Description
Technical Specifications
| Parameter | Detail |
| Brand | ABB |
| Model | UFC921A101 (Part No. 3BHE024855R0101) |
| Series | INT-2 / Advant / Industrial Drive & Excitation Systems |
| Product Name | INT-2 Board / DC Power Module Controller |
| Country of Origin | Switzerland |
| Lifecycle Status | Industrial Support / Legacy Supported |
| Dimensions | Standard Eurocard PCB Form Factor (approx. 250 mm x 125 mm x 30 mm) |
| Weight | 1.19 kg |
| Manufacturing Location | Europe |
| Power Consumption | 15 W typical (Internal rack powered) |
Product Introduction
The ABB UFC921A101 (Part Number: 3BHE024855R0101), commonly designated as the varnished INT-2 board, is a high-performance control and interface module engineered for ABB’s heavy-duty industrial drive and excitation systems. Primarily deployed in systems such as the UNITOL 5000 excitation framework and high-power ACS frequency converters, this module acts as a core regulator and gate driver interface for power semiconductor components like IGBTs and thyristors. Featuring robust conformal coating (varnished finish) for enhanced environmental durability, high-speed signal processing capabilities, and precise voltage regulation, the UFC921A101 ensures maximum stability, efficiency, and reliability in critical power generation and heavy industrial applications.
Frequently Asked Questions
⚡ What is the primary function of the UFC921A101 controller board?
It functions as an INT-2 control and gate driver board, managing power module switching, signal acquisition, and voltage regulation within high-power drives and excitation systems.
🔌 Where is this specific controller board typically installed?
It is predominantly integrated into ABB industrial medium-voltage frequency converters (ACS series) and large-scale generator excitation systems (such as UNITOL 5000).
⚙️ Why does the module feature a “varnished” designation?
The conformal coating (varnish) protects sensitive electronic circuitry from moisture, dust, and corrosive airborne pollutants found in harsh industrial environments.
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