Welding resistor,Using high quality materials,Manganin, karma,With low temperature coefficient,Temperature coefficient within 20ppm,Advanced welding technology,The precision can reach 1%，Over current，The current nearly reached 200A，Power up to 7 watts，Low resistance，Micro ohm resistance range 200 -3 milliohms，thermostability，Resistance to moisture，High reliability，Small size，Suitable for wave soldering and reflow soldering，Large-scale production，A high degree of mechanization.