CB123-40B The Eaton CB123-40B is a 40A, 28V automotive circuit breaker with a push-to-reset actuator. It is a heavy-duty, type III breaker.
Mfr Part #:

CB123-40B

Mfr Name: Eaton - Electronics Division
Eaton - Electronics Division
The Eaton CB123-40B is a 40A, 28V automotive circuit breaker with a push-to-reset actuator. It is a heavy-duty, type III breaker.
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CB123-40B Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Actuator Type
Current Rating
Current Rating (Amps)
Mounting Type
Number of Poles
SVHC Present
Voltage Rating

CB123-40B Description

Short technical summary and product information.

This Eaton CB123-40B is a single-pole automotive circuit breaker designed for heavy-duty applications. It features a current rating of 40A and a voltage rating of 28V.

 

The breaker is equipped with a push-to-reset actuator for easy operation. It is classified as a Type III heavy-duty breaker, suitable for demanding automotive environments. The mounting type is chassis mount, allowing for secure installation.

 

Additional specifications include an interrupting capacity of 1.5 kAIC at 12 Vdc. The RoHS status is reported as RoHS3 Compliant, and the Moisture Sensitivity Level (MSL) is 1 Unlimited. REACH status is listed as REACH Unaffected.

 

This circuit breaker is part of the Eaton CB123-B series, offering reliable protection for automotive electrical systems.

CB123-40B Quick Information

Product Type: Circuit Breaker
Series: CB123-B
Canonical Name: Eaton CB123-40B Automotive Circuit Breaker

CB123-40B Compliance

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

CB123-40B Features

  • 40A current rating for robust protection.
  • 28V voltage rating for automotive use.
  • Push-to-reset actuator for convenience.
  • Chassis mount for secure installation.
  • Heavy-duty Type III classification.

CB123-40B Applications

  • Automotive circuit protection for 12V systems.
  • Heavy-duty overcurrent protection for DC circuits.
  • Battery and alternator protection in vehicles.
  • Push-to-reset breaker for manual reset applications.

CB123-40B FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the Eaton CB123-40B circuit breaker?

The Eaton CB123-40B circuit breaker has a current rating of 40A.

What is the voltage rating for the Eaton CB123-40B circuit breaker?

The voltage rating for the Eaton CB123-40B circuit breaker is 28V.

How is the Eaton CB123-40B circuit breaker reset?

The Eaton CB123-40B circuit breaker features a push-to-reset actuator.

What type of mounting does the CB123-40B circuit breaker use?

The CB123-40B circuit breaker uses chassis mount.

What is the interrupting capacity of the Eaton CB123-40B at 12 Vdc?

The interrupting capacity of the Eaton CB123-40B at 12 Vdc is 1.5 kAIC.

What is the RoHS status of the Eaton CB123-40B circuit breaker?

The RoHS status of the Eaton CB123-40B circuit breaker is RoHS3 Compliant.

What is the Moisture Sensitivity Level (MSL) for the Eaton CB123-40B?

The Moisture Sensitivity Level (MSL) for the Eaton CB123-40B is 1 Unlimited.

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