The parameters of mainstream resistor circuit symbols product series are as follows:

1. Resistance range: from a few ohms to several megaohms 2. Power range: from 1/8 watt to several watts 3. Tolerance range: usually 1%, 5%, 10%, etc. 4. Operating temperature range: usually -55°C to +155°C 5. Package types: available in various forms such as surface mount, through hole, bolt, etc. 6. Rated voltage: usually 50V, 100V, 250V, etc. 7. Temperature coefficient: usually ±100ppm/°C, ±200ppm/°C, etc.

The above are general parameters of mainstream resistor product series, specific parameters may vary depending on the specific product model.