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MU1-B-20-250-1-A11-B-C Littelfuse MU1-B-20-250-1-A11-B-C is a 1 pole magnetic hydraulic delay circuit breaker rated at 500mA and 250V. It features a push-to-reset actuator and panel mount installation.
Mfr Part #:

MU1-B-20-250-1-A11-B-C

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse MU1-B-20-250-1-A11-B-C is a 1 pole magnetic hydraulic delay circuit breaker rated at 500mA and 250V. It features a push-to-reset actuator and panel mount installation.
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MU1-B-20-250-1-A11-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
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MU1-B-20-250-1-A11-B-C Description

Short technical summary and product information.

The Littelfuse MU1-B-20-250-1-A11-B-C is a single pole magnetic hydraulic delay circuit breaker designed for overcurrent protection. It is rated for 500mA continuous current and 250V AC/DC. The hydraulic delay mechanism provides time-delayed tripping to withstand temporary inrush currents without nuisance tripping. The breaker uses a push-to-reset actuator and is designed for panel mount installation. It is approved by CCC, CSA, and UL1077 for safety compliance. This circuit breaker is suitable for applications requiring reliable overcurrent protection in a compact form factor.

MU1-B-20-250-1-A11-B-C Quick Information

Product Type: Circuit Breaker
Series: MU1-B
Canonical Name: Littelfuse MU1 Series 1 Pole 500mA 250V Magnetic Hydraulic Delay Circuit Breaker
Subcategory: Magnetic Circuit Breaker

MU1-B-20-250-1-A11-B-C Compliance

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

MU1-B-20-250-1-A11-B-C Features

  • Rated for 500mA continuous current at 250V.
  • Single pole magnetic hydraulic delay design.
  • Push-to-reset actuator for manual reset.
  • Panel mount installation for easy integration.
  • Approved by CCC, CSA, and UL1077.

MU1-B-20-250-1-A11-B-C Applications

  • Used in power distribution and control panels.
  • Suitable for industrial equipment protection.
  • Ideal for applications requiring time-delay tripping.
  • Works in automotive and marine systems.
  • Compatible with telecom and data center power.

MU1-B-20-250-1-A11-B-C FAQs

7 frequently asked questions generated from this part’s specifications.
What is the voltage rating of the MU1-B-20-250-1-A11-B-C?

250V.

What is the current rating of this circuit breaker?

500mA.

What type of breaker is the MU1-B-20-250-1-A11-B-C?

Magnetic (Hydraulic Delay).

How many poles does this circuit breaker have?

1 pole.

What is the actuator type?

Push to Reset.

What safety approvals does this breaker hold?

CCC, CSA, UL1077.

What is the mounting type for this circuit breaker?

Panel Mount.

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