CLB-203-11ANN-W-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CLB-203-11ANN-W-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 20A at 250V AC and 32V DC. This single-pole, panel-mount breaker 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 inventory requirements necessitate alternative suppliers.

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

Substitution eligibility for the CLB-203-11ANN-W-A is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Current Rating: 20A
Voltage Rating - AC: 250V
Mounting Type: Panel Mount
Breaker Type: Thermal
Actuator Type: Push to Reset
Number of Poles: 1
Illumination: None

Acceptable Variance:

Voltage Rating - DC: The CLB-203-11ANN-W-A operates at 32V DC. All identified substitute parts from OptiFuse operate at 50V DC, which provides enhanced DC voltage capability while maintaining compatibility with the 32V DC application requirement.

All substitute parts are manufactured by OptiFuse under the CBW57 series and maintain identical AC voltage, current rating, mounting configuration, and actuation characteristics. Each substitute part carries active product status and ROHS3 compliance certification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Mounting Type	Breaker Type	Actuator Type	Poles	Product Status	RoHS Status
CLB-203-11ANN-W-A	Carling Technologies	20	250	32	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-EJ-20A	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-EL4-20A	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-ES-20A	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-ES-20A-5H	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-ES-20A-5X	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-HS-20A-5X	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-HS-20A-C	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-PB-20A-WX	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-PF-20A-5X	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant
CBW57-PL-20A-5X	OptiFuse	20	250	50	Panel Mount	Thermal	Push to Reset	1	Active	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts meet the functional and electrical requirements of the CLB-203-11ANN-W-A. Selection among the OptiFuse CBW57 series alternatives should be based on the following criteria:

Compliance Alignment: The CLB-203-11ANN-W-A carries certifications from CE, cUL, TUV, UL1077, and UL1500. OptiFuse CBW57 series parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. Both product lines maintain ROHS3 compliance and EAR99 export classification.

Voltage Capability: All OptiFuse substitutes provide 50V DC rating, which exceeds the 32V DC requirement of the original part. This enhanced DC voltage rating does not create incompatibility and provides additional operational margin in DC applications.

Inventory Availability: OptiFuse CBW57 series parts demonstrate consistent stock levels across all variants, with inventory ranging from 850 to 2458 units. The CBW57-ES-20A-5H variant maintains the highest inventory position at 2458 units.

Product Status: All substitute parts maintain active product status, ensuring continued availability and manufacturer support.

Frequently Asked Questions (FAQ)

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

A: Yes. All OptiFuse CBW57 variants listed maintain identical current rating (20A), AC voltage rating (250V), mounting type (panel mount), breaker type (thermal), actuator type (push to reset), and pole configuration (single pole). The 50V DC rating of OptiFuse parts exceeds the 32V DC requirement and does not create incompatibility.

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) denote internal design variations and connector configurations specific to OptiFuse manufacturing. These variations do not affect the core electrical parameters that determine substitution eligibility. Selection among variants should be based on specific connector or mounting requirements of the application.

Q: Are there any compliance or certification differences between the CLB-203-11ANN-W-A and OptiFuse substitutes?

A: Both product lines carry UL 1077 and UL 1500 certifications. The CLB-203-11ANN-W-A includes CE and TUV certifications, while OptiFuse parts carry cURus and SAE J1171 certifications. Both maintain ROHS3 compliance. Application-specific certification requirements should be verified against system-level compliance documentation.

Q: What is the Moisture Sensitivity Level (MSL) of the substitute parts?

A: OptiFuse CBW57 series parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage or handling.

Q: Can I use these parts interchangeably in existing designs?

A: Electrical and mechanical interchangeability is confirmed across all listed parameters. Physical form factor, connector type, and mounting footprint should be verified against specific application requirements, as these details are not provided in the parametric data.

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