140M-F8E-C45 | Allen-Bradley Motor Protection Circuit Breaker, 32-45A
140M-F8E-C45 | Allen-Bradley Motor Protection Circuit Breaker, 32-45A
140M-F8E-C45 | Allen-Bradley Motor Protection Circuit Breaker, 32-45A
    140M-F8E-C45 | Allen-Bradley Motor Protection Circuit Breaker, 32-45A
140M-F8E-C45 | Allen-Bradley Motor Protection Circuit Breaker, 32-45A

140M-F8E-C45 | Allen-Bradley Motor Protection Circuit Breaker, 32-45A

Part #: 140M-F8E-C45 Manufactured by: Allen-Bradley
$250.00
$250.00
5 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
Allen-Bradley 140M-F8E-C45 Motor Protection Circuit Breaker (MPCB), Standard Magnetic Trip (Fixed at 13 x le), 32 - 45A, H...  Read more
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Product Description P/N: 140M-F8E-C45

Description / Specifications

Description 

The Allen-Bradley 140M-F8E-C45 is a high-breaking-capacity motor protection circuit breaker designed to provide dependable overload and short-circuit protection for motors in industrial applications. With an adjustable trip range of 32–45 A, it enables reliable manual motor starting and safeguarding for standard-duty installations. This breaker is widely used in motor control panels, machinery, and automated systems where compact, robust motor protection is essential.

 

 

Technical Specifications 

Condition New / Never Used Surplus
Brand Allen-Bradley
Category Motor Protection Circuit Breakers
Part Number 140M-F8E-C45
Subcategory Motor Protection, Thermal-Magnetic
Circuit Breaker Type Motor Protection Circuit Breaker
Trip Type Thermal-Magnetic
Trip Range 32–45 A (fixed magnetic trip at 13×Ie)
Voltage Rating 200–690 V AC
Interrupt Rating 65 kAIC
Supply Voltage 480 V, 60 Hz
Coordination Type Type 1
Frame Size F (45 A)
Power Rating 22 kW at 400 V (3-phase), 13 kW at 230 V (3-phase)
Amperage (General) 1200 A (catalog reference)
Motor Protection Yes – standard duty
Module Format Standard
Marking CE
Weight 0.3 kg
Standards CCC, CE, CSA, UL, cUL, GOST
Features Visible trip indication, high switching capacity
Applications Motor protection, industrial machinery control

 

 

Information About 140M-F8E-C45

The 140M-F8E-C45 belongs to the Allen-Bradley 140M family of motor protection circuit breakers and features a Frame Size F, supporting applications up to 45 A. It uses a thermal-magnetic trip unit, combining long-time overload protection with instantaneous magnetic fault clearing. Rated for 200–690 V, this breaker provides a high interrupting capacity of 65 kAIC, ensuring reliable performance in harsh industrial power environments. It supports Type 1 coordination, making it suitable for standard motor applications. Designed with a fixed magnetic trip at 13 × Ie and visible trip indication, it enhances both safety and operational awareness. With compatibility across a wide accessory range, the 140M-F8E-C45 offers flexibility for diverse motor control configurations.

Key Features:

  • Adjustable Trip Range: Supports 32–45 A for motor protection across multiple sizes.
  • Thermal-Magnetic Trip Unit: Provides both overload and instantaneous short-circuit protection.
  • High Interrupt Rating: 65 kAIC fault interruption for demanding industrial environments.
  • Wide Voltage Support: Operates across 200–690 V AC systems.
  • Manual Motor Starting: Enables direct ON/OFF motor control for non-severe duty applications.
  • High Breaking Capacity: Designed for reliable clearing of high fault currents.
  • Visible Trip Indication: Simplifies diagnostics and enhances operator safety.
  • Frame Size F: Suitable for motors up to 45 A.
  • Accessory Compatibility: Supports a broad range of add-ons for enhanced functionality.
  • Global Compliance: Meets CE, UL, CSA, CCC, GOST, and cUL standards.

The 140M-F8E-C45 delivers rugged, dependable motor protection for industrial machinery and electrical control systems.

Frequently Asked Questions about 140M-F8E-C45
Question: What is the main function of the 140M-F8E-C45?
Date Update:12/06/2025
Answer:

The 140M-F8E-C45 is a thermal-magnetic motor protection circuit breaker designed to protect three-phase motors from overloads and short circuits. It uses a bimetallic trip mechanism to respond to long-term overcurrent and a magnetic trip for instantaneous short circuit protection. This dual protection ensures that motors are safeguarded from both gradual and sudden electrical faults. It's especially useful in industrial automation systems where motor reliability is critical. This breaker contributes to increased operational safety and reduced equipment downtime.

Question: What is the rated current range?
Date Update:12/06/2025
Answer:

The 140M-F8E-C45 supports an adjustable thermal current range between 32 and 45 Amperes. This setting allows users to match the breaker’s protection to the specific current characteristics of the connected motor. By adjusting the dial, the device can accommodate motors with different ratings within that range. This flexibility makes it suitable for diverse motor-driven applications. Proper adjustment ensures accurate overload protection and enhances motor lifespan.

Question: Is it suitable for 3-phase systems?
Date Update:12/06/2025
Answer:

Yes, the 140M-F8E-C45 is explicitly designed for three-phase motor protection. It monitors all three phases to detect unbalanced currents, overloads, and faults. This makes it ideal for motors in conveyors, pumps, compressors, and industrial automation. Three-phase compatibility is essential in high-power applications. Its robust design ensures consistent protection across all three phases.

Question: What alternatives are available if the product becomes unavailable?
Date Update:12/06/2025
Answer:

If the 140M-F8E-C45 is no longer available in the future, Rockwell Automation typically recommends other 140M frame-size motor protection breakers in the same family. Alternatively, the 140U line or E100 electronic overload relays may serve as suitable replacements depending on the application. It’s important to match current, voltage, and interrupting capacity. Always verify compatibility with your motor and control system. Rockwell’s Product Compatibility and Migration (PCAM) tool can help identify suitable alternatives.

Question: Is this circuit breaker still in production?
Date Update:12/06/2025
Answer:

No, the 140M-F8E-C45 will be officially discontinued as of May 2, 2025, according to Rockwell Automation’s lifecycle announcement. After this date, it will no longer be available for sale, and customers are advised to remove it from new designs. Users are encouraged to transition to its engineering replacement, the 140MT-F9E-C45, which offers similar functionality with updated features. Planning a migration in advance ensures continued support and compatibility in motor protection systems. Always consult official product documentation and lifecycle tools to ensure proper replacement and compliance.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 140M-F8E-C45 is a high-breaking-capacity motor protection circuit breaker designed to provide dependable overload and short-circuit protection for motors in industrial applications. With an adjustable trip range of 32–45 A, it enables reliable manual motor starting and safeguarding for standard-duty installations. This breaker is widely used in motor control panels, machinery, and automated systems where compact, robust motor protection is essential.

 

 

Technical Specifications 

Condition New / Never Used Surplus
Brand Allen-Bradley
Category Motor Protection Circuit Breakers
Part Number 140M-F8E-C45
Subcategory Motor Protection, Thermal-Magnetic
Circuit Breaker Type Motor Protection Circuit Breaker
Trip Type Thermal-Magnetic
Trip Range 32–45 A (fixed magnetic trip at 13×Ie)
Voltage Rating 200–690 V AC
Interrupt Rating 65 kAIC
Supply Voltage 480 V, 60 Hz
Coordination Type Type 1
Frame Size F (45 A)
Power Rating 22 kW at 400 V (3-phase), 13 kW at 230 V (3-phase)
Amperage (General) 1200 A (catalog reference)
Motor Protection Yes – standard duty
Module Format Standard
Marking CE
Weight 0.3 kg
Standards CCC, CE, CSA, UL, cUL, GOST
Features Visible trip indication, high switching capacity
Applications Motor protection, industrial machinery control

 

 

Information About 140M-F8E-C45

The 140M-F8E-C45 belongs to the Allen-Bradley 140M family of motor protection circuit breakers and features a Frame Size F, supporting applications up to 45 A. It uses a thermal-magnetic trip unit, combining long-time overload protection with instantaneous magnetic fault clearing. Rated for 200–690 V, this breaker provides a high interrupting capacity of 65 kAIC, ensuring reliable performance in harsh industrial power environments. It supports Type 1 coordination, making it suitable for standard motor applications. Designed with a fixed magnetic trip at 13 × Ie and visible trip indication, it enhances both safety and operational awareness. With compatibility across a wide accessory range, the 140M-F8E-C45 offers flexibility for diverse motor control configurations.

Key Features:

  • Adjustable Trip Range: Supports 32–45 A for motor protection across multiple sizes.
  • Thermal-Magnetic Trip Unit: Provides both overload and instantaneous short-circuit protection.
  • High Interrupt Rating: 65 kAIC fault interruption for demanding industrial environments.
  • Wide Voltage Support: Operates across 200–690 V AC systems.
  • Manual Motor Starting: Enables direct ON/OFF motor control for non-severe duty applications.
  • High Breaking Capacity: Designed for reliable clearing of high fault currents.
  • Visible Trip Indication: Simplifies diagnostics and enhances operator safety.
  • Frame Size F: Suitable for motors up to 45 A.
  • Accessory Compatibility: Supports a broad range of add-ons for enhanced functionality.
  • Global Compliance: Meets CE, UL, CSA, CCC, GOST, and cUL standards.

The 140M-F8E-C45 delivers rugged, dependable motor protection for industrial machinery and electrical control systems.

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