This is a simple, very common rectifier diode. Often used for reverse voltage protection, the 1N4001 is a staple for many power, DC to DC step up, and breadboard projects. 1N4001 is rated for up to 1A/50V. If you need a bunch of these, you can get good bulk discounts on Digikey, part # : 1N4001-TPMSCT-ND Documents:Datasheet https://elecena.pl/product/15076291/diode-rectifier-1a-400v-1n4004 2018-08-03 https://elecena.pl/product/15076291/diode-rectifier-1a-400v-1n4004 2018-11-21 https://elecena.pl/product/15076291/diode-rectifier-1a-400v-1n4004 2018-11-27 https://elecena.pl/product/15076291/diode-rectifier-1a-400v-1n4004 2022-10-27 https://elecena.pl/product/15076291/diode-rectifier-1a-400v-1n4004 2023-08-22 https://elecena.pl/product/15076291/diode-rectifier-1a-400v-1n4004 2025-04-11 https://elecena.pl/product/15076291/diode-rectifier-1a-400v-1n4004 2025-04-14 https://elecena.pl/product/15076291/diode-rectifier-1a-400v-1n4004 2025-04-16