ترایاک

Also known as triode for alternating current, bidirectional triode thyristor, bilateral triode thyristor, symistor, symmetric thyristor

A TRIAC (triode for alternating current; also bidirectional triode thyristor or bilateral triode thyristor) is a three-terminal electronic component that conducts current in either direction when triggered. The term TRIAC is a genericized trademark.

Key facts

Electronic component.name: TRIAC
Electronic component.image: Kyocera FS-C5200DN - Murata MPS7511 power supply board - Renesas BCR12PM-14L-5156.jpg
Electronic component.caption: A small plastic-cased TRIAC device mounted on a printed circuit board
Electronic component.type: Active
Electronic component.symbol: 90px
Electronic component.pins: Terminal1, gate and Terminal2

via Wikipedia infobox