2SK4091 2SK4091(1)-S27 2SK4091(1)-S27-VB 2SK4091-ZK 2SK4091-ZK-E1 2SK4091-ZK-E1- 2SK4091-ZK-E1-AY 2SK4091-ZK-E1-AY/JM 2SK4091-ZK-E1-AY-VB 2SK4091-ZK-E2