3920 0.004R (4m Ohm) 4W ±1% Metal Shunt Chip Resistor for Industrial Electronics

In industrial electronic control, new energy energy storage, precision power detection and other electronic fields, low-resistance and high-power shunt resistors are core components for current collection, circuit voltage stabilization and overload protection. The 3920 0.004R(4m Ohm) 4W 1% ESR39F4WR004F02G Metal Shunt Chip Resistor has become a preferred shunt component for mid-to-high-end electronic circuits due to its excellent physical properties, stable electrical parameters and environmentally friendly production standards. This 3920 0.004R(4m Ohm) 4W metal shunt chip resistor adopts standardized 3920 chip package specification, with an accurate resistance of 0.004 Ohm (4 milliohm), a rated power of 4W, and a precision error strictly controlled at ±1%. It is suitable for current detection and shunting operations under various harsh working conditions, and widely used in industrial control motherboards, automotive electronics, energy storage inverters, precision instruments and other equipment.

The product model code is ESR39F4WR004F02G, and the coding logic clearly corresponds to the core parameters of the product. 39 represents the 3920 package size, F represents the precision grade, 4W indicates the rated power, and R004 defines the ultra-low resistance of 0.004R. It is a high-quality product with standardized coding in the electronic industry, facilitating procurement, model selection and batch adaptation. Compared with ordinary carbon film resistors and thick film chip resistors, this 3920 0.004R(4m Ohm) 4W resistor abandons the shortcomings of traditional materials, and uses FaCrAl iron-chromium-aluminum alloy as the resistor body, optimizing the heat resistance, conductivity and impact resistance of the product from the raw material level, and laying a foundation for high precision and high stability.

Made of high-quality FaCrAl iron-chromium-aluminum alloy, the resistor has the advantages of stable resistivity, high temperature resistance, oxidation resistance and corrosion resistance. With an integrated metal stamping molding process and precision beam welding packaging technology, the electrode and the resistor body are closely bonded to reduce contact resistance and avoid virtual connection failure caused by power-on heating. It has an excellent low temperature drift characteristic. Within the wide operating temperature range of -40℃ to +155℃, the resistance will not fluctuate greatly with ambient temperature and power-on heating. The optimized internal conductive structure enhances pulse impact resistance, and it will not have faults such as sudden resistance change and breakdown burnout when encountering instantaneous surge current and voltage fluctuation of the circuit.

This 3920 0.004R(4m Ohm) 4W metal shunt chip resistor strictly complies with international environmental protection production specifications. It adopts lead-free production technology and has passed RoHS and REACH environmental protection certifications. It contains no harmful heavy metals and meets the environmental compliance standards of the global electronic industry. With the comprehensive advantages of ultra-low resistance of 0.004R, high power of 4W, high precision of ±1%, low temperature drift and strong anti-surge capability, it is widely used in new energy lithium battery protection boards, industrial servo drives, automotive electronic control modules, precision medical instruments and other products. As a cost-effective and practical high-quality component, it provides reliable guarantee for current monitoring and overload protection of various electronic circuits.