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Application Scenarios and Electrical Parameters of Rotary Power Switches

Application Scenarios

1. Industrial Equipment
   • Motor speed regulation, power distribution cabinet switching, and parameter setting for instruments (e.g., multimeter range selection).
2. Consumer Electronics
   • Volume adjustment for audio devices, channel switching for retro radios, and brightness level control for projectors.
3. Automotive and Marine
   • On-board power distribution (e.g., cigarette lighter, auxiliary power switches) and function mode selection for marine instrument panels.
4. Medical Equipment
   • Brightness adjustment for surgical lights, power level setting for physiotherapy devices, and program mode switching for laboratory equipment.
5. Household Appliances
   • Oven temperature level control, electric fan speed adjustment, and power switching for retro-style appliances (e.g., coffee machines).

Electrical Parameters

1. Rated Voltage
   • The maximum voltage the switch can safely handle (e.g., 250V AC/30V DC).
2. Rated Current
   • The maximum current the switch can carry continuously without overheating (e.g., 10A/5A).
3. Contact Resistance
   • The electrical resistance between closed contacts, typically required to be low (e.g., ≤50mΩ) for stable conductivity.
4. Insulation Resistance
   • The resistance between non-conductive parts, requiring high values (e.g., ≥100MΩ) to prevent leakage.
5. Dielectric Withstand Voltage
   • The voltage that the insulation can withstand without breakdown (e.g., 1500V AC for 1 minute).
6. Operating Frequency
   • The number of operations the switch can handle per minute (e.g., 30 cycles/min for continuous use).
7. Electrical Life
   • The total number of operations the switch can perform within rated parameters (e.g., ≥10,000 cycles).
8. Contact Material
   • Materials used for contacts (e.g., silver-plated copper, gold-plated) affecting conductivity and durability.