SMD component footprint description

SMD component footprint description.jpg

Light-emitting diodes: The colors are red, yellow, green and blue. The brightness is divided into three levels: bright, high bright and super bright. There are three types of commonly used packaging: 0805, 1206, 1210.

Diode: According to the limit of the current tolerated, the package form is roughly divided into two types. The small current type (such as 1N4148) package is 1206. The large current type (such as IN4007) has no specific package form, and can only give the specific size: 5.5. X 3 X 0.5

Capacitor: It can be divided into two types: non-polarity and polarity. The following two types of packages are the most common, namely 0805 and 0603. The polar capacitor is also the electrolytic capacitor we usually call. Generally, we usually use it. The most aluminum electrolytic capacitors, because their electrolytes are aluminum, their temperature stability and accuracy are not very high, and the chip components require high temperature stability because they are close to the circuit board, so the chip capacitors are There are many capacitors. According to their different withstand voltage, the chip capacitors can be divided into four series: A, B, C, and D. The specific classification is as follows:

Type Package type Withstand voltage

A 3216 10V

B 3528 16V

C 6032 25V

D 7343 35V

DIP switches, crystal oscillators, etc., can be found in the market for different sizes of chip packages, the performance price will be based on their lead plating, nominal frequency and segment position.

Resistance: Similar to non-polarity capacitors, the most common ones are 0805 and 0603. The difference is that she can appear as an exclusion, four or eight. The specific package style can refer to MD16 simulation version. Go to the design house's internal PCB library query.

Note:

A\B\C\D four types of package form is its specific size, labeled as L X S X H

1210 specific size is the same as 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