CMB-043-27GNN-B-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CMB-043-27GNN-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 4A at 250V AC and 32V DC. This single-pole, panel-mount breaker features push-to-reset actuation and is designed for overcurrent protection in low-voltage DC and AC applications. The part maintains Active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are identified when equivalent electrical and mechanical parameters are required for component replacement, inventory optimization, or supply chain continuity.

Substiute Parts

CMB-043-27GNN-B-A

Carling TechnologiesIn Stock: 1166CMB-043-27GNN-B-A Datasheet

Current PartRFQ

CBW57-EJ-4A

OptiFuseIn Stock: 1289CBW57-EJ-4A Datasheet

Parametric EquivalentRFQ

CBW57-ES-4A

OptiFuseIn Stock: 2935CBW57-ES-4A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMB-043-27GNN-B-A are identified based on strict electrical and mechanical parameter matching. The critical substitution criteria are:

Mandatory Matching Parameters:

• Current Rating: 4A
• Voltage Rating - AC: 250V
• Breaker Type: Thermal
• Mounting Type: Panel Mount
• Actuator Type: Push to Reset
• Number of Poles: 1
• RoHS Compliance: ROHS3 Compliant

Allowable Variation:

• Voltage Rating - DC: The main part specifies 32V DC. Substitute parts with higher DC voltage ratings (50V DC) are acceptable, as they provide equivalent or superior performance in DC applications within the specified range.

The identified substitutes CBW57-ES-4A and CBW57-EJ-4A, both manufactured by OptiFuse, meet all mandatory matching parameters and maintain compliance with applicable standards.

Parameter Comparison

Engineering Selection Recommendations

Both CBW57-ES-4A and CBW57-EJ-4A are qualified substitutes for the CMB-043-27GNN-B-A based on electrical and mechanical equivalence. Selection between these options is determined by availability and supply chain requirements:

CBW57-ES-4A (OptiFuse): 2,895 units in stock. Holds REACH Unaffected status and complies with cURus, IP 40, SAE J1171, UL 1077, and UL 1500 standards.

CBW57-EJ-4A (OptiFuse): 1,273 units in stock. Complies with cURus, IP 40, SAE J1171, UL 1077, and UL 1500 standards with MSL rating of 1 (Unlimited).

Both parts exceed the DC voltage requirement of the original specification (50V DC versus 32V DC requirement), ensuring functional compatibility in all applications where the CMB-043-27GNN-B-A is deployed. All three parts carry ROHS3 compliance and maintain Active product status.

Frequently Asked Questions (FAQ)

Q: Can CBW57-ES-4A and CBW57-EJ-4A be used interchangeably with CMB-043-27GNN-B-A?

A: Yes. Both OptiFuse parts meet all mandatory electrical and mechanical parameters: 4A current rating, 250V AC voltage rating, thermal breaker type, panel mount configuration, push-to-reset actuation, and single-pole design. The higher DC voltage rating (50V versus 32V) provides equivalent or superior performance.

Q: What is the significance of the higher DC voltage rating on the substitute parts?

A: The substitute parts are rated for 50V DC compared to the original 32V DC specification. This higher rating ensures the substitute parts function correctly in all applications where the original part operates, as they can safely handle the specified 32V DC requirement and beyond.

Q: Are there compliance differences between the main part and substitutes?

A: The main part carries CE, cUL, TUV, UL1077, and UL1500 approvals. The substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. Both sets of substitutes maintain UL 1077 and UL 1500 compliance, which are the primary thermal circuit breaker standards. Verify specific compliance requirements for your application.

Q: What is the difference between CBW57-ES-4A and CBW57-EJ-4A?

A: Both parts share identical electrical and mechanical specifications. The primary difference is inventory availability: CBW57-ES-4A has 2,895 units in stock, while CBW57-EJ-4A has 1,273 units. CBW57-EJ-4A includes an explicit MSL rating of 1 (Unlimited).

Q: Are all three parts ROHS3 compliant?

A: Yes. The CMB-043-27GNN-B-A, CBW57-ES-4A, and CBW57-EJ-4A are all ROHS3 compliant, meeting environmental and hazardous substance restrictions.

Q: What packaging format is available for these parts?

A: All three parts are supplied in Bulk packaging format.