The MagnaChip Semiconductor MDD1903 is an SCR (Silicon Controlled Rectifier) designed for use in discrete semiconductor products. It is mounted using through-hole technology and comes in a TO-220-3 package. The device has an off-state voltage of 400V, a non-repetitive surge current of 160A at 50/60Hz, and a maximum on-state current of 16A. The voltage on the gate trigger is 1.5V, and the current on the gate trigger is 30mA. The current holding rating is 40mA, and the on-state voltage is 1.7V. The device has a maximum off-state current of 10μA and can operate in temperatures ranging from -40°C to 125°C. The MDD1903 is a medium popularity component with a fake threat in the open market of 51%.