This circuit is to use to protect any electricity products in your home, DVD player, Home theater, TV or any consumer products which is sensitive to unstable AC line. Voltage over / under.

Already assembled and tested !!

Technical information:
- Work with 220VAC line
- Over voltage protection ( can be adjusted 240 VAC to 300VAC )
- Under voltage protection ( can be adjusted 210 VAC to 167 VAC )
- 3 minutes delay to turn on ( To prevent unstable voltage / spike during under/over voltage happen )
- Including transformer as photo
- Relay 12VDC / 600W at 220VAC
- PCB size 3.64" x 2.25"
- Comes with the instruction how to use in image and schematic. Easy to understand.

Once board can detect over or under voltage, relay on board will automatic off after that the voltage in AC line is back to noraml at 220VAC. It's possible that this time, voltage may be not stable. So, Relay on board has to keep turn off ( 3 minutes ) to make sure that your application is safe.

Download User Manual