CLB-053-12CNN-B-A Equivalent & Substitute Parts

Part Overview

The CLB-053-12CNN-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 5A at 250V AC and 32V DC. This single-pole, push-to-reset panel mount breaker is designed for overcurrent protection in low-voltage DC and AC applications. The part maintains Active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits equivalent component selection.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	5A
Voltage Rating - AC	250V
Voltage Rating - DC	32V
Mounting Type	Panel Mount
Actuator Type	Push to Reset
Number of Poles	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are qualified based on strict electrical and mechanical parameter matching. All identified substitutes maintain the following core parameters identical to the CLB-053-12CNN-B-A:

Current Rating: 5A
Voltage Rating - AC: 250V
Mounting Type: Panel Mount
Breaker Type: Thermal
Actuator Type: Push to Reset
Number of Poles: 1
RoHS Status: ROHS3 Compliant

All substitute parts are manufactured by OptiFuse under the CBW57 series. The DC voltage rating for substitute parts is 50V, which exceeds the 32V DC specification of the primary part. This higher DC rating provides additional design margin and does not restrict application in circuits rated for 32V DC operation.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage AC	Voltage DC	Mounting Type	Breaker Type	Actuator Type	Poles	RoHS Status
CLB-053-12CNN-B-A	Carling Technologies	5	250V	32V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant
CBW57-EJ-5A	OptiFuse	5	250V	50V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant
CBW57-EL4-5A	OptiFuse	5	250V	50V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant
CBW57-ES-5A	OptiFuse	5	250V	50V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant
CBW57-PF-5A-5X	OptiFuse	5	250V	50V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant
CBW57-PL-5A-5X	OptiFuse	5	250V	50V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant
CBW57-PS-5A	OptiFuse	5	250V	50V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant
CBW57-PS-5A-1X	OptiFuse	5	250V	50V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant
CBW57-PS-5A-5X	OptiFuse	5	250V	50V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant
CBW57-PS-5A-W	OptiFuse	5	250V	50V	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and comply with international safety standards. The CBW57 series from OptiFuse carries cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications, providing equivalent regulatory coverage for thermal circuit breaker applications.

The primary distinction among substitute options relates to connector or terminal configuration, indicated by suffix variations (EJ, EL4, ES, PF, PL, PS, PS-1X, PS-5X, PS-W). These suffixes denote mechanical interface differences that do not affect electrical performance or substitution eligibility when panel mount compatibility is confirmed.

All substitute parts are REACH Unaffected and carry EAR99 ECCN classification, matching the regulatory profile of the primary part. Inventory availability across the CBW57 series ranges from 798 to 5629 units, providing supply flexibility for production requirements.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CLB-053-12CNN-B-A in existing designs?

A: Yes, all listed CBW57 substitutes maintain identical electrical ratings for current (5A), AC voltage (250V), mounting configuration (panel mount), and control function (push-to-reset thermal breaker). The higher DC voltage rating (50V versus 32V) does not restrict application in 32V DC circuits. Physical mounting compatibility must be confirmed based on panel cutout and terminal configuration.

Q: What do the suffix designations (EJ, EL4, ES, PF, PL, PS, PS-1X, PS-5X, PS-W) indicate?

A: Suffix designations identify connector or terminal type variations within the CBW57 series. These mechanical interface differences do not affect electrical substitution criteria. Selection among these variants depends on panel mount terminal requirements and connector compatibility with existing wiring harnesses.

Q: Is the 50V DC rating of CBW57 parts a limitation for 32V DC applications?

A: No. The 50V DC rating represents the maximum voltage specification for the substitute part. Operation at 32V DC is within the rated envelope and does not present a technical constraint. Higher voltage ratings provide additional design margin without compromising performance in lower-voltage applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All CBW57 series substitutes carry ROHS3 Compliant status, matching the environmental compliance profile of the CLB-053-12CNN-B-A.

Q: What certifications apply to the substitute parts?

A: CBW57 series parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. These standards cover thermal circuit breaker safety and performance requirements equivalent to the CE, cUL, TUV, UL1077, and UL1500 certifications of the primary part.

Q: Which substitute part has the highest inventory availability?

A: CBW57-ES-5A maintains the highest inventory level at 5629 units in stock.

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