CMB-033-11CNN-B-A/03 Equivalent & Substitute Parts

Part Overview

The CMB-033-11CNN-B-A/03 is a single-pole thermal circuit breaker manufactured by Carling Technologies, rated for 3A at 250V AC and 32V DC. This component is designed for panel mount applications with push-to-reset actuation and carries Active product status. The part is ROHS3 compliant and holds multiple regulatory approvals including CE, cUL, TUV, UL1077, and UL1500. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate component alternatives that maintain equivalent electrical and mechanical specifications.

Substiute Parts

CMB-033-11CNN-B-A/03

Carling TechnologiesIn Stock: 1141CMB-033-11CNN-B-A/03 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

Substitution eligibility for the CMB-033-11CNN-B-A/03 is determined by the following critical parameters: current rating of 3A, AC voltage rating of 250V, DC voltage rating of 32V or higher, thermal breaker type, single-pole configuration, panel mount form factor, and push-to-reset actuation mechanism. All identified substitute parts from OptiFuse maintain these core electrical and mechanical specifications. The substitute parts operate at 50V DC, which exceeds the 32V DC requirement of the main part and is therefore compatible. All substitute parts retain the same breaker type, current rating, AC voltage rating, mounting configuration, actuator type, and pole count. Regulatory compliance and RoHS status are maintained across all alternatives.

Parameter Comparison

Engineering Selection Recommendations

All five OptiFuse CBW57 series substitute parts are Active status components with ROHS3 compliance and REACH Unaffected designation, matching the regulatory posture of the primary CMB-033-11CNN-B-A/03 part. The substitute parts carry regulatory approvals including cURus, UL 1077, and UL 1500, which overlap with the primary part's approval agencies. The DC voltage rating of 50V on all substitute parts provides operational margin above the 32V DC specification of the main part, ensuring compatibility in applications operating at or below 32V DC. All substitute parts are available in bulk packaging with inventory levels ranging from 869 to 1358 pieces. Selection among the five substitute options may be based on inventory availability, lead time requirements, or specific application packaging needs, as all maintain identical electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-033-11CNN-B-A/03 in existing applications?

A: Yes. All five CBW57 substitute parts maintain the same current rating (3A), AC voltage rating (250V), thermal breaker type, single-pole configuration, panel mount form factor, and push-to-reset actuation. The 50V DC rating of the CBW57 parts exceeds the 32V DC requirement, ensuring compatibility in applications operating at or below 32V DC.

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

A: The CBW57 series parts are rated for 50V DC compared to the 32V DC rating of the CMB-033-11CNN-B-A/03. This higher rating provides operational margin and ensures the substitute parts function correctly in applications requiring 32V DC or lower. A higher voltage rating does not create incompatibility in lower voltage applications.

Q: Are all five CBW57 variants electrically equivalent?

A: Yes. CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X all share identical electrical specifications: 3A current rating, 250V AC, 50V DC, thermal operation, single-pole, and push-to-reset actuation. Differences in part number suffixes reflect packaging or mechanical variants rather than electrical performance.

Q: Do the substitute parts carry equivalent regulatory approvals?

A: The substitute parts carry regulatory approvals including cURus, UL 1077, and UL 1500, which align with the primary part's approval agencies. Both the primary and substitute parts are ROHS3 compliant and REACH Unaffected, maintaining equivalent regulatory status.

Q: What inventory levels are available for the substitute parts?

A: Inventory availability for substitute parts ranges from 869 to 1358 pieces in bulk packaging. CBW57-EL4-3A has the highest inventory at 1358 pieces, while CBW57-PF-3A-5X has the lowest at 869 pieces.

Q: Can the substitute parts be used interchangeably in the same circuit design?

A: Yes. All substitute parts maintain the same electrical and mechanical specifications as the primary part, including current rating, voltage ratings, breaker type, mounting configuration, and actuation mechanism. They are suitable for direct substitution in circuit designs specified for the CMB-033-11CNN-B-A/03.