High voltage chip resistors and ordinary chip resistors are two common types of resistors in electronic components. They have some differences in appearance, structure, performance, and other aspects. This article will analyze from these aspects.
1、 Appearance differences
Size: The size of high-voltage chip resistors is relatively large, mainly to meet the electrical characteristics requirements in high-voltage environments, while the size of ordinary chip resistors is smaller.
Shell: High voltage patch resistors are usually made of flame-retardant materials in a high-temperature resistant shell to ensure safety performance in high voltage environments. Ordinary chip resistors, on the other hand, use shells made of ordinary materials.
2、 Structural differences
Resistance material: High voltage chip resistors are usually made of metal oxide thin film materials, which have high voltage resistance. Ordinary SMD resistors use ordinary resistance materials, such as carbon film resistance materials.
Electrode structure: The electrode structure of high-voltage patch resistors is relatively simple, usually using planar electrodes to improve their withstand voltage capability. The electrode structure of ordinary SMD resistors is more complex, usually using a double-sided electrode structure to improve the stability and accuracy of the resistor.
3、 Performance differences
Voltage withstand capability: High voltage chip resistors have high voltage withstand capability and can withstand high working voltages, typically reaching several thousand volts or even higher. However, the withstand voltage of ordinary SMD resistors is relatively low, usually only able to withstand a working voltage of several hundred volts.
Resistance range: The resistance range of high-voltage chip resistors is relatively small, usually between a few hundred ohms to a few megaohms. The resistance range of ordinary chip resistors is relatively wide, covering a range of from a few ohms to several hundred megaohms.
Accuracy: Due to differences in electrode structure, the accuracy of high-voltage chip resistors is relatively low, usually between 5% and 10%. The accuracy of ordinary SMD resistors is relatively high, usually reaching 1% or lower.
Temperature coefficient: The temperature coefficient of high-voltage chip resistors is relatively low, usually below a few hundred ppm/℃. The temperature coefficient of ordinary SMD resistors is relatively high, usually above several thousand ppm/℃.
In summary, there are certain differences in appearance, structure, and performance between high-voltage chip resistors and ordinary chip resistors. High voltage patch resistors are usually used in applications that require high voltage withstand capacity and stability, such as high voltage power supplies, power equipment, and other fields. Ordinary chip resistors are widely used in general electronic devices, such as communication devices, computers, etc. Choosing the appropriate resistor based on actual needs plays a crucial role in the stability and performance of the circuit.
