Malvern, Pa. — Vishay Intertechnology Inc. has introduced two non-zero-crossing 1.5-kV/us dV/dt phototriac optocouplers that are designed to isolate low-voltage logic from AC voltages up to 380 V. The VO3052 and VO3053 phototriacs are designed for control of resistive, inductive, or capacitive loads including motors, solenoids, high-current thyristors, and relays. Optimized for noisy environments, key applications include refrigerators, air conditioners (HVAC), dishwashers, vending machines, industrial controls, AC motor drives, switches, switching power supplies, and solenoid/valve controls.

The VO3052 and VO3053 phototriacs consist of a GaAs infrared LED that is optically coupled to a monolithic photosensitive zero-crossing triac detector chip. A low-input trigger current facilitates an easy interface with microcontrollers and digital logic, said the company. The VO3053 requires a maximum trigger current of 5 mA to latch output, while the VO3052 requires a maximum trigger current of 10 mA. The devices are offered in the 6-pin DIP package. Rated with a 600-V blocking voltage, the phototriacs can provide isolation between DC and AC voltages on 120-V and 240-V AC lines, giving designers a 2x or better safety factor for control of off-line voltages up to 240 V. The devices are RoHS compliant and lead free. Click the link for the VO3052 and VO3053 datasheet.

The VO3052 and VO3053, in which the new "VO" part number prefix indicates "Vishay optocoupler," are direct replacements for industry-standard 1.0-kV/us dV/dt phototriacs and companion devices to Vishay's zero-crossing VO3062 and VO3063 1.5-kV/us dV/dt phototriacs.

Pricing for U.S. delivery ranges from $0.50 to $0.61 each in quantities of 10,000, depending on the blocking voltage and trigger current values. Samples and production quantities of the VO3052 and VO3053 phototriacs are available now, with lead times of six to eight weeks for larger orders.

Vishay Intertechnology, 1-619-336-0860, www.vishay.com