I will provide you with a detailed introduction to the advantageous manufacturers of thick film low resistance resistors, divided into four parts: international leading manufacturers, domestic rising forces, emerging technology leaders, and application selection guidelines. Here are the specific contents:
1、 International leading manufacturer: high precision and automotive grade reliability
Vishay
RCAHP series: Made of sulfur resistant thick film material, with a power of 1.5W in a 2512 package size, it can withstand 100% overcurrent impact for 5 seconds. Certified by AECQ200, suitable for high sulfur and high vibration environments in automotive electronics and industrial power supplies.
Space saving design: Replace the traditional 1206 dual resistor combination with 0805 packaging, saving 75% PCB area and reducing SMT costs.
KOA (Xingya)
UR73 series (based on historical technological evolution): optimized for current detection, with a resistance as low as 1m Ω and a temperature coefficient of ± 50ppm/℃. The metal electrode structure enhances high-frequency response and is suitable for server power supplies and fast charging devices.
TT Electronics
LRF4W series: Four terminal Kelvin structure resistor, resistance range 3-100m Ω, TCR as low as 100ppm/℃, withstand double overcurrent for 5 seconds. Used for current sampling in electric vehicle BMS, with an accuracy of ± 1%.
2、 Domestic Rising Forces: Cost Optimization and Scene Customization
FOSAN (Rich Electronics)
FRR anti sulfurization series: Tested according to ASTM B80995 standard, the resistance change after 750 hours in a sulfide environment at 105 ℃ is only ± (4.0%+0.05 Ω). Power attenuation is linearly controllable (maintaining 70% load at 155 ℃), suitable for industrial frequency converters and outdoor communication base stations.
Fenghua High Tech
Vehicle grade layout: By 2025, there will be over 30 AECQ200 certified models, with 0603-2512 package power coverage ranging from 0.125W to 2W. Low resistance accuracy ± 1%, specializing in new energy electronic control and charging pile current detection, priced 15-20% lower than Japanese brands.
Shenzhen Kaishengsheng (Israel Technology Cooperation)
Alloy ultra-low resistance: resistance value 0.5m Ω -0.6 Ω, accuracy ± 0.01%, TCR ± 5ppm/℃. Adopting a three-layer protective layer heat dissipation design, the 5W power package is compatible with the 2512 size and is used for the power module of medical CT machines.
3、 Emerging Technology Leaders: Breakthrough Performance Metrics
Walter Walter
MSH series: pure metal thick film process, resistance of 0.5m Ω -0.5 Ω, accuracy ± 0.01% (medical grade). The three-layer laser protection layer structure enables the 1206 package to achieve a power of 3W and a temperature coefficient of ± 10ppm/℃ (55-150 ℃), which is applied to precision current sampling chips.
Vishay Space Compression Technology
Replacing traditional 2010 resistors with a single 1206 resistor (1.5W) saves 58% of board area and supports high-density 5G base station power design.
4、 Application Selection Guide
The following are recommended solutions for different scenarios:
|Application scenarios | Core requirements | Recommended vendors and series | Key advantages|
|Automotive Electronics | AECQ200 Certification, Vibration Resistance | Vishay RCAHP, Fenghua High Tech | Sulfur Resistance, 55-150 ℃ Full Temperature Stability|
|Industrial power supply | Sulfur resistance, high overcurrent capability | FOSAN FRR, TT LRF4W | 100% overcurrent tolerance, high temperature power attenuation linearization|
|Medical/Precision Instruments | 0.01% Accuracy, 5ppm TCR | Kaishengsheng Alloy Resistors, Huade MSH | Pure Metal Process, Three Layer Heat Dissipation Protection|
|Consumer Electronics | Small Package, High Cost Performance | Fenghua High Tech, Yageo MSTC Series | 0201 Ultra Thin Package, ± 1% Accuracy|
Derating design tip: It is recommended that the actual power not exceed 60% to 80% of the nominal value (such as a 1W resistor load ≤ 0.6W), which can extend the lifespan by 3-5 times.
The field of thick film low resistance resistors presents a dual track pattern of "leading international technology+customized replacement by domestic manufacturers": European, American, and Japanese manufacturers (Vishay, KOA) dominate high-precision and automotive standard scenarios; Domestic forces such as Fenghua High Tech and FOSAN have entered the industrial and consumer electronics sectors with their advantages in sulfur resistance and low cost. The focus of future competition will be on ultra-low TCR (<10ppm), 01005 miniaturization, and copper substrate high heat dissipation technology.