A21-B0-12-640-M12-E The Littelfuse Inc. A21-B0-12-640-M12-E is a 1-pole magnetic circuit breaker. It features a 40A current rating and a 277V voltage rating.
Mfr Part #:

A21-B0-12-640-M12-E

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
The Littelfuse Inc. A21-B0-12-640-M12-E is a 1-pole magnetic circuit breaker. It features a 40A current rating and a 277V voltage rating.
Stock on Request
$ Price Range: $0.99

A21-B0-12-640-M12-E Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Actuator Type
Approval Agency
Breaker Type
Current Rating
Current Rating (Amps)
Illumination
Mounting Type
Number of Poles
Storage Temperature
Tape & Reel
Voltage Rating

A21-B0-12-640-M12-E Description

Short technical summary and product information.

This Littelfuse Inc. A21-B0-12-640-M12-E is a single-pole circuit breaker designed for panel mounting. It utilizes a magnetic hydraulic delay mechanism for protection.

 

Key electrical specifications include a current rating of 40A and a voltage rating of 277V. The actuator type is a rocker, and it offers no illumination.

 

This circuit breaker is approved by CCC, CSA, TUV, and UL agencies. It is compliant with RoHS3 standards and has an MSL of 1.

 

Applications for this component include general circuit protection where reliable switching and overcurrent protection are required.

A21-B0-12-640-M12-E Quick Information

Product Type: Circuit Breaker
Canonical Name: Littelfuse Inc. A21-B0-12-640-M12-E Circuit Breaker
Subcategory: Circuit Breakers

A21-B0-12-640-M12-E Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

A21-B0-12-640-M12-E Estimated Pricing

Qty Low High
1+ $0.99 $0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

A21-B0-12-640-M12-E Features

  • 40A current rating for protection.
  • 277V voltage rating for circuits.
  • Panel mount with rocker actuator.
  • Magnetic hydraulic delay type.
  • CCC, CSA, TUV, UL approved.

A21-B0-12-640-M12-E Applications

  • Used in electrical panel protection
  • Suitable for circuit interruption
  • Ideal for industrial electrical systems
  • Mounts on panels for easy access

A21-B0-12-640-M12-E FAQs

6 frequently asked questions generated from this part’s specifications.
What is the current rating of the A21-B0-12-640-M12-E circuit breaker?

The current rating is 40A.

What is the voltage rating for this circuit breaker?

The voltage rating is 277V.

What type of breaker is the A21-B0-12-640-M12-E?

It is a Magnetic (Hydraulic Delay) breaker type.

How many poles does this circuit breaker have?

It has 1 pole.

What is the mounting type for this component?

The mounting type is Panel Mount.

What are the approval agencies for this circuit breaker?

The approval agencies are CCC, CSA, TUV, and UL.

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