Eaton Type C371 Flange-Mount C...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$273.86
Eaton Type C371 Flange-Mount Circuit Breaker Operator Mechanism

Eaton Type C371 Flange-Mount Circuit Breaker Operator Mechanism

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Model: C371F

In Stock (leaves warehouse same day if ordered before 3pm ET)

$273.86
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Eaton Type C371 Flange-Mount Circuit Breaker Operator Mechanism

The Eaton Type C371 is a flange-mount circuit breaker operator mechanism engineered for use with Eaton HMCP and Series C molded case circuit breakers. Built for panelboard and switchgear applications, this operator mechanism ships with a 4-inch handle to provide reliable, external manual operation of the breaker while the enclosure remains closed. Electrical contractors and panel builders rely on the Type C371 to deliver consistent, code-compliant switching performance in commercial and industrial power distribution equipment.

Key Features

  • Flange Mounting: Designed for flange installation, allowing the operator handle to be securely fixed to the enclosure or panel face.
  • Breaker Compatibility: Engineered specifically for use with Eaton HMCP and Series C circuit breakers, ensuring correct fit and reliable mechanical actuation.
  • 4-Inch Handle Included: Supplied with a 4-inch operating handle for convenient, external breaker switching without opening the enclosure door.
  • External Operation: Enables safe on/off/trip operation of the breaker from outside the enclosure, supporting standard electrical safety practices.
  • Mechanical Linkage Design: Provides a dependable mechanical connection between the external handle and the internal breaker mechanism.
  • Durable Build: Constructed for long-term use in demanding commercial and industrial electrical environments.

Technical Specifications

  • Product Type: Circuit Breaker
  • Department: Electrical
  • Mounting: Flange
  • Series: HMCP and Series C
  • Accessories: 4-inch handle

Typical Applications

  • Panelboard and Switchgear Assemblies
  • Commercial and Industrial Electrical Installations
  • Motor Control Centers
  • Remote or External Circuit Breaker Operation
  • Retrofit and Replacement of Existing Operator Mechanisms
  • New Construction and Electrical System Upgrades

Why Eaton?

Eaton is a recognized manufacturer of circuit protection and power distribution equipment, and the Type C371 operator mechanism reflects that focus on dependable, purpose-built hardware. Designed specifically for compatibility with HMCP and Series C breakers, this flange-mount mechanism with its included 4-inch handle helps ensure safe, consistent breaker operation for professional electrical installations. Choosing genuine Eaton accessories helps maintain the fit, function, and reliability of your circuit breaker system.

Product Specs

Mounting Method:
Flange
Series:
HMCP and Series C
Accessories:
4-inch handle
Product Type:
Breaker Handle Operator
Department:
Electrical
Configuration:
Flange Mount
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers

Eaton C371F – Frequently Asked Questions

1) Which Eaton breakers does the Type C371 operator mechanism work with?
The Type C371 flange-mount operator mechanism is built for Eaton HMCP and Series C molded case breakers. It comes in two versions matched to the breaker frame: the C371E2 for EHD frame breakers at 150 amperes, and the C371F for KD frame breakers at 250 amperes. Pick by the frame designation stamped on your breaker, not just the amp rating.
2) What is the difference between the Eaton C371E2 and C371F operator mechanisms?
Frame size is the whole difference. C371E2 pairs with the EHD frame at 150 amperes; C371F pairs with the KD frame at 250 amperes. Both are flange-mount mechanisms for HMCP and Series C breakers and both ship with a 4-inch handle. Ordering the wrong one means the linkage will not match the breaker.
3) Does the Eaton C371 operator come with a handle, or do I order that separately?
A 4-inch operating handle ships with the mechanism, so you do not order it separately. The handle mounts to the enclosure face and lets you switch the breaker on, off, or reset a trip with the door closed.
4) Is the C371 a door-mounted or flange-mounted breaker operator?
Flange mount. The handle assembly fixes to the enclosure or panel face rather than riding on the door, which is the arrangement used in panelboards, switchgear and motor control centers where the operator has to stay put independent of the door swing. If your assembly is specified for a door-mounted variable-depth operator, this is not that part.
5) Can I use the Eaton C371 to replace an existing breaker operator mechanism in a panel?
Retrofit and replacement of existing operator mechanisms is one of its stated uses, along with new construction and system upgrades. The condition is that the breaker itself is an Eaton HMCP or Series C in the matching frame, EHD for the C371E2 or KD for the C371F. Same-frame swap, and the mechanical linkage lines up.
6) Why would I put an operator mechanism on a circuit breaker instead of just opening the panel?
It keeps the operation outside the enclosure. The mechanical linkage ties the external 4-inch handle to the breaker mechanism, so an electrician can switch or reset the breaker with the door shut, which is what standard electrical safety practice calls for on commercial and industrial gear. It also gives you a defined handle position for lockout on the panel face.
How fast can I get the Eaton C371F delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Eaton C371F come with a warranty?
Absolutely. The Eaton C371F is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Eaton C371F?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Eaton C371F from ZenSupply?
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