metal film resistor symbol RJ is used as a symbol
Metal Film Resistors is one of film resistors. It is made by using high temperature vacuum coating technology to closely attach nickel chromium or similar alloy to the surface of the porcelain rod to form a skin film, after cutting debugging resistance value, in order to achieve the final required precision resistance value, and then add appropriate joint cutting, and coated on the surface of the epoxy resin seal protection. Because it is a lead type resistance, convenient manual installation and maintenance, used in most household appliances, communications, instruments.
Metal film resistor is to use special metal or alloy as resistance material, with vacuum evaporation or sputtering method, in ceramic or glass basically form resistance film layer resistor. Such resistors are usually made by vacuum evaporation, in which the alloy is heated in a vacuum and evaporates, forming a conductive metal film on the surface of the porcelain rod. Grooving and changing the thickness of the metal film can control the resistance value. Its thermal resistance, noise potential, temperature coefficient, voltage coefficient and other electrical properties are better than carbon film resistor. The manufacturing process of metal film resistor is flexible. It can not only adjust its material composition and film thickness, but also adjust the resistance value by grooving, so it can be made into good performance and wide range of resistance.
Compared with carbon film resistor, this resistor has small volume, low noise, good stability, but high cost. It is often used as a precision and high stability resistor and widely used in a variety of radio electronic equipment.
Performance parameter
Temperature coefficient: ±100PPM/℃
Large power load and small current noise
Stable performance, high frequency performance
Operating temperature range: -55℃ ~ +155℃
Accuracy: 0.25[%], 0.5[%], 1[%], 5[%]
Resistance range: 1Ω to 10 m Ω
Nominal resistance: E-96
Packing methods include belt packing and bulk packing
characteristic
1) Porcelain core with high heat conduction
2) High stability metal skin film
3) High reliability end caps with good compression
4) Epoxy resin coating with high insulation and solvent resistance
5) Standard color tape in accordance with MIL&EIA regulations
6) Good soldering wire (copper wire pins and tinned copper-covered steel wire pins can be made according to customer requirements)
Provide model and packing: 1/8 w, a quarter w, 1/4 ws, 1/2 w, 1/2 ws, 1 w, 1 ws, 2 w, 2 ws, 3 ws, 3 w, 5 w. Braided packing, bulk, molding.
Resistance notching amplification, durability, resistance to voltage, temperature cycle, insulation impedance, resistance to wet load, solder, intermittent overload, temperature characteristics. All are produced according to standard process.