GE IS200DAMAG1BBB is a Mark VI Speedtronic printed circuit board that functions as a snubber card.

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That’s partially correct based on its common trade names, but the precise technical function of the GE IS200DAMAG1BBB is that of a Gate Drive Amplifier and Interface Board (functional acronym DAMA).¹

While it is frequently marketed and referred to as a “Snubber Control Board” or “Snubber Board” due to its proximity and role in protecting the high-power switching devices, its primary electronic function is amplification and interface.²

⚙️ Primary Function: Gate Drive Amplification

The IS200DAMAG1BBB is a critical component used in GE Innovation Series Low Voltage Drives which integrate with the broader Mark VI Speedtronic Turbine Control System.³

• Gate Driver Amplifier: Its main role is to take the low-power logic control signals from the central drive control board (like the Bridge Personality Interface Assembly, BPIA) and amplify them into the precise, high-current pulses required to rapidly and reliably switch the gates of the external Insulated Gate Bipolar Transistor (IGBT) modules.⁴
• Interface: It serves as the physical and electrical interface between the sensitive control electronics and the rugged, high-voltage IGBT power modules.⁵
• Protection: The components on the board, and its physical design, are essential for ensuring the correct switching characteristics. This implicitly includes a protective function by preventing damaging conditions like “shoot-through” and managing electrical transients, which is why it is often referred to as a “Snubber Board” in the commercial market. Snubber circuits (composed of resistors, capacitors, and sometimes diodes) are specifically designed to suppress voltage transients across a switching device.⁶

📋 Key Technical Details

The letters ‘BBB’ in the part number signify a specific revision level and assembly configuration of the base IS200DAMA board.