CMB-033-27GNN-B-A Equivalent & Substitute Parts

Part Overview

The CMB-033-27GNN-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 3A at 250V AC and 32V DC. This single-pole, panel-mount device features push-to-reset actuation and holds active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. The device is RoHS3 compliant and REACH unaffected. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits equivalent functionality.

Substiute Parts

CMB-033-27GNN-B-A

Carling TechnologiesIn Stock: 933CMB-033-27GNN-B-A Datasheet

Current PartRFQ

CBW57-EJ-3A

OptiFuseIn Stock: 1310CBW57-EJ-3A Datasheet

Parametric EquivalentRFQ

CBW57-EL4-3A

OptiFuseIn Stock: 1370CBW57-EL4-3A Datasheet

Parametric EquivalentRFQ

CBW57-ES-3A

OptiFuseIn Stock: 1344CBW57-ES-3A Datasheet

Parametric EquivalentRFQ

CBW57-PF-3A-5X

OptiFuseIn Stock: 938CBW57-PF-3A-5X Datasheet

Parametric EquivalentRFQ

CBW57-PS-3A-1X

OptiFuseIn Stock: 1225CBW57-PS-3A-1X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMB-033-27GNN-B-A are qualified based on the following critical parameters that determine functional equivalence:

Matching Parameters:

• Current Rating: 3A
• Voltage Rating - AC: 250V
• Mounting Type: Panel Mount
• Breaker Type: Thermal
• Actuator Type: Push to Reset
• Number of Poles: 1
• Illumination: None

Allowable Variance:

• Voltage Rating - DC: The main part specifies 32V DC. All substitute parts are rated for 50V DC, which provides higher DC voltage capability and remains compatible with applications requiring 32V DC operation.

All substitute parts are manufactured by OptiFuse under the CBW57 series and maintain active product status with RoHS3 compliance and REACH unaffected status. Substitute parts carry equivalent or expanded approval agency certifications including cURus, IP 40, SAE J1171, UL 1077, and UL 1500.

Parameter Comparison

Engineering Selection Recommendations

All five substitute parts (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X) are qualified equivalents for the CMB-033-27GNN-B-A based on matching electrical and mechanical specifications. Each substitute maintains active product status and full RoHS3 compliance with REACH unaffected designation.

The substitute parts carry regulatory approvals including cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. The main part includes CE, cUL, TUV, UL1077, and UL1500 approvals. Both the main part and all substitutes satisfy UL1077 and UL1500 standards, ensuring compatibility in applications requiring these certifications.

The DC voltage rating differential (32V main versus 50V substitutes) represents an uprated capability in the substitute parts. This higher DC rating does not compromise compatibility in circuits designed for 32V DC operation and provides additional margin for applications with variable DC supply conditions.

All substitute parts are available in bulk packaging with confirmed inventory levels ranging from 869 to 1358 pieces.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-033-27GNN-B-A in existing designs?

A: Yes. The CBW57 series substitute parts match all critical electrical and mechanical parameters: 3A current rating, 250V AC voltage rating, 32V DC compatible operation (rated to 50V DC), panel mount configuration, thermal breaker type, push-to-reset actuation, and single-pole design. Both the main part and substitutes carry UL1077 and UL1500 certifications.

Q: What is the significance of the 50V DC rating on substitute parts versus the 32V DC rating on the main part?

A: The substitute parts are rated for 50V DC, which exceeds the main part's 32V DC specification. This higher rating provides additional voltage margin and does not restrict use in 32V DC applications. The substitute parts remain fully compatible with circuits designed for the CMB-033-27GNN-B-A.

Q: Are all five CBW57 substitute parts electrically identical?

A: All five substitute parts (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X) share identical electrical specifications and regulatory certifications. The part number suffixes indicate different connector or terminal configurations. Selection among these five parts depends on specific panel mount interface requirements and connector type compatibility with the application.

Q: Do the substitute parts meet the same regulatory standards as the main part?

A: Both the main part and all substitute parts carry UL1077 and UL1500 certifications. The main part includes additional CE and TUV approvals. The substitute parts carry cURus, IP 40, and SAE J1171 certifications. All parts maintain RoHS3 compliance and REACH unaffected status.

Q: What inventory considerations apply when selecting between the main part and substitutes?

A: The main part (CMB-033-27GNN-B-A) has 874 pieces in stock. Substitute parts have higher inventory levels: CBW57-EL4-3A (1358 pieces), CBW57-ES-3A (1289 pieces), CBW57-PS-3A-1X (1120 pieces), CBW57-EJ-3A (1203 pieces), and CBW57-PF-3A-5X (869 pieces). Substitute selection may be driven by availability requirements and lead time considerations.

Q: Are there any mechanical mounting differences between the main part and substitute parts?

A: All parts are specified as panel mount with identical actuator type (push to reset) and single-pole configuration. Mechanical compatibility is determined by the specific connector or terminal type, which is indicated in the part number suffix for CBW57 variants. Verify connector type compatibility with the application's panel interface before final selection.