SiS178LDN N-Channel 70V (D-S) MOSFETs Vishay / Siliconix SiS178LDN N-Channel 70V (D-S) MOSFETs is offered in a PowerPAK® 1212-8 single package and implements TrenchFET® Gen IV technology. The SiS178LDN MOSFETs provide a very low RDS x Qg figure-of-merit (FOM). The Vishay / Siliconix SiS178LDN N-Channel 70V (D-S) MOSFETs are designed for synchronous rectification, primary-side switch, DC/DC converter, motor drive control, and load switch applications.