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oxide film resistor
Sep 16, 2017

Features: Because of its own is the oxide, so high temperature stability, heat shock, load capacity. But it is prone to electrolysis under the DC to reduce the oxide, the performance is not stable.


RY Power: 0.25W Resistance range: 1-1K Tolerance: J, K


Oxide film resistance


Maximum operating voltage: 250V Temperature coefficient: + - 700PPM (negative temperature: + - 1200PPM) Maximum weight: 0.25G


RY Power: 2W Resistance range: 1-10K Tolerance: J, K Maximum weight: 3.5G Maximum operating voltage: 750V Temperature coefficient + -700PPM (negative temperature: + - 1200PPM)


RY70 Power: 1W Resistance range: 10-1K Tolerance: D, F, G Maximum weight: 3.5G Temperature coefficient +200PPM (negative temperature: +300PPM)


Metal oxide film resistor resistance range of 1Ω ~ 200kΩ This resistor is the hydrolysis of metal salt solution (such as tin tetrachloride and antimony trichloride) in the hot glass or ceramic surface decomposition of the deposit The As the manufacturing conditions are different, the performance of the resistors is also very different. The main features of this resistor is high temperature, the operating temperature range of +40 ~ 235 ℃ in a short time can be overloaded; resistance temperature coefficient of ± 3 × 10-4 / ℃; good chemical stability. The resistivity of this resistor is low, the resistance of the low-power resistor is not more than 100 kΩ, so the scope of application is limited, but can be used as a supplementary metal film resistor low resistance part


Fold the characteristics of this paragraph


1, heat, moisture, overload stability is good


2, the film is not easy to damage hard, non-flammable structure coating


3, the use of high-quality porcelain production of small pieces to replace large-size high-power general resistance


The disadvantage of oxide film resistance


Oxide film resistance in the DC prone to electrolysis to reduce the oxide, the performance is not stable. Low withstand voltage.

A thin film resistor is formed on the surface of an insulating substrate (such as a molded phenolic plastic) by means of a vacuum coating or a cathodic sputtering process, and a specific metal or alloy such as nickel-chromium alloy, tin oxide or tantalum nitride is called Oxide film resistance.