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Molded & Insulated Case Circuit Breakers

Home > Store > Circuit Breakers > Molded & Insulated Case Circuit Breakers

Manufacturer
Amperage
Condition
Family
Fixed Mount or Draw Out
Frame
Functions
Ground Fault
Operation
Poles
Series
Shunt Trip
Voltage
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.
Picture of Cutler-Hammer Magnum DS MDSC16 Circuit Breaker 1600A Frame 635V E/O D/O

Cutler-Hammer Magnum DS MDSC16 Circuit Breaker 1600A Frame 635V E/O D/O

Cutler-Hammer MDSC16 Magnum DS low voltage AC power circuit breaker; cat # MDSC163WEA 16MEC NAN4Y CNNAX, 1600 amp frame, 635 volt, 3 pole. With Digitrip 520M trip unit cat# 5MLSIA, LSI functions, 1600 amp rating plug, motor operator- 110/125 VAC, trip unit power- 24 VDC, auxiliary switches, test report, electrically operated (E/O), draw-out (D/O). Used tested with report.
SKU: MCCB1887
$4,500.00
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Picture of Cutler-Hammer MDS4083 Magnum DS 800 Amp 600 VAC Molded Case Switch D/O

Cutler-Hammer MDS4083 Magnum DS 800 Amp 600 VAC Molded Case Switch D/O

Cutler-Hammer MDS4083 Magnum DS low voltage AC power circuit breaker; cat # MDS408WEA NNNNA WAN6E PNNAX, 800 amp, 600 volt AC, 3 pole. With draw-out (D/O), motor operator- 110-125 VAC/DC- 50/60 HZ, auxiliary switch- 6A/6B. Used tested with report.
SKU: MCCB1461
$1,200.00
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Picture of Cutler-Hammer RD65K Circuit Breaker 2000 Amp 600 Volt AC M/O F/M

Cutler-Hammer RD65K Circuit Breaker 2000 Amp 600 Volt AC M/O F/M

Cutler-Hammer RD65K Circuit Breaker; cat# RD320T32W, 2000 amp, 600 volt AC, 3 pole. With digitrip RMS310 trip unit cat# RES2000LSI, LSI functions, 2000 amp rating plug cat# 20RES20T, manually operated (M/O), fixed-mount (F/M). Used tested with report.
SKU: MCCB2076
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Picture of Cutler-Hammer RDC316T33W Circuit Breaker 1600A 600VAC M/O F/M

Cutler-Hammer RDC316T33W Circuit Breaker 1600A 600VAC M/O F/M

Cutler-Hammer RDC100K Breaker: Cat # RDC316T33W, 1600 amps, 600 VAC. With digitrip RMS310 cat # RES1600LS, 1600 amp rating plug cat # 16RES16T, manually operated, fixed mount. Used tested with report.
SKU: MCCB1975
$6,500.00
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Picture of GE EE08N1 Entelliguard E Power Circuit Breaker 2000A Frame 800A Sensor 3P 635V E/O D/O

GE EE08N1 Entelliguard E Power Circuit Breaker 2000A Frame 800A Sensor 3P 635V E/O D/O

General Electric EntelliGuard E EE08N1 Low Voltage Power Circuit Breaker: 2000 amp frame, 800 amp sensor, three pole, 635 volt, 100% rated. Entelliguard E trip unit, for use with EntelliGuard messenger Entellisys, electrically operated (120 volt AC closing coil), 120 volt AC shunt trip, used tested with report.
SKU: MCCB1827
$6,500.00
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Picture of GE EE32N2 Entelliguard E 3200A 3P 635V Power Circuit Breaker E/O D/O

GE EE32N2 Entelliguard E 3200A 3P 635V Power Circuit Breaker E/O D/O

General Electric EntelliGuard E Low Voltage Power Circuit Breaker: cat# EE32N2, 3200 amp frame, 3200 amp sensor, three pole, 635 volt, 100% rated. Entelliguard E trip unit cat# EE32N2ENXX, for use with EntelliGuard messenger Entellisys, electrically operated (120 volt AC), 120 volt AC shunt trip, used tested with report.
SKU: MCCB1826
$10,000.00
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Picture of GE Power Break Circuit Breaker TC1616SSE1 1600A 600 VAC D/O E/O

GE Power Break Circuit Breaker TC1616SSE1 1600A 600 VAC D/O E/O

General Electric Power Break Circuit Breaker; cat# TC1616SSE1, 1600 amp, 600 volt AC, 3 pole, 120 volt AC control voltage. With RMS-9 micro versa-trip cat# TS20LIT1, LI functions, 1600 amp rating plug cat# TR16S1600, auxiliary switch, bell alarm, shunt trip, draw-out (D/O), electrically operated (E/O), used tested with report.
SKU: MCCB1985
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Picture of GE Power Break Circuit Breaker TPVF6620B 2000A 600 VAC F/M M/O

GE Power Break Circuit Breaker TPVF6620B 2000A 600 VAC F/M M/O

General Electric Power Break Circuit Breaker; cat# TPVF6620B, 2000 amp, 600 volt AC, 3 pole. With micro versa trip, LI functions, shunt trip, fixed mount (F/M), manually operated (M/O), used tested with report.
SKU: MCCB1983
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Picture of GE Power Break Circuit Breaker TPVVF7625E1 2500A 600 VAC F/M E/O

GE Power Break Circuit Breaker TPVVF7625E1 2500A 600 VAC F/M E/O

General Electric Power Break Circuit Breaker; cat# TPVVF7625E1, 2500 amp, 600 volt AC, 3 pole, 120 volt AC control voltage. With micro versa trip cat# TP4VT30, LI functions, auxiliary switch, shunt trip, bell alarm, fixed mount (F/M), electrically operated (E/O), used tested with report.
SKU: MCCB1986
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Picture of GE Power Break THPMMF86 Circuit Breaker 3000 Amp 600 Volt AC M/O F/M

GE Power Break THPMMF86 Circuit Breaker 3000 Amp 600 Volt AC M/O F/M

General Electric Power Break THPMMF86 Circuit Breaker; 3000 amp, 600 volt AC, 3 pole. With shunt trip- 48 volt DC, auxiliary switch, manually operated (M/O), fixed-mount (F/M). Used tested with report.
SKU: MCCB2065
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Picture of GE Power Break TP84SS Breaker 400 Amp 600 Volt AC M/O F/M

GE Power Break TP84SS Breaker 400 Amp 600 Volt AC M/O F/M

General Electric Power Break TP84SS Circuit Breaker 400 amp, 600 volt AC, 3 pole. With RMS-9 MicroVersaTrip trip-unit cat# TS20LSI, LSI functions, 400 amp rating plug cat# TR4S400, manually operated (M/O), fixed-mount (F/M). Used tested with report.
SKU: MC-CB#2057
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Picture of GE Power Break TPSS9640SG Circuit Breaker 4000A 600 VAC M/O F/M

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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Picture of GE Power Break TPVF5616E1 Circuit Breaker 1600A 600 VAC M/O F/M

GE Power Break TPVF5616E1 Circuit Breaker 1600A 600 VAC M/O F/M

General Electric Power Break TPVF5616E1 Circuit Breaker; 1600 amp, 600 volt AC, 3 pole. With Micro VersaTrip cat# TP4VT20, LI functions, shunt trip- 24 VDC- 4.2 amps, auxiliary switch, bell alarm switch, fixed-mount (F/M), manually operated (M/O), used tested with report.
SKU: MCCB2010
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Picture of GE SSD30D330 Power-Break II Circuit Breaker 3000 Amp 600 Volt AC E/O D/O

GE SSD30D330 Power-Break II Circuit Breaker 3000 Amp 600 Volt AC E/O D/O

General Electric SSD30D330 Power-Break II Circuit Breaker; 3000 amp, 600 volt AC, three pole. With Power + trip unit cat# D330LSIT2, LSI functions, 3000 amp rating plug cat# TR30C3000GF, shunt trip cat# SPST120- 120 volt AC- 125 volt DC, electrically operated (E/O), draw-out (D/O), keyed interlock *Missing trip cover*, used tested with report.
SKU: MCCB1952
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Picture of General Electric Power Break TCYY9640 Circuit Breaker 4000 Amp 600 Volt AC 500 Volt DC M/O F/M Surplus

General Electric Power Break TCYY9640 Circuit Breaker 4000 Amp 600 Volt AC 500 Volt DC M/O F/M Surplus

General Electric Power Break TCYY9640 Circuit Breaker; 4000 amp, 600 volt AC, 500 volt DC, 3 pole, manually operated (M/O), fixed-mount (F/M). New Surplus
SKU: MCCB2103
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Picture of General Electric Power Break TP88SS Circuit Breaker 800 Amp 600 VAC M/O F/M

General Electric Power Break TP88SS Circuit Breaker 800 Amp 600 VAC M/O F/M

General Electric Power Break Circuit Breaker: cat# TP88SS, 800 amps, 600 volts AC, manually operated (M/O), fixed-mount (F/M). With 800 amp rating plug cat# TR8S800, RMS-9 MicroVersaTrip trip unit cat# TS20LSI. Used tested with report.
SKU: MCCB2056
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Picture of General Electric Power Break TPVF7625 Circuit Breaker 2500 Amp 600 Volt AC F/M M/O

General Electric Power Break TPVF7625 Circuit Breaker 2500 Amp 600 Volt AC F/M M/O

General Electric Power Break TPVF7625 Circuit Breaker; 2500 amp, 600 volt AC, 3 pole, fixed-mount (F/M), manually operated (M/O). With Micro Versa Trip cat# TP4VT30LI, shunt trip. Used tested with report.
SKU: MCCB2081
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Picture of General Electric PowerBreak TCYY9640 Circuit Breaker 4000 Amp 600 Volt AC 500 Volt DC M/O F/M Surplus

General Electric PowerBreak TCYY9640 Circuit Breaker 4000 Amp 600 Volt AC 500 Volt DC M/O F/M Surplus

General Electric PowerBreak Circuit Breaker; cat# TCYY9640, 4000 amp, 600 volt AC, 500 volt DC, 3 pole, manually operated (M/O), fixed-mount (F/M). New Surplus.
SKU: MCCB2102
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Picture of RDC320T33W Cutler-Hammer Breaker RDC 100k 2000 Amp 600 VAC M/O F/M

RDC320T33W Cutler-Hammer Breaker RDC 100k 2000 Amp 600 VAC M/O F/M

Cutler-Hammer RDC320T33W Circuit Breaker; RDC 100k, 2000 amp, 600 volt AC, three pole. With Digitrip RMS 310, 2000 amp rating plug cat # 20RES20T, manually operated (M/O), fixed-mount (F/M). Used tested with report.
SKU: MCCB1871
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Picture of SHD16B216 GE Power Break II Breaker 1600 Amp 600 VAC EO/DO

SHD16B216 GE Power Break II Breaker 1600 Amp 600 VAC EO/DO

General Electric SHD16B216 Power Break II Circuit Breaker; 1600 amp sensors, 600 volt AC, 3 pole. With 1600 amp rating plug cat.# TR16B600, Micro Versa Trip PM cat.#B216LSI, LSI functions, electrically operated (E/O), auxiliary switch, draw-out (D/O), used tested with report.
SKU: MCCB22727
$4,500.00
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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.