Circuit Breakers – Electric Breakers | Schneider Electric USA

Circuit breakers perform 3 key functions: protection, switching, and monitoring. Circuit breakers are designed to “break” (discontinue) the flow of electricity to protect people and equipment when current reaches an unsafe level due to overload, short circuit, or other electrical faults. Different types of circuit breakers may include design features that provide ground fault and/or arc fault protection for residential use, or with metering and alarm functions, and remote on/off control for commercial and industrial use. We are your one source solution for all your circuit breaker and equipment needs. We have the broadest array of circuit breakers in the industry, including Square D circuit breakers for superior circuit protection, the legendary PowerPact molded case circuit breaker (MCCB), and high current MasterPact air circuit breakers (ACB). Our products deliver the reliability and performance you and your customers demand.

Molded Case Circuit Breakers

Discover our range of molded case circuit breakers with frame sizes from 15 to 3000 A and various connection and mounting options, including the I-Line plug-on connection. Features the PowerPacT series breakers.

PowerPacT B-Frame Molded Case Circuit Breakers

PowerPacT B-Frame Molded Case Circuit Breakers

A flexible, high-performance circuit breaker, certified to global standards from 15 to 125 A. PowerPacT B circuit breakers – efficiency that clicks. Also available in I-line construction.

Part of PacT Series

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PowerPacT H-Frame Molded Case Circuit Breakers

PowerPacT H-Frame Molded Case Circuit Breakers

A flexible, high-performance offer, certified to global standards for ratings from 15 to 150A. The PowerPacT H, J, and L-frame circuit breakers are designed to protect electrical systems from damage caused by overloads and short circuits. H and J-frame circuit breakers are available with either thermal-magnetic or Micrologic electronic trip units. L-frame circuit breakers are available with Micrologic electronic trip units only. Also available in I-line construction.

Part of PacT Series

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PowerPacT J-Frame Molded Case Circuit Breakers

PowerPacT J-Frame Molded Case Circuit Breakers

A flexible, high-performance offer, certified to global standards for ratings from 70 to 250 A. The PowerPacT H, J, and L-frame circuit breakers are designed to protect electrical systems from damage caused by overloads and short circuits. H and J-frame circuit breakers are available with either thermal-magnetic or Micrologic electronic trip units. L-frame circuit breakers are available with Micrologic electronic trip units only. Also available in I-line construction.

Part of PacT Series

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PowerPacT Q-Frame Molded Case Circuit Breakers

PowerPacT Q-Frame Molded Case Circuit Breakers

Basic thermal magnetic protection from 75 to 250 A. PowerPacT Q-Frame circuit breakers are used for overcurrent protection and switching on ac systems, with thermal magnetic protection for ratings from 75 to 250A. Also available in I-line construction.

Part of PacT Series

PowerPacT L-Frame Molded Case Circuit Breakers

PowerPacT L-Frame Molded Case Circuit Breakers

A flexible, high-performance offer, certified to global standards for ratings from 70 to 600 A. The PowerPacT H, J, and L-frame circuit breakers are designed to protect electrical systems from damage caused by overloads and short circuits. H and J-frame circuit breakers are available with either thermal-magnetic or Micrologic electronic trip units. L-frame circuit breakers are available with Micrologic electronic trip units only. Also available in I-line construction.

Part of PacT Series

PowerPacT M-Frame Molded Case Circuit Breakers

PowerPacT M-Frame Molded Case Circuit Breakers

A flexible, high-performance offer, certified to global standards from 300 to 800 A. The PowerPacT M-Frame, P-Frame, and R-Frame circuit breakers are designed to protect electrical systems from damage caused by overloads and short circuits. Also available in I-line construction.

Part of PacT Series

PowerPacT P-Frame Molded Case Circuit Breakers

PowerPacT P-Frame Molded Case Circuit Breakers

A flexible, high-performance offer, certified to global standards from 100 to 1200 A. The PowerPacT M-frame, P-frame, and R-frame circuit breakers are designed to protect electrical systems from damage caused by overloads and short circuits. These breakers are available with Micrologic electronic trip units. Also available in I-line construction.

Part of PacT Series

PowerPacT R-Frame Molded Case Circuit Breakers

PowerPacT R-Frame Molded Case Circuit Breakers

A flexible, high-performance offer, certified to global standards from 240 to 3000 A. The PowerPacT M-Frame, P-Frame, and R-Frame circuit breakers are designed to protect electrical systems from damage caused by overloads and short circuits. These breakers are available with Micrologic electronic trip units. Also available in I-line construction.

Part of PacT Series

Mission Critical Molded Case Circuit Breakers

Mission Critical Molded Case Circuit Breakers

High levels of selective coordination from 70 through 600 A. High performance circuit protection and selective coordination.

LA, LH, Q4 Molded Case Circuit Breakers

LA, LH, Q4 Molded Case Circuit Breakers

Basic thermal magnetic protection from 125 to 400A as part of the Square D portfolio of molded case circuit breakers. Basic thermal magnetic protection.

MasterPacT NT and NW - UL/ANSI

MasterPacT NT and NW - UL/ANSI

LV power circuit breakers from 800 A to 6000 A. MasterPacT NT/NW offers a comprehensive range of circuit breakers designed and tested for applications in accordance to ANSI C37/UL1066 or UL 489 standards.

Part of PacT Series

MasterPacT MTZ Circuit Breakers - UL/ANSI

MasterPacT MTZ Circuit Breakers - UL/ANSI

LV power circuit breakers from 800 A to 6000 A. MasterPacT MTZ offers a complete range with 1 family, 3 frame sizes and multiple ratings designed to protect electrical systems from damage caused by overloads, short circuits and equipment ground faults.

Part of PacT Series

MasterPacT DC Circuit Breaker

MasterPacT DC Circuit Breaker

For use on ungrounded systems rated 500 Vdc. Insulated case circuit breakers designed for dc voltage systems

Part of PacT Series

Micrologic Trip Units

Micrologic Trip Units

Micrologic electronic trip units are designed for use in both PowerPact and Masterpact circuit breakers. All Micrologic trip units provide impeccable, electronic circuit protection with adjustable protection settings for maximum system coordination and flexibility. Sophisticated functionality, such as energy and power quality metering capabilities, is integrated in the more advanced trip units.

Part of PacT Series

E-Frame Circuit Breakers

E-Frame Circuit Breakers

Square D™ NF lighting panelboard circuit breakers. Lighting panelboard circuit breakers from Square D™ by Schneider Electric™ provide a wide variety of robust features for use in Square D NF panelboards. With current ratings from 15 to 125 Amps, and included VISI-TRIP feature, these circuit breakers are proven effective and reliable.

Square D™ Homeline™ Miniature Circuit Breakers

Square D™ Homeline™ Miniature Circuit Breakers

Homeline miniature circuit breakers for Homeline load centers. Engineered for value, Homeline™ Circuit Breakers are designed for fast installation, reliability, and superior circuit protection. With industry leading innovations and exclusive features, Square D Homeline Circuit Breakers are the smart, safe, reliable choice.

Part of Square D Homeline

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Square D™ QO™ and QOB Miniature Circuit Breakers

Square D™ QO™ and QOB Miniature Circuit Breakers

QO and QOB miniature circuit breakers for QO systems. QO and QOB circuit breakers come in plug-on or bolt-on options and a complete range of amperages and interrupting ranges to fit into various QO distribution panels. QO is the “World’s Finest” Industry leading offer since 1955, with features engineered for faster installation, reliability and quality.

Part of Square D QO

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QOU Unit Mount Circuit Breakers

QOU Unit Mount Circuit Breakers

For overcurrent protection and switching on both AC and DC systems. The perfect choice for OEMs thanks to high performances and multiple mounting options

Part of Square D QO

FDM128

Touch screen monitor to view and control. The FDM128 display for 8 LV devices is a 1-to-8 human machine interface (HMI). The main component is a 5.7 inch touch screen. The FDM128 display unit can be set up in one or any combination of IFE gateway, Acti9 Smartlink Ethernet, or PowerLogic EGX300 Ethernet gateway. The display unit can monitor and control up to 8 LV devices. The information displayed includes measurements, alarms, and operating assistance data.

Part of EcoStruxure

Enerlin’X IFE, EIFE, IFM

Enerlin’X IFE, EIFE, IFM

Interface and gateway for Ethernet and Modbus-SL communication. Enerlin’X IFE, EIFE, IFM interfaces enables Masterpact, PowerPact, and Compact circuit breakers to be connected to an Ethernet or Modbus-SL network

Part of EcoStruxure

Enerlin'X Input/Output (I/O) application module

I/O Module

Eases circuit breaker status monitoring. The IO input/output interface module for LV circuit breakers is part of the ULP system with built-in functionalities. It can be used for various predefined and user defined applications with Masterpact™ and Powerpact™ circuit breakers.

Part of EcoStruxure

PowerPact P-Frame Electronic Motor Circuit Protectors

PowerPact P-Frame Electronic Motor Circuit Protectors

A flexible, high-performance offer, certified to global standards ranging from 600 to 1200 A. Motor protection circuit breakers provide built-in thermal and magnetic protection. They are used in two-device motor feeder solutions to provide protection against short-circuits, overloads, and phase unbalance. Also available in I-line construction.

Part of PacT Series

Vigirex Ground-fault Relay System

Vigirex Ground-fault Relay System

Ground fault protection or monitoring from 30mA to 30A. Used at all levels of an installation: power distribution, industrial control and final distribution, as well as with a variety of OEM equipment.

Part of PacT Series

PowerPacT Earth Leakage Modules

PowerPacT Earth Leakage Modules

Ground fault protection from 30mA to 3A. For PowerPacT H- and J-Frame circuit breakers to provide equipment ground fault protection from 30mA to 3A with adjustable time delays for flexibility

Micrologic Add-on Ground-fault Modules

Micrologic Add-on Ground-fault Modules

For PowerPact H- and J-Frame circuit breakers. For PowerPact H- and J-Frame circuit breakers to provide equipment ground fault protection from 20A to 200A with adjustable time delays for flexibility

Part of PacT Series

500 VDC TM CB - PowerPacT J DC

500 VDC TM CB - PowerPacT J DC

A flexible, high-performance offer for DC circuits from 30 to 1200 A. Systems that use batteries as a power source, such as an uninterruptible power supply (UPS), require special consideration when specifying overload protection. PowerPacT 500 Vdc molded case circuit breakers are designed per UL Supplement SC for use in an ungrounded dc system using an uninterruptible power supply (UPS), with a nominal voltage of 500 Vdc or a maximum (floating) voltage of 600 Vdc.

Part of PacT Series

Dual Rated AC/DC Circuit Breakers

Dual Rated AC/DC Circuit Breakers

Dual Rated AC/DC Circuit Breakers. Circuit breakers that have both dc ratings and ac ratings for application on either system

Low Ampere QYU Unit Mount Miniature Supplementary Protectors

Low Ampere QYU Unit Mount Miniature Supplementary Protectors

Available for surface, flush, or DIN mounting. QYU 277 Vac supplementary protectors are available for surface, flush or DIN-rail mounting in 1-pole construction.

Industrial and Residential Circuit Breaker Enclosures

Industrial and Residential Circuit Breaker Enclosures

Designed to be tough, reliable and provide exceptional performance in the most grueling conditions. Provides a dead front housing for circuit breakers, molded case switches, and motor circuit protectors to prevent personnel from accidentally contacting energized parts. Provides NEC 100 compliant sealable equipment. Meet the lock out/tag out requirements of OSHA 29 CFR 1910.147 subpart S. Designed to meet or exceed UL 50 requirements for specific environmental conditions. Complies with NEC 240.30. Protect breaker from physical damage. Allow breaker operation without removing cover

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Arc Flash Protection & Safety

Electrical arc flash protection is essential for safe and reliable operation of your facility’s power system. Find best practices on arc flash safety.

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What is switchgear?

Electrical switchgear is a vital system in industries that experience electrical faults or those that need to regularly de-energize equipment for maintenance. Learn switchgear fundamentals and how to keep your equipment in good shape.

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Electrical fire protection

Across the globe, electrical fires cause significant damage to buildings of all sizes. These are just some of our solutions for electrical fire prevention. Explore the risk areas, discover protection tips and view our other solutions to help you design, build and install.

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