140MF8EC45

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Overview of Allen Bradley 140MF8EC45

The Allen Bradley 140MF8EC45 is a high-performance motor protection circuit breaker from the 140M series, designed to deliver reliable protection for three-phase motors up to 45A. Built for demanding industrial applications, this device combines thermomagnetic overload and short-circuit protection in one compact unit. It supports manual motor control with a turn handle, making it well-suited for both new installations and as a replacement for standard motor protective switches. With a robust screw connection design and IP2X protection, the 140MF8EC45 is engineered for durability and easy maintenance in diverse environments. Its versatility and high breaking capacity make it a dependable choice for motor circuits in factories, process plants, and automation systems.

Key Features of Allen Bradley 140MF8EC45

  • Rated permanent current: 45A with a 32-45A adjustable overload protection range
  • Thermomagnetic trip mechanism for reliable motor protection
  • Maximum rated operational voltage: 690V AC
  • High short-circuit breaking capacity: 65kA at 400V AC
  • Rated operation power: 22kW at 400V, AC-3 duty
  • Manual on/off control via turn handle
  • Screw-type main circuit electrical connections
  • 3-pole configuration for three-phase motor applications
  • Ingress protection: IP2X rated for basic environmental sealing
  • Compact dimensions and lightweight design for easy panel integration

Technical Specs of 140MF8EC45

Parameter Value
Rated Permanent Current (Iu) 45A
Overload Protection Range 32-45A
Maximum Operating Voltage 690V AC
Short-Circuit Breaking Capacity (400V AC) 65kA
Rated Operation Power (AC-3, 400V) 22kW
Connection Type Screw
Poles 3
Control Element Turn handle
IP Rating IP2X
Weight 0.78kg
Dimensions (HxWxD) 111.4 x 54 x 110 mm

Applications / Use Case

The Allen Bradley 140MF8EC45 is primarily used for protecting 3-phase motors in industrial and automation environments. Typical applications include conveyor systems, pumps, fans, compressors, and general machinery where reliable motor protection is essential. Its high breaking capacity and adjustable overload settings allow it to handle both light and severe motor starting duties. The manual control feature enables quick and safe on/off switching, reducing downtime during maintenance. The device’s robust construction and compliance with international standards ensure safe operation in control panels, MCCs, and standalone installations across manufacturing, warehousing, and process industries.

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140MF8EC45

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Does it come with a warranty?

Yes, All products are offered wth 1-Year warranty.

What is the condition of the product?

All products sold are New & Unused.

How fast is shipping?

All products are delivered within 2-8 business days depending on our stock location.

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