Teccor Electronics S4025L is a silicon-controlled rectifier (SCR) designed as a half‑wave, unidirectional gate‑controlled rectifier. It comes in a TO-220 (isolated) package with glass‑passivated junctions and a non‑sensitive gate configuration that simplifies drive requirements. As Teccor’s SCRs are now encompassed by Littelfuse, the S4025L remains a recognized part in the Littelfuse line of thyristors for power‑control applications.
