This post explains for the triac.
Part Number: BT136
Package: TO-220C, TO-220HF Package
Manufacturer: JILIN SINO-MICROELECTRONICS ( www.hwdz.com.cn )
Glass passivated triacs in a plastic envelope, intended for use in applications requiring high bidirectional transient and blocking voltage capability and high thermal cycling performance. Typical applications include motor control, industrial and domestic lighting, heating and static switching.
1. AC switching
2. Phase control
1. Planar chip for reliability and uniform
2. Low on-state voltage and High ITSM
3. RoHS products