Vishay, as a leading global electronic component manufacturer, is renowned for its resistor products' technological diversity, high reliability, and precise performance. According to the technical roadmap, application scenarios, and performance characteristics, Weishi resistors can be divided into the following core categories:
1、 Classified by technical route
Thin Film Resistors
Technical features: Using vacuum deposition technology to form nanoscale alloy thin films on ceramic substrates, with low noise, high precision (tolerance as low as ± 0.05%), and excellent high-frequency characteristics (supporting up to 70 GHz).
Representative series:
CHA series: certified by AECQ200, with a package size as small as 02016 (0.2mm × 0.1mm), suitable for automotive ADAS, LiDAR, and satellite communication systems.
PEP series: ultra-low noise (<35 dB), operating temperature from 55 ℃ to+155 ℃, used for avionics and precision instruments.
Typical applications: 5G base station RF matching, medical equipment signal processing.
Wirewound Resistors
Technical features: The alloy wire is wound on the insulation skeleton, with strong resistance to high voltage and pulse (such as withstanding 5kW pulse within 1 μ s), and the silicone coating supports extreme temperatures from 55 ℃ to+250 ℃.
Representative series:
AC series: Axial cement resistor, optional SMD pin bending design (such as AC05 WSZ), used for industrial surge suppression and automotive pre charging circuits.
Typical applications: frequency converter braking, current limiting for welding machines.
Thick Film Power Resistors
Technical features: Alloy slurry is sprayed onto ceramic substrates, with low cost and high mechanical strength. The heat dissipation efficiency is improved through optimized packaging design (such as bare aluminum substrates).
Representative series:
LTO 150H: TO247 package, with a pulse absorption capacity of 75 J/0.1s and a power dissipation of 150W, used for electric car chargers.
ISOA200: SOT227 package, power 200W, optional integration of NTC thermistor and phase change heat dissipation material (PCTIM), simplifies thermal management design.
Typical applications: industrial motor drive, photovoltaic inverter.
Metal foil resistor (Bulk Metal) ® Foil Resistors）
Technical features: Weishi patented technology, temperature coefficient (TCR) as low as ± 0.2 ppm/° C, accuracy of ± 0.001%, excellent long-term stability.
Representative series: VHP100 series, not discontinued for 55 years, used for metrology calibration and aerospace sensors.
Typical applications: high-precision voltage reference, laboratory standard instruments.
2、 Classified by Function and Scene
High power resistor
Features: Power coverage ranging from several watts to several hundred watts, enhanced heat dissipation design (such as clip on TO packaging), and support for sustained high loads.
Application: Electric vehicle BMS discharge resistor, energy storage system buffer circuit.
Low temperature drift resistor
Features: TCR below 50 ppm/° C, highly adaptable to the environment, and resistance minimally affected by temperature fluctuations.
Application: Precision instruments, temperature control systems.
Anti pulse/surge resistor
Technical solution:
Thick film resistor: such as D2TO35H (TO263 package), pulse absorption of 15 J/0.1s, used for 48V board mesh protection.
PTC Thermistor: The PTCEL series can absorb up to 240J of energy and support 100000 surge cycles, used for overload protection of car chargers.
Application: Industrial power surge suppression, emergency battery discharge.
High frequency and miniaturized resistors
Features: Ultra small package (such as 02016), low parasitic reactance, flat Z/R curve.
Applications: Millimeter wave radar, LEO satellite communication.
3、 Customization and layout in emerging fields
Customized services: Support customized resistance, packaging, and heat dissipation solutions (such as thick film resistor integrated NTC) to meet special military/aerospace needs.
AI and Automotive Electronics:
Current shunt resistors are used for current detection in Nvidia AI servers.
Polymer tantalum capacitors (vPolyTan) are paired with MOSFETs to serve Blackwell architecture power management.
Summary: Technical Matrix and Core Advantages
Weishi Resistors covers all scenario needs through diversified technology routes, and its core competitiveness lies in:
Precision technology layering: from ± 0.001% precision foil resistors to 75J anti pulse thick film resistors, matching different precision and power requirements;
Vehicle grade reliability: The main series has passed AECQ200 certification and supports wide temperature operation from 55 ℃ to+175 ℃;
System integration innovation: such as integrated design of resistor NTC thermistor, reducing customer BOM complexity.
>Weishi's concept of "The DNA of tech" has supported every technological leap from space communication to the AI revolution by taking basic components such as resistors to the extreme.