MU1-B-34-450-3-A21-B-C Littelfuse MU1-B-34-450-3-A21-B-C is a 5A, 250V single pole magnetic (hydraulic delay) circuit breaker with push-to-reset actuator and panel mount.
Mfr Part #:

MU1-B-34-450-3-A21-B-C

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse MU1-B-34-450-3-A21-B-C is a 5A, 250V single pole magnetic (hydraulic delay) circuit breaker with push-to-reset actuator and panel mount.
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MU1-B-34-450-3-A21-B-C 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
Voltage Rating

MU1-B-34-450-3-A21-B-C Description

Short technical summary and product information.

The Littelfuse MU1-B-34-450-3-A21-B-C is a single pole magnetic (hydraulic delay) circuit breaker rated for 5A at 250V. It features a push-to-reset actuator and is designed for panel mount installation. The magnetic hydraulic delay mechanism provides precise overcurrent protection with time delay characteristics suited for systems with transient inrush currents.

 

This breaker carries approvals from CCC, CSA, and UL1077, making it suitable for a wide range of applications requiring recognized safety standards. The non-illuminated, compact design allows for straightforward integration into control panels and equipment enclosures.

 

The panel mount configuration simplifies installation in cutout-panel applications, and the push-to-reset actuator enables easy manual reset after a trip event. With a single pole configuration, it is intended for branch circuit protection in AC or DC systems up to the rated voltage.

MU1-B-34-450-3-A21-B-C Quick Information

Product Type: Magnetic (Hydraulic Delay) Circuit Breaker
Series: MU1-B
Canonical Name: Littelfuse MU1 Series Magnetic (Hydraulic Delay) Circuit Breaker, 5A, 250V, 1 Pole, Push-to-Reset, Panel Mount
Subcategory: Magnetic (Hydraulic Delay) Circuit Breaker

MU1-B-34-450-3-A21-B-C Compliance

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

MU1-B-34-450-3-A21-B-C Features

  • Rated 5A at 250V operation.
  • Magnetic hydraulic delay breaker type.
  • Single pole panel mount design.
  • Push-to-reset actuator mechanism.
  • CCC, CSA, UL1077 agency approvals.

MU1-B-34-450-3-A21-B-C Applications

  • Overcurrent protection in power supplies.
  • Industrial control panel protection.
  • Branch circuit protection in machinery.
  • Equipment protection in transportation.

MU1-B-34-450-3-A21-B-C FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the Littelfuse MU1-B-34-450-3-A21-B-C?

5A.

What is the voltage rating of this circuit breaker?

250V.

What type of circuit breaker is the MU1-B-34-450-3-A21-B-C?

Magnetic (Hydraulic Delay) circuit breaker.

How many poles does this breaker have?

1 pole.

What type of actuator does this circuit breaker use?

Push-to-reset actuator.

What is the mounting style of this part?

Panel mount.

Which agency approvals does the MU1-B-34-450-3-A21-B-C carry?

CCC, CSA, and UL1077 approvals.

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