BT136-600E is a 600V 4A very sensitive gate Triac in a TO-220AB plastic package intended for use in general purpose bidirectional switching and phase control applications..
BT136-600D is a 600V 4A very sensitive gate Triac in a TO-220AB plastic package intended for use in general purpose bidirectional switching and phase control applications..
BT139-600E is Planar passivated sensitive gate four quadrant triac in a T0-220AB plastic package intended for use in general purpose bidirectional switching and phase control applications. This sensitive gate "series E" triac is intended to be interfaced directly to microcontrollers, logic integrated circuits and other low power gate trigger circuits..