AA1-B0-24-490-2B1-C Littelfuse AA1-B0-24-490-2B1-C is a 9A, 277V, 1-pole magnetic hydraulic delay circuit breaker with panel mount and lever actuator.
Mfr Part #:

AA1-B0-24-490-2B1-C

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse AA1-B0-24-490-2B1-C is a 9A, 277V, 1-pole magnetic hydraulic delay circuit breaker with panel mount and lever actuator.
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AA1-B0-24-490-2B1-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
SVHC Present
Voltage Rating

AA1-B0-24-490-2B1-C Description

Short technical summary and product information.

The Littelfuse AA1-B0-24-490-2B1-C is a single-pole magnetic hydraulic delay circuit breaker rated for 9A at 277V. It features a lever actuator and panel mount design. The magnetic hydraulic delay mechanism provides reliable overcurrent protection with time-delay characteristics suitable for applications with inrush currents. This circuit breaker is approved by CCC, CSA, and UL, ensuring compliance with international standards. It is designed for use in various industrial and commercial power distribution systems where dependable circuit protection is required.

AA1-B0-24-490-2B1-C Quick Information

Product Type: Circuit Breaker
Canonical Name: Littelfuse AA1-B0-24-490-2B1-C 9A 277V 1-Pole Magnetic Hydraulic Delay Circuit Breaker
Subcategory: Magnetic (Hydraulic Delay) Circuit Breaker

AA1-B0-24-490-2B1-C Compliance

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

AA1-B0-24-490-2B1-C Features

  • Rated for 9A at 277V operation.
  • Single-pole magnetic hydraulic delay design.
  • Panel mount with lever actuator.
  • Approved by CCC, CSA, and UL.
  • No illumination — non-illuminated lever.

AA1-B0-24-490-2B1-C Applications

  • Used in industrial power distribution panels.
  • Suitable for commercial building circuit protection.
  • Ideal for equipment requiring time-delay overcurrent protection.
  • Applicable in control panels and switchgear.

AA1-B0-24-490-2B1-C FAQs

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

9A.

What is the voltage rating?

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 is the actuator type?

Lever.

What approvals does this circuit breaker have?

CCC, CSA, UL.

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