CMB-033-11CNN-R-A Equivalent & Substitute Parts

Part Overview

The CMB-033-11CNN-R-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 3A 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 with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits equivalent component selection.

Substiute Parts

CMB-033-11CNN-R-A

Carling TechnologiesIn Stock: 750CMB-033-11CNN-R-A Datasheet

Current PartRFQ

CBW57-EJ-3A

OptiFuseIn Stock: 1310CBW57-EJ-3A Datasheet

Parametric EquivalentRFQ

CBW57-EL4-3A

OptiFuseIn Stock: 1370CBW57-EL4-3A Datasheet

Parametric EquivalentRFQ

CBW57-ES-3A

OptiFuseIn Stock: 1344CBW57-ES-3A Datasheet

Parametric EquivalentRFQ

CBW57-PF-3A-5X

OptiFuseIn Stock: 938CBW57-PF-3A-5X Datasheet

Parametric EquivalentRFQ

CBW57-PS-3A-1X

OptiFuseIn Stock: 1225CBW57-PS-3A-1X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMB-033-11CNN-R-A are qualified based on electrical and mechanical parameter alignment. All identified substitutes maintain the following critical parameters:

• Current Rating: 3A
• Voltage Rating - AC: 250V
• Mounting Type: Panel Mount
• Actuator Type: Push to Reset
• Number of Poles: 1
• Breaker Type: Thermal
• RoHS Status: ROHS3 Compliant

The substitute parts are manufactured by OptiFuse under the CBW57 series. These parts operate at a higher DC voltage rating (50V DC versus 32V DC on the main part), which represents an upward-compatible specification. All substitutes carry equivalent regulatory approvals including UL 1077 and UL 1500 certifications.

Parameter Comparison

Engineering Selection Recommendations

All five OptiFuse CBW57 series substitutes (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X) are qualified equivalents for the CMB-033-11CNN-R-A. Each substitute maintains Active product status and carries UL 1077 and UL 1500 certifications, which align with the primary part's regulatory requirements.

The primary distinction among substitutes is the DC voltage rating specification. All OptiFuse alternatives are rated for 50V DC, which exceeds the 32V DC requirement of the Carling part. This upward-compatible rating ensures operation within the original design envelope while providing additional margin for DC applications.

All substitutes are ROHS3 compliant and REACH unaffected, matching the environmental compliance profile of the main part. Inventory availability varies across the substitute options, with quantities ranging from 869 to 1358 pieces in stock.

Frequently Asked Questions (FAQ)

Q: Can the OptiFuse CBW57 series parts directly replace the CMB-033-11CNN-R-A?

A: Yes. All five OptiFuse substitutes maintain identical current rating (3A), AC voltage rating (250V), mounting type (panel mount), actuator type (push to reset), and pole configuration (1-pole). The higher DC voltage rating (50V versus 32V) on the OptiFuse parts is an upward-compatible specification.

Q: What is the significance of the higher DC voltage rating on the substitute parts?

A: The OptiFuse CBW57 series parts are rated for 50V DC compared to the 32V DC rating of the CMB-033-11CNN-R-A. This higher rating does not affect compatibility in applications operating at or below 32V DC. The substitute parts are suitable for applications requiring up to 50V DC operation.

Q: Are all five OptiFuse substitutes electrically identical?

A: The five OptiFuse part numbers (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X) share identical electrical specifications. Differences in part numbers reflect variations in packaging, connector type, or internal configuration that do not affect the core thermal protection function.

Q: Do the substitute parts carry equivalent regulatory approvals?

A: The OptiFuse substitutes carry UL 1077 and UL 1500 certifications, which match the primary certifications of the CMB-033-11CNN-R-A. The OptiFuse parts also include cURus, IP 40, and SAE J1171 approvals, providing additional compliance coverage.

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

A: No. Both the CMB-033-11CNN-R-A and all OptiFuse substitutes are ROHS3 compliant and REACH unaffected, ensuring equivalent environmental compliance.

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

A: Selection among the five OptiFuse substitutes should be based on packaging requirements, connector specifications, and inventory availability. All five parts are electrically and mechanically equivalent for the specified application parameters.