Plug-In Circuit Breakers

Shop plug-in circuit breakers for residential, commercial, and light-industrial panelboards, including standard, tandem, quad, AFCI, GFCI, and equipment-protection configurations.

Plug-in breakers are panel-specific. Confirm the manufacturer, panel series, exact catalog number, poles, amperage, voltage, interrupting rating, terminal arrangement, and panel label before choosing a replacement.

Send label photos to sales@ampstate.com for technical matching. View all circuit breakers.

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Square D QO340EPD - 40 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO340EPD - 40 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
The Square D QO340EPD is a 40A, 240V, 3-pole plug-in molded case circuit breaker designed...
Square D QO3401021 - 40 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO3401021 - 40 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
Meet the Square D QO3401021 — a 40A, 240V, 3-pole plug-in circuit breaker from the...
Square D QO340 - 40 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO340 - 40 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
Meet dependable, site-ready protection for your electrical backbone with the Square D QO340 — a...
Square D QO335 - 35 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO335 - 35 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
The Square D QO335 is a purpose-built 35A, 240V, 3-pole plug-in molded case circuit breaker...
Square D QO330GFI - 30 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO330GFI - 30 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
Meet the Square D QO330GFI — a 30A, 240V, 3-pole plug-in molded case circuit breaker...
Square D QO330EPD - 30 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO330EPD - 30 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
Meet the Square D QO330EPD 30A, 240V, 3-Pole Plug-In Circuit Breaker—a purpose-built protective device designed...
Square D QO330 - 30 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO330 - 30 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
Square D QO330 is a 30A, 240V, 3-pole plug-in molded case circuit breaker built to...
Square D QO325 - 25 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO325 - 25 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
The Square D QO325 is a 25 A, 240 V, 3-pole plug-in molded case circuit...
Square D QO320GFI - 20 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO320GFI - 20 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
Introducing the Square D QO320GFI — a rugged 20A, 240V, 3-pole plug-in molded case circuit...
Square D QO320EPD - 20 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO320EPD - 20 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
Meet the Square D QO320EPD — a purpose-built, 20A, 240V, 3-pole plug-in molded-case circuit breaker...
Square D QO320 - 20 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO320 - 20 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
Square D QO320 is a 20-amp, 240-volt, 3-pole plug-in molded case circuit breaker designed to...
Square D QO315GFI - 15 A 240 V 3-Pole Plug-In Circuit Breaker | AmpState - Circuit Breakers

Square D QO315GFI - 15 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
The Square D QO315GFI is a 15 A, 240 V, 3-pole plug-in molded case circuit...
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