Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SPM5A3B1B1NRS121 found under Power Supply by Power One Dc Power Supplies. The National Stock Number assigned to this part is 6130013479395, and the Federal Supply Class is 6130 Converters Electrical Non Rotating. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SPM5A3B1B1NRS121.