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The ABB 1VCF751021802 (Main Board 5 Basic) is the primary logic processing and control motherboard engineered for ABB’s specialized power system protection relays, such as the Relion 615 series (REF615, REM615, RED615).
Manufacturer: ABB
Model Name Designation: Main Board 5 (Basic) / MB5
Global Part Number / Product ID: 1VCF751021802
Device Classification: Protection Relay Main CPU & Logic Motherboard
Direct Successor Code (New Part ID): 1VCR014629802 (Mainboard 6 / MB6)
International Customs Tariff Number (HS Code): 85235210
Device Status: Replaced / Available primarily as a direct exchange or quote-only spare
Product Net Weight: 0.27 kg
Country of Origin: Malaysia
Environmental Lifecycle Matrix: Product classified outside general WEEE scope
If you are ordering a modern Mainboard 6 (1VCR014629802) to replace an older Main Board 5 (1VCF751021802), the relay's physical top panel assembly must be replaced simultaneously. Select the replacement top panel from the following approved manufacturer codes based on your specific relay frame geometry.

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