CMB-033-27GNN-W-D/03 Equivalent & Substitute Parts

Part Overview

The CMB-033-27GNN-W-D/03 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 classified as Active product status and carries multiple international approvals including CE, cUL, TUV, UL1077, and UL1500 certifications. The device is ROHS3 compliant and REACH unaffected.

Substitute parts become necessary when the primary component experiences extended lead times, inventory constraints, or when design flexibility permits selection from alternative manufacturers while maintaining electrical and mechanical compatibility within specified parameters.

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

Substitution of the CMB-033-27GNN-W-D/03 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Current Rating: 3A
Voltage Rating - AC: 250V
Breaker Type: Thermal
Actuator Type: Push to Reset
Mounting Type: Panel Mount
Number of Poles: 1
Illumination: None

All identified substitute parts from OptiFuse (CBW57 series) maintain identical specifications for these mandatory parameters. The substitute parts operate at 50V DC, which exceeds the 32V DC requirement of the main part, providing additional voltage margin without compromising circuit protection characteristics. All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Parameter Comparison

Parameter	CMB-033-27GNN-W-D/03 (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
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
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All five OptiFuse CBW57 series circuit breakers (CBW57-EJ-3A, CBW57-EL4-3A, CBW57-ES-3A, CBW57-PF-3A-5X, and CBW57-PS-3A-1X) are direct parametric equivalents to the CMB-033-27GNN-W-D/03. Each substitute part maintains Active product status and carries relevant international certifications including cURus, UL 1077, and UL 1500 approvals.

The substitute parts are supplied in bulk packaging and demonstrate consistent inventory availability ranging from 869 to 1358 pieces. All substitute components are ROHS3 compliant with REACH unaffected status, ensuring regulatory compliance equivalent to the original Carling Technologies component.

The elevated DC voltage rating (50V versus 32V) on all substitute parts provides additional operational margin and does not compromise circuit protection performance in applications operating at or below 32V DC.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series circuit breakers directly replace the CMB-033-27GNN-W-D/03 in existing designs?

A: Yes. All five CBW57 variants maintain identical current rating (3A), AC voltage rating (250V), actuator type (push to reset), mounting configuration (panel mount), and pole count (1). The higher DC voltage rating (50V) on substitute parts is compatible with applications designed for 32V DC operation.

Q: What is the significance of the different CBW57 part number suffixes (EJ, EL4, ES, PF-5X, PS-1X)?

A: The suffixes denote different connector or terminal configurations within the CBW57 series. All variants maintain identical electrical specifications for current rating, voltage ratings, and actuation characteristics. Selection among these variants depends on specific connector or terminal requirements for the application.

Q: Are all substitute parts available in the same packaging format as the original CMB-033-27GNN-W-D/03?

A: The original part is specified with dash packaging notation. All substitute CBW57 parts are supplied in bulk packaging. Packaging format differences do not affect electrical or mechanical compatibility; they reflect distribution and handling specifications only.

Q: Do the OptiFuse CBW57 circuit breakers carry equivalent regulatory approvals to the Carling Technologies CMB-033-27GNN-W-D/03?

A: The substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. The original part carries CE, cUL, TUV, UL1077, and UL1500 certifications. Both component sets include UL 1077 and UL 1500 approvals. Specific application requirements may necessitate verification of additional certifications such as CE or TUV marking.

Q: What is the Moisture Sensitivity Level (MSL) for the substitute parts?

A: All CBW57 substitute parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are there inventory considerations when selecting among the five substitute options?

A: Inventory levels vary across the five CBW57 variants, ranging from 869 to 1358 pieces in stock. Selection based on connector configuration requirements should be cross-referenced with current inventory availability for procurement planning.

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