An optoisolator (also known as optical coupler, optocoupler and opto-isolator) is a semiconductor device that uses a short optical transmission path to transfer an electrical signal between circuits or elements of a circuit, while keeping them electrically isolated from each other.Optoisolators - Logic Output are in stock at Tenco Electronics. Tenco offers inventory, pricing, & datasheets for Optoisolators - Logic Output. To know more, please view our large section of multi-directional switches below.