TRIAC Three Terminal Semiconductor Device

The TRIAC is a three terminal semiconductor device for controlling current. It gains it's name from the term TRIode for Alternating Current.

It is effectivly a development of the SCR or thyristor, but unlike the thyristor which is only able to conduct in one direction, the TRIAC is a bidirectional device.

Type: BT137F

Note: ZX-7149 is isotab - mounting tab is not connected to pins.

Product Specifications

• Is it an SCR or a triac : Triac
• SCR voltage max : 600V
• SCR IE : 8mA
• SCR VF : 1.65V
• SCR IG (uA) : 25µA
• SCR VG (V) : 1.5V
• SCR hold In : 20mA