Wirewound resistors are a type of fixed resistor. Wirewound resistors are made of resistance wire wound on an insulating frame. Resistance wire is generally made of nickel-chromium, manganese-copper and other alloys with a certain resistivity.

The insulating frame is made of ceramics, plastics, metals coated with insulating layers and other materials into various shapes such as tubular and flat. The resistance wire can be wound on the frame in one layer or multiple layers according to needs, or non-inductive winding can be used.

Wirewound resistors are mainly used for voltage division, voltage reduction, current shunting and load in AC and DC circuits such as precision instruments, telecommunication instruments, and electronic equipment.