Insulated Case Breakers
New and used insulated case breakers from all major manufacturers
Square D
Square D RKF36160CU33A Circuit Breaker 1600A 3P 600V PowerPact 65kA R-Frame
LS Electric
LS Electric UAH-40G3-40A Circuit Breaker 4000A 3P 635V 3PH UAH 4000 Amp
LS Electric
LS Electric UAH-16E3-16A Circuit Breaker 1600A 3P 635V 3PH UAH 1600 Amp
Square D
Square D SED364000LIG
Square D
Square D NW16N
Square D
Square D NW16N
GE
GE AKR-8D-50-1
Siemens
Siemens 3WL1120-2AA31-5FF4-Z WL I 2000 N Circuit Breaker 2000A 3P 600V
Browse More Categories
Panelboards
Main lug and main breaker panelboards
Switchboards
Main distribution and metering equipment
Dry Type Transformers
5 to 500 kVA for indoor installation
Circuit Breakers
Molded case breakers from 15 to 2,500 Amp
MCC Buckets
Motor control center plug-in units
Safety Switches
Fusible and non-fusible disconnects
Insulated Case Breakers: 800 to 4,000 Amp
We stock insulated case circuit breakers for heavy industrial and commercial power distribution. These large-frame breakers from Square D, Eaton/Cutler-Hammer, Siemens, GE, and ABB cover ratings from 800 to 4,000 amps and are built for demanding main and tie applications.
Insulated case breakers are long-lead, high-cost items when purchased new. Our inventory gives you access to tested, verified units that can ship quickly—keeping your project on schedule and your budget intact.
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Our inventory changes daily. If you don't see the exact part or configuration you're looking for, reach out and we'll get you a quote. Chances are we have it in stock or can source it fast.
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