フォトカプラ

An OptoCoupler is a device that is a combination of a LED and a photo sensor which allows the optical signals to be transferred between two electrically isolated systems or circuits. An Optocoupler is also known as an Opto-isolator or Photo-coupler.
フォトカプラ Products under オプトエレクトロニクス

フォトカプラ - メーカー