For Home Appliances and Industrial Equipment, Devices With Phototriac Output Feature 1000 V/μs dV/dt

Vishay Intertechnology, Inc. (NYSE: VSH) today 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 off 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 announced today isolate low voltage logic from 120 VAC, 240 VAC, and 380 VAC 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 GaAs infrared LED optically coupled to either a zero-crossing TRIAC (VOT8024A series) for 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 the VOT8024A and VOT8121A series enhance safety margins in one-phase applications while 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, and power line switching, and motor, lamp and valve control in household appliances.

Product options table

Samples and production quantities of the VOT8024A and VOT8121A are available now, with lead times of six weeks.

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