Our relay modules quickly and reliably switch many switching operations.The KY-019 relay module is used to control AC circuits and switches them ON or OFF.The relay is one of the most important control elements. It is an electrical switch that responds to a signal received from the microcontroller (as in the Raspberry Pi).Relays are widely used in remote control, communication, mechatronics devices, power electronics devices, etc. They can also be used to separate high voltage/current electronics (such as AC or DC motors or any AC devices, etc.) from low voltage/current electronics (such as microcontrollers, sensors, etc.). Particularities Generously dimensioned relays to reliably perform many switching operations. Practical mounting holes allow the module to be securely mounted in enclosures. Equipped with transistor and diode to switch higher loads safely, reliably and with low current. Additional LED that indicates the switching state of the relay. Technical specifications Type 1-channel Dimensions 27 mm x 34 mm Maxium DC 5 a 30 V Maximum ac 5 a 50 V TTL tax signal 3.3V to 5V DC Contact type Both: Usually closed - NC, usually open - NO
