DC 12V Normally Open Time Delay Relay Key benefits Flexible timing control: delay on or delay off functions with eight time ranges from 1 second to 1 hour to match different automation needs. Handles substantial loads: suitable for various applications with ratings up to 250V AC at 10A or 30V DC at 10A. Reliable protection: includes a power reversal protection diode to improve module safety and longevity. Simple adjustment: easy to set with a delay adjustment potentiometer. Compatible and durable: designed as a NO contact timing relay, robust enough for continuous operation in automation circuits. What it does The DC 12V Normally Open Time Delay Relay provides timed control of a load. The normally open contact closes after the selected delay, allowing a controlled on operation, or can be used to hold off activation for a set period. Key features Timer function: supports delay on and delay off operation with eight selectable time ranges. Delay can be set from 1 second up to 1 hour for precise timing control. Protection and capacity: power reversal protection diode improves protection; supports large current loads up to 250V AC 10A or 30V DC 10A. Easy adjustment: delay time set via a potentiometer. Contact configuration: Normally Open (NO) Timing ranges: eight ranges, 1 s to 1 h Load ratings: up to 250V AC at 10A or 30V DC at 10A Protection: power reversal protection diode Practical applications Lighting control: enable delay on lighting circuits so lights turn on or off after a set delay, reducing flicker and saving energy. Pump and valve sequencing: start or stop pumps and actuators after a defined delay to avoid inrush and coordinate system sequences. Environmental and HVAC control: maintain a hold time for fans, dampers, or climate control equipment after a sensor triggers, improving stability and comfort. Notes The output is a Normally Open contact, suitable for controlling external loads when the delay period ends. Ensure the control signal and load wiring comply with the specified voltage and current ratings.