CMB-033-27G6N-B-A Equivalent & Substitute Parts

Part Overview

The CMB-033-27G6N-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. The part is ROHS3 compliant and carries multiple approval agencies including CE, cUL, TUV, UL1077, and UL1500. Substitute parts are identified when equivalent electrical and mechanical parameters are required for applications where the original part is unavailable or when design specifications allow for alternative manufacturers meeting identical functional requirements.

Substiute Parts

CMB-033-27G6N-B-A

Carling TechnologiesIn Stock: 1109CMB-033-27G6N-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-033-27G6N-B-A are qualified based on the following critical parameters that must match or exceed the original specification:

Matching Parameters (Required for Substitution):

• Breaker Type: Thermal
• Current Rating: 3A
• Voltage Rating - AC: 250V
• Mounting Type: Panel Mount
• Actuator Type: Push to Reset
• Number of Poles: 1
• RoHS Compliance: ROHS3 Compliant

Allowable Variance:

• Voltage Rating - DC: The original part specifies 32V DC. Substitute parts rated at 50V DC are acceptable as this represents a higher voltage capability, maintaining backward compatibility with the original specification.

All identified substitute parts are manufactured by OptiFuse under the CBW57 series and meet these criteria. Each substitute maintains thermal breaker functionality, identical current and AC voltage ratings, panel-mount configuration, and push-to-reset operation.

Parameter Comparison

Engineering Selection Recommendations

All five OptiFuse CBW57 series substitute parts maintain Active product status and full ROHS3 compliance with REACH Unaffected designation, ensuring regulatory alignment with the original CMB-033-27G6N-B-A. The substitute parts carry approval agencies including cURus, IP 40, SAE J1171, UL 1077, and UL 1500, providing equivalent or overlapping certification coverage with the original part's CE, cUL, TUV, UL1077, and UL1500 approvals.

The primary technical distinction between the original and substitute parts is the DC voltage rating: the original CMB-033-27G6N-B-A is rated for 32V DC, while all OptiFuse substitutes are rated for 50V DC. This higher DC rating in the substitute parts does not create incompatibility; rather, it extends the operational envelope for DC applications. Applications operating at or below 32V DC will function identically with either the original or substitute parts.

All substitute parts are available in bulk packaging with inventory levels ranging from 869 to 1358 pieces, compared to 1057 pieces for the original part. Selection among the five substitute options should be based on internal part numbering conventions, supply chain preferences, or specific connector/terminal configurations indicated by the suffix designations (EJ, EL4, ES, PF-5X, PS-1X).

Frequently Asked Questions (FAQ)

Q: Can OptiFuse CBW57 series parts directly replace the Carling CMB-033-27G6N-B-A?

A: Yes. All five OptiFuse CBW57 variants (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X) are parametric equivalents. They share identical current ratings (3A), AC voltage ratings (250V), mounting configuration (panel mount), actuation method (push to reset), pole count (1), and regulatory compliance status (ROHS3, REACH Unaffected, Active product status).

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

A: The substitute parts are rated for 50V DC, which is higher than the original 32V DC specification. This represents an expanded capability. Applications using 32V DC or lower will operate within the rated envelope of both the original and substitute parts. The higher DC rating does not introduce incompatibility.

Q: Are there differences among the five OptiFuse substitute part numbers?

A: The five OptiFuse parts (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X) share identical electrical and mechanical specifications. The suffix designations (EJ, EL4, ES, PF-5X, PS-1X) indicate variations in connector type, terminal configuration, or packaging format. Selection should be based on mechanical interface requirements and internal part numbering systems.

Q: Do the substitute parts carry the same certifications as the original?

A: The substitute parts carry overlapping but not identical certifications. The original CMB-033-27G6N-B-A holds CE, cUL, TUV, UL1077, and UL1500 approvals. The OptiFuse substitutes carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. Both sets include UL 1077 and UL 1500. Applications requiring specific certifications should verify that the substitute part's approval agency list meets the application's regulatory requirements.

Q: What is the inventory status of substitute parts?

A: All five OptiFuse substitute parts are in stock with Active product status. Inventory levels are: CBW57-EJ-3A (1203 pcs), CBW57-EL4-3A (1358 pcs), CBW57-ES-3A (1289 pcs), CBW57-PF-3A-5X (869 pcs), and CBW57-PS-3A-1X (1120 pcs). These levels exceed the original part's inventory of 1057 pieces.

Q: Can I use these parts interchangeably in the same application?

A: Yes, within the scope of the specified electrical and mechanical parameters. All parts are single-pole, 3A thermal circuit breakers with 250V AC rating, panel-mount configuration, and push-to-reset actuation. The 50V DC rating of substitutes accommodates applications at or below 32V DC. Mechanical fit must be verified based on the specific connector or terminal type indicated by each part's suffix designation.