Phototriacs are used as a switch for AC loads and as a pre-driver for larger TRIACs or silicon controlled rectifiers. As a subcategory of optocouplers, they protect sensitive, low voltage control electronics from higher voltage transients or spikes. And, they are found everywhere in your house or apartment.
Phototriacs are either zero crossing or non-zero crossing. Vishay has an extensive portfolio of each type with a select few shown in the table below. In addition, Vishay also offers the VO2223 Power Phototriac which features a phototriac driving a TRIAC with output currents of 0.9A and 1.0A.
|Crossing||Part Number||Package||IFT (mA)||dV/dt min (V/μs)||VISO (VRMS)||VDRM (V)||Operating Temperature (°C)|
|Zero Crossing||VO3062 VO3063||6-pin DIP or SMD||5, 10||1500||5300||600 800||-40 to +100|
|Zero Crossing||IL410 IL4108||6-pin DIP or SMD||2||10000||5300||600 800||-40 to +100|
|Non-Zero Crossing||VO3052 VO3053||6-pin DIP or SMD||5, 10||1500||5300||600||-40 to +100|
|Non-Zero Crossing||IL420 IL4208||6-pin DIP or SMD||2||10000||5300||600 800||-40 to +100|
|Non-Zero Crossing||K30 Series||6-pin DIP or SMD||5, 10, 15||10||5300||250 400||-40 to +85|
|Power Phototriac||VO2223 VO2223A||8-pin DIP||10||210||5300||600||-40 to +85|