W21-470RJI Resistors

Through Hole Resistors are found in many electrical circuits, and the W21-470RJI is a type of resistor that has some unique features. By understanding the application field and working principle of this resistor, it is possible to identify the best uses for this type of component.

Application Field of W21-470RJI

The W21-470RJI is a radial, through-hole resistor, typically used for high-voltage applications. It can withstand very high voltages, so it is often used to protect circuits from power surges and spikes. This type of resistor has a high operating temperature range (125 to +125 degrees C) and is capable of withstanding extreme thermal shock. It is also resistant to humidity, so it is suitable for use in damp conditions. Due to its ability to withstand high voltages, W21-470RJI resistors are often used in demanding applications, such as in process controls, motor controllers, and motor drives.

Working Principle of W21-470RJI

The W21-470RJI resistor works on the principle of resistive heating. This type of resistor is composed of a ceramic substrate, on which a resistive element is printed. The resistive element is made of a thin film of carbon and is applied to the ceramic substrate using a laser-assisted process. When an electrical current is passed through the resistor, the resistive element begins to heat up due to the resistance. As the heat increases, the resistive element expands and contracts, creating an alternating current (AC) that is regulated by the resistor.

The W21-470RJI resistor also has a built-in thermal protection feature. If the temperature of the resistor exceeds a certain limit, the thermal protection feature will activate and reduce the current flow through the resistor, effectively preventing the resistor from overheating and sustaining damage.

Advantages of Using W21-470RJI

The W21-470RJI resistor offers several advantages over other types of resistors. Firstly, it has a very high operating temperature range and it can withstand extreme thermal shock, making it suitable for use in demanding applications. Secondly, it has a built-in thermal protection feature which prevents the resistor from sustaining damage due to excessive current. Finally, it is resistant to humidity, making it suitable for use in damp conditions.

The W21-470RJI resistor is an effective and reliable component for high-voltage applications, offering excellent performance in extreme conditions. By understanding the application field and working principle of this resistor, it is possible to identify the best uses for this type of component.