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.

AKR-5A-30 GE AIR BREAKER 800A FR/ 800A SENSOR EO/DO MVT TRIP

General Electric AKR-5A-30 low voltage power circuit breaker; 800 amp frame, 635 volt. Electrically operated, draw-out, electrical closing mechanism: 125 volt DC, Micro versa trip plus trip unit #AKR30C3F0802 (TR8B300- 300 amp rating plug), sensor (CT)= 800 amp. Used electrically OK.
SKU: AKR-5A-30 #21462

AKR-6D-30 GE Air Breaker 800A Frame 635V MO/DO LIG

General Electric AKR-6D-30 low voltage power circuit breaker; 800 amp frame, 635 volt AC. Manually operated, draw-out, 600 amp current sensor, Micro Versa-Trip #TA9VT20GA3, LIG functions with fault trip annunciator. Used electrically OK.
SKU: AKR-6D-30 EMSCO #22160

DS-416 Square D 1600A 635V MO/DO Air Breaker LSG

Square D DS-416 low voltage power circuit breaker; 1600 amp, 635 volts. Manually operated, draw-out with LSG functions. Used electrically OK.
SKU: DS-416 #22672

DS-416 WESTINGHOUSE 1600A 635V Air Circuit Breaker MO/DO LIG

Westinghouse DS-416 low voltage power circuit breaker; type DS, 1600 amp frame, 635 volt max. Manually operated, draw-out, Ampector model with LIG functions, no nameplate. Sold used as-is.
SKU: DS416 EMSCO# 21288

DS-420 WESTINGHOUSE 2000A 635V Air Circuit Breaker EO/DO LI

Westinghouse DS-420 low voltage AC power circuit breaker; type DS, 2000 amp frame, 635 volt max. Electrically operated, draw-out, 120 volt AC trip, 120 volt AC close, Ampector I with LI functions, 2000 amp CT. Sold used as-is.
SKU: DS420 EMSCO# 20276

DS632 SQUARE D 3200A 635V RMS500 AIR BREAKER EO/DO LS

SQUARE D DS-632 low voltage AC power circuit breaker; 3200 amp frame, 635 volt max. Electrically operated, draw-out, Digitrip RMS500 trip unit #T53CLS with LS functions, 3200 amp rating plug #PD6D32A320, 120 volt AC-shunt trip-spring release-motor circuit. Sold used as is.
SKU: DS632 EMSCO #20264

DS-632 WESTINGHOUSE 3200A 635V Air Circuit Breaker MO/DO LSIG

Westinghouse DS-632 low voltage AC power circuit breaker; type DS, 3200 amp frame, 635 volt max. Amptector I with LSIG functions, Manually operated, draw-out. Sold used as-is.
SKU: DS632 EMSCO# 20208

DS632 WESTINGHOUSE 3200A 635V LSG AIR BREAKER

Westinghouse DS-632 low voltage AC power circuit breaker; 3200 amp frame, 635 volt max, Ampector I-A with LSG functions, manually operated, draw-out. Sold used as is.
SKU: DS632 EMSCO#20265

DSII 632 SQUARE D 3200A 635V RMS610 AIR BREAKER EO/DO LS

Square D DSII-632 low voltage AC power circuit breaker; type DSII, 3200A frame, 635 volt max, 3200 amp rating plug: #RP6D32A320, RMS610 trip unit with LS functions (#S63LS). Electrically operated, draw-out, 120 volt AC- shunt trip- spring release-motor circuit. Sold used as is.
SKU: DSII632 EMSCO#20266

DS-II SQUARE D DSII-850 5000A 635V RMS-610 Air Circuit Breaker EO/DO LS

Square D DSII-850 low voltage AC power circuit breaker; type DS-II, 5000 amp frame, 635 volt max, 5000 amp rating plug: RP6D50A5000, RMS610 trip unit with LS functions (S63LS). Electrically operated, draw-out, 120 volt AC - shunt - motor - spring. Sold used as-is.
SKU: DSII850 EMSCO# 19963

DS-II SQUARE D DSII-850 5000A 635V RMS-610 Air Circuit Breaker EO/DO LS

Square D Low Voltage AC Power Circuit Breaker Type DS-II Cat# DSII-850; 5000 amp frame, 635 volt max, 5000 amp rating plug: RP6D50A5000 RMS610 Trip Unit w/ LS (S63LS) Electrically operated 120V AC - shunt - motor - spring, draw-out. Sold Used As-Is.
SKU: DSII850 EMSCO# 19964

DSII-616 Square D 1600A Frame 1600A Rating Plug 635V MO/DO Air Breaker LS

Square D DSII-616 low voltage AC power circuit breaker; type DS-II, 1600 amp frame, 635 volt max, 1600 amp, rating plug: RP6D16A160, RMS610 trip unit with LS functions (S63LS). Manually operated, draw-out. Sold used as is.
SKU: DSII-616 #19309

DSII-616 Square D 1600A Frame 1600A Rating Plug 635V MO/DO Air Breaker LS

Square D DSII-616 low voltage AC power circuit breaker; type DS-II, 1600 amp frame, 635 volt max, 1600 amp rating plug: RP6D16A160, RMS610 trip unit with LS functions (S63LS). Manually operated, draw-out. Sold used as is.
SKU: DSII-616 #19310

DSII-616 Square D 1600A Frame 1600A Rating Plug 635V MO/DO Air Breaker LS

Square D DSII-616 low voltage AC power circuit breaker; type DS-II, 1600 amp frame, 635 volt max, 1600 amp rating plug: RP6D16A160, RMS610 trip unit w/ LS (S63LS). Manually operated, draw-out. Sold used as is.
SKU: DS-II 616 #19311

DSII-616 Square D 1600A Frame 1600A Rating Plug 635V MO/DO Air Breaker LS

Square D DSII-616 low voltage AC power circuit breaker; type DS-II, 1600 amp frame, 635 volt max, 1600 amp rating plug: RP6D16A160, RMS610 trip unit with LS functions (S63LS). Manually operated, draw-out. Sold used as is.
SKU: DS-II 616 #20248

DSII-616 Square D 1600A Frame 1600A Rating Plug 635V MO/DO Air Breaker LS

Square D DSII-616 low voltage AC power circuit breaker; type DS-II, 1600 amp frame, 635 volt max, 1600 amp rating plug: RP6D16A160, RMS610 trip unit with LS functions (S63LS). Manually operated, draw-out. Sold used as is.
SKU: DS-II 616 #20249

DSII-616 Square D 1600A Frame 1600A Rating Plug 635V MO/DO Air Breaker LS

Square D DSII-616 low voltage AC power circuit breaker; type DS-II, 1600 amp frame, 635 volt max, 1600 amp rating plug: RP6D16A160, RMS610 trip unit with LS functions (S63LS). Manually operated, draw-out. Sold used as is.
SKU: DS-II 616 #20250

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.