Nanjing SART Technology, as a national level specialized and innovative "little giant" enterprise, has been deeply involved in the field of electronic circuit protection for nearly 20 years. Its resistor products have high precision, high reliability, and customization capabilities as their core competitiveness, and are widely used in high demand scenarios such as automotive electronics, industrial control, and new energy. Based on their technical roadmap and product matrix, systematically sort out the three major resistor series:
1、 Product series and technical characteristics
Alloy film precision resistor (SMD series)
Process principle: Using metal foil process technology, an alloy layer is formed by vacuum sputtering to achieve ultra-low resistance (2m Ω~700m Ω) and high power density (0.5W~5W).
Core advantages:
Low temperature drift coefficient (± 50ppm/℃): The resistance value fluctuates minimally under temperature changes, making it suitable for automotive BMS systems with strict temperature control.
Low inductance design: parasitic inductance<1nH, avoiding signal distortion in high-frequency circuits (such as 5G base station power supply).
Packaging diversity: covering the full size range of 0603~4320, suitable for high-density PCBs and industrial high-power modules.
Alloy stamping precision resistor
Manufacturing technology: relying on precision stamping forming technology, combined with nickel chromium/manganese copper alloy materials, to achieve milliohm resistance (0.1m Ω~10m Ω) and ultra-high power (up to 15W).
Differentiated features:
Anti mechanical stress: Designed with structural reinforcement to withstand automotive electronic vibration environments (compliant with AECQ200 standards).
Pulse current resistance: Supports instantaneous current surge (such as charging pile start stop), with surge resistance up to 1.5 times that of similar products.
Thick film chip precision resistor
Technical positioning: Targeting cost sensitive projects, providing a balanced solution with ± 0.5% accuracy and ± 100ppm/℃ temperature drift in general scenarios.
Innovation direction:
High voltage withstand type: Develop special models with a withstand voltage of 1000V or above (such as ARHV series) for photovoltaic inverter busbar testing.
Anti sulfurization coating: Added passive nickel chromium layer, tested at 85 ℃/85% humidity, suitable for high corrosion environments along the coast.
The following table compares the core parameters of the three major series:
|Series | Resistance Range | Accuracy | Power | Temperature Drift Coefficient | Typical Application Scenarios|
|Alloy film (SMD) | 2m Ω~700m Ω | ± 1% | 0.5W~5W | ± 50ppm/℃ | Car charger (OBC), server power supply|
|Alloy stamping | 0.1m Ω~10m Ω | ± 0.5% | 1W~15W | ± 75ppm/℃ | Electric vehicle BMS, industrial frequency converter|
|Thick film patch | 1 Ω~10M Ω | ± 0.5% | 0.25W~2W | ± 100ppm/℃ | Consumer electronics power supply, medical equipment control board|
2、 Core performance advantages
Material Innovation
By using graphene composite substrates and nanoscale alloy films, the thermal conductivity efficiency is improved (by 30% compared to traditional resistors), and the risk of high-temperature failure is reduced.
Vehicle grade reliability
Through IATF16949 system certification, the working temperature ranges from 55 ℃ to 150 ℃, meeting the requirements of engine compartment peripheral devices (such as SK series automotive resistors).
Precision manufacturing system
Fully automated production process (cutting accuracy ± 0.01mm), combined with laser resistance adjustment technology, ensures resistance consistency (batch deviation<0.1%).
3、 Deep adaptation to application scenarios
New energy and energy storage:
In energy storage systems (ESS), SMF series resistors (5W power) are used for battery pack current sampling with an error rate of less than 0.3%.
Automotive Electronics:
SK series resistors are integrated into the OBC module to achieve 100A high current monitoring and support fast charging piles on 800V high-voltage platforms.
Industrial automation:
The SM series resistor (resistance 5m Ω) in the servo drive ensures the stability of motor torque control with an accuracy of ± 0.1%.
4、 Service and Market Positioning
Customized response: Supports 72 hour quick sampling, providing non-standard resistance and irregular packaging (such as customized heat dissipation substrates) design.
Localization advantage: Compared to international brands such as Vishay, the price is 15% to 20% lower; Compared to domestic competitors such as Fenghua High tech, the yield rate of automotive grade products is 8% higher.
Ecological Collaboration: Collaborate with Huawei and Purple Mountain Laboratory to develop 5G base station specific resistors and promote the process of localization substitution.
Nanjing Satter Resistors takes "alloy technology+automotive grade reliability" as the technical fulcrum, and builds differentiated advantages in current sampling, high-power control and other scenarios through material innovation (such as graphene substrates) and precision manufacturing (laser resistance adjustment/automated cutting). Its core value lies in breaking the import dependence of high-end resistors - for example, the automotive grade SK series has achieved mass delivery in Tesla's supply chain. With the explosive demand for new energy and intelligent driving, Sartre's technological reserves in the fields of high voltage and ultra-low resistance will further consolidate its leading position in domestic circuit protection components.