FUNCTION: This voltage protector instantly cuts off power in the event of overvoltage, undervoltage, or overcurrent, safeguarding your electrical equipment from damage. It automatically resets when the line voltage returns to normal. USAGE: Designed for DIN rail installation, this protector offers overvoltage and undervoltage protection, ideal for users or loads with a single-phase AC voltage of 230V, 50/60Hz, and a rated working current of 63A or less. SETTINGS: Available in 40A or 63A specifications. Power consumption: ≤ 2W. Electrical and mechanical life ≥ 4,000 times. Low energy consumption, long mechanical life. Size: approximately 81 x 36 x 60 mm/3.2 x 1.4 x 2.4 inches. APPLICATION: Overvoltage protection response time: 0.1S-10S (default 0.1s). Primarily used for overvoltage, undervoltage, or overcurrent protection in residential distribution lines or for single-phase electrical equipment. SAFETY: Pay attention to the maximum protection current. The protector's neutral line is directly connected, and there is no disconnection function. The protector will not open after a power outage if the undervoltage time exceeds 0.3 seconds. Power consumption: ≤2w Temperature: -25 ℃ ~+40 ℃ Altitude: no more than 2000m Humidity: <90 % Size: approx. 81 x 36 x 60 mm/3.2 x 1.4 x 2.4 inches Electrical mechanical life: ≥4000 times