On the PCB board, there are a lot of silkscreen, such as R107, C118, Q102, D202, etc.. What do these letters mean do you know? In fact, the letters on the PCB board indicates the abbreviation of the electronic components, in the letters are often followed by the numbers, these numbers also have a meaning.
The meaning of some letters on the PCB board
B:Buzzer
C: Capacitor
D: Diode
F: Fuse
J: Jumper wire
L:Inductance
Q: Triode
R: Resistor
RT: Thermistor
T: Transformer
U: chip, integrated circuit (IC)
W: voltage regulator
Y: crystal oscillator
PCB board often see R107, C118, Q102, D202 and other numbers, in general, the first letter identifies the device category, such as R for resistors, C for capacitors, D for diodes, Q for transistors, etc.; The second is the number, indicating the circuit function number, such as “1” for the motherboard circuit, “2” for the power supply circuit, etc., which is determined by the circuit designer; the third and fourth bit indicates that the device in the board of similar devices on the serial number.
Grande specializes in providing overall PCBA electronic manufacturing services, including PCB design, upstream electronic components procurement to PCB production and processing, SMT placement, DIP plug-in, PCBA testing, finished product assembly and other one-stop services.
The company gives full play to its competitive advantages in scale procurement and quality control, and has signed long-term cooperation agreements with many domestic and global electronic component manufacturers to ensure the quality and stable supply of raw material sources and transfer the benefits to customers.
Long-term procurement advantages in IC, resistors, capacitors, inductors, diodes and other components can greatly save customers’ inventory costs, improve production turnaround efficiency and save time. At present, we provide PCBA processing services for customers in USA, UK, Japan, Russia, France, Canada, Australia, Romania, Switzerland and other countries and regions.
We provide PCBA processing services, starting from PCB board fabrication, our own PCB manufacturer (with extremely strict TS16949 certification for the automotive industry), focusing on the quality of the board and PCBA quality control system.
Due to decades of experience in procurement of electronic components, we maintain long term cooperation with large brands to ensure the original packaging of components and procurement channels. In the encapsulation process of components, we choose Senju and Loctite solder paste to ensure the reliability of the soldering, with automatic printing machine, Panasonic high-speed placement machine, upper and lower eight temperature zone reflow soldering, AOI automatic optical detector, etc., which can effectively ensure the reliability and quality of the electronic packaging process.
In addition, the perfect management process of IPC, IPQC, OQA, etc., with clear job responsibilities and strict implementation of IPC electronic assembly acceptance standards. Regarding PCBA testing, we have professional engineers to perform 100% batch testing using various test stands, including pathway, noise, amplitude, signal, temperature, humidity, drop or execute customer’s detailed test program. All efforts aim to be a fine PCBA processing manufacturer.