Title: Core Components Description:

The core components contains elements that are critical for all OPC Classic applications to work. The core components should be deployed to all PCs where OPC Classic will be used.


This download includes the Core components binaries (*.DLL and *.EXE) - COM Proxy/Stub module, including OPCENUM.EXE. It also includes optional headers/libraries need to build OPC Classic applications in C++ or .NET.


License: OPC Redistributable Agreement of Use

OPC Foundation membership fees are used by the OPC Foundation for the continuous improvement of these components, which includes bug-fixes to the components and the .NET API/Stack.

Sample code/ Reference Implementations are provided to OPC Foundation Members as-is for the primary purpose of demonstration and educational purposes. OPC Foundation Members may use the OPC Foundation deliverables for their Product development. (Members are not permitted to distribute OPC Foundation Source code (see OPC Foundation license agreement)


Technical support is provided in the form of sample code and synopsis documentation. The OPC Foundation will soon have a forum where the OPC Foundation members and community provide “support” for the advancement and adoption of OPC technology.


Found a bug? Please report any bugs to our Mantis system. Click the "Tracking" tab for a list of current work items. We welcome your bug-fixes and kindly ask you to submit them via Mantis.


Have a Suggestion / Request for enhancement / New Features? Please Join an OPC Foundation Member Working Group (details may be found here). You may also submit requests to the OPC Foundation email address of. All suggestions become the property of the OPC Foundation.


Activities including bug-fixes and feature requests as reported in our Mantis bug-tracking system as described here.




Access: Registered User
VersionStatusDescriptionDate Posted
3.00.108ReleaseOPC Core Components Redistributables (ZIP/MSI/MSM)2019-12-20 Icon
2.01.108ReleaseOPC NET RCW (NuGet/ZIP)2020-08-06 Icon
VersionStatusDescriptionDate Posted
3.00.107DeprecatedInstallers and Merge Modules (ZIP/MSI/MSM)2018-01-30 Icon
3.0.105Release2012-12-31 Icon
3.0.102Release Icon
3.0.101Release Icon
3.0.100Release Icon Icon Icon Icon Icon Icon
1.12Release Icon
1.10Release Icon
1.05Release Icon
1.04Release Icon Icon
1.00Release Icon