What are the performance characteristics of glass glaze resistor and wirewound resistor?
1.Glass glaze resistor.
Glass glaze resistors are made of metal silver, rhodium, ruthenium and other metal oxides and glass glaze adhesives, which are mixed with glass glaze adhesives, and are coated on the ceramic skeleton and sintered at high temperature.
( 1 ) Performance characteristics : glass glaze resistors have high temperature resistance, good moisture resistance, good stability, low noise, small temperature coefficient, and large resistance range. The resistor is a thick film resistor.
( 2 ) Resistance range:4.7ohm~ 10Megohm.
( 3 ) Rated power: 0.05W——2W.
Note : small glass glaze resistors can be used in electronic watches with an environment of -55 ~ 125 Centigrade and rated temperature up to 85 Centigrade.
2. The wirewound resistor:
The wirewound resistor is made of constantan, manganin or nickel-chromium alloy wire wound on the ceramic skeleton. The surface of the resistor is covered with a glass glaze, which is often referred to as an enamel wire wound resistor; some of the surface is coated with a layer of protective organic paint or varnish, which is called varnished wire wound resistor; there is also a bare wire wound resistor.
( 1 ) Performance characteristics : the wire-wound resistor has little noise, even no current noise; the temperature coefficient is small, the thermal stability is good, and the temperature is high, and the working temperature can reach 315 Centigrade. High power, able to withstand high power load. The disadvantage is that the high-frequency characteristics are poor.
( 2 ) Resistance range:0.1 ~ 5Megohm.
( 3 ) rated power:1 / 8 ~ 500W.
Note : the wirewound resistor is divided into fixed and adjustable two types.