Murray MPA120AFC 20A 1P 120V Circuit Breaker, AFCI, Plug-On | AmpState

Meet the Murray MPA120AFC—a 20 A, 1-pole, 120-volt AFCI circuit breaker designed to elevate safety and reliability in your electrical distribution. Its plug-on design enables quick, tool-friendly installation, delivering a secure connection to the panel’s bus and minimizing downtime during upgrades or replacements.

Designed for replacement projects and smart stocking, this breaker keeps your BOM aligned with the original part number so you can maintain system compatibility and streamline maintenance. The MPA120AFC is the go-to choice when you need to preserve original schematics while upgrading protection in existing panelboards, load centers, and other distribution setups.

• Amperage / Voltage / Pole: 20 A, 120 V, 1-pole
• AFCI protection: Arc Fault Circuit Interrupter to detect dangerous arcing and trip the circuit before damage occurs
• Plug-On design: Fast, secure installation with minimal disruption
• Application: Ideal for panelboards, load centers, and general electrical distribution installations
• Part number: Murray MPA120AFC; aligns with original BOM for reliable replacements
• Availability: Available from AmpState. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

AFCI protection is particularly important in living spaces and used circuits where arcing faults can start insidiously. By identifying signature arcing patterns—whether in damaged cables, loose connections, or worn insulation—the MPA120AFC helps interrupt power before heat buildup and fire risk escalates. This makes it a prudent choice for residential upgrades, commercial maintenance, and any project where safety and code compliance matter.

Ideal for: electricians who require a dependable, original-part replacement that preserves BOM integrity; facility managers managing aging panels; and DIYers planning safer, code-compliant circuit protection upgrades.

Practical tips for installation and use: verify your panel supports Murray MPA-series plug-on breakers, confirm the 1-pole 120 V configuration, and ensure the circuit you’re protecting aligns with a 20 A branch circuit. If there’s any doubt about compatibility, AmpState is ready to assist with part-number matching and fit confirmation to keep your distribution network running smoothly.