SK34SMA-3G-AQ Low Forward Voltage Schottky Diode

Diotec's SK34SMA-3G-AQ is a reverse-polarity protection diode that is designed for automotive electronic circuits. The diode operates on 12 V supply levels, which is used in traditional combustion engine cars and electric vehicles (EVs). For EVs, the convenience and infotainment systems run on a 12 V supply, as well as important circuits such as battery management systems (BMS) and battery disconnection units (BDU). The BMS takes care of the battery charging state and battery temperature, and balances the single cells.

The BDU disconnects the high-voltage battery for the motor drive and is supplied from the 12 V low-voltage system. These circuits consume 100 mA (typical) of current. The SK34SMA-3G-AQ offers a forward voltage drop of 390 mV (typical) at 1 A and +25°C. This reduces forward losses and junction temperature, increasing long-term reliability. The device has 40 V of reverse voltage, comes in a standard DO-214AC/SMA case outline, and is fully AEC-Q101-qualified.