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

Part Overview

The CLB-253-11ANN-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 25A at 250V AC and 32V DC. This single-pole, panel-mount device features push-to-reset actuation and holds Active product status. The breaker is designed for overcurrent protection in AC and DC applications requiring thermal response characteristics.

Substitute parts are necessary when the original CLB-253-11ANN-B-A becomes unavailable due to inventory constraints, extended lead times, or supply chain disruptions. Equivalent alternatives from OptiFuse maintain the critical electrical and mechanical parameters required for direct replacement in panel-mount circuit protection applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility for the CLB-253-11ANN-B-A is determined by the following critical parameters:

Mandatory Matching Parameters:

Current Rating: 25A
Voltage Rating - AC: 250V
Mounting Type: Panel Mount
Number of Poles: 1
Actuator Type: Push to Reset
Breaker Type: Thermal

Allowable Variation:

Voltage Rating - DC: The CLB-253-11ANN-B-A operates at 32V DC. All listed OptiFuse substitutes operate at 50V DC, which represents a higher voltage capability and is acceptable for applications requiring 32V DC operation.

All substitute parts listed are from the OptiFuse CBW57 series and maintain identical current, AC voltage, mounting configuration, pole count, and actuation characteristics. The increased DC voltage rating of substitute parts provides enhanced capability without compromising compatibility in 32V DC applications.

Parameter Comparison

Parameter	CLB-253-11ANN-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
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
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
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

Engineering Selection Recommendations

All listed OptiFuse CBW57 series circuit breakers are Active products with ROHS3 compliance and maintain full electrical and mechanical compatibility with the CLB-253-11ANN-B-A.

Compliance Certifications:

The CLB-253-11ANN-B-A 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 original and substitute parts meet UL 1077 and UL 1500 standards for thermal circuit breakers.

Inventory Availability:

CLB-253-11ANN-B-A: 967 units in stock
CBW57-PS-25A: 1681 units in stock
CBW57-ES-25A: 1612 units in stock
CBW57-PS-25A-5X: 1215 units in stock
CBW57-ES-25A-5H: 1216 units in stock
CBW57-EJ-25A: 1211 units in stock
CBW57-PB-25A-5X: 764 units in stock
CBW57-PS-25A-5XD: 962 units in stock

All substitute parts are available in quantities exceeding the original part inventory, providing reliable sourcing alternatives.

Frequently Asked Questions (FAQ)

Q: Can OptiFuse CBW57 series breakers directly replace the CLB-253-11ANN-B-A?

A: Yes. All listed OptiFuse CBW57 variants maintain identical current rating (25A), AC voltage rating (250V), mounting configuration (panel mount), pole count (1), and actuation type (push to reset). These are the critical parameters for direct substitution in thermal circuit breaker applications.

Q: Why do the OptiFuse substitutes have a higher DC voltage rating (50V vs. 32V)?

A: The 50V DC rating on OptiFuse CBW57 parts represents enhanced capability. A component rated for 50V DC operates safely at 32V DC. The higher rating does not affect performance in 32V DC circuits and provides additional design margin.

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

A: The CBW57 series variants (CBW57-EJ-25A, CBW57-ES-25A, CBW57-PB-25A-5X, CBW57-PS-25A, and their suffixed versions) share identical electrical specifications and thermal characteristics. Suffix designations indicate packaging, connector, or terminal configuration variations. Selection among these variants depends on specific panel-mount terminal requirements and mechanical interface specifications not detailed in this reference.

Q: Do all substitute parts meet the same regulatory standards?

A: All substitute parts are UL 1077 and UL 1500 certified, matching the original CLB-253-11ANN-B-A. OptiFuse parts carry additional cURus and SAE J1171 approvals. Both the original and substitutes are ROHS3 compliant.

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

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

Q: Are all substitute parts in Active product status?

A: Yes. All listed OptiFuse CBW57 variants maintain Active product status, ensuring continued availability and manufacturer support.

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