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.

K-3000 ITE 3000A 600V Air Circuit Breaker EO/DO

ITE K-3000 Power Circuit Breaker; 3000 amp A.C. frame, 4000 amp D.C. frame. Red/Grey insulators, direct acting trip, type OD-300 non-adjustable trip device with LI functions, 3000 amp rated. Electrically operated, 120 volt, draw-out type. Sold Used Electrically OK.
SKU: K3000 EMSCO #21146

K-3000 ITE 3000A 600V Air Circuit Breaker EO/DO LS

ITE K-3000 Power Circuit Breaker; 3000 amp A.C. frame, 4000 amp D.C. frame. Red/Grey insulators, direct acting trip, type OD-400 with LS functions, 2500 amp rated. Electrically operated, 120 volt, draw-out type. Sold Used Electrically OK.
SKU: K3000 EMSCO #21148

K-3000 ITE 3000A 600V Air Circuit Breaker EO/DO LS

ITE K-3000 Power Circuit Breaker; 3000 amp frame, 50/60 Cy, 4000 amp frame DC. Red/Grey insulators, direct acting trip OD-400 with LS functions, 3000 amp rated. Electrically operated, 115 volt DC, draw-out type. Sold Used Electrically OK.
SKU: K3000S EMSCO#21553

K-3000 ITE 3000A 600V Air Circuit Breaker EO/DO LS

ITE K-3000 Power Circuit Breaker; 3000 amp frame, 50/60 Cy, 4000 amp frame DC. Red/Grey insulators, direct acting trip OD-400 with LS functions, 3000 amp rated. Electrically operated, 115 volt DC, draw-out type. Sold Used Electrically OK.
SKU: K3000S EMSCO#21554

K-3000 ITE Air Breaker 3000A 600V EO/DO LS

ITE K-3000 power circuit breaker; 3000 amp, 600 volt. Electrically operated, draw-out, 115 VAC, type OD-400 trip with LS functions. Used electrically OK.
SKU: K-3000-EO-DO-LS-#22784

K-3000S Gould/ ITE Air Breaker 3000A 600V EO/DO LS

Gould/ ITE K-3000S Power Circuit Breaker; 3000 amps, 600 volts. Electrically operated, draw-out, 115 volt DC-60, ITE SS4 trip with LS functions. Used electrically OK.
SKU: K-3000S-EO-DO-LI-#21925

LA-1600 Allis-Chalmers 1600A 600V Air Circuit Breaker MO/DO LS

Allis-Chalmers LA-1600 (Blue Face) Air Circuit Breaker; 1600 amp frame, 600 volt, static over-current trip device, model D2 with LS functions. Manually operated, draw-out, 800/0.5 C.T.'s. Used Electrically OK.
SKU: LA1600 EMSCO# 20602

LA-1600 Allis-Chalmers MO/DO Air Breaker LS

Allis-Chalmers LA-1600 Air Circuit Breaker; 1600 amp, 600 volt. Manually-operated, draw-out, TS trip: L-S, Gold Face. Used Electrically OK.
SKU: LA-1600 #20874

LA-1600 Siemens-Allis 1600A 600V Air Breaker MO/DO LI

Siemens-Allis LA-1600 Type LA Low Voltage AC Power Circuit Breaker; 1600 amp frame, Gold Face, 600 volt, 1600 amp current sensors. Static trip II type with LI functions, manually operated, draw-out. Used Electrically OK.
SKU: LA1600 EMSCO# 21877

LA-1600 Siemens-Allis 1600A 600V Air Breaker MO/DO LI

Siemens-Allis LA-1600 Type LA Low Voltage AC Power Circuit Breaker; 1600 amp frame, Gold Face, 600 volt, 1600 amp current sensors. Static trip II type with LI functions, manually operated, draw-out. Used Electrically OK.
SKU: LA1600 EMSCO# 21878

LA-4000 Allis-Chalmers 4000A 600V Air Circuit Breaker Blue EO/DO LS

Allis-Chalmers LA-4000 Type LA (Blue Face) Air Circuit Breaker; 4000 amp frame, 600 volt. Static trip II type TS with LS functions. Electrically operated, draw-out. Used Electrically OK.
SKU: LA4000 EMSCO# 20706

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

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

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.