Molded & Insulated Case Circuit Breakers

While our website showcases a large assortment of our products, it does not reflect the complete inventory of products currently available. For real-time availability and to ensure we can meet your specific needs, please contact our sales team at 1-800-328-1842. New products arrive daily and our knowledgeable staff are happy to assist you in locating the exact item(s) you need.

Eaton RGH65K Circuit Breaker RGH316038E 1600 Amp 600 Volt AC F/M M/O

Eaton RGH65K Circuit Breaker; cat# RGH3156038E, 1600 amp, 600 volt AC, 3 pole. With RT316038 trip unit, LSI functions, fixed-mount (F/M), manually operated (M/O). Used tested with report.
SKU: MCCB2048
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GE Power Break TPSS7625SG Circuit Breaker 2500A 600 VAC M/O F/M

General Electric Power Break TPSS7625SG Circuit Breaker; 2500 amp, 600 volt AC, 3 pole. With Solid State VersaTrip Mod 2 trip unit- serial# V28521A, LSIG functions, ground fault, fixed-mount (F/M), manually operated (M/O), used tested with report.
SKU: MCCB2011
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GE Power Break TPSS9640SG Circuit Breaker 4000A 600 VAC M/O F/M

General Electric Power Break TPSS9640SG Circuit Breaker; 4000 amp, 600 volt AC, 3 pole. With AC-Pro-VST trip unit, fixed-mount (F/M), manually operated (M/O). Used tested with report.
SKU: MCCB2024
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General Electric PowerBreak TPSS6620GB Circuit Breaker 2000 Amp 600 Volt AC M/O F/M

General Electric PowerBreak TPSS6620GB Circuit Breaker; 2000 amp, 600 volt AC, 3 pole. With versatrip solid state, LIG functions, ground fault, manually operated (M/O), fixed-mount (F/M). Used tested with report.
SKU: MCCB2100
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HNXD62B100 ITE & Siemens Circuit Breaker

ITE & Siemens HNXD62B100 circuit breaker; 1000 amp, 600 volt, two pole, used electrically OK.
SKU: HNXD62B100
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HNXD62B120 ITE & Siemens Circuit Breaker

ITE & Siemens HNXD62B120 circuit breaker; 1200 amp, 600 volt, two pole, used electrically OK.
SKU: HNXD62B120
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HNXD62B900 ITE & Siemens Circuit Breaker

ITE & Siemens HNXD62B900 circuit breaker; 900 amp, 600 volt, two pole, used electrically OK.
SKU: HNXD62B900
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HNXD63B100 ITE & Siemens Circuit Breaker

ITE & Siemens HNXD63B100 circuit breaker; 1000 amp, 600 volt, three pole, line & load side lugs. Used tested with report.
SKU: HNXD63B100
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HNXD63B120 ITE & Siemens Circuit Breaker

ITE & Siemens HNXD63B120 circuit breaker; 1200 amp, 600 volt, three pole, line & load side lugs. Used tested with report.
SKU: HNXD63B120
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HNXD63B900 ITE & Siemens Circuit Breaker

ITE & Siemens HNXD63B900 circuit breaker; 900 amp, 600 volt, three pole, line & load side lugs. Used tested with report.
SKU: HNXD63B900
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THFK236F000 General Electric Circuit Breaker

General Electric THFK236F000 circuit breaker; 70 to 225 amp (select amperage to top right), 600 volt, three pole, line & load side lugs. Used tested with report.
SKU: THFK236F000
$800.00

TPSS3608DG3A3 GE Power Break Breaker 800 Amp 600 VAC M/O

General Electric TPSS3608DG3A3 Power Break Circuit Breaker; 800 amp, 600 volt AC, 3 pole. With solid state Versa Trip, LSG functions, ground fault, manually operated (M/O), used tested with report.
SKU: MCCB1066
$2,100.00

TPSS4612G GE Power Break Breaker 1200 Amp 600 VAC M/O D/O

General Electric TPSS4612G Power Break Circuit Breaker; 1200 amp, 600 volt AC, 3 pole. With solid state Versa Trip, LIG functions, ground fault, 600 volt AC, manually operated (M/O), draw-out (D/O), used tested with report.
SKU: MCCB1109
$3,600.00

TPSS4612SGB GE Power Break Breaker 1200 Amp 600 VAC LSIG MO/FM

General Electric TPSS4612SGB Power Break Circuit Breaker; 1200 amp, 600 volt AC, 3 pole. With Solid state Versa Trip, LSIG functions, ground fault, manually operated (M/O), fixed mount (F/M). Used tested with report.
SKU: MCCB1834
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TPSS6608 GE Power Break Breaker 800 Amp 600 VAC M/O D/O

General Electric TPSS6608 Power Break circuit breaker; 800 amp, 600 volt AC, 3 pole. With solid state Versa Trip unit, manually operated (M/O), draw out (D/O), used tested with report.
SKU: MCCB1754
$1,800.00

TPSS6608 GE Power Break Breaker 800 Amp 600 VAC M/O D/O

General Electric TPSS6608 Power Break circuit breaker: 800 amp, 600 volt AC, 3 pole. With solid state Versa Trip unit, manually operated (M/O), draw out (D/O), used tested with report.
SKU: MCCB1755
$1,800.00

TPSS6610 GE Power Break Breaker 1000 Amp 600 VAC M/O D/O

General Electric TPSS6610 Power Break breaker; 1000 amp, 600 volt AC, 3 pole. With solid state Versa Trip trip unit, manually operated (M/O), draw out (D/O), used tested with report.
SKU: MCCB1752
$3,300.00

TPSS6610 GE Power Break Breaker 1000 Amp 600 VAC M/O D/O

General Electric TPSS6610 Power Break breaker; 1000 amp, 600 volt AC, 3 pole. With solid state Versa Trip trip unit, manually operated (M/O), draw out (D/O), used tested with report.
SKU: MCCB1753
$3,300.00

TPSS6610DE1 GE Power Break Breaker 1000 Amp 600 VAC LSG E/O D/O

General Electric TPSS6610DE1 Power Break Circuit Breaker; 1000 amp, 600 volt AC, three pole, 120 control voltage. With solid state VersaTrip with LSG functions, ground fault, auxiliary switch, bell alarm- 6 amp, 120 to 240 VAC shunt trip, electrically operated (E/O), draw-out (D/O). Used tested with report.
SKU: MCCB1882
$3,900.00

TPSS6610DE1 GE Power Break Breaker 1000 Amp 600 VAC VersaTrip W/ LS EO/DO

General Electric TPSS6610DE1 Power Break Circuit Breaker; 1000 amp, 600 volt AC, three pole, 120 control voltage. With Solid State VersaTrip, LS functions, auxiliary switch, shunt trip, bell alarm, electrically operated (E/O), draw-out (D/O). Used tested with report.
SKU: MCCB1883
$3,900.00

New, Used, and Tested Molded & Insulated Case Circuit Breakers

EMSCO has been specializing in used and refurbished molded & insulated case circuit breakers for over 72 years.


Why Choose EMSCO for Molded Case or Insulated Case Circuit Breakers?

Want to match and replace your existing breakers? End the hassle of retrofitting your electrical system. Our extensive inventory includes a variety of Molded Case Circuit Breakers (MCCBs) and Insulated Case Circuit Breakers that are designed to seamlessly match and replace your existing breakers by brand, amp rating, voltage, frame size, or model.

New and Refurbished Products in Stock

We understand that budgets and preferences differ, so we give you the option of selecting between new and refurbished MCCBs or Insulated Case Breakers, both of which are readily available in our inventory. Choose brand-new circuit breakers for maximum performance and longevity, or look into our refurbished options, which have been rigorously tested and reconditioned to meet industry standards.

Popular Brands and Common Configurations

Our shelves are stocked with breakers from the most trusted and popular brands in the industry, ensuring you have access to dependable products. You'll find common configurations, such as different frame sizes and voltage ratings, making it simple to find the right circuit protection for your application.

Avoiding Costly Operational Downtime

Downtime can be an expensive situation. Our circuit protection products are designed for high performance and durability. You can avoid costly operational downtime due to electrical failures by using our fully-tested Molded Case or Insulated Case breakers. Our products provide reliable power and superior equipment protection.

Electrical Testing Equipment Certifying Quality and Performance

When it comes to the dependability and safety of your electrical systems, we leave nothing to chance. Our breakers are rigorously tested using current testing equipment to ensure that they meet or exceed industry standards. This ensures that your electrical installations are safe and efficient.

  • Overcurrent Protection: We verify that your breakers provide accurate overcurrent protection, guaranteeing the safety of your electrical systems.
  • Trip Time: We measure the time it takes for breakers to respond to overcurrent conditions, ensuring it operates within the specified trip time.
  • Short-Circuit Withstand Capacity: Our testing evaluates the breaker’s ability to withstand short-circuit currents, preventing damage and maintaining safety.
  • Interrupting Capacity: We determine the MCCB's capability to interrupt fault currents, ensuring the utmost protection for your electrical system.

Molded Case Circuit Breaker Specifications

A sample table of ampere ratings, corresponding voltage ratings, and frame sizes for molded case circuit breakers is shown below. Please keep in mind that frame sizes and ratings can differ between manufacturers and models. For precise details on a specific MCCB, always refer to the manufacturer's specifications.

Frame Size

Ampere Rating

Voltage Rating

A

15A

120V, 240V

A

20A

120V, 240V

B

30A

120V, 240V, 480V

B50A120V, 240V, 480V
C60A240V, 480V
C100A240V, 480V
D150A240V, 480V, 600V
D200A240V, 480V, 600V
E250A240V, 480V, 600V
E300A240V, 480V, 600V
F400A240V, 480V, 600V
F600A240V, 480V, 600V
G800A240V, 480V, 600V
G1200A240V, 480V, 600V
H1600A240V, 480V, 600V

This table is a sample representation of frame sizes, ampere ratings, and voltage ratings for Molded Case Circuit Breakers, not an exhaustive list.

Molded case circuit breakers (MCCBs) and insulated case circuit breakers (ICCBs) are two distinct types of circuit protection devices used in electrical systems. Both serve the purpose of interrupting electrical currents in case of faults or overloads, but they differ in construction, application, and performance characteristics. Need Help Now? Call 800-328-1842.