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Metal Film Resistor
Metal film resistors are among the most widely used resistors to date.
They feature high precision, stable performance, and a simple, lightweight structure, playing an important role in the electronics industry as well as high-precision fields such as military and aerospace applications.
They feature high precision, stable performance, and a simple, lightweight structure, playing an important role in the electronics industry as well as high-precision fields such as military and aerospace applications.
Metal Film Resistor, marked with the symbol RJ, is a type of film resistor. It is manufactured by depositing a layer of nickel-chromium or similar alloy onto a ceramic rod using high-temperature vacuum coating technology to form a resistive film. The resistance is then precisely adjusted by cutting and trimming, followed by adding appropriate terminations and sealing the surface with epoxy resin for protection. As a leaded resistor, it is convenient for manual assembly and repair, and is widely used in most home appliances, communications equipment, and instruments.
Metal film resistors use special metals or alloys as resistive materials, with the resistive film formed on ceramic or glass substrates via vacuum evaporation or sputtering. By controlling the film thickness and cutting grooves, the resistance value can be accurately adjusted. Their electrical performance — including heat resistance, noise voltage, temperature coefficient, and voltage coefficient — is superior to carbon film resistors. The manufacturing process is flexible, allowing adjustment of material composition, film thickness, and resistance through grooving, resulting in excellent performance and a wide resistance range.
Compared with carbon film resistors, they are smaller, lower in noise, and more stable, but at a higher cost. They are widely used as precision and high-stability resistors in various electronic and radio equipment.
Performance Parameters
- Temperature coefficient: ±100 ppm/℃
- High power load capacity, low current noise
- High stability and good high-frequency performance
- Operating temperature range: -55℃ ~ +155℃
- Tolerance: 0.25%, 0.5%, 1%, 5%
- Resistance range: 1Ω ~ 10MΩ
- Standard resistance series: E-96
- Packaging: tape and reel, bulk
Features
- High thermal conductivity ceramic core
- High-stability metal film
- High-reliability end caps with good compression bonding
- High-insulation, solvent-resistant epoxy coating
- Standard color codes compliant with MIL & EIA specifications
- Excellent solderability leads (copper or tinned copper-clad steel leads available per request)
Available Models & Packaging
Power ratings: 1/8W, 1/4W, 1/4WS, 1/2W, 1/2WS, 1W, 1WS, 2W, 2WS, 3WS, 3W, 5W Packaging: tape and reel, bulk, formed leads
All performance items — including resistance grooving magnification, durability, voltage endurance, temperature cycling, insulation resistance, moisture resistance, solderability, intermittent overload, and temperature characteristics — are produced in accordance with standard manufacturing processes.