Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U18-3103 found under Semiconductor Device Diode by Ksw Electronics Corp. The National Stock Number assigned to this part is 5961012286685, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like U18-3103.