As a leading global manufacturer of electronic components, Vishay's resistor products cover the full range of needs from consumer electronics to military aerospace with high precision, high reliability, and diversified technology routes. According to material technology, functional characteristics, and application scenarios, Weishi resistors can be mainly divided into the following categories:
1、 Classified by materials and processes
Thin Film Resistors
Features: Nickel chromium alloy is deposited onto ceramic substrates using vacuum deposition technology, with a film thickness of only 0.1 μ m. The resistance value is precisely controlled through photolithography process. It has ultra-high precision (tolerance ± 0.01%), low noise (<25dB), and low temperature drift (TCR ± 25ppm/° C), with excellent high-frequency characteristics (up to 70 GHz).
Typical series:
CHA series: suitable for high-frequency scenarios such as 5G base stations and satellite communication.
PEP series: tolerance ± 0.05%, used for precision instruments and avionics systems.
Packaging: 02016 (0.2mm × 0.1mm), 0505, 1206 and other small sizes.
Thick Film Resistors
Features: The ruthenium dioxide slurry is coated on ceramic substrates through screen printing, which has low cost and strong mechanical stress resistance, but the accuracy and temperature drift are slightly inferior to thin film resistors (tolerance ± 1%, TCR ± 200ppm/° C).
Applications: Consumer electronics power modules, industrial control systems.
Metal foil resistor (Bulk Metal) ® Foil Resistors）
Features: Adopting nickel chromium alloy foil photolithography molding, achieving ± 0.001% ultra-high precision and ± 0.2ppm/° C ultra-low temperature drift, with long-term stability of ± 0.005%.
Typical series: VHP100 (metrology calibration), VSMP series (750mW power, used for medical equipment and testing terminals).
Wirewound Resistors
Features: The alloy wire is wound around a ceramic skeleton, with strong power carrying capacity (up to several hundred watts), excellent pulse resistance (such as withstanding 5kW pulses within 1 μ s), and high temperature resistance (250 ℃).
Typical series: AC series (cement encapsulated, used for automotive pre charging and industrial surge suppression).
2、 Classified by functional characteristics
Current Shun Resistors
Design: The wide electrode structure reduces parasitic inductance, with a resistance as low as 0.1m Ω and an accuracy of ± 0.1%.
Type:
Thick film type (low-cost, industrial grade).
Metal foil type (automotive grade, TCR ± 10ppm/° C).
Application: Electric vehicle BMS system, power management.
High Power Resistors
Features: Optimized heat dissipation design (such as TO247 package), power up to 200W, pulse energy absorption of 140J/0.1s.
Representative series:
ISOA200 (Integrated NTC Thermistor, Simplified Thermal Management).
LTO 150H (for electric vehicle charger).
Precision and low-temperature drift resistor
Low temperature drift alloy resistor (TCR<± 10ppm/° C), used for precision instruments with large environmental temperature fluctuations.
Aerospace grade resistors (such as M55342 series) comply with MILPRF55342 standard and have passed vacuum degassing certification.
High voltage resistor
Series: SMA 0204/0207/0414, withstand voltage of 200-500V, resistance of 0.22M Ω -22M Ω, used for high-voltage power supply and measuring instruments.
3、 Classified by application field
Automotive electronic grade
Compliant with AECQ200 standards, resistant to high temperatures and vibrations, such as automotive grade current detection resistors and pre charging resistors (LTO 150H).
Industrial and Energy Grade
High power thick film resistors (such as aluminum shell packaging) are used for photovoltaic inverters and motor drives.
Aerospace and military grade
Anti radiation reinforced thin film resistors (such as M55342 series) operate at temperatures ranging from 55 ℃ to+125 ℃ and meet ASTM E595 degassing standards.
Consumer electronics grade
Low cost thick film surface mount resistors (such as 0603 and 0805 packages) are used for surge suppression in power adapters.
Comparison Table of Key Types of Weishi Resistors
|Type | Accuracy | Temperature Coefficient (TCR) | Power Range | Typical Application Scenarios|
|Metal foil resistance | ± 0.001% | ± 0.2 ppm/° C | 200mW-750mW | Metrology calibration, medical equipment|
|Thin film resistor | ± 0.01% | ± 25 ppm/° C | 125mW – 500mW | 5G communication, satellite navigation|
|Thick film resistor | ± 1% | ± 200 ppm/° C | 0.25W-5W | Consumer electronics power module|
|Wire wound resistance | ± 0.005% | ± 20 ppm/° C | 1W - several hundred watts | Industrial surge suppression, automotive pre charging|
|Current detection resistor | ± 0.1% | ± 10 ppm/° C | 0.25W-5W | Electric vehicle BMS, power management|
4、 Innovation and Market Positioning
Customization capability: Provide customized services for resistance, packaging, and heat dissipation solutions (such as integrated PCTIM phase change materials).
AI server demand: Starting from 2024, its current shunt resistors and polymer tantalum capacitors will be widely used in Nvidia Blackwell AI servers, with orders exceeding expectations.
High frequency and miniaturization: 02016 packaged thin film resistors (0.2mm × 0.1mm) are driving the trend of miniaturization.
The core competitiveness of Weishi Resistance lies in:
Full technical coverage: from ultra-high precision of metal foil to ultra-high power of wire wound resistors, meeting extreme demands.
Scene adaptation depth: Vehicle grade high temperature resistance, aerospace grade radiation resistance, reliability certified by AECQ200/MILPRF.
Fast response at the forefront: High frequency thin film resistors support 5G/6G communication, and metal foil resistors empower precision testing equipment.
Selection suggestion: Prioritize locking the material type based on the three elements of accuracy, temperature drift, and power (such as selecting metal foil for precision measurement and thin film for high-frequency measurement), and then screen the packaging and certification level according to the application environment (temperature, voltage, vibration).