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AA1-B0-21-450-1A2-C The AA1-B0-21-450-1A2-C is a 5A, 277V, single-pole magnetic hydraulic delay circuit breaker from Littelfuse, designed for panel mount with lever actuator.
Mfr Part #:

AA1-B0-21-450-1A2-C

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
The AA1-B0-21-450-1A2-C is a 5A, 277V, single-pole magnetic hydraulic delay circuit breaker from Littelfuse, designed for panel mount with lever actuator.
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AA1-B0-21-450-1A2-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-B0-21-450-1A2-C Description

Short technical summary and product information.

The AA1-B0-21-450-1A2-C is a single-pole magnetic hydraulic delay circuit breaker from Littelfuse Inc. It is rated for a continuous current of 5A at 277V AC. The hydraulic delay mechanism provides time-delayed overcurrent protection, reducing nuisance tripping while ensuring reliable fault interruption. This breaker features a panel mount design with a lever actuator for manual on/off control. It is approved by UL, CSA, and CCC, making it suitable for a wide range of industrial and commercial applications. The unit has no illumination and is designed for straightforward installation in standard panel cutouts.

AA1-B0-21-450-1A2-C Quick Information

Product Type: Circuit Breaker
Canonical Name: AA1-B0-21-450-1A2-C Magnetic (Hydraulic Delay) Circuit Breaker, 5A, 277V, 1 Pole, Panel Mount, Lever Actuator
Subcategory: Magnetic (Hydraulic Delay) Circuit Breaker

AA1-B0-21-450-1A2-C Compliance

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

AA1-B0-21-450-1A2-C Features

  • Magnetic hydraulic delay trip mechanism.
  • Rated for 5A at 277V AC continuous.
  • Single pole for panel mount installation.
  • Lever actuator for manual on/off control.
  • UL, CSA, and CCC agency approved.

AA1-B0-21-450-1A2-C Applications

  • Panel mount circuit protection applications
  • Overcurrent protection for 277V lighting circuits
  • Hydraulic-magnetic breaker for industrial control panels
  • Single-pole branch circuit protection
  • UL/CSA/CCC approved equipment protection

AA1-B0-21-450-1A2-C FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the AA1-B0-21-450-1A2-C?

5A.

What is the voltage rating of this circuit breaker?

277V.

What type of circuit breaker is the AA1-B0-21-450-1A2-C?

Magnetic (Hydraulic Delay) circuit breaker.

How many poles does this circuit breaker have?

1 pole.

What is the mounting type for this circuit breaker?

Panel mount.

What actuator type does this circuit breaker use?

Lever actuator.

What agency approvals does the AA1-B0-21-450-1A2-C have?

CCC, CSA, UL approvals.

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