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CLB-203-11B2N-W-D Equivalent & Substitute Parts
Part Overview
The CLB-203-11B2N-W-D 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 permits equivalent component selection.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Carling Technologies |
| Part Number | CLB-203-11B2N-W-D |
| 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
Substitute parts for the CLB-203-11B2N-W-D are qualified based on the following critical parameters that determine functional equivalence:
Primary Matching Criteria:
- Current Rating: 20A (exact match required)
- Voltage Rating - AC: 250V (exact match required)
- Breaker Type: Thermal (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)
Secondary Consideration:
- Voltage Rating - DC: The main part specifies 32V DC. Substitute parts rated at 50V DC provide enhanced capability and are acceptable for applications requiring the specified 32V DC rating, as higher DC voltage ratings maintain backward compatibility.
All identified substitute parts are manufactured by OptiFuse under the CBW57 series and meet these equivalence criteria. Each substitute maintains Active product status and ROHS3 compliance. Approval agencies differ between the main part and substitutes but both sets include UL 1077 and UL 1500 certifications.
Parameter Comparison
| Parameter | CLB-203-11B2N-W-D (Main) | 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 |
| Series | CLB | CBW57 | CBW57 | CBW57 | CBW57 | CBW57 | CBW57 | CBW57 | CBW57 | CBW57 | CBW57 |
| 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 |
| 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 substitute parts listed maintain Active product status and ROHS3 compliance, establishing baseline qualification for component selection. The CLB-203-11B2N-W-D carries approvals from CE, cUL, TUV, UL1077, and UL1500. The OptiFuse CBW57 series substitutes carry approvals from cURus, IP 40, SAE J1171, UL 1077, and UL 1500. Both the main part and all substitutes include UL 1077 and UL 1500 certifications, confirming thermal circuit breaker performance standards.
The primary electrical distinction is the DC voltage rating: the main part is rated 32V DC while all OptiFuse substitutes are rated 50V DC. This higher DC rating in substitute parts provides enhanced capability for DC applications and maintains full compatibility with the specified 32V DC requirement.
All substitute parts are available in bulk packaging with inventory quantities ranging from 850 to 2,458 pieces. Selection among the CBW57 variants should be based on specific application requirements and connector or terminal configurations indicated by the part number suffixes (EJ, EL4, ES, HS, PB, PF, PL designations).
Frequently Asked Questions (FAQ)
Q: Can OptiFuse CBW57 series parts directly replace the Carling Technologies CLB-203-11B2N-W-D?
A: Yes. All listed OptiFuse CBW57 variants match the critical electrical and mechanical parameters: 20A current rating, 250V AC voltage rating, thermal breaker type, panel mount configuration, push-to-reset actuation, and single-pole design. Both product lines maintain Active status and ROHS3 compliance.
Q: What is the significance of the 50V DC rating on substitute parts versus the 32V DC rating on the main part?
A: The substitute parts are rated for 50V DC, which exceeds the main part's 32V DC specification. Higher DC voltage ratings indicate enhanced capability and provide backward compatibility for applications requiring 32V DC operation. No derating or performance reduction occurs when using the higher-rated substitute in a 32V DC application.
Q: Are the approval certifications equivalent between the main part and substitutes?
A: Both the main part and substitute parts include UL 1077 and UL 1500 certifications, which are the primary standards for thermal circuit breaker performance. The main part carries additional CE, cUL, and TUV approvals, while substitutes carry cURus, IP 40, and SAE J1171 approvals. Application requirements determine which certification set is necessary.
Q: What do the different CBW57 part number suffixes represent?
A: The suffixes (EJ, EL4, ES, HS, PB, PF, PL) and additional designations (5H, 5X, C, WX) indicate variations in connector types, terminal configurations, or mechanical features. These designations do not affect the core electrical specifications of current rating, voltage rating, or breaker type. Selection should be based on the specific connector or terminal requirement of the application.
Q: Are all substitute parts available in the same packaging format?
A: All substitute parts are supplied in bulk packaging. The main part is supplied with standard packaging designation. Bulk packaging is suitable for production environments and high-volume applications.
Q: Can I use any of the listed CBW57 variants interchangeably?
A: All listed CBW57 variants are electrically equivalent based on the provided parameters. Interchangeability depends on mechanical compatibility with the panel mount location and connector/terminal compatibility with the circuit board or wiring harness. Verify that the specific connector type indicated by the part number suffix matches the application requirements.
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