Siemens Q350 is a 3-pole, 50-amp plug-in circuit breaker in the QP low-voltage molded‑case family for 240‑V systems. It provides a 10 kA interrupting capacity (AIC) and uses a thermal/magnetic trip to protect three‑phase circuits. The unit features Plug-In mounting with Insta-Wire terminals for quick wiring and easy replacement, and it employs a common‑trip design that disconnects all three poles simultaneously. This Q350 breaker is used in Siemens load centers and meter/main combos to protect 3‑phase, 240V circuits in residential and light commercial electrical distributions.
