Prevent motors and other equipment from overheating or failing from not having enough voltage. When the supply voltage falls below 35% of the rated voltage, these switches will automatically turn off to protect the circuit from undervoltage. Once the power is cut, they'll keep it isolated to prevent accidental startups during inspection and maintenance.

To prevent unauthorized use of these switches, you can lock them out with a padlock (not included). Even if a padlock blocks them from physically turning off, they’ll disconnect power to the actuator if voltage falls below a safe level.