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.

RL-800 Siemens-Allis 800A Frame 600V Air Breaker MO/DO LSIG

Siemens-Allis RL-800 Low Voltage AC Power Circuit Breaker; 800 amp frame, 600 volt. Static Trip II Type TSIG (3T) with LSIG functions. Manually operated, draw-out, 800/1 CT's. Used Electrically OK.
SKU: RL800 #20749

RLF800 Siemens 800A Frame/ 600A Rating Plug Fused Air Breaker EO/DO LSIG

Siemens - Allis RFL800 low voltage AC fused power circuit breaker; 800 amp frame, 600 amp rating plug (#PR6A08A060). Electrically operated, draw-out, motor volts: 120 VAC, close volts: 120 VAC, trip volts: 120 VAC. Digitrip RMS/R 800, trip unit #RH86CLSIG (LSIG functions), potential transformer module #PRTAPTM, type Q-11 auxiliary switch 400/800:5 amp C.T.'s. Used electrically OK.
SKU: RLF800 EMSCO #21255

RLF800 Siemens 800A Frame/600A Rating Plug Fused Air Breaker EO/DO LSIG

Siemens-Allis RLF800 AC fused low voltage AC power circuit breaker; 800 amp frame, 600 amp rating plug (#PR6A08A060). Electrically operated, draw-out, motor volts: 120 VAC, close volts: 120 VAC, trip volts: 120 VAC. Digitrip RMS/R 800 trip unit #RH86CLSIG (LSIG functions), potential transformer module #PRTAPTM, type Q-11 auxiliary switch 400/800:5 amp C.T.'s. Used electrically OK.
SKU: RLF800 EMSCO #21283

RLF800 Siemens-Allis 800A Frame/600A Rating Plug Fused Air Breaker EO/DO LSIG

Siemens-Allis RLF800 AC fused low voltage power circuit breaker; 800 amp frame, 600 amp rating plug (#PR6A08A060). Electrically operated, draw-out, motor volts: 120 VAC, close volts: 120 VAC, trip volts: 120 VAC. Digitrip RMS/R 800, trip unit #RH86CLSIG (LSIG functions), potential transformer module #PRTAPTM, type #Q-11 auxiliary switch 400/800:5 amp C.T.'s. Used electrically OK.
SKU: RLF800 EMSCO #21284

RLF-800 Siemens-Allis 800A 600V Fused Air Breaker EO/DO LSIG

Siemens-Allis RLF-800 Low Voltage AC Power Circuit Breaker; 800 amp frame, 600 volt. Digitrip RMS/R 800 #RH86CLSIG with LSIG functions, 600 amp rating plug #PR6A08A060. Electrically operated, draw-out, motor volts: 120 VAC, close volts: 120 VAC, trip volts: 120 VAC, type Q-11 auxiliary switch 400/800:5 amp CT's, 600 amp fuses. Used Electrically OK.
SKU: RLF800 #20534

RLF-800 Siemens-Allis 800A 600V Fused Air Circuit Breaker EO/DO LSIG

Allis Chalmers RLF-800 Fused Low Voltage AC Power Circuit Breaker; Rated Max. Volts: 600 rated, amps: 800, 600 amp fuses. Electrically operated, draw-out, 120 volt AC - Motor - Trip - Close Digi-Trip RMS/R 800, 600 amp rating plug - PR6A08A060 with LSIG functions. Used As-Is.
SKU: RLF800 #21218

RLF-800 Siemens-Allis 800A 600V Fused Air Circuit Breaker EO/DO LSIG

Siemens-Allis RLF-800 Fused Low Voltage AC Power Circuit Breaker; Rated Max. Volts: 600, rated amps: 800, 600 amp fuses. Electrically operated, draw-out, 120 volt AC - Motor - Trip - Close Digi-Trip RMS/R 800, 600 amp rating plug - PR6A08A060 with LSIG functions. Used As-Is.
SKU: RLF800 #21219

RLF-800 Siemens-Allis 800A 600V Fused Air Circuit Breaker EO/DO LSI

Siemens-Allis RLF-800 Fused Low Voltage AC Power Circuit Breaker; Rated Max. Volts: 600, rated amps: 800, 600 amp fuses. Electrically operated, draw-out, 120 volt AC - Motor - Trip - Close Type TSI(2T) Trip Unit, 600 amp rating plug - PR6A08A060 with LSI functions. Used As-Is.
SKU: RLF800 #21221

RLF-800 Siemens-Allis 800A 600V Fused Air Circuit Breaker EO/DO LSIG

Siemens-Allis RLF-800 Fused Low Voltage AC Power Circuit Breaker; Rated Max. Volts: 600, Rated Amps: 800, 600 amp fuses. Electrically operated, draw-out, 120 volt AC - Motor - Trip - Close Digi-Trip RMS/R 800, 600 amp rating plug - PR6A08A060 with LSIG functions. Used As-Is.
SKU: RLF800 #21224

RLF-800 Siemens-Allis 800A 600V Fused Air Circuit Breaker EO/DO LSIG

Siemens-Allis RLF-800 Fused Low Voltage AC Power Circuit Breaker; Rated Max. Volts: 600, Rated Amps: 800, 600 amp fuses. Electrically operated, draw-out, 120 volt AC - Motor - Trip - Close Digi-Trip RMS/R 800, 600 amp rating plug - PR6A08A060 with LSIG functions. Used As-Is.
SKU: RLF800 #21222

RLF-800 Siemens-Allis 800A 600V Fused Air Circuit Breaker EO/DO LSIG

Siemens Allis Chalmers RLF-800 Fused Low Voltage AC Power Circuit Breaker; Rated Max. Volts: 600, Rated Amps: 800, 600 amp fuses. Electrically operated, draw-out, 120 volt AC - Motor - Trip - Close Digi-Trip RMS/R 800, 600 amp rating plug - PR6A08A060 with LSIG functions. Used As-Is.
SKU: RLF800 #21223

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

Siemens-Allis RL-1600 Low Voltage AC Power Circuit Breaker; 1600 amp frame, 600 volt, 1600 amp current sensors, 1600 amp Grd. Sensors (when used). Static Trip II Type TSI(2T) with LSI functions. Manually operated, draw-out, type Q-11 auxiliary switch 1600:1 CT's. Used Electrically OK.
SKU: RL1600 EMSCO# 20577

RL-3200 Siemens-Allis 3200A 600V Air Breaker MO/DO LSIG

Siemens-Allis RL-3200 Type RL Low Voltage Power Circuit Breaker; 3200 amp frame, 600 volt. Static Trip II TYPE TSG (3T) LSIG functions. Manually operated, draw-out. 3200/1 CT's. Used Electrically OK.
SKU: RL3200 EMSCO# 20532

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

Siemens-Allis RL-1600 Type RL Low Voltage AC Power Circuit Breaker; 1600 amp frame, 600 volt, 1600 amp current sensors, 1600 amp Grd. Sensors (when used). Static Trip II Type TSI(2T) LSI functions. Manually operated, draw-out, Type Q-11 Auxiliary Switch 1600:1 CT's** Missing 1 set of spring stabs**. Used Electrically OK.
SKU: RL1600 EMSCO# 20578

RL-1600 Siemens-Allis 1600A 600V Air Breaker MO/DO LIG

Siemens-Allis RL-1600 Low Voltage AC Power Circuit Breaker; 1600 amp frame, 600 volt. Static Trip II Type TIG (3T) LIG functions. Manually operated, draw-out. Used Electrically OK.
SKU: RL-1600 EMSCO# 21344

RL-3200 Siemens-Allis 3200A EO/DO Air Breaker LSIG

Siemens-Allis Low Voltage AC Power Circuit Breaker RL-3200; 3200 amp, 600 volt. Electrically operated, draw-out. Gold Face TSG Trip: L-S-I-G. Used Electrically OK.
SKU: RL-3200 #20873

MA350C1 Siemens-Allis 5KV 1200A EO/DO Air Circuit Breaker

Siemens-Allis MA350C1 AC High Voltage Circuit Breaker; 1200 amp, 5 KV rated, 3 pole, control: 90 Volt - 130 Volt DC, Electrically operated, draw-out. Sold Used As Is.
SKU: MA350C1 - EMSCO # 19930

MA-350CA1 Siemens-Allis 5KV 2000A EO/DO Air Circuit Breaker

Siemens-Allis MA-350CA1 AC high voltage circuit breaker; 2000 amp, 5KV rated, close volt: 90-130 DC trip, volt: 70-140 DC, motor: 125 VDC, electrically operated, draw-out. Used as is.
SKU: MA350C1-EMSCO #19936

RLX-800 Siemens-Allis 800A 600V Air Breaker MO/DO LIG

Siemens-Allis type RLX low voltage AC power circuit breaker; RLX-800 800 amp frame, 600 volt static trip II, type TIG (3T), LIG functions, manually operated, draw-out, 800/1 CT's. Used electrically OK.
SKU: RLX-800 EMSCO# 21343

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.