CMB-033-11C3N-R-A Equivalent & Substitute Parts

Part Overview

The CMB-033-11C3N-R-A is a thermal circuit breaker manufactured by Carling Technologies, designed for panel mount applications. This single-pole breaker operates at 3A current rating with 250 V AC and 32 V DC voltage specifications, featuring push-to-reset actuation. The product maintains Active status with full compliance to CE, cUL, TUV, UL1077, and UL1500 approval agencies. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits component selection from qualified manufacturers.

Key Parameters

Parameter	Value
Manufacturer	Carling Technologies
Part Number	CMB-033-11C3N-R-A
Series	CMB
Breaker Type	Thermal
Current Rating	3A
Voltage Rating - AC	250 V
Voltage Rating - DC	32 V
Mounting Type	Panel Mount
Actuator Type	Push to Reset
Number of Poles	1
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CMB-033-11C3N-R-A are qualified based on the following critical parameters that determine functional equivalence:

Matching Parameters:

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

Voltage Rating - DC Consideration: The main part specifies 32 V DC. All substitute parts from OptiFuse (CBW57 series) are rated for 50 V DC, which exceeds the minimum requirement and provides enhanced capability for DC applications.

All identified substitutes maintain Active product status and carry relevant regulatory approvals (cURus, UL 1077, UL 1500) that align with the original part's certification framework.

Parameter Comparison

Parameter	CMB-033-11C3N-R-A (Carling)	CBW57-EJ-3A (OptiFuse)	CBW57-EL4-3A (OptiFuse)	CBW57-ES-3A (OptiFuse)	CBW57-PF-3A-5X (OptiFuse)	CBW57-PS-3A-1X (OptiFuse)
Breaker Type	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal
Current Rating (Amps)	3A	3A	3A	3A	3A	3A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V	250 V
Voltage Rating - DC	32 V	50 V	50 V	50 V	50 V	50 V
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount
Actuator Type	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset
Number of Poles	1	1	1	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

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-033-11C3N-R-A based on electrical and mechanical parameter alignment.

Compliance Framework: The substitute parts carry UL 1077 and UL 1500 certifications, which correspond to the original part's approval agencies. Additional certifications including cURus and SAE J1171 provide expanded regulatory coverage. All parts maintain ROHS3 compliance and REACH Unaffected status, consistent with the original component.

DC Voltage Rating Enhancement: The OptiFuse substitutes are rated for 50 V DC compared to the original 32 V DC specification. This higher rating does not compromise compatibility and provides additional operational margin for DC circuit applications.

Inventory Availability: Substitute parts demonstrate consistent stock levels ranging from 869 to 1358 pieces, supporting reliable procurement for production and replacement requirements.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-033-11C3N-R-A?

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

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

A: The CBW57 series 50 V DC rating provides enhanced capability for DC applications. Since the original part specifies 32 V DC, the higher rating of substitute parts ensures compatibility with the original design while offering additional operational headroom.

Q: Are there differences between the five CBW57 substitute part numbers?

A: The five CBW57 variants (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X) share identical electrical and mechanical specifications. Differences in part number suffixes reflect internal OptiFuse design or packaging variations that do not affect functional equivalence for this application.

Q: Do substitute parts carry the same regulatory approvals?

A: Substitute parts carry UL 1077 and UL 1500 certifications matching the original part. OptiFuse parts include additional certifications (cURus, IP 40, SAE J1171) that provide expanded regulatory coverage beyond the original Carling Technologies part.

Q: What is the packaging format for substitute parts?

A: All five CBW57 substitutes are supplied in Bulk packaging, consistent with industrial component distribution standards.

Q: Are there any moisture sensitivity considerations for substitute parts?

A: CBW57 series parts carry Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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