Resistor Package and Size – At the beginning of the discovery of resistors, the type of resistor that has two legs is a resistor that is used in all electronic devices.
However, due to the development of technology, resistors also evolved.
The size of the resistor that is made is getting smaller, so it is designed in such a way that the holder can be attached to the PCB with a small size too.
Based on the size of the wrapper or body on the resistor, it is currently divided into 3 “Package”.
There are 3 types of packages that have resistors, namely SMD (Surface Mount Technology), Axial, and MELF (Metal Electrode Leadless Face).
SMD resistors are a type of onboard resistor on the PCB, with a rectangular and thin shape. Axial resistors are resistors that have legs or leads.
While the MELF resistor is a resistor in the form of an Axial resistor but without legs and includes a resistor attached to the PCB such as an SMD resistor.
For details, you can see in the following picture.
Table Code Resistor SMD
SMD and MELF resistors are often used in small dual layer devices, because of their small size and direct solder position on the PCB without holes, these resistors are used in almost all digital electronic devices such as computers, smartphones, LCD TVs and others.
The size of the SMD resistor is marked with a numeric code such as 0805. This numeric number contains the length and width of a resistor.
For example, a resistor with a package size of 0805 means that this resistor is 0.08 ″ long and 0.05 ″ wide. Look at the following picture.
For the sizes of the Axial and MELF resistors, at this time I can’t write them here, because I haven’t found a standard size for these resistors.
But from my experience, the size between the legs of this Axial resistor ranges from 0.8 – 1.2 cm with a power of <1 watt.
For more details, please see the datasheet of the resistors used.
I hope this article is useful.
