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.

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 Allis-Chalmers MO/DO AIr Breaker

Allis-Chalmers LA-1600 Air Circuit Breaker; 1600 amp, 600 volt. Gold-Face, manually-operated/ draw-out, trip: RMS510 with L-S-I. Used electrically OK.
SKU: LA-1600 #20931

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

Siemens-Allis LA-1600 Type LA (BLUE) Low Voltage AC Power Circuit Breaker; 1600 amp frame, 600 volt. Static trip II trip unit with L.S.I. functions. Manually operated, draw-out, 1600 amp C.T.'s. Used Electrically OK.
SKU: LA-1600 EMSCO# 21306

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

Allis Chalmers LA-1600A Type LA (GOLD) Low Voltage Power Circuit Breaker; 1600 amp frame, 600 volt. Static-trip II with L.I. functions. Manually operated, draw-out, 1600 amp C.T.'s (NO LABEL). Used Electrically OK.
SKU: LA-1600A EMSCO# 21311

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

Allis-Chalmers LA-1600A Type LA (GOLD) Air Circuit Breaker; 1600 amp frame, 600 volt. Digi-trip RMS trip with L.S.I.G functions, 1200 amp rating plug. Manually operated, draw-out, trip - 120 V AC, 1600 amp C.T.'s (NO LABEL). Used Electrically OK.
SKU: LA-1600A EMSCO# 21310

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

Siemens-Allis LA-1600A Type LA (GOLD) Low Voltage AC Power Circuit Breaker; 1600 amp frame, 600 volt. Static trip II trip unit with L.S.I. functions. Manually operated, draw-out, trip - 120 V AC, 1600 amp C.T.'s. Used Electrically OK.
SKU: LA-1600A EMSCO# 21304

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

Siemens-Allis LA-1600A Type LA (GOLD) Low Voltage AC Power Circuit Breaker; 1600 amp frame, 600 volt. Static trip II trip unit with L.S.I. functions. Manually operated, draw-out, trip - 120 V AC, 1600 amp C.T.'s. Used Electrically OK.
SKU: LA-1600A EMSCO# 21305

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

Siemens-Allis LA-1600A Low Voltage AC Power Circuit Breaker; 1600 amp, 600 volt. Manually operated, draw-out, static trip II type TSG (3T) with LSG functions. Used electrically OK.
SKU: LA-1600A-MO-DO-LSG-#22371

LA-1600A Siemens-Allis Air Breaker 635V Max 1600A MO/DO

Siemens-Allis LA-1600A Low Voltage AC Power Circuit Breaker; 635 max volts, 1600 amps. Manually operated, draw-out, dual model A2 with trip I function. Used electrically OK.
SKU: LA-1600A Emsco#22700

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

Siemens-Allis LA-1600B Type LA (GOLD) Low Voltage AC Power Circuit Breaker; 1600 amp frame, 600 volt. Static trip II trip unit with L.I. functions. Manually operated, draw-out, 1600 amp C.T.'s. Used Electrically OK.
SKU: LA-1600B EMSCO# 21230

LA-3200A Allis-Chalmers 3200A 600V Gold Air Breaker EO/DO LI

Allis-Chalmers LA-3200A Type LA (Gold) Low Voltage AC Power Circuit Breaker; 3000 amp frame, 600 volt. Static trip II # TI(2T) with LI functions. Electrically operated, draw-out, 120 volt AC. Used Electrically OK.
SKU: LA-3200A EMSCO# 21759

LA-4000A Siemens-Allis Air Breaker 4000A 600V EO/DO LSIG

Siemens-Allis LA-4000A Low Voltage AC Power Circuit Breaker; 4000 amp, 600 volt. Electrically operated, draw-out, 120 VAC, Siemens static trip III with LSIG functions. Used electrically OK.
SKU: LA-4000A-EO-DO-LSIG-#22806

LA600 Allis-Chalmers 600A MO/DO Gold MO/DO Air Breaker LSI

Allis-Chalmers LA600 Air Circuit Breaker; 600 amp, 600 volt. GOLD-Face, manually-operated, draw-out, trip: RMS510 with L-S-I. Used Electrically OK.
SKU: LA600 #20933

LA600A Allis-Chalmers 600A MO/DO Air Breaker GOLD LSIG

Allis-Chalmers LA600A Air Circuit Breaker; 600 amp, 600 volt. GOLD-Face, manually-operated, draw-out, trip: Static Trip II with L-S-I-G. Used electrically OK.
SKU: LA600A #21429

LA-600AF Siemens-Allis 600A 600V Fused Air Breaker MO/DO LSG

Siemens-Allis LA-600AF (GOLD) Low Voltage Fused Power Circuit Breaker; 600 amp frame, 600 volt. Static Trip II trip unit with L.S.G. functions, manually operated, draw-out, 600 amp C.T.'s, 1200 amp fused. Used electrically OK.
SKU: LA-600AF EMSCO# 21228

LA-600B Siemens-Allis Air Breaker 600A 600V MO/DO LIG

Siemens-Allis LA-600B Low Voltage AC Power Circuit Breaker; 600 amp, 600 volt. Manually operated, draw-out, Static Trip II Type TIG (3T) with LIG functions. Used electrically OK.
SKU: LA-600B-MO-DO-LIG-#22370

LA-600F Siemens Allis 600A 600V Fused Air Breaker MO/DO LSG

Siemens-Allis LA-600F (BLUE) Air Circuit Breaker; 600 amp frame, 600 volt, Static Trip II with LSG function. Manually operated, draw-out, 1200 amp fused. Used electrically OK.
SKU: LA-600F EMSCO# 20859

LA-600F Siemens Allis 600A 600V Fused Air Breaker MO/DO LSG

Siemens-Allis LA-600F (BLUE) Air Circuit Breaker; 600 amp frame, 600 volt. Static Trip II with LSG function, manually operated, draw-out, 1200 amp fused. Used electrically OK.
SKU: LA-600F EMSCO# 20861

LA-600F Siemens Allis 600A 600V Fused Air Breaker MO/DO

Siemens-Allis LA-600F (BLUE) Air Circuit Breaker; 600 amp frame, 600 volt, Static Trip II Trip Unit with INST. Functions. Manually operated, draw-out, 600 amp C.T.'s, 1600 amp fused. Used Electrically OK.
SKU: LA-600F EMSCO# 21345

LA-600F Siemens Allis 600A 600V Fused Air Breaker MO/DO

Siemens-Allis LA-600F (BLUE) Air Circuit Breaker; 600 amp frame, 600 volt (No Trip Unit). Manually operated, draw-out, 350 amp C.T.'s, 1600 amp fused. Used Electrically OK.
SKU: LA-600F EMSCO# 21346

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.