Siemens Q115 Miniature Circuit Breaker

Yes. Siemens QP circuit breakers, including the Q115, are the official direct replacements for discontinued Murray MP-T breakers. They are authorized and UL listed for use in Murray load centers that previously accepted MP115 branch breakers.

The Siemens Q115 is the exact, manufacturer-approved replacement for the obsolete 15-amp, 1-pole Murray MP115 circuit breaker. Siemens transitioned the legacy Murray breaker brand directly into the Siemens QP line.

Yes, the Q115 is SWD rated, meaning it is certified for switching 120V fluorescent lighting circuits. It is also HACR rated for safe use with heating, air conditioning, and refrigeration equipment branch circuits.

The Q115 is a Type QP branch breaker. It is designed to plug into standard Siemens panels that accept 1-inch full-size breakers, including modern PL, ES, and legacy EQ series load centers.

The terminal lug on the Q115 requires a tightening torque of 25 in-lbs. You should always confirm the torque rating printed directly on the breaker label or panel wiring diagram before finalizing the installation.

The Q115 is a standard full-size single-pole breaker that occupies exactly one 1-inch space on the panel busbar.

Yes, this breaker utilizes the Siemens Insta-Wire design. The terminal screws are shipped backed out from the factory, which allows you to insert the branch circuit wire immediately and saves time during panel wiring.

No, the Q115 is a standard thermal-magnetic breaker designed strictly for overload and short-circuit protection. If your local electrical code requires Arc Fault or Ground Fault protection for the branch circuit, you must use a specialized breaker like the QA115AFC instead.