Vishay, as a leading global manufacturer of discrete electronic components, is renowned for its precision resistor products with ultra-high precision, excellent stability, and diversified technology routes. The core series and characteristics are classified according to their core technologies as follows:
1、 Metal foil resistor (Bulk Metal) ® Coil Technology)
Weishi pioneered this technology in 1962 and remains a benchmark in the field of ultra-high precision to this day
VHP100 series: Provides ± 0.001% tolerance and ± 0.2 ppm/° C ultra-low temperature drift (TCR), suitable for temperature drift sensitive scenarios such as metrology calibration and aerospace equipment.
Surface mount and through-hole discrete resistor network: supports high-density PCB design, used for precision instruments and hybrid circuits, with stability reaching parts per million (ppm level).
2、 Thin film resistor
Realize high-frequency and low-noise characteristics through sedimentation technology, covering high-end communication and medical needs:
CHA series: supports 70 GHz high-frequency applications (such as 5G base station RF matching, satellite communication), 02016 package size is only 0.2mm × 0.1mm, and has passed AECQ200 automotive certification.
PEP series: accuracy ± 0.05%, noise<35 dB, suitable for avionics systems and precision medical equipment (working in a wide temperature range of 55 ℃ to+155 ℃).
MPP series (metal film wafer resistors): Combining low-temperature drift and low noise, used for audio amplifiers and measurement and control systems.
3、 Alloy resistor (dedicated for current detection)
Characterized by low resistance and high power density, used for power management and motor control:
WFMB/RCWE/WSL2512 series: resistance of 1m Ω -200m Ω, temperature coefficient of 50-100 ppm/° C, 2512 package supports 1W power (such as model WSL2512R0120FEA18), used for electric vehicle BMS current sampling.
SMPD Package Series: Ultra thin design (1.7mm), supports 30A high current, compatible with TO263 package, suitable for overcurrent protection in fast charging circuits.
4、 Wire winding and high-power resistors
Implementing pulse resistance and heat dissipation optimization through winding structure, targeting industrial and automotive high-voltage scenarios:
AC series cement resistor: Added WSZ pin bending option (such as AC05 WSZ), supports 5kW/1 μ s pulse load, working temperature from 55 ℃ to+250 ℃, certified by UL 94 V0, used for automotive pre charging circuits and industrial surge suppression.
FNP series: 500W high-power shunt resistor, used for energy management systems (such as photovoltaic inverter braking).
ISOA200 thick film resistor: SOT227 package supports 200W power+140J pulse energy, optional integrated NTC thermistor simplifies thermal management.
5、 Metal film wafer resistor (general precision field)
Balancing accuracy and cost, covering industrial and consumer electronics:
MRS series: Low temperature drift (± 10 ppm/° C), high stability, used for precision instruments.
MCT series: Optimized for low noise characteristics, suitable for audio devices and communication modules.
CRCW thick film series: 0603 package enhances power to 0.25W, anti pulse design, used for automotive BMS (such as resistance 4.7 Ω± 1%).
6、 Aluminum shell resistor (industrial grade power dissipation solution)
Aluminum alloy shell improves heat dissipation efficiency and adapts to harsh environments:
PR01 series: 10W-50W high power, impact resistant and corrosion-resistant design, used for motor drive and electric braking.
PR04 series: High temperature resistance up to+350 ℃, suitable for aerospace engine control.
PR06 series: Low noise audio grade resistors optimize the signal purity of HiFi devices.
Selection Summary
|Application scenarios | Recommended series | Core advantages|
|Metrology/Aerospace Calibration | VHP100 Foil Resistance | ± 0.001% Accuracy, ± 0.2ppm/° C TCR|
|5G/Satellite Communication | CHA Thin Film Resistors | 70GHz High Frequency, 02016 Micro Package|
|Electric vehicle BMS | WSL2512 alloy resistor | 1m Ω low resistance, 2512 package power enhanced|
|Industrial pulse load | AC05 WSZ cement resistor | 5kW/1 μ s anti pulse, UL94 V0 certification|
|Inverter/power brake | FNP thick film resistor | 500W high-power shunt|
|High temperature industrial environment | PR04 aluminum shell resistor |+350 ℃ working temperature|
Weishi Precision Resistors use Bulk Metal ® The foil technology is the pinnacle of precision, and the thin film/alloy resistors meet the requirements of high-frequency and current detection, while the wire wound/aluminum shell series provides industrial grade reliability and heat dissipation capabilities. The selection needs to comprehensively consider the four-dimensional parameters of accuracy, temperature drift, power density, and pulse toughness, and adapt to the extreme requirements of different scenarios.