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 TB6612FNG is a motor driver red color module, it can control up to two DC motors at a constant current of 1.2A (3.2A peak). Two input signals (IN1 and IN2) can be used to control the motor in one of four function modes.
The 2SK3550, 2SK-3550, K3550, 3550 is a 900V 10A 300W TO-3PF Package of new generation of high voltage MOSFET. This is utilizing an advanced charge balance mechanism for outstanding low on-resistance and lower gate charge performance.