Siemens MP115DF Dual Function Miniature Circuit Breaker

Yes. Siemens manufactures the MP115DF as a direct, UL listed replacement for legacy Murray MP-T load centers. It is also compatible with Siemens panels that are labeled to accept MP frame breakers.

This breaker combines Combination Type Arc Fault Circuit Interrupter (AFCI) and Class A 5mA Ground Fault Circuit Interrupter (GFCI) protection. It is designed to meet NEC requirements for circuits that require both arc fault and ground fault protection, such as those in kitchens or laundry rooms.

The MP115DF features a pigtail neutral wire. During installation, this coiled white wire must be routed and terminated directly to the neutral bus bar in the load center to power the internal AFCI and GFCI circuitry.

While Siemens manufactures both lines, the MP115DF is specifically UL listed for panels requiring the Murray MP-T frame. The Q115DF is the QP frame equivalent for Siemens panels. You should install the specific frame type listed on your load center's wiring diagram to maintain UL compliance.

The LIG designation indicates the breaker's trip unit includes Long-Time delay for thermal overloads, Instantaneous trip for short circuits, and Ground-Fault sensing. This thermal-magnetic profile is standard for dual function breakers protecting branch circuits.

Yes. This dual function breaker includes an LED trip indicator. If the breaker trips, the LED lights help electricians pinpoint whether the fault was caused by an arc fault, a ground fault, or a standard overcurrent event, simplifying the troubleshooting process.

Yes. The breaker features an automatic self-test and lockout mechanism to ensure the AFCI and GFCI components are functioning correctly. If the internal diagnostics detect a compromised device, the breaker will trip and lock out to prevent resetting without ground fault or arc fault protection.