Solid State Relay (SSR)

A solid state relay (SSR) with triac output is a device with a function similar to a mechanical relay, but purely on semiconductor-, non mechanical basis. An infrared-LED is coupled optically to a power triac within one housing. Most of the SSR are available with zero-crossing circuit. This internal circuit makes the triac switch on or off only when the applied alternating voltage is near the zero-value.

Features

• Epoxi molded body with heat sink 
• UL approval for some types available 
• Load current I_L up to 40 A
• Peak Load voltage V_B = 100 … 800 V
• Minimum trigger current I_FT= 10 .. 25 mA