The electronic part SMF30CA is a bi-directional transient voltage suppression (TVS) diode manufactured by GOODWORK. It has a SOD-123FL package, and is RoHS-compliant. Its maximum current rating is 4.1 amps, and it offers a unidirectional peak pulse power dissipation of 1uA at 48.4V, 33.3V, 30V and 36.8V.