What is a high voltage resistor

Resistors are referred to as resistors (usually represented by "R") and are the most used components in all electronic circuits. The main physical characteristic of a resistor is to transform electrical energy into thermal energy. It can also be said that it is an energy-consuming element, and internal energy is generated when current passes through it. Resistor usually plays a role of dividing voltage and current in a circuit. For signals, both AC and DC signals can pass through the resistor.

A high voltage resistor refers to a resistor that works under a high voltage of 1,000 to 35,000 volts, with a resistance of up to 1011 ohms. To be able to withstand a very high voltage, a high-voltage resistor must have a high resistance value and a large power dissipation. In order to prevent electrical breakdown, a slender substrate with high compressive strength must be selected, the resistive film is made of a spiral ribbon, and the voltage gradient along the length must not exceed 500 volts/cm.

This resistor is made of synthetic carbon film, metal film, and metallic glass glaze film. It is used as a voltage divider and absorber in high-voltage devices, and can also be used for discharging and arc extinguishing of rectifier filter capacitors.