Air 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.

50H-3 Federal Pioneer Air Breaker 2000 Amp 600 Volt MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, three pole, AC pro trip type T361-V2, manually operated (120 volt AC), draw-out. Used electrically OK.
SKU: 50H-3 EMSCO#20805

50H-3 Federal Pioneer Air Breaker 2000A 600V MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, three pole, AC pro trip type T361-V2, manually operated, (120 volt AC), draw-out. Used electrically OK.
SKU: 50H-3 EMSCO#20806

50H-3 Federal Pioneer Air Breaker 2000A 600V MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, three pole, AC pro trip type T361-V2, manually operated (120 volt AC), draw-out, used electrically OK.
SKU: 50H-3 EMSCO#20808

50H-3 Federal Pioneer Air Breaker 2000A 600V MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, three pole, AC pro trip type T361-V2, manually operated, draw-out. Used electrically OK.
SKU: 50H-3 EMSCO#20809

50H-3 Federal Pioneer Air Breaker 2000A 600V MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, three pole, AC pro trip type T361-V2, manually operated (120 volt AC), draw out. Used electrically OK.
SKU: 50H-3 EMSCO#20810

50H-3 Federal Pioneer Air Breaker 2000A 600V MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, three pole, AC pro trip type T361-V2, manual operated, draw-out. Used electrically OK.
SKU: 50H-3 EMSCO#20811

50H-3 Federal Pioneer Air Breaker 2000A 600V MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, three pole. AC pro trip, type T361-V2, manually operated (120 volt AC), draw-out. Used electrically OK.
SKU: 50H-3 EMSCO#20804

50H-3 Federal Pioneer Air Breaker 2000A 600V MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, three pole. AC pro trip, type T361-V2, manual operated (120 volt AC), draw-out. Used electrically OK.
SKU: 50H-3 EMSCO#21046

50H-3 Federal Pioneer Air Breaker 2000A 600V MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, 800/1200/2000 amp CT, three pole. AC pro trip, manually operated, draw-out. Used electrically OK.
SKU: 50H-3 EMSCO#21396

50H-3 Federal Pioneer Air Breaker 2000A 600V MO/DO

Federal Pioneer 50H-3 Air circuit breaker; 2000 amp frame, 2000 amp trip, 600 volt, 800/1200/2000 amp CT, three pole. AC pro trip, manually operated, draw-out. Used electrically OK.
SKU: 50H-3 EMSCO#21441

50H-3 Federal Pioneer 2000A 600V Air Breaker MO/DO

Federal Pioneer 50H-3 Air Circuit Breaker; 2000 amp frame, 2000 amp trip, 600 volt, 800/1200/2000 amp CT, three pole, AC pro trip. manually operated, draw out. Used electrically OK.
SKU: 50H-3 EMSCO#21442

AK-T-2A-50 GE Air Breaker 2000A 600V MO/DO LSI

General Electric AK-T-2A-50 low voltage power circuit breaker; 2000 amp, 600 volt. Manually-operated, draw-out, EC-1 trip, LSI functions. Used E-OK.
SKU: AK-T-2A-50 #21820

AK-T-2A-50 GE 2000A Frame 600V EO/DO Air Breaker

General Electric AK-T-2A-50 low voltage power circuit breaker; 2000 amp frame, 600 volt. Manually operated, draw-out, over current tripping device. Sold used electrically OK.
SKU: AKT-2A-50 EMSCO #20820

DS420 SQUARE D AIR BREAKER 2000A FRAME/ 2000A SENSORS MO/DO LSIG

SQUARE D DS-420 low voltage AC power circuit breaker; 2000 amp frame, 2000 amp sensors. Manually operated, draw-out, Ampector 1-A model with LSIG functions * in a cell* Used electrically OK.
SKU: DS420 EMSCO #20853

DS-420 WESTINGHOUSE 2000A 635V RMS-500 MO/DO Air Breaker LSG

Westinghouse DS-420 low voltage AC power circuit breaker; type DS, 2000 amp frame, 635 volt max. RMS510 - TS5CLSG, 2000 amp rating plug - PD6D20A200 with LSG functions, manually operated, draw-out. Sold used as-is.
SKU: DS420 EMSCO# 20212

DSII-620 CH-W-Hse 2000A Frame 1600A Rating Plug MO/DO Air Breaker LSIG

Cutler-hammer/ Westinghouse DSII-620 low voltage AC power circuit breaker; 2000 amp frame, 2000 amp sensor, 600 volt, 1600 amp rating plug (RP6D20A160), digitrip optim 1050 trip unit (P106LSIG), with LSIG functions. Manually operated, draw-out. Sold used as is.
SKU: DSII-620 #19313

DSII-620 CH-W-Hse 2000A Frame No trip MO/DO Air Breaker

Cutler-Hammer/ Westinghouse DSII-620 low voltage AC power circuit breaker; 2000 amp frame * without trip unit *, 600 volt. Manually operated, draw-out. Sold used as is.
SKU: DSII-620 #19312

DSII-620 Cutler-Hammer Air Breaker 2000A 600V MO/DO LSIG

Cutler-Hammer DSII-620 low voltage AC power circuit breaker; 2000 amp, 600 volt. Manually operated, draw-out, digitrip Optim 1050 with LSIG functions. Used electrically OK.
SKU: DSII-620-MO-DO-LSIG-#22803

FP50 FPE 2000A 600V MO/ST w/ AC Pro Air Breaker

Federal Pacific FP-50 Low Voltage Power Circuit Breaker; 2000 amp frame, 600 volt. Manually operated, stationary "AC pro" trip unit. Used electrically OK.
SKU: FP50 EMSCO #20427

FP50 FPE 2000A 600V MO/ST Air Breaker LI

Federal Pacific FP-50 low voltage power circuit breaker; 2000 amp frame, 400-350-300-250 trip, 600 volt. Manually operated, stationary "LI" functions. Used electrically OK.
SKU: FP50 EMSCO #20426

Used and Refurbished Air Circuit Breakers

Air Circuit Breakers (ACB’s) use air to extinguish electrical sparks. When a fault occurs, these circuit breakers disrupt the circuit by releasing a burst of compressed air, extinguishing the arc. This isolates the defective section of the system, preventing damage. High-pressure air cools the electrical arc.

Inventory Selection of Air Circuit Breakers to Match and Replace Yours

Our inventory features a wide range of air circuit breaker types to match and replace your existing electrical equipment seamlessly, ensuring compatibility and optimal performance for different applications. Whether you need a specific voltage rating, current capacity, or unique design, we have options that suit your needs.

New and Refurbished Air Circuit Breakers -- It's Your Choice

We offer customers the flexibility to choose between new and refurbished ACB’s. New circuit breakers ensure the latest technology and warranties, while refurbished breakers provide cost-effective solutions without compromising quality, backed by thorough inspections and testing.

Electrical testing equipment Certifies Quality and Performance

Our products undergo rigorous electrical testing using the newest test equipment to guarantee quality, safety, and optimal performance. Each air circuit breaker is thoroughly inspected, ensuring it meets industry standards and specifications.

Specifications Based on Your Power Requirements

To specify the right air circuit breaker, consider power requirements such as voltage, current rating, breaking capacity, and the type of application. In most cases, air circuit breakers are used where there’s high risk of fire or explosion. Air Breakers are typically used for low voltages up to 15KV.

Our expert team can guide you through selecting the most suitable breaker for your specific power needs.

What Type of Air Circuit Breaker Do You Need?

Air Breaker Type

How the Breaker Type Works

Applications

Plain Break Air Breaker

Utilizes a pair of contacts within a chamber filled with air to interrupt the electrical circuit. When the contacts separate, an arc forms and is extinguished by the surrounding air.

Commonly used in low-voltage applications like residential and commercial settings, protecting against overcurrents and short circuits.

Magnetic Blowout Air Breaker

Uses a magnetic field to drive the arc away from the contacts, ensuring quick interruption and extinguishing of the arc. The magnetic force redirects the arc into a chute, effectively extinguishing it.

Often found in industrial and heavy-duty settings due to their capability to handle high fault currents, making them ideal for heavy machinery and large-scale equipment protection.

Air Chute Breaker

Uses a series of parallel plates to create a chute for the arc. When the contacts open, the arc is diverted into the chute, where it is elongated, cooled, and extinguished before being directed toward the exhaust vent.

Commonly applied in medium-voltage power distribution systems, particularly in substations, to protect transformers and other critical power equipment from faults and overloads.

Air Blast Breaker

Relies on a high-pressure air blast to extinguish the arc. The compressed air directed towards the arc causes rapid cooling and interruption, ensuring efficient breaking of the circuit.

Primarily utilized in high-voltage applications like power stations and critical infrastructure such as data centers and hospitals, offering reliable protection against high fault currents and maintaining system integrity.