Circuit breakers

103 companies | 567 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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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...

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 - 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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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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molded case circuit breaker - 16 - 1 600 A | DWA & DWB

The new line of WEG's modern circuit breakers features five new models. They operate from currents running from 10 to 1600A which handles most if not all...

air circuit breaker - max. 6 300 A | ABW

WEG Air Circuit Breaker ABW protects electrical circuits and related equipment so that they do not overload. It is very important to select the correct sized circuit breakers...

mini circuit breaker - 2 - 100 A | MDW & MDWH

MDW range of miniature circuit-breakers performs overload...

motor protection circuit breaker - MPW

The MPW motor-protective circuit-breakers are utilized to protect electric circuits, as well as to operate and protect motors up to 60cv (380V) or 75cv (440V). They have a high breaking capacity enabling them to be installed in applications...

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motor protection circuit breaker - MPW

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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live-tank circuit breaker / high-voltage - 72.5 - 550 kV

The XD|GE breaker, which is manufactured by GE Digital Energy, is a live tank circuit breaker that has...

dead-tank circuit breaker / high-voltage - 72.5 - 800 kV

Dead Tank Circuit Breakers are medium and high voltage machines that are constructed in robust structure to enable applications...

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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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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

Bulletin 140G Molded Case Circuit Breakers have eight different frame sizes with a...

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

Based on our experience with the S1, HGF and FXT types of circuit breakers, the improved GL300 series is safer and more reliable. It offers a new generation spring operating mechanism and tie rod that enable quick and easy onsite installation.

This range of live tank circuit breakers can be used everywhere...

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

The circuit breaker is key to substation safety and security. The high performance Alstom Grid Dead Tank circuit breaker, based on state of-the-art technology, has proven reliability. It requires almost no maintenance and is easy to install.

The SF6 Dead tank circuit breakers accommodate customer needs with high level...

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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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 to be electrical...

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

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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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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mini circuit breaker - 3 - 10 kA | 50 series

WERNERS 50 series miniature circuit breakers provide the customer a comprehensive efficient, reliable protection of equipments, cables and installations in buildings for over load and short circuit.

Ranging...

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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mini circuit breaker - 2 - 63 A, 230 - 400 V | S7 series

The Home-Miniature Circuit Breaker or S7 is specifically designed for circuit protection illumination, production and distribution for...

mini circuit breaker - 2 - 63 A, 230 - 400 V | CSB02 series

The CSB02 series by Bolevo is a miniature circuit breaker designed to be compatible with all kinds of circuit protection and distribution of power. It features...

mini circuit breaker - 2 - 63 A, 230 - 400 V | CSB01 series

The CSB01 miniature circuit breaker is utilized in providing circuit protection of illumination and distribution. It can also be used in...

mini circuit breaker - 1 - 63 A, 230 - 400 V | DZ47-63 series

The DZ47-63 is manufactured by Bolevo, and is a mini circuit breaker that is suitable to use on all kinds of circuit protection...

mini circuit breaker - 1 - 63 A, 230 - 400 V | M7/BCB01 series

The M7/BCB01 series of miniature circuit breakers is perfectly suitable for the protection of any circuit that conducts the illumination and distribution in industrial and...

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vacuum circuit breaker / medium-voltage - max. 12 kV | Calix series

The 12KV VCB (CALIX) is designed for rapid auto reclosing duty with SCADA compatible control system. With an optional features like draw-out type PT, Powerpack, and an Integral...

vacuum circuit breaker / outdoor - max. 36 kV, max. 2 000 A

The CG Porcelain Clad VCB is a vacuum circuit breaker that is specifically manufactured for use in outdoor applications. This breaker...

vacuum circuit breaker / outdoor - max. 36 kV | KIOSK

The KIOSK model engineered by CG Power Systems, is an outdoor vacuum circuit breaker that is specifically created for unmanned substations...

SF6 gas insulated circuit breaker / high-voltage / indoor - max. 36 kV

36 KV INDOOR SF6 GCB

Product Overview
The GCB is a high quality product which...

gas insulated circuit breaker / outdoor - 63 kV, max. 3 150 A

36 kV Outdoor GCB

Product Overview

The 36kV Outdoor GCB is specially developed and designed for rural and remote distribution networks. The product is developed to be a standalone and free standing device. The GCBs are of live tank design....

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power circuit breaker - CT 1000

With the CT contactor series from Schaltbau is an innovative contractor concept which is great for the electric arc control technologyin the market. Power contactors ,together with their style and design are completely new . It has been developed only for the purpose of attending...

vacuum circuit breaker / medium-voltage - CVB15

The CVB 15/08 series is a vacuum circuit breaker which is designed specifically to be considered as the main electrical switch and a device protecting the AC locomotives and its electrical multiple...

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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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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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