Gideon Analytical Laboratories received two components for analysis. We received one 10TTS08S phase control silicon controlled rectifier (SCR) and an FDC6324L integrated load switch. A silicon controlled rectifier (SCR) is a four-layer solid-state current-controlling device. It consists of four layers of semiconductors, which form NPNP or PNPN structures have three P-N junctions labeled J1, J2 and J3, and three terminals. The anode terminal of an SCR is connected to the p-type material of a PNPN structure, and the cathode terminal is connected to the n-type layer, while the gate of the SCR is connected to the p-type material nearest to the cathode.