Siemens MPA120AFC AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Quantity
Siemens MPA120AFC - 20A AFCI Miniature Circuit Breaker
New
Quantity
Description
Rated for 120V circuits, this 20A single-pole combination AFCI provides essential residential fire prevention. The Siemens Murray device actively monitors wiring to detect unintended electrical arcs. Designed with a plug-on mounting style, it fits into Murray load centers and is replaced by the QA120AFC in modern panels. Delivering a 10kAIC rating, the thermal-magnetic breaker includes a pigtail neutral wire and a visual LED trip indicator to streamline diagnostics.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MPA120AFC |
| Series | MPA |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | MP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Murray Load Centers |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Special Classification | AFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | LED Trip Indicator |
| Standards | HACR, SWD, UL 1699, UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersCan I use the Siemens MPA120AFC in a legacy Murray load center?
Yes, this breaker is specifically designed for use in Murray load centers that accept MP frame breakers. Siemens manufactures this unit to maintain UL compliance in legacy Murray panels.
What is the direct replacement for the obsolete Murray MP120AFC or MP120AF?
The Siemens MPA120AFC is the direct replacement for the older Murray MP120AFC and MP120AF arc fault breakers.
How is the neutral connection wired on the MPA120AFC?
This breaker features a pigtail neutral connection. The coiled white pigtail wire must be connected directly to the panel neutral bus bar to ensure proper arc fault detection.
What does Combination Arc Fault mean for this breaker?
A combination arc fault circuit interrupter (CAFCI) provides protection against both parallel arcing, such as line-to-neutral or line-to-ground faults, and series arcing along a single conductor. This offers comprehensive residential fire prevention.
Is the MPA120AFC rated for switching duty or HVAC equipment?
Yes, this breaker is both SWD rated for controlling 120V fluorescent lighting circuits and HACR rated for use with heating, air conditioning, and refrigeration equipment.
Does this breaker include a trip indicator?
Yes, the MPA120AFC includes a visual LED trip indicator to help electricians quickly diagnose the cause of a tripped circuit.
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