KTC2026-Y-U/P KTC2026-Y-U/P F KTC2026-Y-U/P 贴片二极管 KTC2026-Y-U/PF KTC2026-Y-U/PFV KTC2026-Y-U/PW KTC2027 KTC2027-Y KTC2027-Y-U/P KTC2027-Y-U/PF