1-800-328-1842
Browse EMSCO's online catalog Browse Store
Busway & Plugs
Bus Plugs Bus Duct Tap Boxes & Accessories
Circuit Breakers
Molded & Insulated Case Circuit Breakers Air Circuit Breakers Vacuum Circuit Breakers Motor Circuit Protectors
Switches
Panelboard Switches Pressure Contact Switches Safety Switches Transfer Switches
Motor Control
MCC Buckets & Structure Starters Variable-Frequency Drive (VFD)
Switchgear
Low Voltage Switchgear Medium Voltage Switchgear
Transformers
Low Voltage Transformers Medium Voltage Transformers Auto-Transformers

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
Indoor/Outdoor
Main Type
Operation
Phase
Poles
Series
Shunt Trip
Style
Voltage
Wire
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 Square D QED Power Style Switchboard 3000 Amp Fusible Main 480Y/277 Volt 3 Ph 4 W NEMA 1 R&G

Square D QED Power Style Switchboard 3000 Amp Fusible Main 480Y/277 Volt 3 Ph 4 W NEMA 1 R&G

Square D QED Power Style Switchboard; 3000 amp fusible main, 480Y/277 volt, 3 phase, 4 wire, ground fault, NEMA 1 indoor rated. Reconditioned & guaranteed with a one-year warranty.
SKU: M659
Contact us for pricing:
View product
Picture of Square D RJ1600 PowerPact Circuit Breaker RJF36160JK 1600 Amp 600 Volt AC M/O F/M

Square D RJ1600 PowerPact Circuit Breaker RJF36160JK 1600 Amp 600 Volt AC M/O F/M

Square D RJ1600 PowerPact Circuit Breaker; cat# RJF36160JK, 1600 amp, 600 volt AC, 3 pole, manually operated (M/O), fixed-mount (F/M). Used tested with report.
SKU: MCCB2049
Contact us for pricing:
View product
Picture of Square D RK1600 PowerPact Circuit Breaker RKF36160CU464AE1AABC 1600A 600 VAC F/M M/O

Square D RK1600 PowerPact Circuit Breaker RKF36160CU464AE1AABC 1600A 600 VAC F/M M/O

Square D RK1600 PowerPact Circuit Breaker; cat# RKF36160CU464AE1AABC, 1600 amp, 600 volt AC, 3 pole. With Micrologic 6.0P, LSIG functions, ground fault, 1600 amp rating plug, fixed-mount (F/M), manually operated (M/O). Used tested with report.
SKU: MCCB2002
$15,000.00
View product Add to cart
Picture of Square D SED363000LSA4 Circuit Breaker 3000A 600 VAC M/O D/O

Square D SED363000LSA4 Circuit Breaker 3000A 600 VAC M/O D/O

Square D SED363000LSA4 Circuit Breaker; 3000 amp, 600 volt AC, 3 pole. With micrologic standard series B, LSI functions, ARP100 rating plug, manually operated (M/O), draw-out (D/O), used tested with report.
SKU: MCCB1989
Contact us for pricing:
View product
Picture of Square D SEFG30 Circuit Breaker 3000 Amp 600 Volt AC M/O F/M

Square D SEFG30 Circuit Breaker 3000 Amp 600 Volt AC M/O F/M

Square D SEFG30 Circuit Breaker; 3000 amp, 600 volt AC, 3 pole. With AC Pro trip unit, manually operated (M/O), draw-out (D/O). Used tested with report.
SKU: MCCB2094
Contact us for pricing:
View product
Picture of Square D SEFG30 Solid State Trip Circuit Breaker 3000 Amp 600 Volt AC M/O F/M

Square D SEFG30 Solid State Trip Circuit Breaker 3000 Amp 600 Volt AC M/O F/M

Square D SEFG30 solid state trip circuit breaker; 3000 amp, 600 volt AC, 3 pole. With micro logic trip unit cat# S930LIGA, LIG functions, ground fault, manually operated (M/O), fixed-mount (F/M). Used tested with report.
SKU: MC-CB#2063
Contact us for pricing:
View product
Picture of SSD16B216 GE Power Break II 1600 Amp 600 VAC EO/DO LSIG

SSD16B216 GE Power Break II 1600 Amp 600 VAC EO/DO LSIG

General Electric SSD16B216 Power Break II; 1600 amp, 600 volt AC, 3 pole. With Micro Versa Trip plus trip unit cat# B216LSIG, 1600 amp rating plug cat# TR16B1600, shunt trip cat # SPST024- 24 VAC, bell alarm cat# SPBAA240- 240 VAC, electric operator cat# SPE120- 120 VAC, remote close cat# SPRCS024- 24 VDC, electrically operated (E/O), draw-out (D/O), used tested with report.
SKU: MCCB1843
Contact us for pricing:
View product
Picture of SSD16B216 GE Power Break II Breaker 1600 Amp 600 VAC E/O

SSD16B216 GE Power Break II Breaker 1600 Amp 600 VAC E/O

General Electric SSD16B216 Power Break II Circuit Breaker; 1600 amp, 600 volt AC, 3 pole. With 600 amp rating plug. cat.# TR16B600, electrically operated (E/O)- 120 volt AC cat.# SPE120, remote close cat.# SPRCS120, draw-out (D/O), used tested with report.
SKU: MCCB1125
$8,500.00
View product Add to cart
Picture of SSD16B216 GE Power Break II Breaker 1600 Amp 600 Volt AC E/O D/O

SSD16B216 GE Power Break II Breaker 1600 Amp 600 Volt AC E/O D/O

General Electric SSD16B216 Power Break II Circuit Breaker; 1600 amp, 600 volt AC, 3 pole. With 600 amp rating plug cat.#TR16B600, electrically operated (E/O), draw-out (D/O), used tested with report.
SKU: MCCB1001
$8,500.00
View product Add to cart
Picture of SSD30D330 GE Power Break Breaker 3000 Amp 600 VAC E/O D/O

SSD30D330 GE Power Break Breaker 3000 Amp 600 VAC E/O D/O

General Electric SSD30D330 Power Break breaker; 3000 amp, Entelliguard TU trip unit, cat.# GB530L3XXXRXXXX with 3000 amp rating plug. Cat.# GTP3000U3064 with auxiliary switch, 240 VAC, 125/250 VDC with shunt trip 24 VAC, 50/60Hz. 24VDC, cat.# SPST024 600 VAC, electrically operated (E/O), 120 VAC, 50/60 Hz. cat.# SPE120 remote close, 120 VAC 50/60Hz. Cat.# SPRC120, draw-out (D/O), used tested with report.
SKU: MCCB1520
$15,000.00
View product Add to cart
Picture of SSD30D330 GE Power Break II Circuit Breaker 3000 Amp 600 VAC E/O D/O

SSD30D330 GE Power Break II Circuit Breaker 3000 Amp 600 VAC E/O D/O

General Electric SSD30D330 Power Break II circuit breaker; 3000 amp, Entelliguard TU trip unit, cat.# GB530L3XXXRXXXX with auxiliary switch- 240 VAC- 125/250 VDC, shunt trip- 24 VAC, 50/60Hz. 24 VDC. Cat.# SPST024, 600 VAC, electrically operated (E/O), 120 VAC, 50/60 Hz. cat.# SPE120, remote close, 120 VAC, 50/60Hz. cat.# SPRC120, draw-out (D/O), used tested with report *Missing trip cover & upper hinge broken off*.
SKU: MCCB1519
$15,000.00
View product Add to cart
Picture of SSD30D330 GE Power Break II Circuit Breaker 3000 Amp 600 VAC E/O D/O

SSD30D330 GE Power Break II Circuit Breaker 3000 Amp 600 VAC E/O D/O

General Electric SSD30D330 Power Break II circuit breaker; 3000 amp, Entelliguard TU trip unit, cat.# GB530L3XXXRXXXX with auxiliary switch, 240 VAC, 125/250 VDC with shunt trip 24 VAC, 50/60Hz. 24 VDC. Cat.# SPST024 600 VAC electrically operated (E/O), 120 VAC, 50/60 Hz. cat.# SPE120, remote close, 120 VAC, 50/60Hz. cat.# SPRC120, draw-out (D/O), used tested with report.
SKU: MCCB1521
$15,000.00
View product Add to cart
Picture of SSD30D330 GE Power Break II Circuit Breaker 3000 Amp 600 VAC E/O D/O

SSD30D330 GE Power Break II Circuit Breaker 3000 Amp 600 VAC E/O D/O

General Electric SSD30D330 Power Break II circuit breaker; 3000 amp Entelliguard TU trip unit, cat.# GB530L3XXXRXXXX with 3000 amp rating plug. Cat.# GTP3000U3064 with auxiliary switch 240 VAC, 125/250 VDC, 600 VAC, electrically operated (E/O), 120 VAC, 50/60 Hz. cat.# SPE120 remote close, 120 VAC, 50/60Hz. cat.# SPRC120 draw-out (D/O), used tested with report. *Missing Trip Cover* *Electrically Operated Switch Broken*
SKU: MCCB1523
$15,000.00
View product Add to cart
Picture of TC1616SS GE Power Break Breaker 1600 Amp 600 VAC M/O D/O

TC1616SS GE Power Break Breaker 1600 Amp 600 VAC M/O D/O

General Electric TC1616SS Power Break Circuit Breaker; 1600 amp, 600 volt AC, 3 pole. With 1600 amp rating plug cat.# TR16S1600, Micro Versa Trip RMS-9 cat.#TS20LSI, LSI functions, power break substructure cat.# TDOS16, manually operated (M/O), draw-out (D/O), used tested with report.
SKU: MCCB1028
$5,100.00
View product Add to cart
Picture of TC2020SS GE Power Break 2000 Amp 600 VAC M/O D/O

TC2020SS GE Power Break 2000 Amp 600 VAC M/O D/O

General Electric TC2020SS Power Break; 2000 amp, 600 volt AC, 3 pole. With Micro Versa Trip RMS-9 cat# TS20LSIT1, LSI functions, manually operated (M/O), draw-out (D/O), power break substructure cat.#TD0S20. Used tested with report.
SKU: MCCB1262
$6,600.00
View product Add to cart
Picture of TC2020SS GE Power Break Breaker 2000 Amp 600 VAC M/O D/O

TC2020SS GE Power Break Breaker 2000 Amp 600 VAC M/O D/O

General Electric TC2020SS Power Break Circuit Breaker; 2000 amp, 600 volt AC, 3 pole. With 2000 amp rating plug cat.#TR20S2000, Micro Versa Trip cat.# TS20LSIGT2, LSIG functions, ground fault, manually operated (M/O), draw-out (D/O), used tested with report.
SKU: MCCB1128
$6,600.00
View product Add to cart
Picture of TC2020SS GE Power Break Breaker 2000 Amp 600 VAC M/O D/O

TC2020SS GE Power Break Breaker 2000 Amp 600 VAC M/O D/O

General Electric TC2020SS Power Break circuit breaker; 2000 amp, 600 volt AC, 3 pole. With Micro Versa Trip RMS-9, LIG, ground fault, 2000 amp rating plug cat.# TR20S2000, manually operated (M/O), draw-out (D/O), draw-out carriage cat.# TDOS20, used tested with report.
SKU: MCCB1661
$6,600.00
View product Add to cart
Picture of TC2020SS GE Power Break Breaker 2000 Amp 600 VAC M/O D/O

TC2020SS GE Power Break Breaker 2000 Amp 600 VAC M/O D/O

General Electric TC2020SS Power Break circuit breaker; 2000 amp, 600 volt AC, 3 pole. With Micro Versa Trip RMS-9, LIG, ground fault, 2000 amp rating plug cat.# TR20S2000, manually operated (M/O), draw out (D/O), draw-out carriage cat.# TDOS20, used tested with report.
SKU: MCCB1662
$6,600.00
View product Add to cart
Picture of TC2020SS GE Power Break Circuit Breaker 2000 Amp 600 VAC M/O D/O

TC2020SS GE Power Break Circuit Breaker 2000 Amp 600 VAC M/O D/O

General Electric TC2020SS Power Break Circuit Breaker; 2000 amp, 600 volt AC, 3 pole. With RMS-9 Micro Versa Trip cat.# TS20LIG, LIG functions, ground fault, 2000 amp rating plug cat.# TR20S2000, manually operated (M/O), draw out (D/O), draw-out carriage cat.# TDOS20, used tested with report.
SKU: MCCB1637
$6,600.00
View product Add to cart
Picture of TC2020TTHE1R GE Power Break Breaker 2000 Amp 600 VAC W/Auxiliaries and Shunt E/O D/O

TC2020TTHE1R GE Power Break Breaker 2000 Amp 600 VAC W/Auxiliaries and Shunt E/O D/O

General Electric TC2020TTHE1R Power Break; 2000 amp, 600 VAC with 2000 amp rating plug with Micro Versa Trip PM. Cat# C220LSHMR with auxiliaries and shunt control voltage 120 VAC, electrically operated (E/O), draw-out (D/O), used tested with report.
SKU: MCCB1008
$6,300.00
View product Add to cart

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.