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.

FPE NP631200 Circuit Breaker 2000 Amp 600 Volt AC M/O F/M

Federal Pacific NP631200 Circuit Breaker; cat# NP631200STP-3, 2000 amp, 600 volt AC, 3 pole. With shunt trip- 120 volts AC, manually operated (M/O), fixed-mount (F/M). Used tested with report.
SKU: MCCB2073
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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

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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HR3-F200 ITE Circuit Breaker 2000 Amp 600 VAC M/O F/M

ITE HR3-F200 circuit breaker; 2000 amp, 600 volt AC, 3 pole. With 2000 amp trip, shunt trip cat# S01HPORO, manually operated (M/O), fixed mount (F/M), mounting plate, used tested with report.
SKU: MCCB1675
$3,900.00

Merlin-Gerin Masterpact MP20H1 Circuit Breaker 2000 Amp 600 VAC E/O D/O

Merlin-Gerin MP20H1 Masterpact circuit breaker: 2000 amp, 600 volt AC, 3 pole. With 2000 amp rating plug cat# 54758, STR38S trip unit with LSIG functions, ground fault, overcurrent trip switch, auxiliary switches, shunt trip, alarm switch, electrically operated (E/O), draw-out (D/O), draw-out cubicle, used tested with report.
SKU: MCCB1385
$6,900.00

PAF20361433 Square D Breaker 2000 Amp 600 VAC

Square D PAF20361433 breaker; series 4, 2000 amp, 600 volt AC, 3 pole. With 1600 amp trip unit, shunt trip- 48 VDC, auxiliary switch, used tested with report. *Bent Mounting Foot* *No Handle*
SKU: MCCB1334
$3,000.00

PAF2036M012248 Square D Breaker 2000 Amp 600 VAC E/O

Square D PAF2036M012248 breaker; series 3, 2000 amp, 600 volt AC, 3 pole. With 1600 amp trip unit, shunt trip- 120 to 240 VAC, 50/60 HZ, auxiliary switch, alarm switch- 240 VAC, 50/60 HZ, electrically operated (E/O), used tested with report.
SKU: MCCB1311
$4,500.00

PAF2600001433 Square D Molded Case Switch 2000 Amp 2 Pole 600 VAC

Square D PAF2600001433 molded case switch; series 4, 2000 amp, two pole, auxiliary switch, shunt trip- 48 VDC, used tested with report. *No Handle*
SKU: MCCB1336
$1,200.00

PB32000F Westinghouse Breaker (MCP) 2000 Amp 600 VAC

Westinghouse PB32000F breaker (MCP); 2000 amp, 600 volt AC, 3 pole. With 2000 amp mag-only trip, shunt trip- 24 VDC, auxiliary switch- 120 VAC, used tested with report.
SKU: MCCB1229
$2,400.00

PB32000F Westinghouse Breaker (MCP) 2000 Amp 600 VAC

Westinghouse PB32000F circuit breaker (MCP); 2000 amp, 600 volt AC, 3 pole. With 2000 amp mag-only trip, shunt trip- 24 VDC, auxiliary switch- 120 VAC- 2A-2B, used tested with report.
SKU: MCCB1241
$2,400.00

PB32000F Westinghouse Breaker (MCP) 2000 Amp 600 VAC

Westinghouse PB32000F circuit breaker (MCP); 2000 amp, 600 volt AC, 3 pole. With 2000 amp mag-only trip, shunt trip- 24 VDC, auxiliary switch- 2A-2B- 120 VAC, used tested with report.
SKU: MCCB1236
$2,400.00

PC32000FM Westinghouse Breaker 2000 Amp 600 VAC M/O F/M

Westinghouse PC32000FM circuit breaker; cat# PC32000FM, 2000 amp, 600 volt AC, 3 pole. With 2000 amp rating plug, shunt trip, (3) auxiliary switches, manually operated (M/O), fixed mount (F/M), used tested with report.
SKU: MCCB1738
$2,400.00

PHF3616001386 Square D Breaker 2000 Amp 600 VAC M/O F/M

Square D PHF3616001386 circuit breaker; 2000 amp frame, 600 volt AC, 3 pole. With 1600 amp rating tower, shunt trip- 24 VDC, auxiliary switch- 15.1A @ 120-250 VAC, .5A @125 VDC, .25A @ 250 VDC, manually operated (M/O), fixed mount (F/M), used tested with report.
SKU: MCCB1758
$2,700.00

PHF3616001386 Square D Breaker 2000 Amp 600 VAC M/O F/M

Square D PHF3616001386 circuit breaker; 2000 amp frame, 600 volt AC, 3 pole. With 1600 amp rating tower, shunt trip- 24 VDC, auxiliary switch- 15.1A @ 120-250 VAC, .5A @125 VDC, .25A @ 250 VDC, manually operated (M/O), fixed mount (F/M), used tested with report.
SKU: MCCB1759
$2,700.00

PHF3616001386 Square D Breaker 2000 Amp 600 VAC M/O F/M

Square D PHF3616001386 circuit breaker; 2000 amp frame, 600 volt AC, 3 pole. With 1600 amp rating tower, shunt trip- 24 VDC, auxiliary switch- 15.1A @ 120-250 VAC, .5A @125 VDC, .25A @ 250 VDC, manually operated (M/O), fixed mount (F/M), used tested with report.
SKU: MCCB1764
$2,700.00

PHF3616001386 Square D Breaker 2000 Amp 600 VAC M/O F/M

Square D PHF3616001386 circuit breaker; 2000 amp frame, 600 volt AC, 3 pole. With 1600 amp rating tower, shunt trip- 24 VDC, auxiliary switch- 15.1A @ 120-250 VAC, .5A @125 VDC, .25A @ 250 VDC, manually operated (M/O), fixed mount (F/M), used tested with report.
SKU: MCCB1765
$2,700.00

PHF3616001674 SQ.D Breaker 2000 Amp 600 VAC E/O F/M

Square D PHF3616001674 circuit breaker; 2000 amp, 600 volt AC, 3 pole. With 1600 amp trip unit, LSG functions, ground fault, auxiliary switch, shunt trip, electrically operated (E/O) cat.# PAM02, fixed mount (F/M), used tested with report.
SKU: MCCB1573
$3,900.00

SCB-2000 Westinghouse Breaker Non-Auto 2000 Amp 600 VAC M/O

Westinghouse SCB-2000 circuit breaker; non-auto, 2000 amp, 600 volt AC, 3 pole, shunt trip- 120 VAC, manually operated (M/O), used tested with report.
SKU: MCCB1210
$1,500.00

SED362000LSGES5D8 Square D Breaker 2000 Amp 600 VAC LSIG ARP100 Rating Plug M/O D/O

Square D SED362000LSGES5D8 Breaker; 2000 amp, 600 VAC, three pole. Micrologic full function series "B" trip unit with LSIG functions, ARP100 rating plug. Manually operated (M/O), draw-out (D/O), with cubicle, with accessories. Used tested with report.
SKU: MCCB1838
$15,500.00

SPB100 Westinghouse Pow-R Breaker 2000 Amp 600 VAC E/O F/M

Westinghouse SPB100 Pow-R breaker; 2000 amp Digitrip RMS600 trip unit, cat.# T63CLS 2000 amp rating plug. Cat.# PD6S20A200 shunt trip, cat.# SPBSTEO024D aux. switch, cat.# SPAUX304 elect. operator, cat.# SPBEO120A 600 VAC electrically operated (E/O), fixed mount (F/M), used tested with report.
SKU: MCCB1800
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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.