CLB-033-12C3N-B-A Equivalent & Substitute Parts

Part Overview

The CLB-033-12C3N-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 3A at 250V AC and 32V DC. This single-pole, panel-mount breaker features push-to-reset actuation and is designed for overcurrent protection in low-voltage applications. The part maintains active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	3A
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 for the CLB-033-12C3N-B-A are qualified based on the following criteria:

Electrical Parameters (Critical):

Current Rating: 3A (exact match required)
Voltage Rating - AC: 250V (exact match required)
Voltage Rating - DC: 50V (acceptable; exceeds 32V minimum requirement)

Mechanical Parameters (Critical):

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)

Compliance Parameters:

RoHS3 Compliant (required)
Product Status: Active (required)

All five substitute parts from OptiFuse (CBW57 series) meet these criteria. The DC voltage rating of 50V on substitute parts exceeds the 32V specification of the main part, providing additional operational margin within the same thermal breaker classification.

Parameter Comparison

Parameter	CLB-033-12C3N-B-A (Carling)	CBW57-EJ-3A (OptiFuse)	CBW57-EL4-3A (OptiFuse)	CBW57-ES-3A (OptiFuse)	CBW57-PF-3A-5X (OptiFuse)	CBW57-PS-3A-1X (OptiFuse)
Breaker Type	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal
Current Rating (Amps)	3A	3A	3A	3A	3A	3A
Voltage Rating - AC	250V	250V	250V	250V	250V	250V
Voltage Rating - DC	32V	50V	50V	50V	50V	50V
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount
Actuator Type	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset
Number of Poles	1	1	1	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All five OptiFuse CBW57 series parts are direct electrical and mechanical equivalents to the CLB-033-12C3N-B-A. Selection among these substitutes is based on:

Compliance Alignment:

CLB-033-12C3N-B-A carries CE, cUL, TUV, UL1077, and UL1500 certifications
All CBW57 substitutes carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications
Both part families meet UL 1077 and UL 1500 standards for thermal circuit breakers

Voltage Margin: The substitute parts rated at 50V DC provide 18V additional margin above the 32V DC specification of the main part, while maintaining identical AC voltage rating of 250V.

Inventory Availability: All substitute parts are in active production with confirmed stock levels ranging from 869 to 1358 pieces.

Moisture Sensitivity: All CBW57 substitutes carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace CLB-033-12C3N-B-A in existing designs?

A: Yes. All five CBW57 variants meet the electrical and mechanical requirements: 3A current rating, 250V AC voltage rating, 32V DC minimum voltage rating (CBW57 parts rated 50V DC), thermal breaker type, panel mount configuration, push-to-reset actuation, and single-pole design. RoHS3 compliance is maintained across all parts.

Q: What is the significance of the 50V DC rating on CBW57 parts versus the 32V DC rating on CLB-033-12C3N-B-A?

A: The 50V DC rating on substitute parts exceeds the 32V DC specification of the main part. This provides additional operational margin and does not restrict substitution in applications requiring 32V DC or lower. The higher rating ensures compatibility across a broader range of DC voltage applications.

Q: Are there differences among the five CBW57 substitute part numbers?

A: The five CBW57 variants (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, CBW57-PS-3A-1X) share identical electrical and mechanical specifications. Differences in part number suffixes reflect packaging, connector, or terminal configuration variations. All five are parametrically equivalent for thermal circuit breaker functionality at 3A, 250V AC, 50V DC.

Q: What certifications apply to substitute parts?

A: CBW57 series parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. Both the main part and substitutes meet UL 1077 and UL 1500 standards for thermal circuit breakers. The substitute parts do not carry CE or TUV certifications listed in the main part specification.

Q: Is REACH compliance status identical across all parts?

A: CLB-033-12C3N-B-A is REACH Unaffected. Three of the five CBW57 substitutes (CBW57-EJ-3A, CBW57-ES-3A, CBW57-PS-3A-1X) are confirmed REACH Unaffected. CBW57-EL4-3A and CBW57-PF-3A-5X do not have REACH status specified in the provided data.

Q: What is the inventory status for these parts?

A: CLB-033-12C3N-B-A: 1096 pieces. CBW57-EJ-3A: 1203 pieces. CBW57-EL4-3A: 1358 pieces. CBW57-ES-3A: 1289 pieces. CBW57-PF-3A-5X: 869 pieces. CBW57-PS-3A-1X: 1120 pieces. All parts are listed as new original stock.

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