The MPS11-MS18O-R with Electrical Switches Through Hole RoHS is an electronic part manufactured by Legion. This part is a mechanical switch with through hole mounting and RoHS certification, which makes it compatible with most circuit boards. It is a SPDT (Single Pole Double Throw) switch, meaning it has three terminals known as COMMON, NC (Normally Closed) and NO (Normally Open). The switch operates in an ON-OFF state, and is designed for easy manual operation. The switch is suitable for a variety of applications such as lighting control, motor control, temperature control and more. With a maximum current rating of 10 amps, the MPS11-MS18O-R is a versatile and reliable mechanical switch for any application.