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MU1-B-20-450-3-A21-B-A The Littelfuse Inc. MU1-B-20-450-3-A21-B-A is a single-pole, magnetic hydraulic delay circuit breaker. It features a 5A current rating and a 250V voltage rating.
Mfr Part #:

MU1-B-20-450-3-A21-B-A

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
The Littelfuse Inc. MU1-B-20-450-3-A21-B-A is a single-pole, magnetic hydraulic delay circuit breaker. It features a 5A current rating and a 250V voltage rating.
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MU1-B-20-450-3-A21-B-A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Actuator Type
Breaker Type
Current Rating
Current Rating (Amps)
Illumination
Mounting Type
Number of Poles
Voltage Rating
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MU1-B-20-450-3-A21-B-A Description

Short technical summary and product information.

This Littelfuse Inc. MU1-B-20-450-3-A21-B-A is a single-pole circuit breaker designed for panel mounting. It utilizes a magnetic hydraulic delay mechanism for its tripping characteristic.

 

The breaker has a current rating of 5 Amperes and a voltage rating of 250 Volts. The actuator type is push-to-reset, and it does not feature illumination. It is classified as RoHS3 Compliant, has an MSL of 1, and is REACH Unaffected, though these compliance statuses are currently unverified.

 

This component is suitable for applications requiring reliable overcurrent protection with a specific delay characteristic. Its panel mount design facilitates integration into various electrical enclosures and control panels.

MU1-B-20-450-3-A21-B-A Quick Information

Product Type: Circuit Breaker
Series: MU1-B
Canonical Name: Littelfuse Inc. MU1-B-20-450-3-A21-B-A Circuit Breaker

MU1-B-20-450-3-A21-B-A Compliance

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

MU1-B-20-450-3-A21-B-A Features

  • 5A current rating for protection.
  • 250V voltage rating.
  • Magnetic hydraulic delay breaker type.
  • Panel mount design.
  • Push-to-reset actuator.

MU1-B-20-450-3-A21-B-A Applications

  • Provides overcurrent protection.
  • Suitable for control panels.
  • Used in power distribution.
  • Integrates into electrical enclosures.

MU1-B-20-450-3-A21-B-A FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage of this circuit breaker?

250V

What is the mounting style?

Panel mount

What is the current rating?

5A

How many poles does it have?

1

What type of breaker is it?

Magnetic (Hydraulic Delay)

What is the actuator type?

Push to Reset

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Littelfuse MU1-B-62-450-1-A11-B-D is a 1-pole magnetic circuit breaker rated for 5A and 250V. It features a push-to-reset actuator and hydraulic delay for reliable overcurrent protection.
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