CLB-253-12CNN-R-A Equivalent & Substitute Parts

Part Overview

The CLB-253-12CNN-R-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 25A at 250V AC and 32V DC with push-to-reset panel mount actuation. 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 become necessary when the primary part experiences extended lead times, inventory constraints, or when design flexibility permits selection from alternative manufacturers meeting identical electrical and mechanical specifications. The CLB-253-12CNN-R-A has documented substitute options within the OptiFuse CBW57 series that maintain functional equivalence across critical parameters.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility for the CLB-253-12CNN-R-A is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

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

Acceptable Variance:

Voltage Rating - DC: The CLB-253-12CNN-R-A operates at 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 designation and maintain full compliance with ROHS3 requirements and regulatory certifications (cURus, UL 1077, UL 1500, SAE J1171).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Mounting Type	Breaker Type	Actuator Type	Poles	RoHS Status	Inventory (Pcs)
CLB-253-12CNN-R-A	Carling Technologies	25	250	32	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	837
CBW57-EJ-25A	OptiFuse	25	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	1211
CBW57-ES-25A	OptiFuse	25	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	1612
CBW57-ES-25A-5H	OptiFuse	25	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	1216
CBW57-PB-25A-5X	OptiFuse	25	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	764
CBW57-PS-25A	OptiFuse	25	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	1681
CBW57-PS-25A-5X	OptiFuse	25	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	1215
CBW57-PS-25A-5XD	OptiFuse	25	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	962

Engineering Selection Recommendations

All substitute parts listed maintain active product status and full regulatory compliance. Selection among the CBW57 series alternatives should be based on the following criteria:

Regulatory Compliance: All substitute parts hold cURus, UL 1077, and UL 1500 certifications, meeting or exceeding the approval standards of the original CLB-253-12CNN-R-A (CE, cUL, TUV, UL1077, UL1500).

Inventory Availability: The CBW57 series demonstrates higher stock levels across all variants, with CBW57-ES-25A offering maximum availability at 1612 pieces, compared to 837 pieces for the CLB-253-12CNN-R-A.

Environmental Compliance: All substitute parts are ROHS3 compliant and REACH unaffected, maintaining equivalent environmental standards to the original part.

Voltage Rating Consideration: The 50V DC rating on all CBW57 variants exceeds the 32V DC requirement of the CLB-253-12CNN-R-A, providing enhanced DC voltage margin without functional compromise in applications operating at or below 32V DC.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series breakers directly replace the CLB-253-12CNN-R-A in existing designs?

A: Yes. All CBW57 variants listed maintain identical current rating (25A), AC voltage rating (250V), mounting configuration (panel mount), actuation method (push to reset), and pole count (1). The higher DC voltage rating (50V versus 32V) does not prevent substitution in applications operating at 32V DC or lower.

Q: What is the significance of the different CBW57 part number suffixes (EJ, ES, PB, PS)?

A: The suffixes denote internal design variations within the CBW57 series. All variants maintain the same electrical specifications (25A, 250V AC, 50V DC) and mechanical compatibility. Suffix differences reflect manufacturing or packaging variations that do not affect functional equivalence for the stated application parameters.

Q: Are there any certifications or compliance differences between the CLB-253-12CNN-R-A and CBW57 substitutes?

A: Both the original part and all substitutes hold UL 1077 and UL 1500 certifications. The CBW57 series additionally holds cURus and SAE J1171 certifications. All parts are ROHS3 compliant. The substitute parts meet or exceed the regulatory requirements of the original part.

Q: Does the 50V DC rating on CBW57 parts affect performance in 32V DC applications?

A: No. A higher voltage rating indicates the component can safely operate at higher voltages without degradation. In applications requiring 32V DC operation, a 50V DC rated breaker functions identically to a 32V DC rated breaker, with additional voltage margin.

Q: What packaging format is used for these circuit breakers?

A: All parts listed, including the CLB-253-12CNN-R-A and all CBW57 variants, are supplied in bulk packaging suitable for direct integration into panel mount assemblies.

Q: Are there inventory or lead time advantages to selecting a CBW57 substitute?

A: Yes. The CBW57 series demonstrates higher aggregate inventory levels. CBW57-ES-25A, CBW57-PS-25A, and CBW57-PS-25A-5X each maintain stock levels exceeding 1200 pieces, providing improved availability compared to the CLB-253-12CNN-R-A at 837 pieces.

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