Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MCD56-12IO8 found under Semiconductor Devic by Unitron Industries Inc. The National Stock Number assigned to this part is 5961014681274, 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 MCD56-12IO8.