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Circuit & Load Protection

Circuit and Load Protection products protect solenoids, relay coils, pilot devices, PLC outputs, and more. They are DIN Rail mountable for quick installation and excellent for high-density configurations. We offer electronic circuit protection modules, circuit breakers, and motor protectors including modular protection systems, bi-metallic or solid-state overload relays and surge protectors and filters.
Circuit & Load Protection
  • Circuit Breakers
  • Disconnect Switches
  • Electronic Circuit Protection Modules
  • Fuse Holders
  • Low Voltage Motor Protectors
  • Medium Voltage Motor Protectors
  • Supplementary Motor Protectors
  • Surge Protectors & Filters
Circuit Breakers

Circuit breakers include industrial DIN Rail circuit breakers, high density miniature circuit breakers, motor circuit protectors, residual current devices, miniature circuit breakers, and supplementary protection devices. We offer many configurations, voltage ranges, and current ranges to meet your requirements.

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Miniature Circuit Breakers

Our miniature circuit breakers are IP20 finger safe and RoHS compliant. These products also meet an expanded set of standards and certifications.

1489 Thermal-magnetic Circuit Breakers» DC High Voltage Miniature Circuit Breakers» High-density Circuit Breakers» Residual Current Devices» Supplementary Protectors» Thermal-magnetic Miniature Circuit Breakers» Regional Circuit Breakers» View All »
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Molded Case Circuit Breakers

Molded Case Circuit Breakers have multiple frame sizes to accommodate your required current ratings and breaking capabilities. These breakers provide protection of circuits against overload, short circuit, and ground fault. They can be combined with our NEMA and IEC motor starters, overload relays, and contactors.

140G Molded Case Circuit Breakers» 140U Molded Case Circuit Breakers» View All »
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Motor Circuit Protectors

Motor Circuit Protectors provide short-circuit protection for individual motor loads and are available for a wide range of motor sizes and installation types. They can be combined with our NEMA and IEC motor starters, overload relays, and contactors.

140M Motor Circuit Protectors» 140MG Motor Circuit Protectors» View All »
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Motor Protection Circuit Breakers

Our Motor Protection Circuit Breakers provide both short circuit and overload protection for individual motor loads and are available for a wide range of motor sizes and installation types. They can be combined with our NEMA and IEC contactors or solid-state motor controllers.

140M Motor Protection Circuit Breakers» 140MG Motor Protection Circuit Breakers» 140MP Motor Protection Circuit Breakers» View All »
Disconnect Switches

Our Disconnect Switches are available in both fixed- and variable-depth styles with flange- or door-mounting styles. Our switches are NEMA, IEC, and UL rated. We offer a variety of fused and non-fused versions from 20...1250 A in both open and enclosed configurations.

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Rotary Disconnect Switches

Our Rotary Disconnect Switches offer a variety of fused and non-fused versions from 20...1250 A and can be ordered with or without an enclosure. Non-fused styles permit use of your own fuse blocks. Fused switches, with integral fuse carriers, reduce panel space requirements.

194R Rotary Disconnect Switches» 194U Non-fused Rotary Disconnect Switches» View All »
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Safety Disconnect Switches

Our Safety Disconnect Switches are designed for industrial and heavy commercial applications, as well as for hazardous locations. These switches offer 30 A, 60 A, 100 A and 200 A ratings.

1494G Hazardous Location Safety Disconnect Switches» 1494G Heavy Industrial Safety Disconnect Switches» 1494H Industrial/General Duty Safety Disconnect Switches» View All »
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Visible Blade Disconnect Switches

Our Visible Blade Disconnect Switches are available in both fixed- and variable-depth styles with flange- or door-mounting options. Flange-mounted disconnect switches are also available in an enclosure.

1494U Universal Disconnect Switches» 1494V Variable Depth Flange-mounted Disconnect Switches» 1494C Cable-operated Disconnect Switches» 1494F Fixed-depth Flange-mounted Disconnect Switches» 1494R Variable-depth Door-mounted Rotary Disconnect Switches» 1491 Fuse Blocks» View All »
Electronic Circuit Protection Modules

Our Electronic Circuit Protection Modules protect the secondary circuits of 24V DC switched mode power supplies. These modules monitor both supply voltage and load currents, and enhance protection over standard thermomagnetic circuit breakers.

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1692 Block-style Electronic Circuit Protectors

Our Bulletin 1692 Electronic Circuit Protection Modules protect the secondary circuits of 24V DC switched mode power supplies. These modules monitor both supply voltage and load currents, and you can monitor and control the modules both locally and remotely.

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1694 Modular Electronic Circuit Protectors

Our modular Bulletin 1694 Electronic Circuit Protectors protect the secondary circuits of 24V DC switch mode power supply against short circuit or overload. The only 12.5mm wide modules can be mounted side by side no further accessories required. They come with time-saving push-in terminals. The protection modules are available in single or double channel in the same compact housing. The range comprise fixed current ratings from 1A..10A and an adjustable current version.

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Fuse Holders

Fuse holders provide a safe and convenient means for installing Class CC, J, and Midget fuses. These fuser holders are excellent for wire protection, small motor loads, and group protection of small motor loads.

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140F Fuse Holders

Bulletin 140F Fuse Holders are available for UL Class CC or Midget Fuses and IEC 10 x 38 mm fuses, with or without blown fuse indication. They are lockable in the open position and compatible with Bulletin 140M accessories.

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1492-FB Fuse Holders

Bulletin 1492-FB Fuse Holders are ideal for many OEM applications. Our fuse holders give you a safe and convenient means for installation of class CC, J, and midget fuses. Use our class CC and J holders for branch circuit protection. They are excellent for wire protection, small motor loads, and group protection of small motor loads.

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Low Voltage Motor Protectors

Low Voltage Motor Protectors includes a broad selection of overload relays, enclosed motor protectors and modular protection systems. This product offering covers bimetallic relays and solid-state overload relays, as well as motor protection circuit breakers.

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Electronic Overload Relays

Our Bulletin 193/592 Electronic Overload Relays offer flexibility and convenience in modular designs. They are available for both NEMA and IEC applications. In addition, this portfolio offers a variety of options including protection and communication modules.

E300/E200 Electronic Overload Relays» E100 Electronic Overload Relays» E1 Plus Electronic Overload Relays» View All »
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Bimetallic Overload Relays

Our Bimetallic Thermal Overload Relays are motor protectors for IEC applications. We designed these relays for use with our contactors and reversing contactors.

IEC Miniature Bimetallic Overload Relays» IEC Bimetallic Overload Relays» View All »
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NEMA Eutectic Alloy Overload Relays

Bulletin 592 Eutectic Alloy Overload Relays are thermal type devices. When used with the proper short-circuit protection, these relays protect the motor, motor controller, and power wiring against overheating due to excessive overcurrents. The trip-free mechanism provides overload protection even when the reset button is pressed.

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825-P Modular Protection System

Our Bulletin 825-P Modular Protection Systems are discontinued and no longer available for sale. Customers are encouraged to migrate to the E300 Electronic Overload Relays.

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Medium Voltage Motor Protectors

Medium Voltage Motor Protectors include Bulletin 857 Motor-Feeder Protection and Bulletin 865 Differential Protection Relay to meet your motor and feeder protection requirements.

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Medium Voltage Motor & Feeder Protection

Bulletin 857 Motor-Feeder Protection, Medium Voltage offers solutions for today’s motor and feeder protection requirements in one package. Our protection relay gives you flexible control to maximize your motor’s output capabilities, and provides current, voltage and motor protection functions. The protection relay can be integrated into a low voltage or medium voltage Motor Control Center, or can be purchased as an OEM component. Configure these relays using our bundled SetPointPS software.

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Medium Voltage Motor & Feeder Differential Protection

Bulletins 865 and 857 Motor and Feeder Protection protects devices in the distribution networks of utilities, industry, power plants and offshore application. Configure these relays using our bundled SetPointPS software.

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Supplementary Motor Protectors

Supplementary Motor Protectors include monitoring relays and arcing ground fault detection systems.

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Monitoring Relays

The MachineAlert™ family of dedicated function motor protection relays offers supplementary protective functions that are easily added to your motor control circuits. These relays meet application requirements for supplemental voltage-, current-, thermistor-, power-, and power factor based protection. MachineAlert relays are an economical choice for protecting equipment investments and minimizing production downtime.

Current Monitoring Relay» Voltage Monitoring Relay» Power Monitoring Relay» Thermistor Monitoring Relay» View All »
Surge Protectors & Filters

Surge Protectors and Filters meet the needs of industrial surge and filter protection requirements. Our surge protectors and filters protect motor drives, contactors, capacitor bank switching and more. They mount to a DIN rail or panel.

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DIN Rail Surge Protector & Filters

Bulletin 4983-DC DIN Rail Filter and Surge Protective Device is the combination of a filter and a surge protective device. This device provides transient and noise protection in one small package.

 

 

View All »
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DIN Rail Dataline Surge Protectors

Bulletin 4983-DD DIN Rail Dataline Surge Protective Devices protect industrial communication networks. These devices use a combination of 3-electrode gas discharge tubes and fast-clamping diodes.

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DIN Rail Heavy Duty AC Surge Protectors

Bulletin 4983-DH Heavy-Duty AC Surge Protector combines a high-energy varistor (MOV) network with a gas discharge tube to increase performance in protection level, life duration, and suppression of leakage current. It is connected in parallel and can be located in the feeder circuit.

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DIN Rail AC Surge Protectors

Bulletin 4983-DS DIN Rail AC Surge Protective Devices are connected in parallel and use an MOV to clamp high-voltage surges. These devices are primarily used in the main electrical panel for the protection of 1- and 3-phase systems.

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Panel Mount Filters

Bulletin 4983-PF Panel Mount Filters provide noise protection. They monitor and clean the wave of high frequency noise disturbances that can cause premature aging.

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