Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BSC3821 found under Transformer Pulse by Viasys Respiratory Care Inc. The National Stock Number assigned to this part is 5950006306954, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BSC3821.