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.

LK08 ABB 800A 600V EO/DO 120VAC LSI Air Circuit Breaker LSI

ABB ASEA LK08 Brown Boveri A.C. Low Voltage Power Circuit Breaker; 800 amp frame, 800 amp sensors, 600 volt AC. Electrically operated/ draw-out, charge: 120 VAC, close: 120 VAC, trip: 120 VAC, Micropower Shield Type MPS-5 with LSI functions. Used Electrically OK.
SKU: LK-08 # 20640

LK16 ITE/BBC 1600A 600V 120VAC EO/DO Power Circuit Breaker LSI

ITE/BBC LK16 Brown Boveri A.C. Low Voltage Power Circuit Breaker; 1600 amp frame, 1600 amp sensors, 600 volt AC. Electrically operated, draw-out, charge: 120 VAC, close: 120 VAC, trip: 120 VAC, Micro-power Shield Type MPS-5 with LSI functions. Used electrically OK.
SKU: LK-16 # 20637

LK16 ITE/BBC 1600A 600V MO/DO LSG Air Circuit Breaker

ITE/BBC LK16 Brown Boveri A.C. Low Voltage Power Circuit Breaker; 1600 amp frame, 1600 amp sensors, 600 volt AC. Manually operated, draw-out, Micro-power Shield Type MPS-4G with LSG functions. Used electrically OK.
SKU: LK-16 # 20900

LK20 ITE/BBC 2000A 600V EO/DO Air Breaker LS

ITE/BBC LK20 Low Voltage Power Circuit Breaker; 2000 amp rated, 2000 amp CT, 600 volt. Electrically operated, draw-out, 125 volt DC, control trip: MPS-4 with LS functions. Used Electrically OK.
SKU: LK20 #21397

LK20 ITE/BBC 2000A MO/DO Air Breaker LS

ITE/BBC LK20 low voltage power circuit breaker; 2000 amp frame, 2000 amp C.T. Manually operated, draw-out, 125 VDC trip, Micro-power shield type MPS 4 "LS" functions. Used electrically OK.
SKU: LK20 EMSCO #20888

LK20 ITE/BBC 2000A MO/DO Air Breaker LS

ITE/BBC LK20 Low Voltage Power Circuit Breaker; 2000 amp rated, 2000 amp CT, 600 volt. Manually operated, draw-out, trip: MPS-4 with LS functions. Used Electrically OK.
SKU: LK20 #21398

LK20 BBC 2000A 600V MO/DO Air Breaker

BBC LK20 Low Voltage Circuit Breaker; 2000 amp rated, no CT, 600 volt. Manually operated, draw-out, no trip unit. Used Electrically OK.
SKU: LK20 #21403

LK25 ITE/BBC 2500A 600V MO/DO Power Circuit Breaker LSG

ITE/BBC LK25 Brown Boveri A.C. low voltage power circuit breaker; 2500 amp frame, 2500 amp sensors, 600 volt AC. Manually operated, draw-out, solid state trip device #LSS4 with LSG functions. Sold used as is.
SKU: LK25 EMSCO #21393

LK25 ITE/BBC 2500A 600V MO/DO Power Circuit Breaker LSIG

ITE/BBC LK25 Brown Boveri A.C. low voltage power circuit breaker; 2500 amp frame, 2500 amp sensors, 600 volt AC. Manually operated, draw-out, solid state trip device #LSS4 with LSIG functions. Sold used as is.
SKU: LK25 EMSCO #20862

LK25 ITE/BBC 2500A 600V MO/DO Air Breaker LSG

ITE/BBC LK25 Low Voltage Power Circuit Breaker; 2500 amp, 600 volt. Manually operated, draw-out, trip: LSS4 with L-S-G. Used Electrically OK.
SKU: LK25 #20898

LK25 ITE/BBC 2500A 600V MO/DO Air Breaker LSG

ITE/BBC LK25 Low Voltage Power Circuit Breaker; 2500 amp, 600 volt. Manually operated, draw-out, trip: LSS4 with L-S-G. Used Electrically OK.
SKU: LK25 #20899

LK-25 BBC/ITE 2500A 600V AC Low Voltage Air Circuit Breaker MO/DO LSG

BBC/ITE LK-25 Brown Boveri AC Low Voltage Power Circuit Breaker; 2500 amp frame, 2500 amp sensors, 600 volt AC. Manually operated, draw-out, Solid State Trip Device Type LSS 4 with LSG functions. Sold Used As Is.
SKU: LK25 EMSCO #20674

LK42 ABB/BBC 4200A 600V EO/DO Air Circuit Breaker LSG

ABB/BBC LK42 Brown Boveri A.C. Low Voltage Power Circuit Breaker; 4200 amp frame, 4200 amp sensors, 600 volt AC. Electrically operated, draw-out, charge: 240 VAC, close: 240 VAC, trip: 240 VDC, Micro-power Shield Type MPS-4G with LSG functions. Used electrically OK.
SKU: LK-42 # 21379

LK42 ITE/BBC 4200A 600V MO/DO Air Circuit Breaker LS

ITE/BBC LK42 Brown Boveri A.C. Low Voltage Power Circuit Breaker; 4200 amp frame, 4200 amp sensors, 600 volt AC. Manual operated, draw-out, Trip Unit Type LSS-4 with LS functions. Used Electrically OK.
SKU: LK-42 # 21392

LKE16 ABB 1600A 600V MO/DO Air Circuit Breaker LSG

ABB LKE16 A.C. low voltage power circuit breaker; 1600 amp frame, 600 volt AC. Electrically operated, draw-out, 120 volt DC trip / close/ charge, micro-power shield type MPS 4G with LSG functions. Used electrically OK.
SKU: LKE-16 EMSCO #21382

LKE8 ITE/BBC 800A 600V MO/DO Air Circuit Breaker LIG

ITE/BBC LKE8 A.C. low voltage power circuit breaker; 800 amp frame. Manually operated, draw-out, micro-power shield type MPS 3G with LIG functions. Used electrically OK.
SKU: LKE8 EMSCO #20885

LKE8 ITE/BBC 800A 600V MO/DO Air Circuit Breaker LIG

ITE/BBC LKE8 A.C. low voltage power circuit breaker; 800 amp frame, 600 volt AC. Manually operated, draw-out, micro-power shield type MPS 3G with LIG functions. Used electrically OK.
SKU: LKE-8 EMSCO #21399

LKE8 BBC/ITE 800A 600V MO/DO Air Circuit Breaker LIG

BBC/ITE LKE8 A.C. low voltage power circuit breaker; 800 amp frame, 600 volt AC. Manually operated, draw-out, micro-power shield type MPS 3G with LIG functions. Used electrically OK.
SKU: LKE-8 EMSCO #21400

LKE8 BBC/ITE 800A 600V MO/DO Power Circuit Breaker LIG

BBC/ITE LKE8 A.C. low voltage power circuit breaker; 800 amp frame, 600 volt AC. Manually operated, draw-out, micro-power shield type MPS 3G with LIG functions. Used electrically OK.
SKU: LKE-8 EMSCO #21405

LKE8 BBC/ITE 800A 600V MO/DO Air Circuit Breaker LIG

BBC/ITE LKE8 A.C. low voltage power circuit breaker; 800 amp frame, 600 volt AC. Manually operated, draw-out, micro-power shield type MPS 3G with LIG functions. Used electrically OK.
SKU: LKE-8 EMSCO #21406

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.