Solid-state relays offer space-saving in a compact package

Vishay Intertechnology, Inc. has introduced two new industrial-grade 1 Form A solid-state relays in the surface-mount SOP-4 package. The Vishay Semiconductors VO1401AEFTR and VOR1003M4T combine high continuous load current of 550mA and 5A, respectively, with load voltages of 60V and 30V, isolation voltage of 3750VRMS, and low leakage current of <1µA typical.

With their high current capability, the devices are ideal for replacing electromechanical relays, which are susceptible to damaging vibrations, with contactless optical relays that provide robust, vibration-proof switching for higher reliability and a longer service life. Also, their high isolation voltage permits them to be used in harsh environments.

Offering typical turn-on and turn-off times of 1.3ms and 0.15ms for the VO1401AEFTR, and 0.5ms and 0.1ms for the VOR1003M4T, the relays will deliver fast switching for industrial automation systems and controls; security systems; medical instrumentation; and broadcasting equipment. In these applications, the devices' compact package saves board space, while the low leakage current translates into higher efficiency by helping to keep the sensitive load on the output side turned off.