CMB-033-11CNN-W-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CMB-033-11CNN-W-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 holds 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-W-A

Carling TechnologiesIn Stock: 864CMB-033-11CNN-W-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-W-A are qualified based on the following critical parameters that must align with the main part specification:

Matching Parameters (Required for Substitution):

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

Parameter Variance Permitted:

• Voltage Rating - DC: The substitute parts are rated for 50V DC, compared to the main part's 32V DC rating. This represents an uprated specification that maintains compatibility in applications requiring the main part's 32V DC capability.

All identified substitute parts are manufactured by OptiFuse under the CBW57 series and maintain Active product status with ROHS3 compliance and REACH Unaffected status. The substitute parts carry equivalent or expanded approval certifications including cURus, IP 40, SAE J1171, UL 1077, and UL 1500.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full ROHS3 compliance, ensuring regulatory alignment with the CMB-033-11CNN-W-A. The OptiFuse CBW57 series alternatives carry comprehensive approval certifications including UL 1077 and UL 1500, matching the primary part's safety standards.

The DC voltage rating differential (50V on substitutes versus 32V on the main part) represents an uprated specification. Applications operating at or below 32V DC will function within the substitute parts' rated capability. The substitute parts are available in higher inventory quantities across all variants, ranging from 869 to 1358 pieces in stock compared to 781 pieces for the main part.

Selection among the five substitute variants (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, CBW57-PS-3A-1X) depends on specific mechanical interface requirements, as all share identical electrical specifications and certifications.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-033-11CNN-W-A in existing designs?

A: Yes. All five CBW57 variants match the critical electrical parameters: 3A current rating, 250V AC voltage rating, thermal breaker type, push-to-reset actuation, single-pole configuration, and panel-mount form factor. The 50V DC rating on CBW57 parts exceeds the 32V DC requirement of the main part.

Q: What is the significance of the different CBW57 part number suffixes (EJ, EL4, ES, PF-5X, PS-1X)?

A: The suffixes denote mechanical or packaging variations within the CBW57 series. All variants maintain identical electrical specifications and certifications. Selection should be based on mechanical interface compatibility with the application's panel-mount requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The CMB-033-11CNN-W-A and all five CBW57 substitute parts are ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

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

A: The substitute parts carry UL 1077 and UL 1500 certifications matching the main part. OptiFuse CBW57 parts additionally carry cURus, IP 40, and SAE J1171 certifications, providing expanded approval coverage.

Q: Why is the DC voltage rating higher on the substitute parts?

A: The CBW57 series is rated for 50V DC, which is an uprated specification compared to the CMB-033-11CNN-W-A's 32V DC rating. This does not affect compatibility in applications requiring 32V DC operation, as the substitute parts function within this lower voltage range.

Q: What inventory considerations apply to these substitute parts?

A: The CBW57-EL4-3A variant offers the highest inventory availability at 1358 pieces, followed by CBW57-ES-3A at 1289 pieces and CBW57-PS-3A-1X at 1120 pieces. CBW57-PF-3A-5X maintains 869 pieces in stock. All exceed the 781-piece inventory of the main part.