Motor Control and Switchgear

Vishay Intertechnology’s Optocouplers Offer 800 V Off-State Voltage, High Robustness and Noise Isolation

15 November 2018

Vishay Intertechnology, Inc has broadened its optoelectronics portfolio with the release of two new optocouplers with a phototriac output in the compact flat SOP-4 package. Featuring an off-state voltage of 800 V and dV/dt of 1000 V/μs, the Vishay Semiconductors VOT8024AM and VOT8121AM deliver high robustness and noise isolation for home appliances and industrial equipment. Source: Vishay Intertechnology Inc.Source: Vishay Intertechnology Inc.

The new 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 triodes for alternating current (TRIACs) and relays. Reducing design costs and board space, the devices consist of a gallium arsenide, infrared LED optically coupled to either a zero-crossing TRIAC (VOT8024AM) for EMI reduction without the need for external snubber networks, or a random-phase TRIAC (VOT8121AM) to enable phase-independent switching.

The high off-state voltage of the VOT8024AM and VOT8121AM enhances 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 3750 VRMS. Low trigger currents of 5 mA for the VOT8024AM and 10 mA for the VOT8121AM 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.

To contact the author of this article, email GlobalSpecEditors@globalspec.com


Powered by CR4, the Engineering Community

Discussion – 0 comments

By posting a comment you confirm that you have read and accept our Posting Rules and Terms of Use.
Engineering Newsletter Signup
Get the GlobalSpec
Stay up to date on:
Features the top stories, latest news, charts, insights and more on the end-to-end electronics value chain.
Advertisement
Weekly Newsletter
Get news, research, and analysis
on the Electronics industry in your
inbox every week - for FREE
Sign up for our FREE eNewsletter
Advertisement