Which types can be divided into materials according to the material
Resistors are components that limit currents, is an fundamentally used electronic component, usually many people don’t know which classes are divided into resistors. Let’s take a look together
1, carbon film resistor
The carbon film resistor is made of crystalline carbon that is thermally decomposed by vacuum thermal temperature in a cylindrical or tubular ceramic skeleton. The resistance value is controlled by controlling the thickness and the split groove of the carbon film.
The carbon film resistor has a good stability, small negative temperature coefficient, high frequency characteristics, small voltage and frequency, smaller noise, stable pulse load, wide range of resistance, simple production process, low production cost, So very widely used in a variety of electronic products.
2, metal film resistor
The metal film resistor is made of vacuum-heating to form a layer of film on the porcelain substrate in vacuo, and is also made of high temperature decomposition, chemical deposition, and sinter.
The stability and heat resistance of the metal film resistor is good, the temperature coefficient is small, the operating frequency range is large, the noise electromotive force is small, often used in the high frequency circuit.
3, metal oxide film resistor
The metal oxide film resistor is made of a blazing ceramic skeleton surface in a heating furnace of tin and antimony (tetrachloride and trioxide) to a heating furnace of about 550 ° C, is deposited. The conductive film layer of such a resistor is uniform, and the film is securely bonded to the skeleton matrix, and some properties are superior to the metal film resistor. The shape of the ordinary metal oxide film resistor is substantially the same as the metal film resistor, and the structure is mostly cylindrical and the axial lead line.
Metal oxide film resistors are resistant to metal film resistors, anti-acid, resistance, and salt resistance, and heat resistance. The disadvantage of the metal oxide film resistor is due to the characteristics of the material and the limitation of the film layer thickness, the range of resistance is small, its resistance range is 1 Ω ~ 200
KΩ; rated power is 1/8 ~ 10 W; 25 W ~ 50 kW.
4, synthetic carbon film resistor
The synthetic carbon film resistor is a suspension of carbon black, filler, and an organic binder to a suspension. Its resistance is high, which can reach 10 ~ 106 mΩ; rated power is 1/4 ~ 5
W; maximum operating voltage is
35kV. Its disadvantage is that poor anti-wetness, low voltage stability, low frequency characteristics, large noise. Such a resistor is not suitable for a universal resistor. Such resistors are mainly suitable for high pressure and high resistors, and are commonly used in glass shell packages to make vacancies, which are used for micro current testing.
5, organic synthetic solid resistor
The organic synthetic solid resistor is made of carbon black, graphite, etc., and the filler is mixed with an organic binder into a powder, and is filled into the plastic shell after thermal pressing the special equipment. The leads of the solid resistor are plastically plastic in the resistor, one is a resistor with an endless cap, and the other is a resistor having an end cap and a resistor of the electrode.
This resistor has high mechanical strength, good reliability, strong overload ability; small size, low price; high inherent noise, large distribution parameters, poor voltage and temperature stability, voltage range 4.7Ω ~ 22
MΩ; operating voltage is 250 ~ 500 V; rated power is 1/4 ~ 2
W. Such a resistor is not suitable for use in a higher electrical circuit. Currently common organic synthetic solid resistors have RS11 and RS types. RS type organic heart resistors are commonly used in automotive meters (oil pressure gauges).
6, glass glaze resistor
The glass glaze resistor is mixed by metal oxides such as metal silver, rhodium, ruthenium and glass glaze adhesive, and is coated on the ceramic skeleton body, which is sintered by high temperature. Currently, a resistor is prepared by cerium oxide and glass glaze adhesive. Metal glass glaze resistors have ordinary and precision.
This resistor is high temperature, good moisture resistance, good stability, small noise, small temperature coefficient, large resistance range, 4.7Ω ~ 200 mΩ; rated power is 1/8 W, L / 4 W, L / 2
W, 1 W, 2 W, high power is 500 W; the highest voltage is 15 kV.
7, wire wind resistor
The wire-wound resistor is a resistor made from azodic resistance material Kangron, a manganese copper or nickel-chromium alloy wire on a ceramic skeleton.
Some of this resistor is covered with glass glaze, often referred to as a glass glaze wire resistant; some surface is covered with a paint or varnish, called painted wire wind resistor; still is not protected The bare wire is wound, referred to as a nude wire resistor. The wire-wound resistor of the surface coated protective layer is conducive to maintaining the stability of the resistance when the resistance is protected.
The noise of the resistor is small, even no current noise; the temperature coefficient is small, the thermal stability is good, high temperature resistance, the operating temperature can reach 315 ° C; the power is large, can withstand high power load; the value range is 0.1 Ω ~ 5
MΩ; rated power 1/8 ~ 500 W. The disadvantage is that the high frequency can be poor.