interrupt rating, it provides reliable protection for feeders and branch circuits in moderate to high‑load electrical distributions.