CLB-203-11ANN-W-F/20 Equivalent & Substitute Parts

Part Overview

The CLB-203-11ANN-W-F/20 is a thermal circuit breaker manufactured by Carling Technologies, rated for 20A at 250V AC and 32V DC. This single-pole, panel-mount device features push-to-reset actuation and is designed for overcurrent protection in industrial and commercial 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 is required within equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	20A
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

Substitute parts for the CLB-203-11ANN-W-F/20 are qualified based on electrical and mechanical parameter equivalence. All substitute parts maintain identical specifications across the following critical parameters: 20A current rating, 250V AC voltage rating, push-to-reset actuation, single-pole configuration, panel-mount installation, and thermal breaker type. All substitute parts are manufactured by OptiFuse under the CBW57 series and carry ROHS3 compliance status.

The substitute parts listed operate at 50V DC, which exceeds the 32V DC specification of the main part. This represents an uprated DC voltage capability and does not restrict substitution in applications requiring 32V DC operation. All substitute parts maintain identical AC voltage ratings and current specifications, ensuring direct functional equivalence in standard circuit protection applications.

Parameter Comparison

Parameter	CLB-203-11ANN-W-F/20	CBW57-EJ-20A	CBW57-EL4-20A	CBW57-ES-20A	CBW57-ES-20A-5H	CBW57-ES-20A-5X	CBW57-HS-20A-5X	CBW57-HS-20A-C	CBW57-PB-20A-WX	CBW57-PF-20A-5X	CBW57-PL-20A-5X
Manufacturer	Carling Technologies	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse
Breaker Type	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal
Current Rating (Amps)	20A	20A	20A	20A	20A	20A	20A	20A	20A	20A	20A
Voltage Rating - AC	250V	250V	250V	250V	250V	250V	250V	250V	250V	250V	250V
Voltage Rating - DC	32V	50V	50V	50V	50V	50V	50V	50V	50V	50V	50V
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	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	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset
Number of Poles	1	1	1	1	1	1	1	1	1	1	1
Illumination	None	None	None	None	None	None	None	None	None	None	None
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full ROHS3 compliance, ensuring long-term availability and environmental regulatory adherence. The OptiFuse CBW57 series parts carry cURus, UL 1077, and UL 1500 certifications, providing equivalent safety approvals to the Carling Technologies CLB-203-11ANN-W-F/20.

Selection among substitute parts should be based on inventory availability and specific connector or terminal configurations required by the application. The uprated 50V DC specification across all OptiFuse substitutes provides enhanced DC voltage margin compared to the 32V DC rating of the primary part, with no operational disadvantage in standard applications.

All substitute parts are available in bulk packaging with current inventory levels ranging from 862 to 2458 units, supporting both prototype and production-volume requirements.

Frequently Asked Questions (FAQ)

Q: Can OptiFuse CBW57 series parts directly replace the Carling Technologies CLB-203-11ANN-W-F/20?

A: Yes. All listed OptiFuse parts maintain identical electrical specifications for current rating (20A), AC voltage rating (250V), mounting type (panel mount), actuator type (push to reset), and pole configuration (single pole). The 50V DC rating on OptiFuse parts exceeds the 32V DC specification and does not restrict substitution in applications operating at or below 32V DC.

Q: What is the significance of the different part number suffixes in the CBW57 series?

A: The suffixes (EJ, EL4, ES, HS, PB, PF, PL) indicate variations in connector type, terminal configuration, or housing material. These designations do not affect the core electrical protection characteristics. Selection should be based on the specific connector or terminal requirements of the target application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the environmental compliance status of the CLB-203-11ANN-W-F/20.

Q: What certifications do the OptiFuse substitute parts carry?

A: OptiFuse CBW57 series parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. These certifications provide equivalent safety and performance validation to the Carling Technologies part.

Q: Is the higher DC voltage rating on OptiFuse parts a concern for 32V DC applications?

A: No. The 50V DC rating on OptiFuse parts represents an uprated specification that provides additional voltage margin. Applications designed for 32V DC operation will function identically with parts rated for 50V DC.

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

A: Inventory levels range from 862 to 2458 units across the listed substitute parts. CBW57-ES-20A-5H maintains the highest inventory at 2458 units, while CBW57-PL-20A-5X maintains the lowest at 862 units.

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

A: No. All parts are specified as panel-mount devices with identical actuator type (push to reset) and pole configuration (single pole), ensuring mechanical compatibility in standard panel-mount installations.

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