In this article, FS Technology will explain in detail the types of PCB components and different types of packaging techniques, hoping to help you improve your PCB assembly technology. The following is the content of this article:
Classification of printed circuit board components
Diode is a very common PCB component. It has four colors: red, yellow, green and blue. According to the brightness, FS Tech divides it into three grades: normal, high and super bright. Light-emitting diodes test the purchasing ability of PCB assembly companies very much. Three kinds of diodes like 0805, 1206 and 1210 are difficult to buy, unless it is a one-stop PCB manufacturing company with PCB component purchasing ability like FS Technology.
We generally divide capacitors into two types: non-polar and polar. It is relatively easy to purchase capacitors, especially 0805 and 0603, which are very common non-polar capacitors on the market. Polar capacitors refer to electrolytic capacitors, which are very common in displays such as TVs and computers. It is what we usually call electrolytic capacitors. In our life, the most used aluminum electrolytic capacitors. Since the electrolyte is aluminum, its temperature stability and accuracy are not very high, and the chip components need high temperature stability because they are close to the circuit board. Therefore, the chip capacitors are mostly tantalum capacitors. SMD capacitors can be divided into four series A, B, C and D according to their different withstand voltages. The specific division is as follows:
A 3216 10V
B 3528 16V
C 6032 25V
D 7343 35V
Resistors: Similar to non-polar capacitors, the most common two are 0805 and 0603. The difference is that they can appear as exclusions, 4 and 8. The specific package style can refer to the MD16 simulation version, or you can check the internal PCB library of the design institute.
Note: The four package forms of A\B\C\D are L X S X H
The specific dimension of the 1210 is the same as the electrolytic capacitor B type 3528
0805 specific size: 2.0 X 1.25 X 0.5
1206 specific size: 3.0 X 1.5 0X 0.5
Common PCB component package size
If you are using high power transistors, FS Technology recommends you to use TO-3, the shape of this transistor is straight, we often use it when doing PCB assembly. Medium power transistors are generally flat, you can use TO-220. Low-power transistors include TO-5, TO-46, TO-92A. If you have special needs and need to use metal casing PCB components, when choosing transistors, you can try TO-66.
Component packaging
Resistors: RES1, RES2, RES3, RES4; package properties are axial series
Nonpolar Capacitors: Capacitance; package properties are RAD-0.1 to rad-0.4
Common component package size
Electrolytic capacitors: electroi; package properties are rb.2/.4 to rb.5/1.0
Potentiometer: pot1pot2; package properties are vr-1 to vr-5
Diode: Package property is diode-0.4 (low power) diode-0.7 (high power)
LED: RB.1/.2 [H]
Triode: Commonly used package attributes are to-18 (ordinary triode) to-22 (high-power triode) to-3 (high-power Darlington tube)
There are 78 and 79 series regulator blocks; [h]
78 series such as 7805, 7812, 7820, etc.
79 series has 7905, 7912, 7920, etc.
Common package attributes are to126h and to126v[h]
Rectifier bridge: BRIDGE1BRIDGE2: Package attribute is D series (D-44, D-37, D-46)
Field effect transistor and triode are the same
Crystal XTAL1[h]
Resistance: AXIAL0.3-AXIAL0.7 where 0.4-0.7 refers to the length of the resistance. Generally use AXIAL0.4
Ceramic capacitors: RAD0.1-RAD0.3. Among them, 0.1-0.3 refers to the size of the capacitor, generally RAD0.1
Electrolytic capacitor: RB.1/.2-RB.4/.8 where .1/.2-.4/.8 refers to the size of the capacitor. Generally 470uF use RB.3/.6
Diode: DIODE0.4-DIODE0.7 where 0.4-0.7 refers to the length of the diode, generally DIODE0.4 is used
LED: RB .1/ .2
Button SW-PB Package Properties KEYSB3
Integrated block: DIP8-DIP40 Among them, 8-40 refers to how many pins there are, and pin 8 is DIP8
[h] Chip resistor 0603 indicates that package size is related to resistivity, but package size is related to power