CLB-253-11A1B-W-A/25 Equivalent & Substitute Parts

Part Overview

The CLB-253-11A1B-W-A/25 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 single-pole breaker is designed for overcurrent protection in AC and DC applications and maintains Active product status with full regulatory compliance including CE, cUL, TUV, UL1077, and UL1500 certifications.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, enabling direct functional replacement in circuit protection applications where the primary part may be unavailable or when alternative sourcing is required.

Key Parameters

Parameter	Value
Current Rating	25A
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 for the CLB-253-11A1B-W-A/25 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

Current Rating: 25A (exact match required)
Voltage Rating - AC: 250V (exact match required)
Breaker Type: Thermal (exact match required)
Mounting Type: Panel Mount (exact match required)
Actuator Type: Push to Reset (exact match required)
Number of Poles: 1 (exact match required)
Illumination: None (exact match required)

Allowable Variation:

Voltage Rating - DC: The main part specifies 32V DC. Substitute parts rated at 50V DC are functionally equivalent, as higher DC voltage ratings provide equal or greater protection capability in applications requiring 32V DC operation.

All identified substitute parts are manufactured by OptiFuse under the CBW57 series and maintain Active product status with ROHS3 compliance and equivalent regulatory certifications (cURus, UL 1077, UL 1500).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Breaker Type	Mounting Type	Actuator Type	Poles	Product Status	RoHS Status	Inventory (Pcs)
CLB-253-11A1B-W-A/25	Carling Technologies	25	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	875
CBW57-EJ-25A	OptiFuse	25	250	50	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1211
CBW57-ES-25A	OptiFuse	25	250	50	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1612
CBW57-ES-25A-5H	OptiFuse	25	250	50	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1216
CBW57-PB-25A-5X	OptiFuse	25	250	50	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	764
CBW57-PS-25A	OptiFuse	25	250	50	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1681
CBW57-PS-25A-5X	OptiFuse	25	250	50	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1215
CBW57-PS-25A-5XD	OptiFuse	25	250	50	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	962

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the primary CLB-253-11A1B-W-A/25 part. The OptiFuse CBW57 series substitutes carry equivalent certifications including cURus, UL 1077, and UL 1500, meeting the same safety and performance standards as the Carling Technologies original.

The DC voltage rating differential (32V primary versus 50V substitutes) does not restrict substitution eligibility. A 50V DC rated breaker operates within specification for applications requiring 32V DC protection, as the higher rating provides equivalent or superior performance margins.

Selection among the seven available OptiFuse substitutes should be based on inventory availability and any application-specific mechanical interface requirements indicated by part number suffixes (such as -5H, -5X, or -5XD designations). All variants maintain identical electrical performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CLB-253-11A1B-W-A/25?

A: Yes. All seven identified OptiFuse CBW57 variants meet the critical electrical and mechanical parameters: 25A current rating, 250V AC voltage rating, thermal breaker type, panel mount configuration, push-to-reset actuation, and single-pole design. The 50V DC rating on substitutes is functionally equivalent for 32V DC applications.

Q: What is the significance of the DC voltage rating difference?

A: The main part is rated 32V DC while substitutes are rated 50V DC. A higher DC voltage rating indicates the component can safely operate at the specified voltage without degradation. Substitutes rated at 50V DC are suitable for applications requiring 32V DC protection.

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

A: The 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 specifications. Part number suffixes indicate mechanical or packaging variations. Selection should be based on specific application requirements and available inventory.

Q: Do all substitutes carry the same regulatory certifications?

A: All OptiFuse CBW57 substitutes carry cURus, UL 1077, and UL 1500 certifications. The primary CLB-253-11A1B-W-A/25 carries CE, cUL, TUV, UL1077, and UL1500 certifications. Both sets include UL 1077 and UL 1500, ensuring core safety compliance alignment.

Q: What inventory levels are available for each substitute?

A: Inventory quantities vary: CBW57-PS-25A (1681 pcs), CBW57-ES-25A (1612 pcs), CBW57-ES-25A-5H (1216 pcs), CBW57-PS-25A-5X (1215 pcs), CBW57-EJ-25A (1211 pcs), CBW57-PS-25A-5XD (962 pcs), and CBW57-PB-25A-5X (764 pcs). The primary part CLB-253-11A1B-W-A/25 has 875 pcs in stock.

Q: Are all parts ROHS3 compliant?

A: Yes. The primary part and all seven substitute parts are ROHS3 compliant, meeting environmental and hazardous substance restrictions.

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