The distinction of carbolic film resistor and metallic film resistor
[introduction] the sort of resistor is very much, and the classification of resistor is put in a lot of difference. Resistor of film of the carbon in resistor of film of main with a view to mixes the article the identifying of metallic film resistor.
The sort of resistor is very much, and the classification of resistor is put in a lot of difference. Resistor of film of the carbon in resistor of film of main with a view to mixes the article the identifying of metallic film resistor.
Carbolic film resistor and metallic film resistor often are used in circuit. Carbolic film resistor because its are low cost is used with simple manufacturing process by more frequent ground. The manufacturing process of filmy resistor is as follows commonly: → of gland of the → that become film classifications → opens → of first try of → of spray paint of → of groovy → spot welding → of choice of answer check → packs lubricious annulus → . So how Where is resistor of divisional carbon film and metallic film resistor?
Resistor of 1. carbon film
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In the production process of carbolic film resistor, carbolic deposit is on magnetism club or contented porcelain tube, and be in apparently form crystal of film of a carbon. Through using cut quarter chamfer adjusts the ply of carbolic film, we can change carbolic film resistor the resistance that needs for place. epoxy resin besmear is in apparently in order to enhance sealing.
The resistance of resistor of film of lubricious annulus carbon is 1Ω-10MΩ , rated power is 0.125W, 0.25W, 0.5W, 1W, precision limits is ±10 ％ , ±5 ％ , ±2 ％ . Resistor of film of this kind of carbon volume is normally larger, often use in a few cheap electron products, for example mobile phone charger, computer power source.
Resistor of 2. metal film
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In the manufacturing process of metallic film resistor, be in charge of in pottery and porcelain through vacuum evaporates or be being permeated metallic film is formed on frame. Adhere to this film the surface of white pottery and porcelain, and can obtain more accurate resistor through cut. Metallic film resistor has precision tall, volume is minor, stability is good with the characteristic with high cost. Normally, we use metallic film resistor in wireless electron equipment. In addition, the metallic film resistor that also has high accuracy uses as the domain such as for military use.
Of resistor of 3. metal film and carbolic film resistor different
(1) according to resistor temperature coefficient
Carbolic film resistor has character of negative temperature coefficient, and metallic film resistor is had normally lesser temperature coefficient.
(2) according to resistor precision
The precision of resistor because of its different workmanship different. We know carbolic film resistor is very common resistor, its precision is not very tall normally. But, the manufacturing demand of metallic film resistor is higher, because this resistor precision compares carbolic film resistor,get high much.
(3) according to resistor color
Common carbolic film resistor because precision is low with production cost is low and be yellow mostly or pink, and resistor of most metal film is blue.
(4) according to resistor lacquer
The surface of carbolic film resistor has the protective lacquer of a black, and metallic film resistor besmears normally the diaphragm that has bright white.
The place on put together is narrated, we are OK according to temperature coefficient, resistor precision, resistor color and coating will decide carbolic film resistor and metallic film resistor. But, the progress as resistor technology and more manufacturing technology of intelligence, a few methods need to adjust and be improved.
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