Vishay Intertechnology Inc. has broadened its optoelectronics portfolio with the release of two new series of optocouplers with phototriac output in space-saving compact DIP-4 and SMD-4 packages. Featuring a high 
Source: Vishay Intertechnologyoff‑state voltage of 800 V and dV/dt of 1000 V/μs, Vishay Semiconductors’ VOT8024A and VOT8121A series deliver high robustness and noise isolation for home appliances and industrial equipment.
The optocouplers isolate low voltage logic from 120 V AC, 240 V AC and 380 V AC lines to control resistive, inductive or capacitive loads, including motors, solenoids, high current thyristors, or TRIACs and relays. Reducing design costs and saving board space, the devices consist of a gallium arsenide (GaAs) infrared light emitting diode (LED) optically coupled to either a zero-crossing TRIAC (VOT8024A series) for electromagnetic interference (EMI) reduction without the need for external snubber networks, or a random-phase TRIAC (VOT8121A series) to enable phase-independent switching.
The high off-state voltages of both VOT8024A and VOT8121A series enhance safety margins in one-phase applications, while still maintaining enough voltage headroom for three-phase applications. For additional safety, the optocouplers offer a withstanding isolation voltage of 5000 VRMS. Low trigger currents of 5 mA for the VOT8024A series and 10 mA for the VOT8121A series facilitate an easy interface with digital logic.
Typical applications for the RoHS-compliant optocouplers include power TRIAC drivers in solid-state relays, three-phase air conditioners, boilers, thermostats, industrial motor control, power line switching, and motor, lamp and valve control in household appliances.
Source: Vishay Intertechnology
Samples and production quantities of the VOT8024A and VOT8121A are available now, with lead times of six weeks.
