CLBA-253-NNFNN-B-A Equivalent & Substitute Parts

Part Overview

The CLBA-253-NNFNN-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 25A at 250V AC and 32V DC with push-to-reset actuation and panel mount configuration. This component is classified as Active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 approval agencies. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits equivalent component selection based on matching electrical and mechanical specifications.

Substiute Parts

CLBA-253-NNFNN-B-A

Carling TechnologiesIn Stock: 779CLBA-253-NNFNN-B-A Datasheet

Current PartRFQ

CBW57-EJ-25A

OptiFuseIn Stock: 1275CBW57-EJ-25A Datasheet

Parametric EquivalentRFQ

CBW57-ES-25A

OptiFuseIn Stock: 1624CBW57-ES-25A Datasheet

Parametric EquivalentRFQ

CBW57-ES-25A-5H

OptiFuseIn Stock: 1272CBW57-ES-25A-5H Datasheet

Parametric EquivalentRFQ

CBW57-PB-25A-5X

OptiFuseIn Stock: 834CBW57-PB-25A-5X Datasheet

Parametric EquivalentRFQ

CBW57-PS-25A

OptiFuseIn Stock: 1711CBW57-PS-25A Datasheet

Parametric EquivalentRFQ

CBW57-PS-25A-5X

OptiFuseIn Stock: 1263CBW57-PS-25A-5X Datasheet

Parametric EquivalentRFQ

CBW57-PS-25A-5XD

OptiFuseIn Stock: 1024CBW57-PS-25A-5XD Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are qualified based on the following critical parameters that must match or exceed the main part specifications:

Matching Parameters (Required for Substitution):

• Current Rating: 25A
• Voltage Rating - AC: 250V minimum
• Mounting Type: Panel Mount
• Breaker Type: Thermal
• Actuator Type: Push to Reset
• Number of Poles: 1
• Illumination: None

Allowable Variance:

• Voltage Rating - DC: Substitute parts rated at 50V DC exceed the 32V DC requirement and remain compatible within the application envelope

All identified substitute parts are manufactured by OptiFuse under the CBW57 series and meet or exceed the electrical and mechanical requirements of the CLBA-253-NNFNN-B-A. Each substitute maintains Active product status and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

All seven OptiFuse CBW57 series circuit breakers listed above are qualified substitutes for the CLBA-253-NNFNN-B-A. Selection among these alternatives is determined by application-specific requirements and availability:

Compliance Basis:

• All substitute parts maintain Active product status equivalent to the main part
• All substitute parts are ROHS3 compliant, matching the environmental compliance profile
• All substitute parts carry UL 1077 and UL 1500 certifications, aligning with the main part's approval agency requirements
• All substitute parts carry cURus certification, providing North American regulatory coverage

Electrical Equivalence:

• All substitute parts are rated 25A at 250V AC, matching the primary load-carrying specification
• All substitute parts are rated 50V DC, which exceeds the 32V DC requirement and provides enhanced margin for DC applications
• All substitute parts maintain single-pole, push-to-reset thermal actuation identical to the main part

Availability Consideration: The CBW57-PS-25A variant maintains the highest inventory level at 1,681 pieces, followed by CBW57-ES-25A at 1,612 pieces, providing optimal lead-time assurance for high-volume procurement.

Frequently Asked Questions (FAQ)

Q: Can OptiFuse CBW57 series parts directly replace the Carling Technologies CLBA-253-NNFNN-B-A?

A: Yes. All seven OptiFuse CBW57 variants listed meet the electrical and mechanical requirements for direct substitution. The 25A current rating, 250V AC voltage rating, panel mount configuration, thermal breaker type, push-to-reset actuation, and single-pole design are identical across all qualified substitutes.

Q: What is the significance of the higher 50V DC rating on the OptiFuse parts compared to the 32V DC rating on the Carling part?

A: The 50V DC rating on OptiFuse substitutes exceeds the 32V DC requirement of the main part. This higher rating provides additional safety margin in DC applications and does not create incompatibility. The substitute parts remain fully qualified for any application rated at or below 32V DC.

Q: Are there differences between the various CBW57 part numbers?

A: The CBW57 series variants differ in connector type and packaging configuration, indicated by the suffix designations (EJ, ES, PB, PS). These differences relate to mechanical interface and lead configuration rather than electrical performance. All variants maintain identical electrical specifications: 25A, 250V AC, 50V DC, thermal actuation, and push-to-reset operation.

Q: Do all substitute parts carry the same regulatory certifications as the main part?

A: All substitute parts carry UL 1077 and UL 1500 certifications matching the main part. OptiFuse substitutes additionally carry cURus and SAE J1171 certifications. All parts are ROHS3 compliant and REACH unaffected, maintaining equivalent environmental compliance profiles.

Q: What is the Moisture Sensitivity Level (MSL) for the OptiFuse substitutes?

A: All OptiFuse CBW57 variants are rated MSL 1 (Unlimited), indicating no moisture sensitivity constraints for storage, handling, or assembly processes.

Q: Can I use these parts interchangeably within the same application?

A: Yes, within the scope of the electrical and mechanical parameters specified. The 25A thermal circuit breaker function, 250V AC rating, 50V DC rating, panel mount configuration, and push-to-reset actuation are consistent across all qualified substitutes. Connector and lead configuration differences (indicated by part number suffixes) must align with the specific mechanical interface requirements of the target application.