Siemens QP315 Three-Phase Molded Case Circuit Breaker

Siemens QP315 is a three‑pole, 15‑amp molded‑case circuit breaker in the QP family, designed for 240 V three‑phase distribution and intended for plug‑in mounting in Siemens panelboards. It uses a thermal‑magnetic trip for overload and short‑circuit protection with a common‑trip across all poles and a 10 kA interrupt rating at 240 V. The unit measures about 12.8 inches in length, 4 inches in width, and 3.4 inches in height, reflecting a compact plug‑in form factor for distribution panels. Ideal for protecting feeders and branch circuits in commercial or light industrial 3‑phase installations, it’s commonly used in control panels, motor feeders, and other 240 V applications requiring reliable, coordinated protection of all three phases.