2 Channel 5V Solid State Relay SSR Module

Electromagnetic Relays are not very different in operation from Solid State Relays (SSR). The electromagnetic relays use moveable contact in opration, whereas SSR use semiconductors for no-contact operation. That means there is no mechanical contacts in SSR. 

Features: 

• No reverse-surge voltage 
• Low current consumption 
• No bounce or chattering 
• No Arc
• No operation sound 
• Long lifetime