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MU2-B-24-450-1-A21-B-D Littelfuse MU2-B-24-450-1-A21-B-D is a 2-pole magnetic hydraulic delay circuit breaker with 5A current rating and 250V voltage rating. Panel mount, push-to-reset actuation.
Mfr Part #:

MU2-B-24-450-1-A21-B-D

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse MU2-B-24-450-1-A21-B-D is a 2-pole magnetic hydraulic delay circuit breaker with 5A current rating and 250V voltage rating. Panel mount, push-to-reset actuation.
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MU2-B-24-450-1-A21-B-D 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
SVHC Present
Voltage Rating
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MU2-B-24-450-1-A21-B-D Description

Short technical summary and product information.

The Littelfuse MU2-B-24-450-1-A21-B-D is a two-pole magnetic circuit breaker featuring hydraulic delay overload protection. It is rated for 5A continuous current at 250V AC/DC, making it suitable for power distribution and equipment protection in industrial and commercial applications. The breaker employs a magnetic (hydraulic delay) trip mechanism, which provides precise, time-delayed overcurrent protection. Its push-to-reset actuator allows manual reset after a trip event, while the panel mount design facilitates easy installation into control panels and enclosures. This model is CCC, CSA, UL, and VDE approved for global compliance.

MU2-B-24-450-1-A21-B-D Quick Information

Product Type: Circuit Breaker
Series: MU2-B
Canonical Name: MU2-B-24-450-1-A21-B-D Magnetic Hydraulic Delay Circuit Breaker
Subcategory: Magnetic Circuit Breaker

MU2-B-24-450-1-A21-B-D Compliance

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

MU2-B-24-450-1-A21-B-D Features

  • Rated for 5A continuous operation.
  • Supports 250V AC/DC circuits.
  • Two independent poles for line/load.
  • Magnetic hydraulic delay trip curve.
  • Panel mount with push-to-reset actuator.

MU2-B-24-450-1-A21-B-D Applications

  • Overcurrent protection for control panels.
  • Motor branch circuit protection.
  • Power distribution in industrial machinery.
  • Equipment protection in commercial systems.
  • Backup for 250V DC loads.

MU2-B-24-450-1-A21-B-D FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the MU2-B-24-450-1-A21-B-D?

The current rating is 5A at 250V.

What is the voltage rating?

The voltage rating is 250V.

How many poles does this circuit breaker have?

It has 2 poles.

What type of breaker is the MU2-B-24-450-1-A21-B-D?

It is a magnetic hydraulic delay circuit breaker.

What actuator type does it use?

Push-to-reset actuator.

How is the circuit breaker mounted?

Panel mount.

Which safety agencies have approved this breaker?

CCC, CSA, UL, VDE.

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