1 Form A Photovoltaic Relay in a 6-pin SMT Package 400 V, 140 mA AC/210 mA DC single-pole Photovoltaic Relay in a 6-pin SMT Package. This normally open solid-state relay can replace electromechanical relays in many applications. The PVU414 is ideally suited for instrumentation, multiplexing, scanning and data acquisition applications. It offers high operating speed, low thermal offset (EMF) voltage, low and stable on-state resistance and high off-state resistance.