MU1-B-10-440-1-A21-B-C The Littelfuse Inc. MU1-B-10-440-1-A21-B-C is a single-pole, magnetic hydraulic delay circuit breaker. It features a panel mount design and a push-to-reset actuator.
Mfr Part #:

MU1-B-10-440-1-A21-B-C

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
The Littelfuse Inc. MU1-B-10-440-1-A21-B-C is a single-pole, magnetic hydraulic delay circuit breaker. It features a panel mount design and a push-to-reset actuator.
Stock on Request

MU1-B-10-440-1-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-10-440-1-A21-B-C Description

Short technical summary and product information.

This Littelfuse Inc. MU1-B-10-440-1-A21-B-C is a single-pole circuit breaker designed for panel mounting. It operates with a current rating of 4A and a voltage rating of 250V.

 

The breaker type is magnetic with a hydraulic delay, providing reliable overcurrent protection. The actuator type is push to reset, allowing for easy operation after a trip.

 

Key approvals include CCC, CSA, and UL1077, indicating compliance with various safety standards. The RoHS status is RoHS3 Compliant, and the Moisture Sensitivity Level (MSL) is 1 Unlimited.

MU1-B-10-440-1-A21-B-C Quick Information

Product Type: Circuit Breaker
Series: MU1-B
Canonical Name: Littelfuse Inc. MU1-B-10-440-1-A21-B-C Circuit Breaker
Subcategory: Circuit Breaker

MU1-B-10-440-1-A21-B-C Compliance

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

MU1-B-10-440-1-A21-B-C Features

  • 4A current rating and 250V voltage rating.
  • Magnetic hydraulic delay breaker type.
  • Panel mount with push-to-reset actuator.
  • Approved by CCC, CSA, and UL1077.
  • RoHS3 Compliant and MSL 1.

MU1-B-10-440-1-A21-B-C Applications

  • Suitable for general overcurrent protection.
  • Ideal for panel-mounted applications.
  • Used in systems requiring 250V operation.
  • Designed for 4A circuit protection needs.

MU1-B-10-440-1-A21-B-C FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the MU1-B-10-440-1-A21-B-C circuit breaker?

4A.

What is the voltage rating?

250V.

How many poles does this circuit breaker have?

1 pole.

What type of breaker is the MU1-B-10-440-1-A21-B-C?

Magnetic (hydraulic delay) circuit breaker.

How is the breaker actuated?

Push-to-reset actuator.

What mounting type does this breaker use?

Panel mount.

What approvals does the MU1-B-10-440-1-A21-B-C have?

CCC, CSA, and UL1077.

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