Siemens AG QR23B200 Molded Case Circuit Breaker

Siemens QR23B200 is a three‑pole molded‑case circuit breaker built on the QR frame for reliable low‑voltage protection in power distribution systems. This 200 A unit is designed for 240 V AC circuits and uses a thermal‑magnetic trip mechanism to guard conductors and equipment from overloads and short circuits. As part of the QR family, QR23B200 is suited for general‑purpose protection in commercial and light‑industrial panelboards, service entrances, and distribution panels, delivering dependable disconnection when faults occur across three conductors. The three‑pole configuration ensures coordinated protection of all phases in a single device, while the molded‑case design provides robust durability in demanding environments. The QR23B200 model identifies a Siemens low‑voltage MCCB with the QR frame and a thermal‑magnetic trip system, aligning with Siemens’ standardized protection platform across compatible QR‑series equipment. For installers, verifying that the breaker matches the panel’s voltage rating and layout ensures proper fit and electrical compatibility within existing Siemens QR‑series configurations.