Siemens Q290 2 Pole Plug-On Main Circuit Breaker

Siemens Q290 is a 2-pole, 90-amp circuit breaker in the Type QP family, engineered for 120/240V AC service and designed to be used in Siemens residential and light commercial distribution systems to protect feeders and main circuits within compatible load centers. This plug-in, common-trip breaker carries a 10,000-amp interrupt rating (10 kAIC) at 240V, ensuring both poles trip simultaneously under fault conditions, which minimizes the risk of parallel fault currents and protects wiring and devices from overcurrent damage. Its compact footprint measures 3 inches long by 3 inches wide by 2 inches high, and it employs plug-in mounting that simplifies installation and replacement in standard Siemens QP/Molded Case panels, aligning with common panel accessories and bus configurations. Typical applications include main protection for a residential service or feeders within a Siemens distribution scheme, where a 90A rating and 120/240V operation meet code requirements and provide reliable safeguard against overloads in multi-circuit residential or light-commercial installations.