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Circuit and Load Protection
Allen‑Bradley

Circuit and Load Protection products protect solenoids, relay coils, pilot devices, PLC outputs, and more.
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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.
140G Circuit Breakers
Our Bulletin 140G Molded Case Circuit Breakers have nine different frame sizes with a range of 10...3000 A.
Right side view of one, black rotary operator with a black handle
140G Through the Door Rotary Operator
Simplified panel assembly and operation allows you to control the protected circuit breaker and retain functionality whether the panel door is open or closed.
140M IEC Circuit Breakers
Our Bulletin 140M Motor Protection Circuit Breakers are discontinued and no longer available for sale. We recommend that you migrate to our Bulletin 140MT Motor Protection Circuit Breakers.
140M MCP
Rockwell Automation announces that as of March 2022, our Bulletin 140M Motor Circuit Protectors will be discontinued and no longer available for sale. We recommend you migrate to our Bulletin 140MT Motor Circuit Protectors.
140MG MCP
These devices provide a disconnecting means for motor branch circuit, branch-circuit and short-circuit magnetic protection, and manual switching. These devices are rated from 3...1200 A.
140MG MPCB
These circuit breakers can provide a disconnecting means for motor branch circuit, branch-circuit and short-circuit magnetic protection, overload thermal protection, and manual switching.
140MP MPCB
Our Bulletin 140MP motor protection circuit breakers provide magnetic short-circuit and thermal overload protection up to 32 A, with an interrupting rating @400V of up to 100 kA.
140MT MCP
Our Bulletin 140MT Motor Circuit Protectors (D9N version), rated up to 40A, can be applied in combination with Contactors and Overload relays.
140MT MPCB
Our Bulletin 140MT Motor Protection Circuit Breakers (MPCBs) provide cost-saving magnetic short-circuit and thermal overload protection up to 40A.
140U Circuit Breakers
Our Bulletin 140U Molded Case Circuit Breakers are discontinued and no longer available for sale. We recommend you migrate to our Bulletin 140UT Molded Case Circuit Breakers.
140UT MCCB
These are current-limiting circuit breaker that provide fixed short-circuit and overcurrent protection, offer high interrupting ratings for 2- and 3-pole devices, and are suitable for back feeding at 240V and 480Y/277V.
1489-M Thermal-magnetic Circuit Breakers
These circuit breakers are ideal for extreme ambient conditions, feature fast breaking time, and superior shock and vibration resistance.
1491 Fuse Blocks
Our Bulletin 1491 Fuse Blocks are designed for general purpose applications. The bases of these blocks, either phenolic or porcelain, are rugged in construction and provide ease in mounting and wiring.
1492-D DC High Voltage Miniature Circuit Breakers
These circuit breakers provide overcurrent and short circuit protection for higher voltage DC circuits and feature dual terminals and are multi-wire rated for up to four wires.
1492-FB Fuse Holders
Our fuse holders give you a safe and convenient means for installation of class CC, J, and midget fuses.
1492-GH High-density Circuit Breakers
These circuit breakers incorporate a thermal portion and a magnetic trip function for the combined advantages of two sensing systems.
1492-MC Thermo-magnetic Circuit Breakers
These circuit breakers combine thermal and magnetic trip actions and provide accurate overload and short-circuit protection for conductors and connected equipment.
1492-RCDA Residual Current Devices
These devices detect and interrupt leakage to the ground, helping you prevent injury to exposed personnel and damage to equipment.
1492-SPM Supplementary Protectors
These supplementary protectors are are current-limiting and feature dual terminals for wiring and bus bar flexibility.
1494C Cable-operated
Our Bulletin 1494C Cable-operated Disconnect Switches are discontinued and no longer available for sale. Customers are encouraged to migrate to our Bulletin 1494U Universal Disconnect Switches.
1494F Fixed-depth
Our Bulletin 1494F Fixed-depth Flange-mounted Disconnect Switches are discontinued and no longer available for sale. Customers are encouraged to migrate to our Bulletin 1494U Universal Disconnect Switches.
1494G Hazardous Location
Our Bulletin 1494G Hazardous Location Safety Disconnect Switches can be used for 30 A, 60 A and 100 A applications.
1494G Heavy Industrial Safety Disconnect Switches
Our Bulletin 1494G Heavy Industrial Safety Disconnect Switches offer 30…600 A switch ratings. They are available in Type 3R/4/12 painted metal, Type 4/4X stainless steel and Type 4/4X non-metallic enclosures.
two 1494H-HL Safety Rotary Disconnect Switches
1494H Industrial
Our Bulletin 1494H Industrial and Bulletin 1494HL General Duty Safety Disconnect Switches are designed for industrial and heavy commercial applications and can also be used in “at motor” disconnect switch applications.
1494R Variable-depth
Our Bulletin 1494R Variable-depth Door-mounted Rotary Disconnect Switches are discontinued and no longer available for sale. Customers are encouraged to migrate to our Bulletin 194R Rotary Disconnect Switches.
1494U Universal
Our Bulletin 1494U Universal Disconnect Switches provide the extra level of visual ON or OFF indication of a knife-blade disconnect design.
1494V Variable Depth
Our Bulletin 1494V Variable Depth Flange-mounted Disconnect Switches are discontinued and no longer available for sale. Customers are encouraged to migrate to our Bulletin 1494U Universal Disconnect Switches.
1692 Block-style Electronic Circuit Protection
Our Bulletin 1692 Electronic Circuit Protection Modules protect the secondary circuits of 24V DC switched mode power supplies.
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. IO-Link enabled versions provide real-time insight into the status of your control system.
188-J Regional Circuit Breakers
These circuit breakers feature fast breaking time, superior shock and vibration resistance.
193 IEC E1 Plus Relays
Our Bulletin 193 IEC and 592 NEMA E1 Plus Electronic Overload Relays are discontinued and no longer available for sale. To support your transition, customers are encouraged to migrate to our E100 Electronic Overload Relays.
193 IEC E100 Relays
Our E100 Electronic Overload Relays are the next generation basic-tier electronic overload relay. These relays include enhanced features to better safeguard your motor protection investments.
193 IEC E300 Relays
Our Bulletin 193/592 E300™ (networked) and E200™ (non-networked) offer a modular design, communication options, diagnostic information, simplified wiring, and integration into Logix technology.
193-K IEC Bimetallic Miniature
Our Bulletin 193-K IEC Miniature Bimetallic Overload Relays are designed for use with Bulletin 100-K Contactors and Bulletin 104-K Reversing Contactors. These thermal overload relays include a differential mechanism for sensitivity to phase-loss conditions.
193-T1 CT IEC Bimetallic Standard
Our Bulletin 193-T1 IEC Bimetallic Overload Relays are designed for use with Bulletin 100-C Contactors and Bulletin 104-C Reversing Contactors.
194E Load Switches
Our Bulletin 194E Load Switches are designed for use as local motor isolation and disconnect switch applications.
194L Control and Load Switches
Our Bulletin 194L Control and Load Switches are flexible, adaptable, time- and space-saving devices.
three 194R Non-visible Blade Rotary Disconnect Switches
194R Fused and Non-fused
These switches offer fused and non-fused versions from 20...1250 A and can be ordered with or without an enclosure.
three 194U rotary disconnect switches
194U Non-fused Rotary Disconnect Switches
These switches are available in non-fused versions from 30...160 A that permit the use of your own fuse blocks.
4983-DC Surge Protector And Filters
4983-DD Dataline Surge Protectors
Our Bulletin 4983-DD DIN Rail Dataline Surge Protective Devices protect industrial communication networks.
4983-DH Heavy Duty Surge Protectors
Bulletin 4983-DH Heavy-Duty AC Surge Protector combines a high-energy varistor (MOV) network with a gas discharge tube to better protection level, life duration, and leakage control.
4983-DS Surge Protectors
Our Bulletin 4983-DS DIN Rail AC Surge Protective Devices are connected in parallel and use an MOV to clamp high-voltage surges.
4983-PF Panel Mount Filters
Our Bulletin 4983-PF Panel Mount Filters provide noise protection.
592 NEMA Eutectic Alloy
Bulletin 592 Eutectic Alloy Overload Relays are thermal type devices.
809S Current Monitoring
Our Bulletin 809S Current Monitoring Relays provides under- and over-current detection and supplementary protective functions that are easily added and applied to your motor control circuits.
813S Voltage Monitoring
Our Bulletin 813S Voltage Monitoring Relays offer state-of-the-art supplementary protective functions that you can easily add and apply to your motor control circuits.
814S Power Monitoring
Our Bulletin 814S Power Factor Monitoring Relays and Power (kW) Monitoring Relays offer state-of-the-art supplementary protective functions that you can easily add and apply to your motor control circuits.
817S Thermistor Monitoring
Our Bulletin 817S Thermistor Monitoring Relays protects equipment from over-temperature conditions and offers supplementary motor protective functions that you can easily add and apply to your motor control circuits.
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.
Bulletin 857 Motor-feeder Protection Relays
Our Medium Voltage Bulletin 857 Motor-feeder Protection Relays are discontinued and no longer available for sale. We have tools to help you transition to more modern technologies.
Bulletin 865 Motor-feeder Protection Relays
Our Medium Voltage Bulletin 865 Motor-feeder Protection Relays are discontinued and no longer available for sale. We have tools to help you transition to more modern technologies.
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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.

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In ROK Talk on Industrial Components Episode 6, Bill and Paul talk to Technology Consultant, Simon Johnson, about the history, purpose and unique features of each circuit breaker. Allen‑Bradley is famous for acronym use; especially, when it involves circuit breakers-MCCBs, MPCBs, MCPs, MCBs. What is each and how do you know which to use?

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