The resistance of the alloy resistor has a great relationship with the voltage, and the alloy resistor has a maximum value of the safe operating voltage. If this value is exceeded, the insulating material of the resistor may be broken down. The relationship between the withstand voltage value of the resistor and the power is P=U^2/R. If the voltage is increased, the power will increase, and the heat will be increased to cause the alloy resistance to burn.
The pressure resistance of the alloy resistor is also related to its production material, process and external dimensions. These aspects are mainly reflected in the insulation properties of the alloy resistor, and also have a great relationship with its size. Alloys with too short lengths have low pressure resistance, but this will change as the production process changes. For high-resistance alloy resistors, the rated power is not reached when the rated voltage is reached. This resistance is normally not possible to operate at rated power. For low-resistance resistors, the rated voltage is not reached when the rated power is reached. This resistor cannot be operated for a long time under the withstand voltage value, and the withstand voltage parameter is only meaningful for the instantaneous value.
The above points are important factors affecting the withstand voltage of alloy resistance. Because of the characteristics of alloy resistance, it is often used in various electronic products, such as battery protection boards, power supplies, inverters, lamps, motors, etc. In these products, the alloy resistance is mainly used for current sampling or short-circuit protection. As the alloy resistance process changes and the alloy material is used differently, its development trend will become more and more refined.
