This single relay module can be used to control lighting, electrical and other 220V equipment from an Arduino digital output. Type: Digital Single relay board Rated through-current: 10A (NO) 5A (NC) Maximum switching voltage: 5V Digital interface Control signal: TTL level Contact Rating (Res. Load):10A 277VAC/24VDC Max. switching voltage 250VAC/30VDC 250VAC/30VDC Max. switching current 10A Operate time (at nomi. Vot.): 10ms Release time (at nomi. Vot.): 5ms