Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WS 57C49C-55DMB found under Microcircuit Memory by Insight Direct Usa Inc. The National Stock Number assigned to this part is 5962014815046, and the Federal Supply Class is 5962 Microcircuits Electronic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WS 57C49C-55DMB.