The LL4148 with LL-34 Switching Diode ROHS manufactured by Doshare is a small-signal diode that is commonly used to protect circuits from over voltage. It has a flat, through-hole design with a maximum reverse voltage of 50V and forward current of up to 200mA. It also has a fast switching time of 25ns. This diode is RoHS Compliant and is used in multiple applications such as in audio circuits, power supply circuits, and computer circuits.