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.

LDC2300 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC2300 circuit breaker; 300 amp, 600 volt, two pole, 35 kAIC @ 480 volt AC, used electrically OK.
SKU: LDC2300
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LDC2350 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC2350 circuit breaker; 350 amp, 600 volt, two pole, 100 kAIC @ 480 volt AC, used electrically OK.
SKU: LDC2350
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LDC2400 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC2400 circuit breaker; 400 amp, 600 volt, two pole, 100 kAIC @ 480 volt AC, used electrically OK.
SKU: LDC2400
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LDC2450 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC2450 circuit breaker; 450 amp, 600 volt, three pole, 35 kAIC @ 480 volt AC, used tested with report.
SKU: LDC2450
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LDC2500 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC2500 circuit breaker; 500 amp, 600 volt, two pole, 100 kAIC @ 480 volt AC, used electrically OK.
SKU: LDC2500
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LDC2600 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC2600 circuit breaker; 600 amp, 600 volt, two pole, 100 kAIC @ 480 volt AC, used electrically OK.
SKU: LDC2600
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LDC3300 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC3300 circuit breaker; 300 amp, 600 volt, three pole, 100 kAIC @ 480 volt AC, used tested with report.
SKU: LDC3300
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LDC3350 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC3350 circuit breaker; 350 amp, 600 volt, three pole, 100 kAIC @ 480 volt AC, used tested with report.
SKU: LDC3350
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LDC3400 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC3400 circuit breaker; 400 amp, 600 volt, three pole, 100 kAIC @ 480 volt AC, line & load side lugs. Used tested with report.
SKU: LDC3400
$1,500.00

LDC3450 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC3450 circuit breaker; 450 amp, 600 volt, three pole, 100 kAIC @ 480 volt AC, line & load side lugs. Used tested with report.
SKU: LDC3450
$1,500.00

LDC3500 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC3500 circuit breaker; 500 amp, 600 volt, three pole, 100 kAIC @ 480 volt AC, line & load side lugs. Used tested with report.
SKU: LDC3500
$1,500.00

LDC3600 Cutler-Hammer Circuit Breaker

Cutler-Hammer LDC3600 circuit breaker; 600 amp, 600 volt, three pole, 100 kAIC @ 480 volt AC, line & load side lugs. Used tested with report.
SKU: LDC3600
$1,500.00

PAF2036 Square D Breaker 2000 Amp 600 VAC

Square D PAF2036 breaker; series 3, 2000 amp, 600 VAC, 3 pole, used tested with report.
SKU: MCCB1315
$3,300.00

PAF2036 Square D Breaker 2000 Amp 600 VAC

Square D PAF2036 breaker; 2000 amp, 600 volt AC, 3 pole. With 1600 amp trip cat.# PA31600RC, used tested with report.
SKU: MCCB1362
$3,300.00

PAF2036 Square D Breaker 2000 Amp 600 VAC M/O F/M

Square D PAF2036 breaker; 2000 amp, 600 volt AC, 3 pole, 1200 amp rating tower, manually operated (M/O), fixed mount (F/M), used tested with report.
SKU: MCCB1806
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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

PAF361000 Square D Breaker 2000 Amp 600 VAC

Square D PAF361000 circuit breaker; 2000 amp, 600 volt AC, 3 pole, 700 amp trip unit, used tested with report.
SKU: MCCB1328
$2,100.00

PAF361200DC180 Square D Breaker 1200 Amp 500 VDC

Square D PAF361200DC180 circuit breaker; 1200 amp, 500 VDC, 3 pole, auxiliary switch, under voltage trip- 48 VDC, used tested with report.
SKU: MCCB1470
$1,800.00

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.