CMB-063-00ENN-B-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CMB-063-00ENN-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 6A at 250V AC and 32V DC. This single-pole, panel-mount breaker features push-to-reset actuation and is designed for overcurrent protection in low-voltage applications. The part maintains active product status with full compliance to RoHS3 and REACH regulations. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate component alternatives with equivalent electrical and mechanical specifications.

Substiute Parts

CMB-063-00ENN-B-A

Carling TechnologiesIn Stock: 1067CMB-063-00ENN-B-A Datasheet

Current PartRFQ

CBW57-EJ-6A

OptiFuseIn Stock: 1462CBW57-EJ-6A Datasheet

Parametric EquivalentRFQ

CBW57-EL4-6A

OptiFuseIn Stock: 1447CBW57-EL4-6A Datasheet

Parametric EquivalentRFQ

CBW57-ES-6A

OptiFuseIn Stock: 2941CBW57-ES-6A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMB-063-00ENN-B-A are identified based on strict equivalence of the following critical parameters:

Electrical Equivalence Criteria:

• Current Rating: 6A (exact match required)
• Voltage Rating - AC: 250V (exact match required)
• Number of Poles: 1 (exact match required)

Mechanical Equivalence Criteria:

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

Regulatory Equivalence Criteria:

• RoHS3 Compliance (required)
• REACH Unaffected status (required)

All identified substitute parts meet these criteria. The DC voltage rating variance (32V for CMB-063-00ENN-B-A versus 50V for CBW57 series) does not disqualify substitution, as the higher DC rating of substitute parts provides equivalent or superior performance in DC applications within the specified range.

Parameter Comparison

Engineering Selection Recommendations

All three OptiFuse CBW57 series parts (CBW57-EJ-6A, CBW57-EL4-6A, CBW57-ES-6A) are direct functional equivalents to the CMB-063-00ENN-B-A. Selection among these alternatives is based on inventory availability and application requirements:

CBW57-ES-6A provides the highest inventory level at 2,884 pieces, supporting high-volume procurement requirements.

CBW57-EL4-6A offers 1,393 pieces in stock, suitable for standard production runs.

CBW57-EJ-6A maintains 1,366 pieces in inventory, providing an alternative sourcing option.

All substitute parts carry identical regulatory compliance certifications (RoHS3, REACH Unaffected, EAR99 classification) and maintain active product status. The DC voltage rating increase from 32V to 50V in the OptiFuse alternatives does not restrict application scope, as these parts operate within the original specification range and provide enhanced DC performance margin.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series breakers directly replace CMB-063-00ENN-B-A in existing designs?

A: Yes. All three CBW57 variants meet the critical electrical and mechanical parameters: 6A current rating, 250V AC voltage rating, single-pole configuration, panel-mount installation, and push-to-reset actuation. Physical form factor compatibility must be verified against the specific panel cutout and mounting hardware specifications for your application.

Q: What is the significance of the higher DC voltage rating (50V) in the CBW57 series compared to the original 32V specification?

A: The higher DC rating indicates the substitute parts are rated for operation at higher DC voltages. In applications operating at or below 32V DC, the CBW57 series provides equivalent performance with additional voltage margin. This does not create incompatibility; it represents a performance enhancement for DC applications.

Q: Are all three CBW57 variants electrically identical?

A: Yes. CBW57-EJ-6A, CBW57-EL4-6A, and CBW57-ES-6A share identical electrical specifications, mechanical design, and regulatory compliance. The part number suffixes reflect internal OptiFuse design variations that do not affect functional equivalence for the specified 6A, 250V AC, 32V DC application.

Q: What certifications apply to these substitute parts?

A: All substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. The original CMB-063-00ENN-B-A carries CE, cUL, TUV, UL1077, and UL1500 certifications. Both sets include UL1077 and UL1500 standards applicable to thermal circuit breakers.

Q: Are there any packaging or moisture sensitivity considerations?

A: All parts are supplied in bulk packaging. The CBW57 series carries Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture-related storage or handling restrictions. The CMB-063-00ENN-B-A does not specify MSL, indicating standard handling procedures apply.

Q: Which substitute part should be selected for new designs?

A: Selection should prioritize inventory availability aligned with production volume requirements. CBW57-ES-6A offers the highest stock level (2,884 pieces), making it suitable for high-volume applications. CBW57-EL4-6A and CBW57-EJ-6A provide alternative sourcing with adequate inventory for standard production requirements.