CMB-073-11DNN-B-A Equivalent & Substitute Parts

Part Overview

The CMB-073-11DNN-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 7A at 250V AC and 32V DC. This single-pole, panel-mount device features push-to-reset actuation and holds active product status. The breaker is ROHS3 compliant and carries multiple approval certifications including CE, cUL, TUV, UL1077, and UL1500. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across alternative manufacturers, ensuring functional interchangeability in panel-mount thermal protection applications.

Substiute Parts

CMB-073-11DNN-B-A

Carling TechnologiesIn Stock: 871CMB-073-11DNN-B-A Datasheet

Current PartRFQ

CBW57-EJ-7A

OptiFuseIn Stock: 1957CBW57-EJ-7A Datasheet

Parametric EquivalentRFQ

CBW57-EL4-7A

OptiFuseIn Stock: 2075CBW57-EL4-7A Datasheet

Parametric EquivalentRFQ

CBW57-ES-7A-5H

OptiFuseIn Stock: 2494CBW57-ES-7A-5H Datasheet

Parametric EquivalentRFQ

CBW57-HS-7A-5C

OptiFuseIn Stock: 1288CBW57-HS-7A-5C Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMB-073-11DNN-B-A are qualified based on the following critical parameters:

Electrical Equivalence:

• Current Rating: 7A (exact match required)
• Voltage Rating - AC: 250V (exact match required)
• Voltage Rating - DC: Minimum 32V (substitutes rated at 50V DC exceed minimum requirement)

Mechanical Equivalence:

• Breaker Type: Thermal (exact match required)
• Mounting Type: Panel Mount (exact match required)
• Actuator Type: Push to Reset (exact match required)
• Number of Poles: 1 (exact match required)

Compliance Equivalence:

• RoHS3 Compliant status (exact match required)
• Active product status (exact match required)

All four substitute parts from OptiFuse (CBW57 series) meet these criteria. The DC voltage rating differential (50V versus 32V) represents an upgrade in DC capability and does not restrict substitution in applications requiring 32V DC operation.

Parameter Comparison

Engineering Selection Recommendations

All four OptiFuse CBW57 series substitutes maintain active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with the original CMB-073-11DNN-B-A.

Approval Agency Considerations:

The CMB-073-11DNN-B-A carries certifications: CE, cUL, TUV, UL1077, UL1500.

The OptiFuse CBW57 substitutes carry certifications: cURus, IP 40, SAE J1171, UL 1077, UL 1500.

Both part families include UL 1077 and UL 1500 approvals. The OptiFuse parts include cURus (combined Canadian and US recognition) and IP 40 environmental protection rating. Applications requiring specific certification alignment should verify that the substitute's approval portfolio meets system-level requirements.

Inventory Availability:

CBW57-ES-7A-5H: 2482 units in stock CBW57-EL4-7A: 1998 units in stock CBW57-HS-7A-5C: 1197 units in stock CBW57-EJ-7A: 1884 units in stock CMB-073-11DNN-B-A: 810 units in stock

DC Voltage Rating:

All OptiFuse substitutes are rated for 50V DC, exceeding the 32V DC requirement of the original part. This represents enhanced capability and does not restrict application in 32V DC circuits.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-073-11DNN-B-A in existing designs?

A: Yes. All four CBW57 variants match the critical electrical parameters (7A, 250V AC), mechanical configuration (panel mount, single pole, push-to-reset), and compliance status (ROHS3, active product). Physical form factor compatibility must be verified through mechanical drawings, as this information is not provided in the parametric data.

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

A: The 50V DC rating on CBW57 substitutes exceeds the 32V DC requirement. In applications operating at or below 32V DC, the higher rating presents no limitation and provides additional margin. Applications requiring operation above 32V DC but within 50V DC benefit from the enhanced rating.

Q: Are there differences in thermal response characteristics between the CMB-073-11DNN-B-A and CBW57 substitutes?

A: Thermal response time and trip characteristics are not provided in the parametric data. Applications with specific thermal response requirements should obtain detailed thermal curves from manufacturer datasheets before final selection.

Q: Which OptiFuse CBW57 variant should be selected if all are electrically equivalent?

A: All four variants (CBW57-EJ-7A, CBW57-EL4-7A, CBW57-ES-7A-5H, CBW57-HS-7A-5C) are parametrically equivalent. Selection may be based on inventory availability, lead time, or specific mechanical connector configurations indicated by the part number suffix. CBW57-ES-7A-5H offers the highest current inventory level at 2482 units.

Q: Do the approval agency differences affect substitution validity?

A: Both the original and substitute parts carry UL 1077 and UL 1500 approvals. The OptiFuse parts include additional certifications (cURus, IP 40, SAE J1171). System-level certification requirements should be reviewed to confirm that the substitute's approval portfolio satisfies application-specific standards.

Q: Is the Moisture Sensitivity Level (MSL) rating of the OptiFuse parts relevant to substitution?

A: The OptiFuse CBW57 parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. This does not affect functional substitution but may influence supply chain logistics and storage requirements.