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CLB-203-11ANN-R-A Circuit Breaker Equivalent & Substitute Parts
Part Overview
The CLB-203-11ANN-R-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 20A at 250V AC and 32V DC with push-to-reset panel mount actuation. This single-pole breaker is designed for overcurrent protection in industrial and commercial applications and maintains Active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards.
Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across manufacturers. The CLB-203-11ANN-R-A has documented substitute options from OptiFuse within the CBW57 series that preserve critical performance characteristics while offering alternative form factors and connector configurations.
Substiute Parts
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-R-A is determined by strict equivalence across the following parameters:
Critical Matching Parameters:
- Current Rating: 20A (exact match required)
- Voltage Rating - AC: 250V (exact match required)
- Mounting Type: Panel Mount (exact match required)
- Actuator Type: Push to Reset (exact match required)
- Number of Poles: 1 (exact match required)
- Breaker Type: Thermal (exact match required)
Allowable Variance:
- Voltage Rating - DC: The CLB-203-11ANN-R-A operates at 32V DC. All identified OptiFuse CBW57 series substitutes operate at 50V DC, which represents a higher voltage capability and is functionally compatible for applications requiring 32V DC operation.
All substitute parts are manufactured by OptiFuse within the CBW57 series and maintain Active product status with ROHS3 compliance and EAR99 export classification. Substitute parts differ only in connector type and terminal configuration, designated by suffix codes (EJ, EL4, ES, HS, PB, PF, PL).
Parameter Comparison
| Parameter | CLB-203-11ANN-R-A (Carling) | CBW57-EJ-20A (OptiFuse) | CBW57-EL4-20A (OptiFuse) | CBW57-ES-20A (OptiFuse) | CBW57-ES-20A-5H (OptiFuse) | CBW57-ES-20A-5X (OptiFuse) | CBW57-HS-20A-5X (OptiFuse) | CBW57-HS-20A-C (OptiFuse) | CBW57-PB-20A-WX (OptiFuse) | CBW57-PF-20A-5X (OptiFuse) | CBW57-PL-20A-5X (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 OptiFuse CBW57 series circuit breakers are functionally equivalent to the CLB-203-11ANN-R-A for applications requiring 20A thermal protection at 250V AC. The higher DC voltage rating (50V versus 32V) of the substitute parts provides enhanced capability for DC circuit protection and does not restrict their use in 32V DC applications.
Compliance Considerations:
The CLB-203-11ANN-R-A carries approvals from CE, cUL, TUV, UL1077, and UL1500. OptiFuse CBW57 series substitutes carry approvals from cURus, IP 40, SAE J1171, UL 1077, and UL 1500. Both product lines maintain ROHS3 compliance and EAR99 export classification.
Selection Basis:
Choice among the CBW57 substitute variants (EJ, EL4, ES, HS, PB, PF, PL) is determined by connector type and terminal configuration requirements specific to the application. All variants maintain identical electrical performance and thermal protection characteristics. Selection should be based on mechanical fit within the panel mount assembly and terminal compatibility with existing wiring harnesses.
Frequently Asked Questions (FAQ)
Q: Can OptiFuse CBW57 series breakers directly replace the CLB-203-11ANN-R-A?
A: Yes. All listed OptiFuse CBW57 variants maintain identical current rating (20A), AC voltage rating (250V), mounting type (panel mount), actuator type (push to reset), and pole configuration (1-pole). The higher DC voltage rating (50V) of the OptiFuse parts is compatible with 32V DC applications.
Q: What is the difference between the various CBW57 suffix codes?
A: The suffix codes (EJ, EL4, ES, HS, PB, PF, PL) designate different connector types and terminal configurations. Electrical performance and thermal protection characteristics remain identical across all variants. Selection is based on mechanical compatibility with the panel assembly and terminal connection requirements.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. Both the CLB-203-11ANN-R-A and all OptiFuse CBW57 series substitutes are ROHS3 compliant and REACH unaffected.
Q: What approvals do the substitute parts carry?
A: OptiFuse CBW57 series breakers carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. The original CLB-203-11ANN-R-A carries CE, cUL, TUV, UL1077, and UL1500 approvals. Both product lines meet UL 1077 and UL 1500 standards for thermal circuit breaker performance.
Q: Is the 50V DC rating of the OptiFuse parts a limitation for 32V DC applications?
A: No. A higher voltage rating indicates greater capability. OptiFuse CBW57 parts rated for 50V DC operate safely in 32V DC circuits and provide equivalent protection performance.
Q: How do I select the correct CBW57 variant for my application?
A: Determine the connector type and terminal configuration required by your panel assembly and wiring harness. All CBW57 variants provide identical thermal protection at 20A, 250V AC. Consult the mechanical drawings for each suffix variant to confirm fit and terminal compatibility.
Q: Are there inventory considerations when selecting a substitute?
A: Yes. Inventory levels vary by part number. CBW57-ES-20A-5H has the highest inventory (2,458 units), while CBW57-PL-20A-5X has lower availability (862 units). Verify current stock status for your selected variant.
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