CMB-073-00ENN-B-A Equivalent & Substitute Parts

Part Overview

The CMB-073-00ENN-B-A is a thermal circuit breaker manufactured by Carling Technologies, designed for panel mount applications. This single-pole device provides overcurrent protection at 7A with dual voltage ratings of 250V AC and 32V DC. The push-to-reset actuator enables manual circuit restoration after thermal trip events. The part maintains Active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are identified to address inventory availability, extended lead times, or supply chain requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

CMB-073-00ENN-B-A

Carling TechnologiesIn Stock: 843CMB-073-00ENN-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 CMB-073-00ENN-B-A are qualified based on strict parameter alignment. All substitute candidates share identical electrical characteristics: 7A current rating, 250V AC voltage rating, push-to-reset actuator configuration, single-pole topology, and panel mount form factor. All substitutes are manufactured by OptiFuse under the CBW57 series base product number.

The critical substitution parameters are:

• Current Rating (Amps): 7A
• Voltage Rating - AC: 250V
• Mounting Type: Panel Mount
• Breaker Type: Thermal
• Actuator Type: Push to Reset
• Number of Poles: 1
• RoHS Status: ROHS3 Compliant

All four substitute part numbers (CBW57-HS-7A-5C, CBW57-ES-7A-5H, CBW57-EJ-7A, CBW57-EL4-7A) meet these core requirements and are therefore electrically and mechanically interchangeable with the main part.

Parameter Comparison

Engineering Selection Recommendations

All four OptiFuse CBW57 series substitutes are qualified for direct replacement of the CMB-073-00ENN-B-A based on matching electrical specifications and Active product status. The substitutes maintain identical current rating (7A), AC voltage rating (250V), mounting configuration (panel mount), and actuator function (push to reset).

The DC voltage rating differential (32V for CMB-073-00ENN-B-A versus 50V for all CBW57 substitutes) represents an uprated specification on the substitute parts. This higher DC rating does not compromise compatibility in applications operating at or below 32V DC, as the substitute parts are rated for the full 50V DC range.

All substitute parts carry ROHS3 compliance and EAR99 export classification, matching the regulatory posture of the original part. OptiFuse CBW57 series parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals, providing equivalent functional certification coverage.

Selection among the four substitute options may be based on inventory availability and lead time requirements. CBW57-ES-7A-5H offers the highest inventory level (2482 pcs), followed by CBW57-EL4-7A (1998 pcs), CBW57-EJ-7A (1884 pcs), and CBW57-HS-7A-5C (1197 pcs).

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace CMB-073-00ENN-B-A in existing applications?

A: Yes. All four CBW57 substitutes share identical current rating (7A), AC voltage rating (250V), mounting type (panel mount), actuator type (push to reset), and pole configuration (single pole). These are the critical parameters determining electrical and mechanical compatibility.

Q: What is the significance of the DC voltage rating difference (32V vs. 50V)?

A: The substitute parts carry a higher DC voltage rating (50V) compared to the original part (32V). This represents an uprated specification. In applications operating at 32V DC or lower, the 50V-rated substitutes are fully compatible and provide additional voltage margin.

Q: Are all four CBW57 substitutes electrically identical?

A: Yes. CBW57-HS-7A-5C, CBW57-ES-7A-5H, CBW57-EJ-7A, and CBW57-EL4-7A share identical electrical parameters: 7A current rating, 250V AC, 50V DC, thermal breaker type, push-to-reset actuator, and single-pole configuration. Differences in part number suffixes reflect manufacturing or packaging variations within the OptiFuse CBW57 series.

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

A: The substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. The original part carries CE, cUL, TUV, UL1077, and UL1500 certifications. Both sets include UL1077 and UL1500 standards. The substitute parts provide equivalent functional certification for thermal circuit breaker applications.

Q: Which substitute part should be selected if multiple options are available?

A: Selection may be based on inventory availability and procurement lead time. CBW57-ES-7A-5H has the highest inventory (2482 pcs), followed by CBW57-EL4-7A (1998 pcs). All four parts are electrically and mechanically equivalent.

Q: Are the substitute parts RoHS compliant?

A: Yes. All four CBW57 substitutes are ROHS3 compliant, matching the compliance status of the original CMB-073-00ENN-B-A part.

Q: What is the Moisture Sensitivity Level (MSL) of the substitute parts?

A: All four CBW57 substitutes carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.