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CLB-203-11ANN-R-F/20 Equivalent & Substitute Parts
Part Overview
The CLB-203-11ANN-R-F/20 is a thermal circuit breaker manufactured by Carling Technologies, rated for 20A at 250V AC and 32V DC with push-to-reset actuation and panel mount configuration. This component is classified as Active product status and carries multiple international approvals including CE, cUL, TUV, UL1077, and UL1500 certifications. The device is ROHS3 compliant and REACH unaffected.
Substitute parts become necessary when the primary manufacturer part experiences extended lead times, inventory constraints, or when design flexibility permits selection from alternative manufacturers meeting identical electrical and mechanical specifications. The substitute parts listed below maintain functional equivalence through matching core parameters: 20A current rating, 250V AC voltage rating, push-to-reset actuation, single-pole configuration, and panel mount installation.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Breaker Type | Thermal |
| Current Rating | 20A |
| Voltage Rating - AC | 250V |
| Voltage Rating - DC | 32V |
| Actuator Type | Push to Reset |
| Number of Poles | 1 |
| Mounting Type | Panel Mount |
| Illumination | None |
Substitute Part Grouping Explanation
Substitution eligibility for thermal circuit breakers is determined by strict equivalence across electrical and mechanical parameters. The CLB-203-11ANN-R-F/20 establishes the baseline specification set. All substitute parts must satisfy the following criteria:
Critical Matching Parameters:
- Current Rating: 20A (exact match required)
- Voltage Rating - AC: 250V (exact match required)
- Breaker Type: Thermal (exact match required)
- Actuator Type: Push to Reset (exact match required)
- Number of Poles: 1 (exact match required)
- Mounting Type: Panel Mount (exact match required)
Allowable Variance:
- Voltage Rating - DC: The main part specifies 32V DC. Substitute parts rated at 50V DC are acceptable as this represents a higher voltage capability and maintains backward compatibility with the 32V DC requirement.
All substitute parts listed are manufactured by OptiFuse under the CBW57 series designation. Each substitute maintains thermal breaker functionality with identical AC voltage rating, current capacity, actuation mechanism, and mounting configuration. The DC voltage rating variance (50V versus 32V) does not restrict substitution as the higher rating encompasses the original specification.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Current Rating (A) | Voltage AC (V) | Voltage DC (V) | Breaker Type | Actuator Type | Poles | Mounting | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| CLB-203-11ANN-R-F/20 | Carling Technologies | 20 | 250 | 32 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-EJ-20A | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-EL4-20A | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-ES-20A | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-ES-20A-5H | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-ES-20A-5X | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-HS-20A-5X | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-HS-20A-C | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-PB-20A-WX | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-PF-20A-5X | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
| CBW57-PL-20A-5X | OptiFuse | 20 | 250 | 50 | Thermal | Push to Reset | 1 | Panel Mount | ROHS3 Compliant |
Engineering Selection Recommendations
All listed substitute parts maintain Active product status and carry international regulatory approvals. The CLB-203-11ANN-R-F/20 holds CE, cUL, TUV, UL1077, and UL1500 certifications. OptiFuse substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications, with UL 1077 and UL 1500 providing direct alignment with the original part's certification framework.
All substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental compliance profile of the main part. The CBW57 series substitutes demonstrate equivalent thermal protection functionality through identical current and voltage ratings with push-to-reset actuation.
Selection among the substitute parts may be based on inventory availability and lead time considerations. The following parts show highest inventory levels: CBW57-ES-20A-5H (2458 pcs), CBW57-ES-20A (1833 pcs), and CBW57-HS-20A-5X (1804 pcs). All substitute parts are functionally interchangeable within the specified electrical and mechanical parameters.
Frequently Asked Questions (FAQ)
Q: Can OptiFuse CBW57 series parts directly replace the Carling Technologies CLB-203-11ANN-R-F/20?
A: Yes. All listed OptiFuse CBW57 series parts meet the critical electrical parameters: 20A current rating, 250V AC voltage rating, thermal breaker type, push-to-reset actuation, single-pole configuration, and panel mount installation. The higher DC voltage rating (50V versus 32V) does not restrict substitution.
Q: What is the significance of the different part number suffixes in the CBW57 series (EJ, EL4, ES, HS, PB, PF, PL)?
A: The suffixes denote internal design variations and connector/terminal configurations within the CBW57 series. All variants listed maintain identical electrical specifications for current, voltage, and actuation. Selection among variants should be based on mechanical interface requirements and connector compatibility with the application circuit.
Q: Are there any voltage rating limitations when substituting the CLB-203-11ANN-R-F/20 with CBW57 parts rated at 50V DC?
A: No. The CBW57 parts rated at 50V DC are fully compatible with applications requiring 32V DC operation. The higher voltage rating provides additional safety margin and does not degrade performance at lower voltages.
Q: Do all substitute parts carry the same regulatory certifications as the original CLB-203-11ANN-R-F/20?
A: The substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. While the certification set differs slightly from the original part (which includes CE and TUV), both the original and substitute parts share UL 1077 and UL 1500 approvals, which are the primary thermal circuit breaker standards.
Q: What packaging format is available for the substitute parts?
A: All substitute parts are supplied in Bulk packaging, matching the packaging format of the CLB-203-11ANN-R-F/20.
Q: Are there inventory considerations when selecting among the substitute parts?
A: Yes. Inventory levels vary across the CBW57 variants. CBW57-ES-20A-5H maintains the highest inventory at 2458 pieces, followed by CBW57-ES-20A at 1833 pieces. Lower inventory variants include CBW57-PL-20A-5X (862 pcs) and CBW57-PF-20A-5X (994 pcs). Selection should account for project timeline and procurement lead time requirements.
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