Circuit breakers

105 companies | 579 products
Circuit breakers
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air circuit breaker - max. 1 600 A | Emax E1.2 series

The SACE Emax 2 is ABB'S innovative air circuit breakers that only utilizes...

air circuit breaker - max. 2 500 A | Emax E2.2 series

The SACE Emax 2 is ABB'S innovative air circuit breakers that only utilizes...

air circuit breaker - max. 4 000 A | Emax E4.2 series

With a 6,300-A voltage capability, ABB's SACE Emax 2 is a suitable and cost-efficient apparatus...

air circuit breaker - max. 6 300 A | Emax E6.2 series

The SACE Emax 2 is ABB'S innovative air circuit breakers that only utilizes...

air circuit breaker - max. 6 300 A, IP54 | Emax series

The same height and depth is found in all of the SACE Emax circuit-breakers in both the withdrawable and fixed version. The breakers enable the construction...

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motor protection circuit breaker - max. 100 kA, 400 V | PKE

Reliability and versatility that is what we look for most of the times. Well need not look further. The EATON Motor Protective Circuit Breaker PKE is truly a world...

motor protection circuit breaker - max. 50 kA, 400 V | PKZM0

The PKZM0 is a motor protective circuit breaker manufactured by Eaton. It can operate with the DIL contractor series, suitable for the configuration of motor-starter combinations.

The...

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motor protection circuit breaker - PKE

With more than 50 years of solid experience and knowledge in providing aerospace applications solutions, Crouzet Aerospace produces aerospace components that guarantee maximum performance and excellent quality. With a whole line of products perfect for aerospace applications, Crouzet Aerospace is also...

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thermal circuit breaker / rocker switch type - 0.05 - 20 A, 32 - 240 VAC | TA35

The TA35 Rocker 1Pole by Schurter is a single-poled highly configurable thermal circuit...

thermal circuit breaker / bipolar / rocker switch type - 0.05 - 20 A, 60 - 240 VAC | TA35

The aspect that makes the difference between this item and other similar products available on the market are...

thermal circuit breaker / single-pole - 3 - 16 A, 48 VDC - 240 VAC | T9 series

This product is definitely designed for standard and medical applications, power supplies, HVA, UPS, industrial, medical diagnostic and household appliances....

thermal circuit breaker / single-pole - 0.05 - 16 A, 48 VDC - 240 VAC | T11 series

T11 circuit breakers are one of the ranges of components manufactured for single pole push reset function feature. These circuit breakers are in-line small...

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air circuit breaker - 630 - 6 300 A | SENTRON 3WL

Air Circuit Breakers 3WL offer a flexible design which has integrated communications technology. The flexible design along with powerful technology...

molded case circuit breaker - 16 - 1 600 A | SENTRON 3VL

Presenting a top of the line compact design, the SENTRON 3VL molded-case circuit breakers meet all requirements placed upon space-saving electrical distribution systems...

mini circuit breaker - max. 10 000 A | 5SL

The innovative 5SL miniature circuit breaker has the same features and more as other Siemens MCBs and can be used up to 6kA. It has a striking design with color-coded, easy to recognize switching...

mini circuit breaker - 60 - 440 V | 5SY, 5SP

The 5SY and 5SP Miniature Circuit Breakers (MCB) are perfect for protecting plants in buildings or even in industrial applications because it functions as main switches for disconnection or isolation of plants....

mini circuit breaker - 10 - 20 A | 5SJ6…-.KS

These Miniature Circuit Breakers 5SJ6 are created with an integrated plug-in...

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generator circuit breaker - max. 63 kA, 24 kV | HVR-63 series

The HVR-63 GCB is a generator circuit-breaker manufactured by ABB. It is ideal for retrofitting or replacing power plants with unit power of up to 180 MW. It features an...

high-voltage circuit breaker - max. 63 kA, 420 - 550 kV | DCB

The Disconnecting Circuit Breaker (DCB) with Fiber Optic Current Sensor (FOCS) from ABB is suitable for use with IEC 61850-9-2LE process bus communication. The Fiber Optic Current Sensor changes the conventional...

live-tank circuit breaker / high-voltage - max. 31.5 kA, 72.5 - 84 kV | LTA

The LTA 72D1 is a live tank circuit breaker manufactured by ABB. It utilizes carbon dioxide as the insulation and arc extinguishing medium. This replaces...

live-tank circuit breaker / high-voltage - max. 31.5 kA, 36 - 72.5 kV | EDF SK

The ABB EDF SK Auto Puffer spring drive operating mechanism circuit breakers are designed for use outdoors. This high-performance...

live-tank circuit breaker / high-voltage - max. 31.5 kA, 36 - 72.5 kV | EDT SK

The combined apparatus of EDT SK relies on credible SF6 live tank breaker technology of ED type. Additionally, there is also one centralized compartment per pole having an internal...

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molded case circuit breaker - 10 - 3 000 A | 140G series

Bulletins 140G Molded Circumstance Signal Breakers have 8 different body sizing's having a selection...

circuit breaker - 0.5 - 63 A | 188-J series

The circuit breakers from Bulletin 188 are best to be used in extreme conditions...

DIN rail circuit breaker - 0.5 - 40 A, 240 V | 1489-A series

The Bulletin 1492-RCD Residual Current Devices are utilized to detect earth leakage. They can be used...

thermal magnetic circuit breaker - 0.5 - 63 A | 1489-M series

Bulletin 1489-M thermal-magnetic Circuit Breakers are approved for branch circuit protection in the United...

mini circuit breaker - 0.2 - 25 A | 1492-GH, 1492-GS

The High-Density Circuit Breakers from Rockwell Automation offer single-pole circuit breakers...

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mini circuit breaker - 0.2 - 25 A | 1492-GH, 1492-GS

Siemens has designed these high-quality and high-performance circuit breakers as a result of research and innovation that fits the present environmental and technological scenario....

live-tank circuit breaker / high-voltage - 75.5 - 1 425 kV | 3AP1, 3AP2

This circuit breaker has many special features including live-tank circuit breaking...

dead-tank circuit breaker / high-voltage - 38 - 245 kV | 3AP1

The exceptional features of the design of this dead-tank involves having a perceived quality of being created with...

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vacuum circuit breaker / medium-voltage - 12 - 40.5 kV, 1.25 - 2.5 kA | 3AF0

Our live-tank circuit breakers 3AF0 excel in their ability to reliably switch off overhead lines. The special technical features of live-tank design...

dead-tank circuit breaker / high-voltage - 15 - 38 kV, max. 1.2 - 3 A | SDV6

In 2006, Siemens introduced the new global class dead-tank SDV6 outdoor vacuum circuit breaker with the trustworthy Siemens 3AH3 vacuum circuit breaker. Designed specifically for the U.S. ANSI market, the stationary distribution vacuum circuit breaker has passed the entire ANSI type-testing...

live-tank circuit breaker / high-voltage - 27.5 kV, 2 A | 3AF04/3AF05

The 3AF04/3AF05 OVCBs for AC traction power supplies consist of three major parts: the pole assembly, the operating mechanism box, and the supporting steel structure. For easy access, the operating mechanism box is situated inside the supporting steel frame. It features the circuit-breaker...

vacuum circuit breaker / medium-voltage / indoor - 7.2 - 24 kV, 0.8 - 3.15 kA | SION series

The newest vacuum circuit breaker generation of Siemens (called SION) was successfully introduced in January 2006. Since this time the SION VCB family has been developed as the global platform for all kinds of applications in medium voltage.
All newly...

vacuum circuit breaker / medium-voltage / indoor - 7.2 - 40.5 kV, 1.25 - 6.3 kA | 3AH3

Circuit breakers must make and break all currents within the...

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DIN rail circuit breaker - 0.5 - 40 A, 240 V | 1489

In purchasing equipments reliability is of utmost importance. Bulletin 1489 Industrial...

thermal circuit breaker / single-pole / mini - 0.2 - 25 A, 65 - 250 V | 1492-GH

You are looking at one of the most advanced miniature circuit breakers available on the market, for which...

thermal magnetic circuit breaker - 10 - 100 A | 1492-MC

Rockwell Automation Bulletin 1492-MC Thermal Magnetic Circuit Breakers are used for giving precise...

motor protection circuit breaker - 0.1 - 630 A | 140M

Presenting a top of the line new product. Bulletin 140M Motor Protection Circuit Breakers are...

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low-voltage circuit breaker - AR-series

AR-series power circuit breaker replacements are designed to be...

vacuum circuit breaker / medium-voltage - VR series

The VR-Series vacuum breaker replacements are designed with similar functions...

hydraulic-magnetic circuit breaker - 1U series

Eaton 1U Series Slimline hydraulic magnetic breaker gives improved reliability, safety and performance by using a patented snap action...

hydraulic-magnetic circuit breaker - 1 000 V | AM1P series

With the help or parallel wiring configuration, the AM1P facilitates 200 amperes in a 2-pole design...

hydraulic-magnetic circuit breaker - C series

Popular in outdoor locations, the C Series is ideal for use in either low or high temperature environments where...

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modular circuit breaker - 1 - 63 A

An exciting new circuit breakers were released and these circuit breakers are in Compliance with standards IEC EN 60898 or IEC 60947-2 (depending on...

mini circuit breaker - 10 - 125 A

Schneider Electric C120 modular circuit-breakers can handle nominal current ranging from 10 to 125 A and offer a range of breaking capacity and...

high-performance circuit breaker / mini - 10 - 125 A | NG125

This high-end device has a nominal current of 10 to 125A. Its operating voltage is up to 500 Vac with an insulation voltage...

high-performance circuit breaker / modular - 16 - 160 A | NG160

This unit has a rated current of 16 to 160A, rated operational voltage of 500V AC, and three possible breaking performances at 16, 25 and 35kA, and under...

mini circuit breaker - 0.5 - 63 A | C60 UL/CSA/IEC

C60 UL/CSA/IEC is one of the top circuit breakers in North American standards. This highly capable device has a rating current of 0.5 to 63A....

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live-tank circuit breaker / high-voltage - max. 800 kV | GL series

According to our own exposure to the S1, HGF as well as FXT kinds of circuit breakers, the actual enhanced GL300 series is actually less dangerous and much more dependable. It provides a brand new technology spring functioning system as well as connecting rod which allow fast and simple...

dead-tank circuit breaker / high-voltage - max. 550 kV | DT series

The actual circuit breaker is essential toward substation protection along with safety. The actual great efficiency Alstom Grid Dead Tank circuit breaker, designed with innovative engineering, has shown trustworthiness. It takes hardly any upkeep and is also very easy to set up. The particular SF6 Dead...

generator circuit breaker - max. 28 000 A, 1 000 MW | FKG series

Whether for installations in new power plants or for refurbishment of existing ones, by using our cutting edge technology in the field of spring operating mechanisms, ALSTOM Grid offers you the perfect Generator Circuit Breaker solution for your specific needs up to 28,000 A.

The FKG1 and FKG2 Circuit breakers provide you with the perfect solution for your specific...

generator circuit breaker - FKG series

A new GCB with the latest technology does not need maintenance during the first 5 years and offers a warranty period. Unlike an old GCG that requires...

generator circuit breaker - max. 36 kV, 275 kA | PKG series

This PKG circuit breaker and load break switch are used to make power plants at 2000 MW in size easier to...

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vacuum circuit breaker / high-voltage / AC / outdoor - 12 kV, 50 Hz | ZW32-12

ZW32 outdoor High Voltage AC Vacuum circuit Breaker is a new...

vacuum circuit breaker / high-voltage / AC / indoor - ZN63S-24(VSI+)

VSm-24 indoor AC high voltage vacuum circuit breaker, equipped with permanent magnet mechanism,...

vacuum circuit breaker / AC / high-voltage / indoor - 50 Hz, 12 kV | ZN63S-12(VS1)

ZN63S-12(VSI+) indoor high voltage AC vacuum circuit...

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motor protection circuit breaker - 32 A

The 45mm wide MS32 motor protection switches are ideal for electric motor startup and protection. They have uses in industry, agricultural machines, repair shops, compressors,...

motor protection circuit breaker - 25 A

MS25 are switches specifically devised for the protection of motors. They are used in electric motors to protect/start-up motors of compressors, agricultural...

motor protection circuit breaker - 25 A

The Miniature Circuit Breakers RI 60 feature special rings that are accessible for fixing miniature cicruit breakers with two M5 screws. The handle can also be sealed...

mini circuit breaker - 32 A | RI 20

The Miniature Circuit Breakers RI 20 are created for overcurrent protection of...

mini circuit breaker - RI 50

The RI 50 by Iskra Sistemi are miniature circuit breakers specifically designed for protection from overcurrent such as overload and short circuit...

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mini circuit breaker - 3 - 10 kA | 50 series

WERNERS 50 series mini circuit rollers offer an extensive,productive and dependable safety of tools,cables and setups in construction for excess load and short-circuit.

This series consists...

molded case circuit breaker - 25 - 70 kA | 51 series

Werner MCCB 51 Series circuit breakers contains a modular and solid design that consumes little space. This economically efficient device utilizes a unique technology in...

motor protection circuit breaker - max. 63 A | 55 series

WERNERS 55 motor protection circuit breakers are designed for comprehensive overload, as well as to protect against short circuits. They have often been regarded as the best in the supervision of motors, which is...

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hydraulic-magnetic circuit breaker - 0.02 - 50 A, 80 - 277 V | A series

The A-Series hydraulic/magnetic circuit breakers are compact and temperature stable designed for precision operation in OEM markets requiring general purpose as well as full load amp applications. These circuit...

hydraulic-magnetic circuit breaker - 0.02 - 50 A, 80 - 277 V | B series

The B-Series hydraulic/magnetic circuit breakers are compact and temperature stable designed for precision operation in OEM markets requiring general purpose...

hydraulic-magnetic circuit breaker / remotely operated - 0.02 - 100 A, 65 - 277 V | C series

The C-Series remote operated circuit breaker consists of a custom designed remote operated motor module (housed within a circuit breaker molding) coupled to a C-Series hydraulic/magnetic circuit breaker. The remote operated circuit...

hydraulic-magnetic circuit breaker - 0.02 - 100 A, 65 - 277 V | C series

The C-Series hydraulic/magnetic circuit breakers are designed for those applications requiring higher amperage and voltage handling capability in a smaller package. Available with American Standard or Metric Threaded Stud terminals, or Saddle Clamp screw terminals. Optional mid-trip handle style actuator...

hydraulic-magnetic circuit breaker / DIN rail - 1 - 125 A, 250 - 600 V | CX series

The CX-Series hydraulic/magnetic circuit breaker features a unique and innovative patent pending arc quenching configuration that allows it to safely handle high amperage and high DC voltage applications in a compact package. By using a patent pending magnetic flux boosting terminal configuration, a strong magnetic field is created thus motivating the arc into an enhanced...

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mini circuit breaker - 6 - 63 A | MCB series

The specialty of MCB-T or MCB-P lies in the combination of the functions of a contractor and that of a circuit breaker of the same element. MCBs generally have two options:


Closed circuit-breaker:...

earth-leakage circuit breaker - RECmaxLPD series

The RECmaxLPD Series is an automatic device that has an earth leakage circuit that measures leakage currents. This is usually used in electrical, single-phase and three-phase installations...

motorized circuit breaker - RECmaxMP series

Circutor's RECmaxMP are the motorized circuit breakers which can be connected remotely. They serve as a security against short circuit...

motorized circuit breaker - 80 - 250 A | MT-FDE series

The MT-FDE Series is a motor-driven circuit breaker designed to provide resistance against short circuits and overloads....

motorized circuit breaker - max. 63 A | MT series

The MT series motorized circuit breaker functions through securing a specified system from...

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circuit breaker with Type-2 surge arrester - 25 - 63 A, 15 - 40 kA | V-CHECK MPT

The V - CHECK MPT is a series of of combined transientand power frequency overvoltage safety devices ( SPD + POP). The V - CHECK MPT is a condensed wired device with a MCB circuit breaker. The device is a Type 2 / Category II, having 15 KA...

circuit breaker with Type-2 surge arrester - 10 - 63 A, 230 V

THE CPT CIRPROTEC V-CHECK MPT mini overvoltage protection devices belong to the range of combined transient and power frequency overvoltage product series, and are very compact,...

circuit breaker with Type-2 surge arrester - 6 - 63 A, 15 - 20 kA | V-CHECK MR

The V-CHECK MR is a Consolidated transient and power frequency overvoltage security devices (Spd+pop), complete with programmed reclosure (mechanized MCB included), Type 2/ Class II, 15...

earth-leakage circuit breaker / programmable - 6 - 63 A | Overcheck

The overcheck is a coverage of programmable, motorized tools, compromises a monitoring unit and a circuit breaker. It disconnects the supply when voltage values, current or earth leakage...

earth-leakage circuit breaker / programmable - Overcheck MT

The Overcheck MT is an adjusting and motorizing device that consists of a circuit breaker and monitoring unit. The circuit breaker disconnects the supply when there is an excess...

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How to choose this product

circuit-breaker

A circuit breaker is an electrical protection device that cuts power to an electrical cable in case of overvoltage, short circuit or if the circuit presents an isolation defect.

Applications

Circuit breakers are used in industrial facilities to protect circuits and electrical machinery.

Technologies

Thermal circuit-breakers use a bimetallic strip that expands and opens the circuit in the presence of excessive currents. It protects conductors from prolonged over amperage and fire-risks. Magnetic circuit-breakers use a coil, as in relays. They can open the circuit immediately or after pre-set delays (e.g. for motor-starting). Thermal magnetic circuit-breakers combine these two systems. High-end electronic circuit-breakers can be adjusted for extremely precise activation.

Differential circuit-breakers protect against ground leakage. In case of isolation defects, the sum of the phase currents is not equal to the current circulating in the neutral. A magnetic circuit uses this difference to trigger the device. Circuit-breakers interrupt power to electrical supply lines. High-voltage circuit-breakers use gas, oil or compressed air to increase their ability to cut power and extinguish electrical arcs.

How to choose

The main parameters are the rated current (In), well under the trip level (Icu or Icn), beyond which the circuit's integrity is at risk, and the device's class.

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