The following is a comprehensive introduction to RALEC power resistors, based on their technical characteristics, product line, and application scenarios:
1、 Brand background and core technology
RALEC was founded in 1994 and is a subsidiary of Taiwan's Chi Li Xin Group. It focuses on the research and production of chip resistors, resistor networks, and metal plate current detection resistors. The company has production bases in Kaohsiung, Taiwan, Kunshan, China, Yuanling, Hunan, and Malaysia, and has obtained international certifications such as ISO 9001 and IATF 16949. Its products comply with RoHS standards and are widely used in high reliability fields such as automotive electronics, communication equipment, and industrial control.
2、 Technical characteristics of power resistors
Wangquan power resistors are designed with metal alloy materials and high power density as their core, and have the following advantages:
High power carrying capacity
Using manganese copper alloy or iron chromium aluminum alloy as resistance materials, it is resistant to high temperatures (up to 150 ℃) and oxidation, supporting high current (>158A) and high power density applications.
Low resistance and high precision
The resistance range is as low as 0.2m Ω, with a standard accuracy of ± 1%, and some models can reach ± 0.5%, suitable for precision current detection and shunt.
Low temperature drift characteristics
The temperature coefficient (TCR) is as low as ± 15ppm/℃, ensuring stable resistance in a wide temperature environment.
Patent encapsulation technology
Adopting patented copper terminal forming technology, it improves thermal conductivity efficiency and reduces electromagnetic interference (EMF), suitable for high-frequency and high load scenarios.
3、 Main power resistor product series
Wangquan's power resistors cover multiple types, and the following are its core series:
LRS series (automotive alloy current sensing resistor)
Four terminal design, low inductance value (<5nH), suitable for high-precision current detection in automotive ECU, battery management system (BMS), etc.
LR series (metal alloy resistors)
Long electrode structure, supporting high current heat dissipation, typical models such as LR120621R025F4 (0.025 Ω± 1%, 1206 package), used for power management and industrial equipment.
LRH series (low inductance alloy resistor)
Optimize parasitic inductance (<3nH), suitable for high-frequency switching power supplies, inverters, and other scenarios.
Four terminal resistor (such as LR4 series)
Reduce measurement errors through Kelvin connections for precision instruments and sensors.
4、 Typical application areas
Wangquan power resistors are widely used in the following fields due to their high reliability and performance advantages:
Automotive Electronics
Current detection and protection in engine control unit (ECU), on-board charger (OBC), and battery management system (BMS).
New energy and industrial power supply
Energy conversion and power regulation in solar inverters, charging stations, and frequency converters.
Communication equipment
Current sampling and diversion of high-power density circuits such as 5G base station power supplies and routers.
Aerospace and Military Industry
A power system and sensor control with high reliability requirements.
5、 Competitive Advantage and Certification
Technological Leadership
Adopting thin film packaging technology and precision photolithography process to achieve a balance between miniaturization and high performance.
Global supply chain support
Our production bases are located in multiple parts of Asia, ensuring fast delivery and cost control.
Industry certification
Passed certifications such as AECQ200 (automotive regulations) and ISO 14001 (environmental protection) to meet stringent environmental requirements.
6、 Selection suggestions
Parameter matching
Attention should be paid to resistance, power (such as 1206 package power of about 0.25W), temperature coefficient, and package size.
Alternative solution reference
If you need a cost-effective solution, you can compare Yageo's PLT series or Vishay's VNet series; If pursuing the ultimate low-temperature float, ROHM's PMR series can be considered.
If specific model parameters or application support are needed, resistance codes or circuit requirements can be provided for further analysis!
