AA1-B2-12-640-521-MK The AA1-B2-12-640-521-MK is a circuit breaker manufactured by Littelfuse Inc. with a current rating of 40A and voltage rating of 277V. It features a panel mount and lever actuator.
Mfr Part #:

AA1-B2-12-640-521-MK

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
The AA1-B2-12-640-521-MK is a circuit breaker manufactured by Littelfuse Inc. with a current rating of 40A and voltage rating of 277V. It features a panel mount and lever actuator.
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$ Price Range: $0.99

AA1-B2-12-640-521-MK 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

AA1-B2-12-640-521-MK Description

Short technical summary and product information.

This circuit breaker, part number AA1-B2-12-640-521-MK, is produced by Littelfuse Inc. and falls under the category of circuit protection devices. It is designed with a current rating of 40 amperes and a voltage rating of 277 volts. The breaker employs a magnetic hydraulic delay mechanism, suitable for protecting electrical circuits from overloads and short circuits. Its mounting type is panel mount, making it suitable for installation in control panels and distribution boards. The actuator type is a lever, providing ease of operation. It features a single pole configuration and does not include illumination features. This component is used in electrical systems requiring reliable circuit interruption and protection.

AA1-B2-12-640-521-MK Quick Information

Product Type: Circuit Breaker
Canonical Name: Circuit Breaker AA1-B2-12-640-521-MK

AA1-B2-12-640-521-MK Compliance

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

AA1-B2-12-640-521-MK Estimated Pricing

Qty Low High
1+ $0.99 $0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

AA1-B2-12-640-521-MK Features

  • Rated for 40A current
  • Voltage rating of 277V
  • Panel mount installation
  • Magnetic hydraulic delay breaker
  • Single pole configuration

AA1-B2-12-640-521-MK Applications

  • Used in electrical distribution panels
  • Protects circuits from overloads
  • Suitable for industrial control systems
  • Installed in control cabinets

AA1-B2-12-640-521-MK FAQs

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

The voltage rating is 277V.

What is the current rating of the circuit breaker?

The current rating is 40A.

What mounting type does this circuit breaker use?

It uses panel mount.

What type of breaker is this?

It is a magnetic (hydraulic delay) breaker.

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The Littelfuse Inc. AT1-B2-14-640-521-MK is a magnetic circuit breaker with a 40A current rating and 277V voltage rating. It features a panel mount design and a lever actuator.
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