Specification:
Channel: 1 channel
Material: Circuit board
Control signal: TTL
Work voltage: DC 3V/3.3V
Main chip: EL817, SRD-DC03V-SL-C
Compatible Load:10A 250VAC, 10A 30VDC
Response time :Less than 20 milliseconds
Single Socket Length: 7.5:mm
Relay Size: 70mm X17mm X20mm (LxWxH)

Power interface:
1. VCC: positive pole of power supply (3v/3.3v)
2. GND: connect to the negative pole of the power supply
3, IN: high level control relay suction
Load interface:
1. NO: normally open interface of the relay. The relay is suspended before suction and shorted with COM after suction
2. COM: common interface of relay
3. NC: normally closed interface of relay, short connection between relay and COM before suction and suspension after suction

Note:
If you're switching high voltages, be very careful handling this device. The terminal block screws, in particular, are at full controlled voltages. Turn off all power off before making changes.

100% Satisfaction Guarantee:
12-Month Warranty; No satisfied, Free reason for return; Quality problem, please contact us, we will resend your FREE Replacements or make you FULL Refund.

Package include:
2pcs x1 Channel 3v Relay Board