040-3040 is an Elma Model, a specific type of passive diode supporting a voltage range of 6 to 36 volts. It is designed for use in automotive, industrial, and medical applications, including line and load protection, voltage regulation, and temperature compensation. This part features power dissipation of up to 8W, a reverse stand-off voltage of 5V, and thermal shutdown at 125 degrees Celsius. It is available in an SO-8 package and an SMD version with rear soldering pads for mounting.