The Packaging Method and Importance of Resistors

In the world of electronic components, resistors are a fundamental and indispensable component. Its main function in the circuit is to limit the current, thereby protecting other sensitive components from damage caused by excessive current. However, resistors themselves have many different characteristics, such as resistance value, power, and temperature level, which require packaging to achieve. This article will provide a detailed introduction to the packaging methods of resistors and their importance

1、 Packaging type of resistors

1 Small package

Small scale packaging is a common type of resistor packaging, commonly used for surface mount (SMT) circuit boards. The advantages of this packaging are small size, light weight, convenient surface installation, and suitability for high-frequency and high reliability application scenarios. Common small packages include 0402, 0603, 0805, etc

2 Medium size packaging

Medium size packaging is commonly used for traditional installation on printed circuit boards (PCBs). The advantage of this packaging is that it can accommodate a larger number of pins, making it easier to solder and maintain. Common medium-sized packages include 1210, 1213, 1608, etc

3 Large scale packaging

Large scale packaging is mainly used for fixed installation, such as components such as heat sinks, inductors, and capacitors. The advantage of this packaging is that it can accommodate more pins and components, providing greater electrical performance and stability. Common large packages include 2220, 2620, 2825, etc

2、 Packaging method of resistors

The packaging methods of resistors mainly include the following:

1 Linear welding

Linear welding refers to the direct welding of one end of the resistor to the substrate, while the other end is connected to other components through a through-hole. This packaging method can achieve simple circuit connections, but it is easily affected by the stress generated during the welding process, resulting in changes in resistance values

2 Surface mount (SMT) welding

Surface mount welding refers to directly attaching resistors to the surface of a PCB, and then welding them through wave soldering or reflow soldering processes. This packaging method has high reliability and repeatability, suitable for high-frequency and high-density application scenarios

3 Perforated pin (PTH) welding

Perforated pin welding refers to pre punching holes on a PCB, then inserting resistors into the holes and connecting them to other components through gold wires. This packaging method has high mechanical strength and vibration resistance, making it suitable for harsh environmental conditions and high-temperature application scenarios

3、 The importance of resistor packaging

1 Improve performance and reliability

A reasonable packaging method can ensure the stable performance and reliability of resistors under various environmental conditions, thereby improving the stability and lifespan of the entire circuit system

2 Easy to install and maintain

Different packaging methods are suitable for different application scenarios, which can simplify circuit design and production processes, and improve installation and maintenance efficiency. For example, surface mount welding is suitable for high-frequency and high-density application scenarios, while perforated pin welding is suitable for harsh environmental conditions and high-temperature application scenarios