Insulated Case Circuit Breakers (ICCBs)

New, Recertified & Obsolete ICCBs — In Stock and Ready to Ship

Key Takeaways

• Essential Electric Supply offers new, recertified, surplus, and obsolete ICCBs with same-day shipping for high-capacity applications. 

• ICCBs are designed for high-amperage systems, typically ranging from 800 to 5000A, providing reliable protection beyond MCCB limits. 

• Their insulated construction enhances safety by reducing arc flash exposure in demanding electrical environments. 

• Recertified ICCBs are tested to OEM specifications and backed by a two-year warranty and 30-day return policy. 

• Hard-to-find and discontinued ICCBs are available, with expert support to identify compatible replacements quickly.

Essential Electric Supply is a leading power distribution supplier for in-stock and hard-to-find Insulated Case Circuit Breakers (ICCBs), delivering new, recertified, surplus, and obsolete units with same-day shipping. When high-capacity power systems fail, or timelines are tight, we help electricians and contractors secure the exact ICCB you need fast, including discontinued models most suppliers can’t source.

An insulated case circuit breaker (ICCB) is a high-capacity protection device designed for applications that exceed the current limits of a molded case circuit breaker (MCCB) but don't require the full draw-out serviceability of an air circuit breaker (ACB). ICCBs are typically rated from 800 to 5000A and feature solid, heat-resistant insulated construction that reduces arc flash exposure and improves safety in high-current environments. Common applications include main switchboards, large commercial buildings, data centers, industrial distribution panels, and any facility where high-amperage branch protection and a compact footprint are both required.

Shop Our Insulated Case Circuit Breakers

We stock new, recertified, surplus, and obsolete ICCBs all in one place, from current production units to discontinued models that are increasingly difficult to source through standard channels.

Our inventory includes breakers from Siemens, Eaton, Square D, Schneider Electric, Cutler-Hammer, GE, ABB, and obsolete lines, with same-day shipping available on in-stock orders placed by 1:30 PM PST, 24-hour emergency support, and a two-year warranty on all recertified stock.

Every recertified insulated case circuit breaker is tested to OEM specifications before it ships. If the exact part you need has been discontinued, our team can identify authorized replacements and retrofits compatible with your existing switchboard or distribution panel. 

For urgent orders or large-volume requests, call our 24-hour support line or submit a quote request today.

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

• Two-year warranty on all recertified units

• 30-day return policy on all orders

Frequently Asked Questions

Do you offer same-day shipping on insulated case circuit breakers?

Yes. Orders placed by 1:30 PM PST on in-stock insulated case 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 regardless of location.

Do you stock obsolete and discontinued ICCB brands?

Yes. We carry obsolete and discontinued ICCBs from brands including Siemens, Eaton, Square D, Cutler-Hammer, GE, and ABB — including models that have been off the market for years. If you're sourcing for an aging switchboard or distribution panel 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 ICCBs tested before shipping?

Yes. Every recertified insulated case 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.

What if the exact ICCB I need is no longer available?

Reach out to our team, and we'll help find what you need. Have your catalog number or part number ready, and if the breaker is still installed, photos of the label from multiple angles — showing amperage, voltage rating, frame type, and pole configuration — will help our team move quickly. If the exact unit is no longer available, we can identify authorized replacements or retrofits that are compatible with your existing panel or switchboard.