Si74 MOSFETs Vishay Si74 MOSFETs feature TrenchFET® technology that lowers the on-resistance, ensuring reliability and performance in a 30V to 250V range. The N- and P-channel MOSFETs are halogen-free under the IEC 61249-2-21 definition. Housed in the PowerPAK® package, these MOSFETs boast low thermal resistance, compact size, and a slim 1.07 mm profile, making them ideal for applications where space and thermal management are critical.