CMB-033-12HNN-B-A Equivalent & Substitute Parts

Part Overview

The CMB-033-12HNN-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 part is RoHS3 compliant and REACH unaffected. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate alternative manufacturers while maintaining equivalent electrical and mechanical specifications.

Substiute Parts

CMB-033-12HNN-B-A

Carling TechnologiesIn Stock: 1082CMB-033-12HNN-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-033-12HNN-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

Parameter Variance:

• Voltage Rating - DC: Substitute parts are rated for 50V DC, exceeding the 32V DC specification of the main part. This represents a higher voltage capability and does not restrict substitution in applications requiring 32V DC or lower.

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 enhanced approval 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-033-12HNN-B-A based on matching electrical and mechanical specifications. Selection among these alternatives may be determined by:

Inventory Availability: Current stock levels range from 869 to 1358 units across the substitute options, compared to 1012 units for the main part.

Compliance Certifications: The main part carries CE, cUL, TUV, UL1077, and UL1500 approvals. All substitute parts maintain cURus, UL 1077, and UL 1500 certifications. Applications requiring specific regional compliance should verify that the substitute part's certification portfolio meets project requirements.

Moisture Sensitivity Level: All substitute parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.

DC Voltage Capability: Substitute parts are rated for 50V DC, providing enhanced capability over the 32V DC specification of the main part. This higher rating does not restrict use in 32V DC applications and may provide additional design margin in systems operating at lower DC voltages.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-033-12HNN-B-A in existing designs?

A: Yes. The CBW57 series substitute parts match all critical electrical parameters: 3A current rating, 250V AC voltage rating, 32V DC or higher voltage capability, single-pole configuration, thermal breaker type, push-to-reset actuation, and panel-mount form factor. Both the main part and all substitutes are active products with RoHS3 compliance and REACH unaffected status.

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' 50V DC rating exceeds the main part's 32V DC specification. A higher voltage rating indicates the component can safely operate at the specified voltage and below. Therefore, substitute parts rated for 50V DC are suitable for applications requiring 32V DC operation.

Q: Are there differences in approval certifications between the main part and substitute parts?

A: The main part carries CE, cUL, TUV, UL1077, and UL1500 certifications. Substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. Both sets include UL 1077 and UL 1500. Applications requiring specific certifications such as CE or TUV should verify that the substitute part's certification meets project requirements before selection.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All five substitute parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity constraints. This matches the handling and storage requirements of the main part.

Q: Are there packaging or quantity differences among the substitute options?

A: All parts are supplied in bulk packaging. Inventory quantities vary: CBW57-EJ-3A (1203 units), CBW57-EL4-3A (1358 units), CBW57-ES-3A (1289 units), CBW57-PF-3A-5X (869 units), and CBW57-PS-3A-1X (1120 units). Selection may be influenced by required order quantities and current stock availability.

Q: What distinguishes the different CBW57 part number variants?

A: The CBW57 base series encompasses multiple variants identified by suffix designations (EJ, EL4, ES, PF-5X, PS-1X). All variants listed share identical electrical specifications and certifications. Suffix variations typically indicate different connector types, terminal configurations, or packaging options specific to OptiFuse's product line structure. Mechanical compatibility should be verified against application requirements.