About resistor operating frequency and load characteristics
working frequency:
The frequency characteristics should be considered when the resistor is applied to the AC load. When the frequency is increased, the resistance value of the resistor will significantly deviate from the nominal value due to the factors of the distributed capacitance, skin effect, dielectric loss resistor, and leads due to leads. The working frequency of the winding resistor is generally not higher than 50 kHz, and the operating frequency of the freely winding resistor can be up to 1 MHz.
Load characteristics:
The resistance values ??of the resistor are exchanged, and the DC load is not larger than the power rated value PR. When the resistor is used in ambient temperature TA than the allowed ambient temperature TR, the relationship between power P and nominal rating is: P = Pr (TA-TR) (Tmax-Tr), that is, PR should be used. At the pulse power, the resistor peak power may be several hundred times more, the main limit factors are:
1. The voltage is too high to cause interlayer breakdown;
2, the pulse current is too large to exceed the allowed current density. The resistor is subject to the order of pulse load capacity is a winding resistor, a carbon film resistor, a metal membrane resistor, a metal oxide resistor, a synthetic real resistor, a high pressure glass glaze resistor, stainless steel resistor.