Circuit Breakers

New, Replacement, Recertified & Obsolete Circuit Breakers — In Stock and Ready to Ship

Key Takeaways:

• Essential Electric Supply provides new, replacement, recertified, surplus, and obsolete circuit breakers with same-day shipping across North America. 

• Circuit breakers protect electrical systems by interrupting power during overloads or short circuits. 

• Inventory includes all major electrical breaker types such as MCCB, ICCB, ACB, MCB, GFCI, and AFCI for residential, commercial, and industrial use. 

• Recertified breakers are tested to OEM specifications and come with a two-year warranty and 30-day return policy. 

• Customers can source hard-to-find and discontinued models quickly, with expert support available 24/7.

Essential Electric Supply is your go-to power distribution supplier for in-stock, hard-to-find circuit breakers, delivering new, recertified, surplus, and obsolete units with same-day shipping across North America. When equipment failure or project delays are on the line, we help source the exact breaker electricians and contractors need immediately — even discontinued models most circuit breaker suppliers can’t get.

Circuit breakers protect electrical infrastructure by automatically disconnecting power when faults such as overloads or short circuits occur. We carry all major types, including molded case (MCCB), insulated case (ICCB), air circuit breakers (ACB), miniature circuit breakers (MCB), GFCI, and AFCI — covering residential panels, commercial buildings, and industrial power distribution.

Shop Our Circuit Breakers

We stock new, recertified, surplus, and obsolete circuit breakers in one place — so you have access to reliable parts across the full depth of our 60,000+ product inventory, whether you need a current production unit or a discontinued model that's been off the market for years. 

Our inventory spans all configurations, including 1 pole, 2 pole, 3 pole, GFCI, and AFCI breakers from leading brands including Siemens, Eaton, Square D, Schneider Electric, Cutler-Hammer, GE, ABB, and obsolete lines. 

Same-day shipping is available on in-stock orders placed by 1:30 PM PST, with 24-hour emergency support and a two-year warranty on all recertified stock.

Every recertified electrical breaker is tested to OEM specifications before it ships — no exceptions. If the exact part you need has been discontinued, our team can identify authorized replacements and retrofits compatible with your existing system. 

If you need help identifying the right breaker fast, our team is available 24 hours a day. For urgent orders or large-volume requests, call our 24-hour support line or submit a quote request.

Every order is backed by:

• Same-day shipping on in-stock orders placed before 1:30 PM PST

• 24-hour emergency support line for urgent needs

• 75 years of combined industry experience across our team

• Two-year warranty on most products

• 30-day return policy

• Multiple shipping points across North America

Choosing the Right Circuit Breaker

The right electrical circuit breaker depends on three things: your application voltage, the required amperage, and the installation environment. Use this as a starting point.

Molded Case Circuit Breakers (MCCBs)

MCCBs are the standard choice for commercial and industrial branch electrical circuit protection. They handle currents from 10 to 2500A and are commonly installed in panelboards, switchboards, and motor control centers. Shop MCCBs →

Insulated Case Circuit Breakers (ICCBs)

ICCBs are built for higher amperage loads than MCCBs — typically 800 to 5000A — making them the right fit for main switchboards, data centers, and heavy-duty distribution systems where enhanced arc flash protection is required. Shop ICCBs →

Air Circuit Breakers (ACBs)

ACBs are used in main distribution boards for commercial and industrial applications. They are the best choice when regular repair, maintenance, or operations access is required, as their open construction allows for in-service inspection and servicing without full replacement. Shop ACBs →

Miniature Circuit Breakers (MCBs)

MCBs are designed for residential panels and light commercial installations, typically handling currents up to 125A. They offer reliable overload and short circuit protection in space-constrained applications where a compact form factor is needed. Shop MCBs →

Frequently Asked Questions

Do you carry obsolete and discontinued circuit breaker brands?

Yes. Our inventory includes obsolete and discontinued replacement circuit breakers from brands that most distributors no longer stock, including discontinued lines from Siemens, Eaton, Square D, Cutler-Hammer, GE, ABB, and others. If you're working on an aging system and can't find the part through standard channels, contact our team with your part number, and we'll track it down.

Are your recertified circuit breakers tested before shipping?

Yes. Every recertified circuit breaker is tested to OEM specifications before it leaves our warehouse. Recertified units ship with our two-year warranty — the same coverage applied to new stock — and all orders are backed by our 30-day return policy. We stand behind the quality of every part we ship.

Do you offer same-day shipping on circuit breakers?

Yes. Orders placed by 1:30 PM PST on in-stock circuit breakers ship the same day via UPS. Free UPS Ground shipping is available on orders over $250 within the continental United States. Expedited after-hours air delivery is available for time-critical situations, and multiple shipping points across North America mean most customers receive their parts quickly.

How do I get help identifying the right breaker?

Call our 24-hour support line or submit a quote request online. To move quickly, have your part number or catalog number ready, and if the breaker is already installed, photos of the label from multiple angles will help our team confirm the amperage, voltage rating, pole configuration, and frame type. If the exact part is no longer available, we can identify compatible replacements or retrofits for your existing panel.