As a professional electronic component manufacturer, RALEC's precision resistor product line is renowned for its high precision, high stability, and rich coverage of application scenarios. Through a comprehensive review of official information and industry applications, Wangquan Precision Resistors can be divided into the following core series:
1、 Precision thin film resistor series
Using thin film technology to achieve ultra-high precision and low-temperature drift characteristics, suitable for fields with strict stability requirements:
WMA series:
Accuracy: ± 0.01% to ± 0.1%, which is the top level in the industry.
Temperature coefficient (TCR): as low as ± 10 ppm/℃, ensuring stable resistance over a wide temperature range.
Package and Power: Covering 0402-2512 packages, with a power of 0.031W-0.5W and a resistance range of 1 Ω -4.7M Ω (depending on the package).
Typical applications: medical instruments (such as electrocardiographs), high-precision testing equipment, aerospace electronic control systems.
2、 High voltage thin film resistor series
Specially designed for high-voltage circuits, with a withstand voltage capability of thousands of volts, suitable for power supplies and industrial systems:
HVR/HVF series:
Voltage resistance level: The HVR series can withstand voltages up to several thousand volts, while the HVF series focuses on low noise and low temperature drift.
Technical features: Ceramic substrate+metal film process, excellent heat dissipation performance.
Application scenarios: power modules, medical high-voltage equipment (such as X-ray machines), industrial inverters.
HVS series:
In response to the demand for ultra-high voltage (such as power system detection equipment), insulation performance is strengthened to prevent breakdown.
3、 Anti sulfurization resistor series
By using special coatings and material processes to resist corrosion in sulfur-containing environments, reliability is improved under harsh working conditions
AS/AP series:
AS series: Basic sulfur resistant model, suitable for automotive electronics (such as engine sensors).
AP series: High power version (with a power of over 1W), suitable for industrial motor drive circuits.
AR series:
Ultra high precision (± 0.05%), used for long-term stable operation of precision instruments in sulfur-containing environments (such as chemical workshops).
4、 Precision alloy micro resistor series
Using metal alloy materials to achieve extremely low resistance and high current carrying capacity for current detection and power management:
LR series (LR1206/LR2512, etc.):
Resistance range: 0.1m Ω~200m Ω, accuracy ± 0.5%.
Power level: 1W~4W, supports high current scenarios (such as battery management system).
LR4 Terminals:
Eliminate the influence of wire resistance on the measurement end and improve the accuracy of current detection (such as power converters).
5、 Special function resistor series
Optimization design for segmented scenarios:
Current detection resistor (RCR series):
Low resistance (milliohm level)+low TCR (± 50 ppm/℃), used for BMS and motor drive.
Miniature Series (HVM):
0201/0402 ultra small package, suitable for wearable devices and high-density PCB design.
High power resistors (WP series):
Power below 50W, metal oxide film structure, used for power redundancy protection and industrial heating modules.
Selection reference table
|Series Category | Representative Model | Accuracy | Temperature Coefficient | Main Application Scenarios|
|Precision Thin Film Resistors | WMA0402 | ± 0.01% | ± 10 ppm/℃ | Medical Instruments, Aerospace Equipment|
|High voltage thin film resistor | HVR1210 | ± 0.1% | ± 25 ppm/℃ | Power module, laser driver|
|Anti sulfurization resistance | AS0805 | ± 0.25% | ± 15 ppm/℃ | Automotive sensors, industrial control systems|
|Precision alloy micro resistor | LR2512 | ± 0.5% | ± 50 ppm/℃ | Current detection BMS |
|High power resistor | WP50W | ± 1% | ± 100 ppm/℃ | Power supply heat dissipation, industrial heating|
Summary
The core advantage of Wangquan Precision Resistors lies in their ability to adapt to different scenarios
Precision control scenarios (such as medical/aerospace): Preferred WMA thin film resistors with leading accuracy and temperature drift indicators;
High voltage/high interference environment (such as industrial power supply): HVR/HVS series provides voltage redundancy and safety protection;
Chemical corrosion scenarios (such as automotive/chemical): AS/AR anti sulfurization series ensures long-term stability;
Power and space constrained design: LR alloy resistors and HVM miniature series achieve high-density integration.
Engineers can choose a series based on specific requirements such as accuracy, power, and environmental tolerance, and refer to official specifications to match packaging and resistance parameters.