PEWM3920DL500K9

High-precision low-inductance pure alloy shunt resistors are manufactured using a precision resistive alloy developed in-house by Kaimite Electronics. After precision machining, the components are joined using dedicated electron beam welding equipment. By combining tight control over alloy consistency, precision machining capability, and high-quality welding, the products achieve a target accuracy of up to ±0.5% after stamping without any trimming. This series features a temperature coefficient of ≤±100ppm/°C over the range of +20°C to +170°C and an inductance of <3nH. The "Trimming Free" technology eliminates the rated current derating and current-crowding hot spots associated with post-stamp trimming, thereby enhancing product reliability. In addition, the improved welding quality reduces the thermoelectric potential of the products and improves long-term stability. From raw materials to core equipment and key processes, this series is fully under in-house control, ensuring consistent quality and on-time delivery.

Applications

• Automotive electronics, medical devices, precision power supplies, battery grading & formation, power tools

Key features

• Resistance range: 0.3mΩ～1.0mΩ
• Accuracy up to ±0.5%
• Temperature coefficient ≤±100ppm/°C
• Rated current: 89A～182A
• Inductance <3nH