Introduced by enamel resistor manufacturers, the advantages of enamel resistors
2026-01-22
Introduced by enamel resistor manufacturers, enamel resistors (enameled wire wound resistors)
The enamel resistor manufacturer claims that enamel resistors (glazed wire wound resistors) are a type of wire wound resistor (model RX20). Heat resistant glaze insulation protection.
Advantages of enamel resistors (enameled wire wound resistors):
Enamel resistors (enameled wire winding) have the characteristics of high stability, high precision, low noise, and high power. It can generally withstand a rated output power of 1-500w and can operate normally at a high temperature of 150 ℃. The temperature coefficient can be less than 10/℃, and the accuracy is higher than ± 0.01%.
The disadvantage of winding resistance analyzed by glaze resistance manufacturers is that its inductance and distributed capacitance are relatively large, the resistance value is not high, and it is not suitable for high-frequency circuits above 2mhz. Only applicable to voltage divider resistors or filter resistors in circuits that require the use of high-power resistors, or in high-temperature processing environments.
utilize
Enamel resistors are said by enamel resistor manufacturers to have characteristics such as high temperature resistance and good moisture resistance, and can be widely used in DC or low-frequency AC circuits of various electrical and electronic equipment, for voltage reduction, division, branching, or load resistance. In rectifier power supplies, it is used as a filtering resistor, voltage reducing resistor, voltage divider, and shunt in instruments.
There are several commonly used enamel resistors (glazed wire wound resistors):
2 Ω/25W, 3 Ω/25W, 100 Ω/25W, 180 Ω/25W, 250 Ω/25W; 3 Ω/75W, 75 Ω/75W; 39 Ω/100W, 100 Ω/100W
Enamel wire resistance model: rx20-t-50-t-1k5- ± 10% printed surface, its meaning rxyc-t represents: moisture-proof enamel wire winding adjustable resistance, 50 represents: rated power 50w, 1k5 represents: resistance value 1.5 k Ω, ± 10%: allowable error is ± 10%.
The testing method uses a fixed resistance value, but the resistance value measured on the parameter table should be consistent with the labeled value. The allowable error range is R (1 ± 5%) (R represents the labeled value on the measured resistance)
We can use the luminescence effect of resistance heating to achieve lighting for incandescent lamps and other lighting fixtures. Of course, incandescent bulbs are rarely used now.
As for fluorescent lamps and fluorescent lamps, the glow discharge principle is used. This belongs to the category of gas breakdown characteristics and is not directly related to resistance. However, the shadow of resistance can also be seen in their volt ampere characteristic curves.
We can also change the method of applying voltage to the surface of glass through a transparent conductive film, and achieve color change of Chinese glass by continuously changing the resistance of the conductive film and the temperature environment.
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