Supply voltage

(UIN Max [VAC])

(Maximum) supply voltage (UIN Max [VAC]) refers to the maximum permissible AC voltage (in volts) that may be applied to an electrical device or circuit without damaging it or impairing its functionality. It indicates the voltage level up to which the device can be operated safely and is an important parameter for the design and protection of electrical systems. Exceeding this limit can lead to overheating, short circuits or permanent damage.