The 2SC4977 is a 400V, 7A, Silicon NPN Power Transistor. A NPN transistor is a type of bipolar junction transistor (BJT) that consists of two p-type semiconductor materials separated by a single n-type material.
The µPD4723 is a high-breakdown voltage silicon gate CMOS line driver/receiver based on the EIA/TIA-232-E standard. The internal DC/DC converter can switch between multiple voltages, allowing it to operate with a single +3.3 V or +5 V power supply.
The IRF840PBF is a 500V 8A 125W TO220AB Package Third generation power MOSFETs from Vishay provide the designer with the best combination of fast switching, low on-resistance and cost-effectiveness.
The IRF540N is a 100V 30A To-220 Package Third generation power MOSFETs from Vishay provide the designer with the best combination of fast switching, ruggedized device design, low on-resistance and cost-effectiveness.