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Vishay Intertechnology Optocouplers for High Robustness and Noise Isolation

Vishay Intertechnology 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 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.

Vishay Intertechnology Optocouplers

The optocouplers 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

SeriesPackage versionDevice number
VOT8024A
(zero crossing)
DIP-4VOT8024AD
DIP-4, 400 milVOT8024AG
SMD-4VOT8024AB
VOT8121A
(non-zero crossing)
DIP-4VOT8121AD
DIP-4, 400 milVOT8121AG
SMD-4VOT8121AB

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

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Jyoti Gazmer

A Mass Comm. graduate believes strongly in the power of words. A book lover who dreams to own a library some day. An introvert but will become your closest friend if you share mutual feelings about COFFEE. I prefer having more puppies over humans.

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