This is DC To AC SSR-40DD 40A Solid State Relay Module offers an input of 3V-32V DC with an output voltage of 5V -60VDC at an output current of 40A.  A solid-state relay (SSR) is simply an IC that functions as a mechanical relay. The only difference between this SSR  with the mechanical relay is that there is no moving contact in a Solid-State Relay.  This SSR allows us to control high-voltage AC loads from lower voltage DC control circuitry. This achieved by using infrared light as the ‘contact,’. In short, a  solid-state relay is just an IR LED and a phototriac enclosed into a little box. Thus we make use of Phototriac coupler to turn it ON and OFF. Solid-state relays offer numerous advantages over mechanical relays. One such advantage is that they can be switched by a much lower voltage and at a much lower current than most mechanical relays. Also, as there are no moving contacts, solid-state relays switched much faster and for much longer periods without wearing out. SSR can switch current loads of up to 40A with a 3-32V DC input and zero cross trigger control method. Each one of these relays is designed with four screw terminals for use with ring or fork connectors. And enclosed in a plastic cover that slides over the top of the relay to protect the terminals. 

Specifications :

Features :

• Control current: 3-25mA DC
• Material: plastic + metal.
• Environment temperature: -30 to +75
• Long service life and high reliability.
• Reduced electromagnetic interference.
• Highly reliable, compact size designed to offer users maximum simplicity.

Package Include :

1 x SSR-40DD 40A 3-32V DC To 5-60V DC Solid State Relay