Electrical and Mechanical Performance Indicators of Rotary Switch

Key technical parameters of rotary switch for engineering selection and quality inspection

Before integrating rotary switch into control panels, engineers need to check its electrical and mechanical specifications. These performance indicators directly decide the safety and service life of the whole control circuit, similar to parameter checking for toggle switches.

Core electrical parameters include rated voltage and rated current. General rotary switch supports AC 250V up to 600V and DC 400V, with current rating from several amps to 20A and above. High-quality rotary switch keeps contact resistance below 20mΩ. Its insulation resistance exceeds 1000MΩ and can pass 1500VAC dielectric withstand test. Gold-plated contacts reduce signal loss and resist oxidation for low-current signal circuits.

Mechanical performance focuses on service life and operation torque. Standard rotary switch achieves 10,000 to 50,000 operation cycles. Sealed rotary switch reaches IP65 or IP67 protection grade for dustproof and waterproof requirements. Flame-retardant housing meets V-0 fire resistance standard to lower fire risk when circuit overload occurs.

Never overload rotary switch beyond its rated parameters. Excessive current will burn contacts and cause permanent failure. Checking these indicators ensures the rotary switch matches the load requirement and runs reliably in long-term continuous operation.