Circuit breakers

Do you need help making a decision?  Take a look at our buying guide
129 companies | 686 products
exhibit your products

& reach your clients in one place, all year round

Exhibit with us
Search
Circuit breakers | Choosing the Right Circuit Breaker
A circuit breaker is an essential safety device for any piece of equipment or network through which an electric current flows. Quite simply it will, as the name indicates, break the circuit and stop the current flowing if it detects any dangerous anomalous current, voltage, or temperature levels in the circuit. Generally, in an industrial context, electricity passes through a circuit-breaker box where it is divided into several circuits. Each of these circuits...
{{#pushedProductsPlacement4.length}} {{#each pushedProductsPlacement4}}
{{product.productLabel}}

{{product.productLabel}} {{product.model}}

{{#if product.featureValues}}
{{#each product.featureValues}} {{content}} {{/each}}
{{/if}}
{{#if product.productPrice }} {{#if product.productPrice.price }}

{{product.productPrice.formattedPrice}} {{#if product.productPrice.priceType === "PRICE_RANGE" }} - {{product.productPrice.formattedPriceMax}} {{/if}}
{{/if}} {{/if}}
{{#if product.activeRequestButton}}
{{/if}}
{{product.productLabel}}
{{product.model}}

{{#each product.specData:i}} {{name}}: {{value}} {{#i!=(product.specData.length-1)}}
{{/end}} {{/each}}

{{{product.idpText}}}

{{productPushLabel}}
{{#if product.newProduct}}
{{/if}} {{#if product.hasVideo}}
{{/if}} {{#each product.productTagAssociationList}}
{{/each}}
{{/each}} {{/pushedProductsPlacement4.length}}
{{#pushedProductsPlacement5.length}} {{#each pushedProductsPlacement5}}
{{product.productLabel}}

{{product.productLabel}} {{product.model}}

{{#if product.featureValues}}
{{#each product.featureValues}} {{content}} {{/each}}
{{/if}}
{{#if product.productPrice }} {{#if product.productPrice.price }}

{{product.productPrice.formattedPrice}} {{#if product.productPrice.priceType === "PRICE_RANGE" }} - {{product.productPrice.formattedPriceMax}} {{/if}}
{{/if}} {{/if}}
{{#if product.activeRequestButton}}
{{/if}}
{{product.productLabel}}
{{product.model}}

{{#each product.specData:i}} {{name}}: {{value}} {{#i!=(product.specData.length-1)}}
{{/end}} {{/each}}

{{{product.idpText}}}

{{productPushLabel}}
{{#if product.newProduct}}
{{/if}} {{#if product.hasVideo}}
{{/if}} {{#each product.productTagAssociationList}}
{{/each}}
{{/each}} {{/pushedProductsPlacement5.length}}
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
1489-M series

Primary current: 0.5 A - 63 A
VAC: 480, 230, 400 V
VDC: 48, 96 V

... Bulletin 1489-M Thermal-magnetic Circuit Breakers are UL 489 Listed for branch circuit protection in the United States and Canada, and they are certified as Miniature Circuit ...

See the other products
Allen-Bradley
motor protection circuit breaker
motor protection circuit breaker
PKE series

Primary current: 32 A - 65 A
VAC: 400 V

PKE motor-protective circuit-breakers with electronic wide-range overload protection offer an interesting alternative to the bimetal solution for motor currents up to 65 A. PKE motor-protective circuit-breakers ...

See the other products
Eaton
magnetic circuit breaker
magnetic circuit breaker
MS132-32

Primary current: 32 A
VAC: 600 V
VDC: 400 V

... protect them reliably and without the need for a fuse from short-circuits, overload and phase failures. The manual motor starter offers a rated service short-circuit breaking capacity Ics ...

See the other products
ABB
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
TeSys GV2

Primary current: 138 A
VAC: 0 V - 690 V
Rating: 10 A

TeSys GV motor circuit breaker, 3 poles (3P), 10A/690V, for 3-phase motor applications 3-4kW@400V. It provides a thermal-magnetic protection with a thermal setting range 6-10A, magnetic tripping at 13xIn, ...

single-pole circuit breaker
single-pole circuit breaker
MS3320 series

Primary current: 0.5 A - 30 A

Electromechanical Circuit Breakers (CB) with several different terminals (FASTON, EN, MIL...) and accessories.

See the other products
Crouzet
digital circuit breaker
digital circuit breaker
MasterPact MTZ

Primary current: 630 A - 6,300 A
VAC: 220, 415 V
Rating: 800 A - 1,000 A

Future Ready ! MasterPact MTZ is a comprehensive range of air circuit breakers, to protect from damage caused by overloads, short-circuits or insulation faults. MasterPact MTZ embeds ...

See the other products
Schneider Electric
voltage circuit breaker
voltage circuit breaker
SB6100 series

Primary current: 10 mA - 100 mA
VAC: 600 V

Special-Purpose Ground-Fault Circuit Interrupter (GFCI), Class C and Class D Industrial Shock Block (ISB) is a personnel protection device designed to meet the requirements for special-purpose GFCIs defined by UL 943C. ...

thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
1489 series

Primary current: 0.5 A - 63 A
VAC: 277, 480, 240 V
VDC: 96, 48 V

... Bulletin 1489-M Thermal-magnetic Circuit Breakers are UL 489 Listed for branch circuit protection in the United States and Canada, and they are certified as Miniature Circuit ...

See the other products
Allen Bradley
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
PR series

Primary current: 80 A - 125 A
VAC: 230 V - 400 V

Circuit breakers PR121 - PR122 - PR123 - PR124 series 1- to 4-pole circuit breakers, from 80 to 125 A. B and C curves.

thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
RECmaxMP series

VAC: 240, 415 V
Rating: 6 A - 63 A

... RECmax MP series are motorized circuit breakers that can be linked remotely.They function as protection against shortcircuit and overload, and can also be used as a circuit breaker. ...

differential circuit breaker
differential circuit breaker
RECmaxLPD series

Primary current: 6 A - 63 A
VAC: 240, 415 V

... device with circuit breaker and ultra-immunized earth leakage protection. Programmable unit with display, which measures leakage currents (earth leakage protection), and orders the disconnection or ...

overload circuit breaker
overload circuit breaker
MT series

Primary current: 6 A - 63 A
VAC: 240, 415 V

The motorized circuit breakers of the MT Series can be associated remotely. They protect against short-circuits and overloads, but are also used as a circuit breaker. ...

magnetic circuit breaker
magnetic circuit breaker
SNAPAK® series

VAC: 30 V
VDC: 30 V
Rating: 0.1 A - 30 A

... contacts and minimizes arcing. SNAPAK® circuit protectors are UL Recognized as supplementary protectors per UL STD. 1077, CSA Certified as supplementary protectors per CSA STD. C22.2 No. 235, TUV Approved as circuit ...

See the other products
Sensata Technologies
hydraulic-magnetic circuit breaker
hydraulic-magnetic circuit breaker
209 series

Primary current: 0.1 A - 100 A
VAC: 480, 240, 277 V
VDC: 125, 160 V

The 209, E-Frame circuit breaker combines power switching with accurate, reliable circuit protection in a compact single or multi-pole unit. The unit is ideal for branch circuit ...

See the other products
Sensata Technologies
hydraulic-magnetic circuit breaker
hydraulic-magnetic circuit breaker
LEJ series

Primary current: 2 A - 20 A
VAC: 240, 277 V

The LEJ/LEJA series circuit breaker meets the evolving demand for the high-performance protection of critical data center and telecommunications applications requiring up to 277VAC per pole, UL 489 listing ...

See the other products
Sensata Technologies
air-operated circuit breaker
air-operated circuit breaker
DZ47

Primary current: 1 A - 63 A
VAC: 230, 400, 415 V
VDC: 10 V - 10 V

... Miniature Circuit Breaker is an AC MCB circuit breaker series. It is used in lighting distribution systems or motor distribution systems for protecting against overload ...

solid-state circuit breaker
solid-state circuit breaker
Power Rider 25A

Primary current: 0 A - 25 A
VDC: 9 V - 55 V

The Power Rider 25A is an advanced electronic (solid state) circuit breaker designed to protect and manage power systems efficiently. It provides precise control with three layers of protection, real-time ...

See the other products
Redler Technologies LTD
high-voltage circuit breaker
high-voltage circuit breaker
Power Rider HV 25A

Primary current: 0 A - 25 A
VDC: 120 V - 350 V

... electronic circuit breaker designed to handle DC systems up to 350V. With advanced protections, real-time monitoring, and configurable logic, it is ideal for demanding power-critical applications. Built ...

See the other products
Redler Technologies LTD
solid-state circuit breaker
solid-state circuit breaker
Power Rider 80A

Primary current: 0 A - 80 A
VDC: 9 V - 55 V

The Power Rider 80A is a smart electronic circuit breaker designed to protect and manage power systems with precision and reliability. Combining the functions of a circuit breaker, ...

See the other products
Redler Technologies LTD
low-voltage circuit breaker
low-voltage circuit breaker
TANM series

TANM1/TANM2 series moulded case circuit breaker (hereinafter referred to as circuit breaker) is suitable in a circuit with AC 50Hz (or 60Hz), rated operating ...

See the other products
Ningbo Tianan (Group) CO.,Ltd.
vacuum circuit breaker
vacuum circuit breaker
TANK1

... the protection of power lines and equipment. The circuit breaker contacts maintenance, overload capability, and strong interrupter breaking ability, can achieve true zero arcing. The circuit ...

See the other products
Ningbo Tianan (Group) CO.,Ltd.
low-voltage circuit breaker
low-voltage circuit breaker
TANW1

TANW1 intelligent universal low-voltage circuit breaker Category:Components

See the other products
Ningbo Tianan (Group) CO.,Ltd.
MCB circuit breaker
MCB circuit breaker
BRSCB-I-25

Primary current: 25,000, 50,000, 100,000 A
VAC: 500 V

MCB specially designed for Surge Arrester. It can cut the leakage current to 3A The color of the visual alarm window indicates the working status of the protection, green (normal) and red (fault). Flame-retardant housing design for ...

See the other products
Britec Electric Co., Ltd
MCB circuit breaker
MCB circuit breaker
BRSCB-I-12.5 series

Primary current: 12,500, 25,000, 60,000 A
VAC: 500 V

MCB specially designed for Surge Arrester. It can cut the leakage current to 3A The color of the visual alarm window indicates the working status of the protection, green (normal) and red (fault). Flame-retardant housing design for ...

See the other products
Britec Electric Co., Ltd
thermal circuit breaker
thermal circuit breaker
BRSCB-80 series

Primary current: 40,000, 80,000 A
VAC: 500 V

MCB specially designed for Surge Arrester. It can cut the leakage current to 3A The color of the visual alarm window indicates the working status of the protection, green (normal) and red (fault). Flame-retardant housing design for ...

See the other products
Britec Electric Co., Ltd
hydraulic-magnetic circuit breaker
hydraulic-magnetic circuit breaker
B1 series

Primary current: 1 A - 40 A
VAC: 250 V
VDC: 80 V

BSB B1 Series Hydraulic-magnetic Circuit Breakers are compact and durable, ideal for applications with limited space. They offer various handles and can be used in telecommunications, lighting, railway ...

See the other products
ZHEJIANG BSB ELECTRICAL APPLIANCES CO.,LTD
hydraulic-magnetic circuit breaker
hydraulic-magnetic circuit breaker
B2 series

Primary current: 1 A - 63 A
VAC: 415, 250, 127 V
VDC: 65, 80 V

... series hydraulic-magnetic circuit breaker is a front-mounted circuit breaker. It has up to four poles and can be used for both AC and DC applications. It is a modular ...

See the other products
ZHEJIANG BSB ELECTRICAL APPLIANCES CO.,LTD
hydraulic-magnetic circuit breaker
hydraulic-magnetic circuit breaker
B3 series

Primary current: 1 A - 63 A
VAC: 240, 250, 415, 120 V

The BSB B3 series hydraulic-magnetic circuit breaker is a compact yet powerful circuit breaker. Its hydraulic magnetic technology is unaffected by environmental temperatures, ...

See the other products
ZHEJIANG BSB ELECTRICAL APPLIANCES CO.,LTD
differential circuit breaker
differential circuit breaker
DFS 4 025-2/0,03-EV

Primary current: 25 A
VAC: 230 V

Residual current circuit-breakers (RCCBs) are components for implementing protective measure "Automatic switch-off of power supply" as per VDE 0100 part 410 or corresponding international installation ...

See the other products
Doepke Schaltgeräte GmbH
miniature circuit breaker
miniature circuit breaker
B4C1N01A

Primary current: 45,000 A
VAC: 230, 415 V
VDC: 60 V

... miniature circuit breakers have been designed for protection of electrical installations against overload and short circuits and are manufactured in accordance with IEC 60898-1 Technical ...

See the other products
IMO Precision Controls Limited
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
B10B1010A

Primary current: 10,000 A
VAC: 415, 230 V
VDC: 60 V

... miniature circuit breakers have been designed for protection of electrical installations against overload and short circuits and are manufactured in accordance with IEC 60898-1 Technical ...

See the other products
IMO Precision Controls Limited
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
B10C2040A

Primary current: 10,000 A
VAC: 415, 230 V
VDC: 60 V

... miniature circuit breakers have been designed for protection of electrical installations against overload and short circuits and are manufactured in accordance with IEC 60898-1 Technical ...

See the other products
IMO Precision Controls Limited
vacuum circuit breaker
vacuum circuit breaker
ZW32-12/24

Primary current: 1,250, 630 A
VAC: 12, 24, 36 kV

... Good pollution resistance. Description: ZW32-12/24 model outdoor AC vacuum circuit breaker is used to make and break load current, overload current and short-circuit current in ...

See the other products
zhejiang Pomanique Electric Co.,Ltd
vacuum circuit breaker
vacuum circuit breaker
ZW7

Primary current: 1,250, 1,600, 2,000 A
VAC: 36 kV

... outdoor high-voltage vacuum circuit breaker is a kind of outdoor high-voltage switchgear under three-phase AC 50Hz, 36kv rated voltage and below. It can be used to switch on and off the loading, overloading ...

See the other products
zhejiang Pomanique Electric Co.,Ltd
vacuum circuit breaker
vacuum circuit breaker
ZN85-40.S/T

Primary current: 1,250, 1,600, 2,000, 2,500 A
VAC: 40.5 kV

... voltage indoor vacuum circuit-breaker is used for switchgear KYN61-40.5(Z), it is most new type of power supply and distribution equipment. This product is accordance with GB1984-2003 stand. This series include: Vacuum ...

See the other products
zhejiang Pomanique Electric Co.,Ltd
vacuum circuit breaker
vacuum circuit breaker
V12-630-20 KUF

Primary current: 630 A
VAC: 12 kV

The switches are designed for normal operating conditions acc. to EN 62271¬1, Class "Minus 5 Indoor”. A proper functioning is also guaranteed up to temperatures of up to ¬15°C. The maximum value of the ambient temperature is 40°C; the ...

thermal-magnetic circuit breaker
thermal-magnetic circuit breaker

VAC: 230 V
Rating: 2 A - 32 A

See the other products
DIGITAL ELECTRIC
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
MTZ‐D234 series

Primary current: 2 A - 125 A
VAC: 12 V - 400 V
Rating: 1 A - 63 A

See the other products
DIGITAL ELECTRIC
residual current circuit breaker
residual current circuit breaker
JVS16-C

Primary current: 15,000, 20,000 A
VAC: 320 V

See the other products
DIGITAL ELECTRIC
hydraulic-magnetic circuit breaker
hydraulic-magnetic circuit breaker
A series

Primary current: 0.02 A - 50 A
VAC: 125 V - 277 V
VDC: 80 V

... harsh environment applications. Adding to the breaker’s safety features are options for the exclusive Rockerguard and/or push-to-reset bezels for rocker actuated configurations.  This up to 50 amp breaker ...

See the other products
Carling Technologies
motor protection circuit breaker
motor protection circuit breaker

Primary current: 0.16 A - 100 A

Motor Protection Circuit Breakers with special features: Find four device sizes with a short-circuit breaking capacity of up to 100kA and tripping ranges up to 100A. Among other things, ...

digital circuit breaker
digital circuit breaker
GFCI

Rating: 60 A

... Eaton’s BR two-pole ground fault circuit breaker boasts an improved series rating, offering additional combinations up to 60 A. And with higher interrupts and #3AWG lugs that reduce wiring costs, the ...

air-operated circuit breaker
air-operated circuit breaker
AE-SW series

Primary current: 1,000 A - 6,000 A
VAC: 690 V

This kind of breaker is used as the main power breaker of the supply such as buildings, factories and ships etc. and satisfy the various needs.

See the other products
MITSUBISHI ELECTRIC AUTOMATION
exhibit your products

& reach your clients in one place, all year round

Exhibit with us
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.