Super Junction-MOS EN & KN MOSFETs ROHM Semiconductor Super Junction-MOS EN and KN MOSFETs combine the low-noise characteristics of planar MOSFETs and the low ON-resistance characteristics of Super Junction MOSFETs. The EN series is offered in 600V and 650V versions and is recommended for power supply circuits requiring noise countermeasures. The fast-switching KN series is offered in 600V, 650V, and 800V variants and is recommended for power supply circuits demanding lower loss and greater efficiency.