 | DescriptionWirewound resistors are fixed resistors made by winding resistive wires an insulating core. The conductive wire is usually made from nickel-chromium, manganese copper and other alloys, the insulating core is usually made from alumina ceramics, and the encapsulation materials are mainly insulating varnish, silicone resin, paint, ceramic and aluminium shell. Most precision wirewound resistors are encapsulated in silicone resin, as high temperature sintering process is not needed, so there is no effect on the electrical parameter. Wirewound resistors usually have one layer of conductive wire wound around the core, but a single layer wire will create inductance in AC condition, so bi-directional winding is often used in AC condition to achieve non-inductance. |
Tel: (65) 6769-1118
