CLB-033-12CNN-B-F/03 Equivalent & Substitute Parts

Part Overview

The CLB-033-12CNN-B-F/03 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. The part is ROHS3 compliant and REACH unaffected. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits equivalent component selection.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	3A
Voltage Rating - AC	250V
Voltage Rating - DC	32V
Mounting Type	Panel Mount
Actuator Type	Push to Reset
Number of Poles	1
Illumination	None
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

All identified substitute parts are from the OptiFuse CBW57 series and maintain electrical and mechanical compatibility with the CLB-033-12CNN-B-F/03 based on the following criteria:

Matching Parameters:

Current Rating: 3A
Voltage Rating - AC: 250V
Mounting Type: Panel Mount
Breaker Type: Thermal
Actuator Type: Push to Reset
Number of Poles: 1
Illumination: None
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

Voltage Rating - DC Consideration: The substitute parts are rated for 50V DC, which exceeds the 32V DC requirement of the main part. This higher DC voltage rating provides operational compatibility within the specified 32V DC application envelope.

All substitute parts carry active product status and maintain regulatory compliance through cURus, UL 1077, and UL 1500 certifications.

Parameter Comparison

Parameter	CLB-033-12CNN-B-F/03 (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	250V	250V	250V	250V	250V	250V
Voltage Rating - DC	32V	50V	50V	50V	50V	50V
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
Illumination	None	None	None	None	None	None
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 parts provide direct functional equivalence to the CLB-033-12CNN-B-F/03 for applications requiring a 3A thermal circuit breaker with 250V AC and 32V DC operation. Each substitute maintains active product status and ROHS3 compliance.

The CBW57 series parts carry UL 1077 and UL 1500 certifications, which align with the regulatory framework of the original part. The cURus certification provides additional North American regulatory coverage. All substitute parts are REACH unaffected, matching the environmental compliance profile of the main part.

Selection among the five substitute options may be determined by availability, packaging configuration, or specific connector interface requirements indicated by the part number suffix (EJ, EL4, ES, PF-5X, PS-1X). All variants maintain identical electrical specifications and mechanical mounting compatibility.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CLB-033-12CNN-B-F/03?

A: Yes. All five identified CBW57 variants match the critical electrical parameters: 3A current rating, 250V AC voltage rating, 32V DC operation (CBW57 parts rated to 50V DC), single-pole configuration, push-to-reset actuation, and panel-mount form factor. Mechanical and electrical compatibility is established through these matching parameters.

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

A: The CBW57 series parts are rated for 50V DC, which exceeds the 32V DC requirement of the CLB-033-12CNN-B-F/03. This higher rating ensures the substitute parts operate safely and reliably within the 32V DC application envelope without derating.

Q: Are there differences between the five CBW57 substitute options?

A: The five CBW57 variants (EJ-3A, EL4-3A, ES-3A, PF-3A-5X, PS-3A-1X) maintain identical electrical and mechanical specifications. Differences are indicated by the part number suffix and relate to connector interface or packaging configuration. Electrical performance and mounting compatibility are equivalent across all five options.

Q: Do the substitute parts meet the same regulatory standards?

A: The CBW57 series parts carry UL 1077 and UL 1500 certifications, which correspond to the regulatory standards of the original part. The cURus certification provides additional North American regulatory recognition. Both the main part and all substitutes are ROHS3 compliant and REACH unaffected.

Q: What inventory levels are available for the substitute parts?

A: CBW57-PS-3A-1X: 1120 pcs; CBW57-EJ-3A: 1203 pcs; CBW57-EL4-3A: 1358 pcs; CBW57-ES-3A: 1289 pcs; CBW57-PF-3A-5X: 869 pcs. All parts are listed as new original stock in bulk packaging.

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

A: No. All parts are panel-mount thermal circuit breakers with identical actuator type (push to reset) and single-pole configuration. Mechanical compatibility is established through these matching parameters.

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