What is the difference between precision resistors and ordinary resistors?

The main differences between precision resistors and ordinary resistors are higher accuracy (the error is usually between 0.1% and 0.01%) and stronger temperature stability. Precision resistors are typically made from metal alloys and packaged in metal casings or ceramic substrates to provide better temperature stability and mechanical protection, and therefore cost more. They are widely used in precision instruments, test equipment and measurement circuits that require high accuracy and stability.

The difference between precision resistors and ordinary resistors

The application of precision resistors and ordinary resistors in electronic design play a vital role in various applications, but there are some key differences between them.

Accuracy

This is the most important difference. Precision resistors have extremely high accuracy, typically with an error between 0.1% and 0.01%, while conventional resistors typically have an error between 5% and 10%. This high accuracy makes precision resistors indispensable in applications requiring precise current or voltage control.

Temperature stability

Another feature of precision resistors is their high temperature stability. Their resistance remains stable over a wide temperature range, whereas the resistance of ordinary resistors can fluctuate significantly with temperature changes. This makes precision resistors ideal for circuits that require stability under changing temperature conditions.

Material

Precision resistors are usually made of metal alloys such as nickel-chromium or manganese-copper, while ordinary resistors are made of carbon, metal oxides or metal films Made of various materials. These alloy materials have high stability and low temperature coefficients, providing greater accuracy.

Construction

Precision resistors are usually packaged in metal casings or ceramic substrates, while ordinary resistors are packaged in cardboard, plastic or ceramic casings. Metal housing and ceramic substrate provide better temperature stability and mechanical protection.

Cost

Due to their superior performance, precision resistors usually cost more than regular resistors. However, their high cost is often justified in applications requiring a high degree of accuracy and stability.

Application

Precision resistors are widely used in precision instruments, test equipment, measurement circuits and analog circuits. Ordinary resistors are more commonly used as current limiters or voltage dividers in general electronic equipment.

The above is the detailed content of What is the difference between precision resistors and ordinary resistors?. For more information, please follow other related articles on the PHP Chinese website!