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AA1-B0-34-620-5D1-C This Littelfuse AA1-B0-34-620-5D1-C is a 20A, 277V, 1-pole magnetic hydraulic delay circuit breaker with a lever actuator for panel mount applications.
Mfr Part #:

AA1-B0-34-620-5D1-C

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
This Littelfuse AA1-B0-34-620-5D1-C is a 20A, 277V, 1-pole magnetic hydraulic delay circuit breaker with a lever actuator for panel mount applications.
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AA1-B0-34-620-5D1-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
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AA1-B0-34-620-5D1-C Description

Short technical summary and product information.

The Littelfuse AA1-B0-34-620-5D1-C is a single-pole magnetic circuit breaker featuring hydraulic delay for time-delayed overcurrent protection. It is rated for 20A continuous current at 277V AC, making it suitable for branch circuit protection in industrial and commercial power distribution systems.

 

The breaker uses a magnetic (hydraulic delay) trip mechanism, which provides predictable and repeatable overcurrent protection. The lever actuator allows for manual on/off control and visible status indication. This unit is designed for panel mount installation and carries approvals from CCC, CSA, and UL, indicating compliance with major international safety standards.

AA1-B0-34-620-5D1-C Quick Information

Product Type: Circuit Breaker
Series: AA1
Canonical Name: AA1-B0-34-620-5D1-C Magnetic (Hydraulic Delay) Circuit Breaker
Subcategory: Magnetic Circuit Breaker

AA1-B0-34-620-5D1-C Compliance

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

AA1-B0-34-620-5D1-C Features

  • 20A current rating for branch circuit protection.
  • 277V AC voltage rating for commercial systems.
  • 1-pole magnetic hydraulic delay trip mechanism.
  • Lever actuator for manual on/off control.
  • Panel mount design for easy installation.

AA1-B0-34-620-5D1-C Applications

  • Used in industrial control panel protection.
  • Suitable for commercial lighting circuit protection.
  • Ideal for HVAC equipment branch circuits.
  • Applied in power distribution sub-panels.

AA1-B0-34-620-5D1-C FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of this circuit breaker?

The current rating is 20A.

What is the voltage rating of this circuit breaker?

The voltage rating is 277V.

What type of breaker is this?

This is a magnetic (hydraulic delay) circuit breaker.

How many poles does this breaker have?

This is a 1-pole circuit breaker.

What type of actuator does this breaker use?

It uses a lever actuator.

What mounting type does this breaker have?

It is designed for panel mount.

What agency approvals does this breaker have?

It is approved by CCC, CSA, and UL.

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