About Us Services Technical Contact Us Bill of Materials Guide PPSI Technical Resources | Article #02 | Published: April 19, 2016 Summary In this article we'll explore the all-important Bill of Materials (BOM), what it is, what it's used for and some common mistakes that can be avoided when sending it to your contract manufacturer. PCB data packages often contain dozens of files in multiple formats. It may seem daunting, but when you break it down, only the three following pieces of data are required to build a printed circuit board assembly from scratch. There can obviously be countless other forms of data and files containing additional information, but we'll focus on these for now. Bill of Materials Gerber Files (RS-274X) Pick and Place / XY Coordinates / Centroid Data Components and Where They Go At its core, a Bill of Materials is simply a list of components and where they are supposed to go. Let's take a look at an example of one. ID Qty Part# Mfg Mfg PN Description UM Designators 1 3 EX-87 AVX 08055C103KAT2A CAP, CER, 0.01 UF, X7R, 10%, 50V, 0805 Ea C1, C2, C3 2 10 EX-177 AVX 08053A102KAT2A CAP, CER, 1000 PF, NPO, 10%, 25V, 0805 Ea C4-C13 3 4 EX-191 Kemet C1210C106K5RACTU CAP, CER, 10 UF, X7R, 10%, 50V, 1210 Ea C14 4 1 EX-11 KOA RK73H2ATTD4642F RES, THK FLM, 46.4K, 1%, 100V, 0805 Ea R1 5 10 EX-11 KOA RK73H2ATTD1003F RES, THK FLM, 100K, 1%, 100V 0805 Ea R2-R11 6 1 EX-244 Molex 22-05-3031 CONN, HDR, 0.1 SP, 3 POS, R/A Ea J1 7 2 EX-12 Fairchild LL4148 DIODE, 100V, 200MA, LL4148, SOD80 Ea D1, D2 8 1 EX-180 TI TL331IDBV IC, COMPARATOR, SINGLE, TL331IDBV, SOT23-5 Ea U1 9 1 EX-767 Analog Devices ADSP-BF561SBBZ600 IC, MCU, BLACKFIN 600MHZ DUAL-CORE PBGA297 ROHS Ea U2 About Us Services Provided Capabilities Equipment List Prototypes Testimonials FAQ Conflict Minerals Contact Us Phone (281) 933-9427 10905 Brooklet Drive, Houston, Texas, 77099 © 2021 Professionalized Products and Services, Inc. (PPSI) Follow Us: