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.

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#22915

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#22916

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#23067

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#23068

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#23069

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#23070

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#23071

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#23072

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#23073

DS-632 Square D Air Breaker 600V 3200A EO/DO LSI

Square D DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Digitrip RMS 510 with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#23074

DS632 Westinghouse 3200A Frame 3200A Rated 600V Air Breaker EO/DO LSI

Westinghouse DS-632 low voltage AC power circuit breaker; type DS cat# DS-632, 3200 amp frame, 600 volt, 3200 amp current sensors. Amptector I-A Model with LSI functions. Electrically operated/ draw-out, 120 volt AC - shunt trip, 120 volt AC - spring release, 120 volt AC - motor circuit. Sold used electrically OK.
SKU: DS-632 EMSCO# 20665

DS632 Westinghouse 3200A Frame 3200A Rated 600V Air Breaker EO/DO LSI

Westinghouse DS-632 low voltage AC power circuit breaker; type DS, 3200 amp frame, 600 volt, 3200 amp current sensors. Amptector I-A Model with LSI functions. Electrically operated, draw-out, 120 volt AC - shunt trip, 120 volt AC - spring release, 120 volt AC - motor circuit. Sold used electrically OK.
SKU: DS-632 EMSCO# 20666

DS-632 Westinghouse Air Breaker 3200A 600V EO/DO LSI

Westinghouse DS-632 low voltage AC power circuit breaker; 3200 amp, 600 volt. Electrically operated, draw-out, 120 VAC, Amptector I Model A with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-LSI-#22377

DS-632 Westinghouse Air Breaker 3200A 600V EO/DO LSI

Westinghouse DS-632 low voltage AC power circuit breaker; 3200 amp, 600 volt. Electrically operated, draw-out, 120 VAC, Amptector I Model A with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-LSI-#22378

DS-632 Westinghouse Air Breaker 600V 3200A EO/DO LSI

Westinghouse DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Amptector I A Model with LSI functions. Used electrically OK.
SKU: DS-632-EO-DO-#22981

DS-632 Westinghouse Air Breaker 600V 3200A EO/DO LSI

Westinghouse DS-632 low voltage AC power circuit breaker; 600 volt, 3200 amp. Electrically operated, draw-out, 120 VAC, Amptector I A Model with LSI functions ** Broken Secondary Disconnect** Used electrically OK.
SKU: DS-632-#22982

DS840 SQ-D 4000A 600V EO/DO Air Breaker LSI

Square D DS-840 low voltage AC power circuit breaker; 4000 amp, 600 volt. Electrically operated, draw-out, Amptector II with LSI functions. Used electrically OK.
SKU: DS840 #20256

DS-840 Square D 4000A Frame 4000A Sensors LSI EO/DO Air Breaker

Square D DS-840 low-voltage AC power circuit breaker; 4000 amp frame, 4000 amp sensors, 600 volt. Electrically operated, draw-out, 120 volt AC shunt trip, 120 volt AC close circuit, Amptector II-A Model TR with LSI functions. Used electrically OK.
SKU: DS840 EMSCO #20673

DS-840 Square D Air Breaker 600V 4000A EO/DO Used E-OK LSI

Square D DS-840 low voltage AC power circuit breaker; 600 volt, 4000 amp. Electrically operated, draw-out, Amptector II A Model TP with LSI functions. Used electrically OK.
SKU: DS-840-EO-DO-LSI-#22951

DS-840 Square D Air Breaker 600V 4000A EO/DO LSI

Square D DS-840 low voltage AC power circuit breaker; 600 volt, 4000 amp. Electrically operated, draw-out, 115 AC, Amptector I A Model with LSI functions. Used electrically OK.
SKU: DS-840-#22963

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.