CMB-063-27G3N-B-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CMB-063-27G3N-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 electrical systems. The part maintains active product status and holds multiple international approvals including CE, cUL, TUV, UL1077, and UL1500 certifications. Substitute parts are identified when equivalent electrical and mechanical parameters are met, enabling component interchangeability for procurement flexibility and supply chain continuity.

Substiute Parts

CMB-063-27G3N-B-A

Carling TechnologiesIn Stock: 734CMB-063-27G3N-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-063-27G3N-B-A are qualified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Critical Matching Parameters:

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

Allowable Variance:

• Voltage Rating - DC: The main part specifies 32V DC. Substitute parts rated at 50V DC are acceptable as this represents a higher voltage capability, maintaining backward compatibility in DC applications.

All substitute parts identified (CBW57-EJ-6A, CBW57-EL4-6A, CBW57-ES-6A) are manufactured by OptiFuse and meet these substitution criteria. Each substitute maintains ROHS3 compliance and REACH unaffected status, consistent with the main part.

Parameter Comparison

Engineering Selection Recommendations

All three OptiFuse substitute parts (CBW57-EJ-6A, CBW57-EL4-6A, CBW57-ES-6A) are qualified equivalents for the CMB-063-27G3N-B-A. Selection among these substitutes is based on availability and application requirements:

CBW57-ES-6A offers the highest inventory availability at 2,884 pieces in stock, providing optimal supply chain assurance for high-volume applications.

CBW57-EL4-6A maintains 1,393 pieces in stock, suitable for standard procurement volumes.

CBW57-EJ-6A provides 1,366 pieces in stock and represents an alternative sourcing option.

All substitute parts carry active product status and maintain compliance with international standards including cURus, UL 1077, and UL 1500 certifications. The elevated DC voltage rating (50V versus 32V) on all substitutes provides enhanced capability for DC circuit protection without compromising AC performance at 250V.

Frequently Asked Questions (FAQ)

Q: Can CBW57-EJ-6A, CBW57-EL4-6A, and CBW57-ES-6A be used interchangeably with CMB-063-27G3N-B-A?

A: Yes. All three OptiFuse parts meet the critical electrical parameters: 6A current rating, 250V AC voltage rating, thermal breaker type, single-pole configuration, and push-to-reset actuation. Panel-mount mechanical compatibility is identical across all parts.

Q: What is the significance of the higher DC voltage rating (50V) on the substitute parts?

A: The substitute parts are rated for 50V DC compared to the main part's 32V DC rating. This higher rating indicates greater DC voltage capability and does not restrict use in applications requiring 32V DC protection. The substitute parts remain fully compatible with the original application parameters.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three substitute parts (CBW57-EJ-6A, CBW57-EL4-6A, CBW57-ES-6A) are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the CMB-063-27G3N-B-A.

Q: Which substitute part should be selected for maximum availability?

A: CBW57-ES-6A provides the highest inventory level at 2,884 pieces in stock, ensuring supply continuity for applications requiring immediate or high-volume procurement.

Q: Do the substitute parts carry the same international certifications?

A: The substitute parts carry UL 1077 and UL 1500 certifications consistent with the main part. OptiFuse substitutes additionally carry cURus and SAE J1171 approvals, providing equivalent or enhanced regulatory coverage for panel-mount thermal circuit breaker applications.

Q: Are there any mechanical differences between the main part and substitutes?

A: No. All parts share identical mounting type (panel mount), actuator type (push to reset), pole configuration (single pole), and illumination status (none). Physical installation and electrical connection are equivalent.