CLB-253-11BNN-B-A Equivalent & Substitute Parts

Part Overview

The CLB-253-11BNN-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 and carries multiple regulatory approvals including CE, cUL, TUV, UL1077, and UL1500 certifications. The device is ROHS3 compliant and REACH unaffected.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main component specifications, enabling direct replacement in applications where the core functional requirements remain constant.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	25A
Voltage Rating - AC	250V
Voltage Rating - DC	32V
Actuator Type	Push to Reset
Mounting Type	Panel Mount
Number of Poles	1
Illumination	None
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CLB-253-11BNN-B-A are identified from the OptiFuse CBW57 series based on the following critical parameters:

Matching Parameters:

Current Rating: 25A
Voltage Rating - AC: 250V
Breaker Type: Thermal
Actuator Type: Push to Reset
Mounting Type: Panel Mount
Number of Poles: 1
Illumination: None
RoHS Status: ROHS3 Compliant

Parameter Variance:

Voltage Rating - DC: Substitute parts are rated 50V DC, compared to the main part's 32V DC rating. This represents an increased DC voltage capability and does not restrict substitution in applications operating at or below 32V DC.

All substitute parts maintain Active product status and carry regulatory approvals compatible with the main component's application requirements.

Parameter Comparison

Parameter	CLB-253-11BNN-B-A (Carling)	CBW57-EJ-25A (OptiFuse)	CBW57-ES-25A (OptiFuse)	CBW57-ES-25A-5H (OptiFuse)	CBW57-PB-25A-5X (OptiFuse)	CBW57-PS-25A (OptiFuse)	CBW57-PS-25A-5X (OptiFuse)	CBW57-PS-25A-5XD (OptiFuse)
Breaker Type	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal
Current Rating (Amps)	25A	25A	25A	25A	25A	25A	25A	25A
Voltage Rating - AC	250V	250V	250V	250V	250V	250V	250V	250V
Voltage Rating - DC	32V	50V	50V	50V	50V	50V	50V	50V
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
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount
Number of Poles	1	1	1	1	1	1	1	1
Illumination	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
Product Status	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts from the OptiFuse CBW57 series meet the electrical and mechanical requirements for direct replacement of the CLB-253-11BNN-B-A in panel mount thermal circuit breaker applications rated at 25A and 250V AC.

Regulatory Compliance: The main part CLB-253-11BNN-B-A carries approvals from CE, cUL, TUV, UL1077, and UL1500. Substitute parts carry approvals from cURus, IP 40, SAE J1171, UL 1077, and UL 1500. Both component sets maintain ROHS3 compliance and REACH unaffected status.

DC Voltage Consideration: Substitute parts are rated for 50V DC compared to the main part's 32V DC rating. This increased DC voltage rating does not restrict substitution in circuits operating at or below 32V DC. Applications requiring operation above 32V DC and up to 50V DC benefit from the enhanced rating of substitute parts.

Inventory Availability: Substitute parts demonstrate consistent availability across multiple part number variants within the CBW57 series, with inventory levels ranging from 764 to 1681 pieces.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CLB-253-11BNN-B-A?

A: Yes. All CBW57 substitute parts match the critical electrical parameters: 25A current rating, 250V AC voltage rating, thermal breaker type, push-to-reset actuation, single-pole configuration, and panel mount design. The increased 50V DC rating of substitute parts does not restrict their use in applications operating at 32V DC or lower.

Q: What is the significance of the higher DC voltage rating on substitute parts?

A: The CBW57 series parts are rated for 50V DC, while the CLB-253-11BNN-B-A is rated for 32V DC. This represents an expanded DC operating range on the substitute parts. In applications operating at 32V DC or below, this difference does not affect compatibility or performance.

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

A: All listed CBW57 variants (CBW57-EJ-25A, CBW57-ES-25A, CBW57-ES-25A-5H, CBW57-PB-25A-5X, CBW57-PS-25A, CBW57-PS-25A-5X, CBW57-PS-25A-5XD) share identical electrical and mechanical specifications. Differences in part number suffixes reflect packaging, lead configuration, or internal design variants that do not affect the core functional parameters for thermal circuit breaker operation.

Q: Do substitute parts maintain the same regulatory certifications?

A: Both the main part and substitute parts carry UL 1077 and UL 1500 certifications. The main part includes CE, cUL, and TUV approvals, while substitute parts carry cURus, IP 40, and SAE J1171 approvals. Both component sets are ROHS3 compliant and REACH unaffected.

Q: What is the Moisture Sensitivity Level (MSL) for substitute parts?

A: All CBW57 substitute parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Q: Can I use substitute parts in existing designs without modification?

A: Yes. The substitute parts maintain identical mounting type (panel mount), actuator type (push to reset), pole configuration (1-pole), and current/AC voltage ratings. Panel mount dimensions and electrical interface compatibility are preserved across all listed substitutes.

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