CLB-033-27E3N-B-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CLB-033-27E3N-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 3A at 250V AC and 32V DC with push-to-reset actuation and panel mount configuration. This component is active in production and maintains full compliance with 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 while maintaining identical functional specifications.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	3A
Voltage Rating - AC	250V
Voltage Rating - DC	32V
Actuator Type	Push to Reset
Mounting Type	Panel Mount
Number of Poles	1
Illumination	None
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CLB-033-27E3N-B-A are qualified based on matching the following critical parameters: thermal breaker type, 3A current rating, 250V AC voltage rating, push-to-reset actuation mechanism, single-pole configuration, panel mount form factor, and absence of illumination. All substitute parts are manufactured by OptiFuse under the CBW57 series and maintain ROHS3 compliance and REACH unaffected status.

The substitute parts CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X share identical electrical and mechanical specifications with the main part across all critical parameters. These parts are direct functional equivalents suitable for interchangeable application in circuits requiring 3A thermal protection at 250V AC.

Parameter Comparison

Parameter	CLB-033-27E3N-B-A	CBW57-EJ-3A	CBW57-EL4-3A	CBW57-ES-3A	CBW57-PF-3A-5X	CBW57-PS-3A-1X
Manufacturer	Carling Technologies	OptiFuse	OptiFuse	OptiFuse	OptiFuse	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
Actuator Type	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount
Number of Poles	1	1	1	1	1	1
Illumination	None	None	None	None	None	None
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 substitute parts maintain active production status and full ROHS3 compliance. The CLB-033-27E3N-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, with UL 1077 and UL 1500 certifications common to both the main part and all substitutes.

Selection among the five substitute parts should be based on availability and supply chain requirements. All parts are functionally equivalent for applications requiring 3A thermal circuit protection at 250V AC with push-to-reset operation in panel mount configurations. The DC voltage rating differential (32V main part versus 50V substitutes) represents an enhanced capability in the substitute parts and does not restrict their use in applications specified for the main part.

Frequently Asked Questions (FAQ)

Q: Are the CBW57 series parts direct replacements for the CLB-033-27E3N-B-A?

A: Yes. All five CBW57 series parts match the CLB-033-27E3N-B-A across all critical electrical and mechanical parameters: 3A current rating, 250V AC voltage rating, thermal breaker type, push-to-reset actuation, single-pole configuration, and panel mount form factor. The higher DC voltage rating (50V versus 32V) in the substitutes provides enhanced capability without restricting application compatibility.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by matching: breaker type (thermal), current rating (3A), AC voltage rating (250V), actuator type (push to reset), mounting configuration (panel mount), pole count (1), and absence of illumination. All five substitute parts satisfy these criteria.

Q: Do all substitute parts carry the same regulatory approvals?

A: The main part CLB-033-27E3N-B-A carries CE, cUL, TUV, UL1077, and UL1500 approvals. The CBW57 series substitutes carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. Both the main part and all substitutes maintain UL 1077 and UL 1500 certifications. All parts are ROHS3 compliant and REACH unaffected.

Q: Is there a difference in packaging or inventory considerations among the substitute parts?

A: All parts are supplied in bulk packaging. Inventory levels vary: CLB-033-27E3N-B-A (1013 pcs), CBW57-EJ-3A (1203 pcs), CBW57-EL4-3A (1358 pcs), CBW57-ES-3A (1289 pcs), CBW57-PF-3A-5X (869 pcs), and CBW57-PS-3A-1X (1120 pcs). Selection may be influenced by availability requirements.

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

A: The CLB-033-27E3N-B-A is rated for 32V DC, while all CBW57 substitutes are rated for 50V DC. This difference indicates the substitute parts have a higher DC voltage capability. For applications operating at or below 32V DC, both the main part and substitutes are suitable. For applications between 32V and 50V DC, only the CBW57 substitutes are appropriate.

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