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CLBA-203-NNFNN-B-A Circuit Breaker Equivalent & Substitute Parts
Part Overview
The CLBA-203-NNFNN-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 breaker features push-to-reset actuation and is designed for overcurrent protection in industrial and commercial applications. The product maintains active status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are identified to provide design flexibility, inventory optimization, and supply chain alternatives while maintaining equivalent electrical and mechanical performance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Carling Technologies |
| Series | CLB |
| Current Rating | 20A |
| Voltage Rating - AC | 250V |
| Voltage Rating - DC | 32V |
| Breaker Type | Thermal |
| 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 are qualified based on matching the following critical parameters:
- Current Rating: 20A
- Voltage Rating - AC: 250V
- Voltage Rating - DC: 50V (OptiFuse CBW57 series variants operate at 50V DC, which exceeds the 32V DC requirement)
- Breaker Type: Thermal
- Mounting Type: Panel Mount
- Actuator Type: Push to Reset
- Number of Poles: 1
- Illumination: None
- Product Status: Active
- RoHS Compliance: ROHS3 Compliant
All substitute parts are from the OptiFuse CBW57 series. The DC voltage rating differential (50V DC for substitutes versus 32V DC for the main part) represents an uprated specification that maintains compatibility in applications requiring the original 32V DC rating. All substitutes maintain identical AC voltage rating, current capacity, thermal breaker operation, panel-mount configuration, and push-to-reset functionality.
Parameter Comparison
| Parameter | CLBA-203-NNFNN-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 |
| Breaker Type | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal |
| 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 listed OptiFuse CBW57 series circuit breakers qualify as parametric equivalents to the CLBA-203-NNFNN-B-A based on matching electrical ratings, thermal operation, panel-mount configuration, and push-to-reset actuation. The substitute parts maintain active product status and ROHS3 compliance, ensuring continued availability and regulatory conformance.
The OptiFuse CBW57 variants carry approval certifications including cURus, IP 40, SAE J1171, UL 1077, and UL 1500. These certifications overlap with the Carling Technologies part's UL1077 and UL1500 designations, providing equivalent safety and performance validation for industrial and commercial circuit protection applications.
The DC voltage rating of 50V on OptiFuse substitutes exceeds the 32V DC specification of the original part. This uprated specification ensures compatibility in all applications designed for the CLBA-203-NNFNN-B-A and provides additional margin for DC circuit protection scenarios.
All substitute parts are available in bulk packaging with inventory quantities ranging from 862 to 2458 pieces, supporting both prototype and production-volume requirements.
Frequently Asked Questions (FAQ)
Q: Can OptiFuse CBW57 series breakers directly replace the Carling Technologies CLBA-203-NNFNN-B-A?
A: Yes. The OptiFuse CBW57 variants match all critical electrical parameters: 20A current rating, 250V AC voltage rating, thermal breaker operation, single-pole configuration, and push-to-reset actuation. The 50V DC rating on OptiFuse parts exceeds the 32V DC requirement, maintaining compatibility across all specified applications.
Q: What is the significance of the different DC voltage ratings?
A: The CLBA-203-NNFNN-B-A operates at 32V DC, while OptiFuse CBW57 substitutes are rated for 50V DC. The higher DC rating on substitute parts represents an uprated specification that maintains full compatibility with the original 32V DC requirement while providing additional voltage margin for circuit protection.
Q: Are the approval certifications equivalent between the main part and substitutes?
A: The CLBA-203-NNFNN-B-A carries CE, cUL, TUV, UL1077, and UL1500 certifications. OptiFuse CBW57 variants carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. Both part families include UL1077 and UL1500 validation, confirming equivalent safety standards for thermal circuit breaker operation.
Q: What packaging options are available for the substitute parts?
A: All substitute parts are supplied in bulk packaging. Inventory availability ranges from 862 to 2458 pieces per part number, supporting both small-scale and high-volume procurement requirements.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All OptiFuse CBW57 series substitutes maintain ROHS3 compliance, matching the environmental and material composition standards of the original CLBA-203-NNFNN-B-A.
Q: Which OptiFuse CBW57 variant should be selected if inventory is a primary consideration?
A: CBW57-ES-20A-5H offers the highest inventory availability at 2458 pieces. CBW57-HS-20A-5X provides 1804 pieces, and CBW57-ES-20A offers 1833 pieces. All three variants maintain identical electrical specifications and certifications.
Q: Do the substitute parts maintain the same mounting footprint as the original part?
A: All substitute parts are panel-mount thermal circuit breakers with push-to-reset actuation, matching the mechanical mounting configuration of the CLBA-203-NNFNN-B-A. Specific mounting dimensions should be verified against individual part datasheets for precise installation requirements.
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