SSR-40DD Solid State Relay - TOOGOO(R)Single Phase Solid State Relay DC-DC SSR-40DD 40A DC3-32V DC5-60V White+Silver Product Name: Solid State Relay Material: Metal, Resin, Electric Parts Net Weight: 101g Solid State Relay ideal for automatic process control application, a must component for temperature controller and other machinery control system. Highly reliable,compact size designed to offer user maximum simplicity,fast switching, reduced electromagnetic interference.