High-performance timer switch with three-wire input and three-wire output, designed to address wiring limitations where neutral wire connection is not possible. Maximum load capacity up to 4 kW, eliminating the need for an external contactor in many applications. Features 17 programmable on/off settings per week, allowing scheduling from Monday to Sunday. Each time interval can be set in increments of 1 minute, with a maximum timing cycle of 168 hours (7 days). Supports temporary manual on/off operation. Once programmed, the schedule runs continuously in a repeating cycle. Suitable for use with 350V–420V AC three-phase motors and various equipment such as water pumps, pond aerators, rice drying machines, water heaters, billboards, neon lamps, exhaust fans, and more. Enables unattended operation with safe, reliable, and stable performance. Equipped with built-in battery for power failure memory. Retains settings for over 180 days during power outages, ensuring no need for reprogramming after power loss. Specifications: - Voltage: 380V/50–60Hz - Control output: 16A (three-phase direct output) - Programmable settings: 17 ON/OFF (daily/weekly) - Time range: 1 minute to 168 hours - Timing accuracy: ±1 second per 24 hours - Power failure memory: Over 180 days (built-in 1.2V battery) - Installation size: 120 x 120 x 52mm (4.7 x 4.7 x 2 inches) - Mounting method: Screw or 35mm DIN rail - Weight: Approximately 467g (16.5 oz) Package includes: 1 x Programmable Time Relay