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AA1-B0-44-620-5B1-C Littelfuse AA1-B0-44-620-5B1-C is a 20A, 277V, 1-pole magnetic (hydraulic delay) circuit breaker with panel mount and lever actuator.
Mfr Part #:

AA1-B0-44-620-5B1-C

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse AA1-B0-44-620-5B1-C is a 20A, 277V, 1-pole magnetic (hydraulic delay) circuit breaker with panel mount and lever actuator.
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AA1-B0-44-620-5B1-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-B0-44-620-5B1-C Description

Short technical summary and product information.

The Littelfuse AA1-B0-44-620-5B1-C is a single-pole magnetic circuit breaker featuring hydraulic delay for overcurrent protection. It is rated for 20A continuous current at 277V AC. The breaker uses a magnetic (hydraulic delay) mechanism, providing reliable trip characteristics for various applications. It is designed for panel mount installation and is operated via a lever actuator. This circuit breaker is non-illuminated and carries approvals from CCC, CSA, and UL, ensuring compliance with international safety standards. Its compact 1-pole design makes it suitable for protecting branch circuits in industrial and commercial power distribution systems.

AA1-B0-44-620-5B1-C Quick Information

Product Type: Circuit Breaker
Canonical Name: Littelfuse AA1-B0-44-620-5B1-C 20A 277V 1-Pole Magnetic (Hydraulic Delay) Circuit Breaker
Subcategory: Magnetic Circuit Breaker

AA1-B0-44-620-5B1-C Compliance

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

AA1-B0-44-620-5B1-C Features

  • 20A current rating for branch circuit protection.
  • 277V AC voltage rating for commercial applications.
  • Magnetic hydraulic delay trip mechanism.
  • Single-pole design for 1-phase circuits.
  • Panel mount with lever actuator for easy operation.

AA1-B0-44-620-5B1-C Applications

  • Protect lighting and power distribution circuits.
  • Use in industrial control panels and switchgear.
  • Suitable for commercial building electrical systems.
  • Ideal for overcurrent protection in HVAC equipment.

AA1-B0-44-620-5B1-C FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the AA1-B0-44-620-5B1-C?

20A.

What is the operating voltage of this circuit breaker?

277V.

What type of circuit breaker is this?

Magnetic (Hydraulic Delay).

How many poles does it have?

1 pole.

What is the mounting type?

Panel Mount.

What actuator type does it use?

Lever.

What approvals does it have?

CCC, CSA, UL.

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