Identification of Resistor Power Ratings

The rated power of the resistor refers to the maximum power that the resistor is allowed to consume in a DC or AC circuit for long-term continuous operation. There are two marking methods: resistors above 2W are directly printed on the resistor body with numbers; resistors below 2W are represented by their own volume size. When the resistance power is represented on the circuit diagram

Load characteristics When the working ambient temperature is lower than tR, the resistor cannot exceed its rated power. When it exceeds tR, the load power must be reduced. There are specified load characteristics for each type of resistor. In addition, the load is allowed to decrease accordingly at low air pressure. Under the pulse load, the average pulse power is much lower than the rated power, which is generally specified otherwise.