5V 12V 24V Relay Module with Optocoupler Relay Output 8 Way Relay Module for Arduino

An “8-way 12V relay” likely refers to a relay module with eight individual relay channels, and each relay operates with a 12-volt power supply. Relays are electromechanical switches that are commonly used to control high-power devices with low-power microcontrollers or digital signals.

Here’s a breakdown of what each part of the description typically means:

1. 8-way: This indicates that the module has eight separate relay channels. Each channel can be controlled independently.
2. 12V relay: This signifies that each relay on the module operates with a 12-volt power supply. The relay coil requires a 12V input to activate the switch.