The 19.2M-49S-SR part of SR Passives is a silicon-controlled rectifier (SCR) semiconductor device. It is designed for high-current, low-voltage applications, and it is rated for 19.2 milliamperes (mA) of maximum current and a reverse voltage of 49 volts (V). It is manufactured in a standard 8-pin DIP package and is suitable for use in power supplies, AC/DC and DC/DC circuits, and other applications that require fast switching and reverse voltage protection.