Siemens Q270 Circuit Breaker

Siemens Q270 is a two-pole, 70A plug-in circuit breaker from the QP/MP family, designed for 120/240 VAC service in Siemens load centers and panels to protect feeders and branch circuits. It delivers thermal-magnetic overcurrent protection with a typical 10 kAIC interrupt rating at 240V, ensuring rapid disconnection under short-circuit conditions; the device is rated for two hot legs and provides common-trip operation so both poles trip together. As a 2-pole device, it occupies two spaces in compatible Siemens QP/MP panels, making it a straightforward upgrade or replacement for 70A circuits in residential or light commercial installations. Variants exist, including Q270H and Q270HH, which offer higher interrupt ratings (22 kAIC) for panels and setups that demand greater fault-current handling; when selecting a replacement, verify the exact model, panel compatibility, and required interrupt rating to ensure proper fit and protection.