CMB-063-11CNN-B-A Equivalent & Substitute Parts

Part Overview

The CMB-063-11CNN-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 device features push-to-reset actuation and is designed for overcurrent protection in low-voltage applications. The part maintains active product status and carries 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-063-11CNN-B-A

Carling TechnologiesIn Stock: 909CMB-063-11CNN-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-063-11CNN-B-A are qualified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Primary Matching Parameters:

• Current Rating: 6A (exact match required)
• Voltage Rating - AC: 250V (exact match required)
• Mounting Type: Panel Mount (exact match required)
• Breaker Type: Thermal (exact match required)
• Actuator Type: Push to Reset (exact match required)
• Number of Poles: 1 (exact match required)

Secondary Consideration:

• Voltage Rating - DC: The main part specifies 32V DC. Substitute parts rated at 50V DC exceed the minimum requirement and remain compatible for applications operating at or below 32V DC.

All identified substitutes are manufactured by OptiFuse under the CBW57 series and meet ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part.

Parameter Comparison

Engineering Selection Recommendations

All three OptiFuse CBW57 series substitutes (CBW57-EJ-6A, CBW57-EL4-6A, CBW57-ES-6A) are functionally equivalent to the CMB-063-11CNN-B-A for applications requiring 6A thermal circuit protection at 250V AC and 32V DC or lower.

Compliance Alignment: The original Carling part carries UL1077 and UL1500 certifications. OptiFuse substitutes carry equivalent certifications including UL 1077 and UL 1500, with additional approvals (cURus, IP 40, SAE J1171) that extend functional coverage. All parts maintain ROHS3 compliance and REACH unaffected status.

Voltage Rating Consideration: OptiFuse substitutes are rated for 50V DC, which exceeds the 32V DC requirement of the original part. This higher DC rating provides additional safety margin and does not restrict application in circuits operating at 32V DC or lower.

Inventory Availability: CBW57-ES-6A offers the highest inventory level at 2,884 pieces, followed by CBW57-EL4-6A at 1,393 pieces and CBW57-EJ-6A at 1,366 pieces. The original CMB-063-11CNN-B-A maintains 866 pieces in stock.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series breakers directly replace the CMB-063-11CNN-B-A in existing applications?

A: Yes. All three CBW57 variants match the critical electrical parameters (6A current rating, 250V AC, panel mount configuration, push-to-reset actuation, single pole) and mechanical form factor required for direct substitution in applications designed for the CMB-063-11CNN-B-A.

Q: Why do the OptiFuse substitutes have a higher DC voltage rating (50V vs. 32V)?

A: The 50V DC rating on CBW57 parts represents the maximum voltage the breaker can safely interrupt. Applications operating at 32V DC or lower operate within the safe operating envelope of the 50V-rated device. The higher rating does not affect compatibility or performance in 32V DC circuits.

Q: Are all three CBW57 variants electrically identical?

A: The three CBW57 variants (CBW57-EJ-6A, CBW57-EL4-6A, CBW57-ES-6A) share identical electrical specifications and performance characteristics. Differences in part number suffixes reflect packaging, connector, or mechanical housing variations that do not affect electrical substitution capability.

Q: What certifications apply to the substitute parts?

A: OptiFuse CBW57 series parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. These certifications align with and exceed the UL1077 and UL1500 certifications of the original Carling part, ensuring regulatory compliance in equivalent applications.

Q: Are there any RoHS or environmental compliance differences?

A: No. Both the original CMB-063-11CNN-B-A and all three OptiFuse substitutes are ROHS3 compliant and REACH unaffected, ensuring equivalent environmental and regulatory status.