Si71 MOSFETs Vishay Si71 MOSFETs feature TrenchFET® Gen III Power MOSFET technology in low thermal resistance PowerPAK® 1212-8 and PowerPak SO-8 packages. The MOSFETs are 100% Rg and UIS tested, ensuring reliability and performance. The N- and P-channel MOSFETs are halogen-free under the IEC 61249-2-21 definition. These compact MOSFETs are ideal for applications where space and thermal management are critical.