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CLB-203-11ANN-B-A Equivalent & Substitute Parts
Part Overview
The CLB-203-11ANN-B-A 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 holds active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. The device is RoHS3 compliant and REACH unaffected. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate alternative suppliers.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CLB-203-11ANN-B-A |
| Manufacturer | Carling Technologies |
| Series | CLB |
| 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 |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the CLB-203-11ANN-B-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 Variation:
- Voltage Rating - DC: The CLB-203-11ANN-B-A operates at 32V DC. All identified substitute parts from OptiFuse (CBW57 series) operate at 50V DC, which represents a higher voltage capability and is functionally compatible for applications requiring 32V DC operation.
All substitute parts maintain active product status, RoHS3 compliance, and equivalent approval agency certifications (cURus, UL 1077, UL 1500). The CBW57 series from OptiFuse provides direct functional equivalence with enhanced DC voltage rating capability.
Parameter Comparison
| Parameter | CLB-203-11ANN-B-A | 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 |
| 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 |
| Breaker Type | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal |
| 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 |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
All listed substitute parts from the OptiFuse CBW57 series meet the functional and compliance requirements for direct substitution with the CLB-203-11ANN-B-A. Selection among the substitute options should be based on the following factors:
Compliance and Certification: All substitute parts carry active product status and maintain RoHS3 compliance. The CBW57 series holds cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications, which overlap with the primary part's approval agencies (CE, cUL, TUV, UL1077, UL1500).
Voltage Capability: The CBW57 series operates at 50V DC, exceeding the CLB-203-11ANN-B-A specification of 32V DC. This higher rating provides enhanced margin for DC applications and does not restrict use in 32V DC circuits.
Inventory Availability: Substitute part selection may be influenced by current inventory levels. The CBW57-ES-20A-5H variant maintains the highest inventory at 2,458 pieces, followed by CBW57-ES-20A at 1,833 pieces.
Moisture Sensitivity: All CBW57 variants specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.
Frequently Asked Questions (FAQ)
Q: Can CBW57 series parts directly replace the CLB-203-11ANN-B-A?
A: Yes. All 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 (1-pole). The DC voltage rating difference (50V versus 32V) represents a higher capability and does not restrict compatibility in 32V DC applications.
Q: What is the significance of the higher 50V DC rating on the CBW57 series?
A: The 50V DC rating on CBW57 parts exceeds the CLB-203-11ANN-B-A specification of 32V DC. This higher rating provides additional safety margin and operational flexibility. Parts rated for higher voltages are functionally compatible with lower voltage applications.
Q: Are all CBW57 variants electrically equivalent?
A: All listed CBW57 variants (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) share identical electrical specifications: 20A current rating, 250V AC, 50V DC, thermal operation, and push-to-reset actuation. Variant designations reflect mechanical or packaging differences not affecting electrical performance in standard panel-mount applications.
Q: What compliance standards apply to substitute parts?
A: CBW57 series parts hold cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. These certifications overlap with the CLB-203-11ANN-B-A approvals (CE, cUL, TUV, UL1077, UL1500), ensuring regulatory compliance for equivalent applications.
Q: Is RoHS3 compliance maintained across all substitute options?
A: Yes. All CBW57 variants are RoHS3 compliant and REACH unaffected, matching the environmental compliance status of the CLB-203-11ANN-B-A.
Q: How should I select among the multiple CBW57 variants?
A: Selection should be based on mechanical packaging requirements indicated by the variant suffix (EJ, EL4, ES, HS, PB, PF, PL designations) and current inventory availability. All variants provide identical electrical performance for the 20A, 250V AC, 50V DC thermal circuit breaker function.
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