双向可控硅(TRIAC, TRI-ELECTRODE AC SWITCH)为三极交流开关，亦称为双向晶闸管或双向可控硅。 TRIAC为三端元件，其三端分别为T1 (第二端子或第二阳极)，T 2(第一端子或第一阳极)和G(控制极)亦为一闸极控制开关，与SCR最大的不同点在于TRIAC无论于正向或反向电压时皆可导通。
| 型号 | 品牌 | IT(RMS)_Max /A | ITSM_Max @ f = 50Hz/A | VDRM_Min/V | IGT_I_Max/mA | IGT_II_Max/mA | IGT_III_Max/mA | TJ_Max /°C | 封装 |
|---|---|---|---|---|---|---|---|---|---|
| JST134H-600D | JJM | 4 | 25 | 600 | 5 | 5 | 5 | 125 | TO-251 |
| JST134H-600E | JJM | 4 | 25 | 600 | 10 | 10 | 10 | 125 | TO-251 |
| JST134H-600T | JJM | 4 | 25 | 600 | 5 | 5 | 5 | 125 | TO-251 |
| JST134H-800D | JJM | 4 | 25 | 800 | 5 | 5 | 5 | 125 | TO-251 |
| JST134H-800E | JJM | 4 | 25 | 800 | 10 | 10 | 10 | 125 | TO-251 |
| JST134H-800T | JJM | 4 | 25 | 800 | 5 | 5 | 5 | 125 | TO-251 |
| JST134K-600D | JJM | 4 | 25 | 600 | 5 | 5 | 5 | 125 | TO-252 |
| JST134K-600DS | JJM | 4 | 25 | 600 | 5 | 5 | 5 | 125 | TO-252 |
| JST134K-600E | JJM | 4 | 25 | 600 | 10 | 10 | 10 | 125 | TO-252 |
| JST134K-600T | JJM | 4 | 25 | 600 | 5 | 5 | 5 | 125 | TO-252 |
| JST134K-800D | JJM | 4 | 25 | 800 | 5 | 5 | 5 | 125 | TO-252 |
| JST134K-800E | JJM | 4 | 25 | 800 | 10 | 10 | 10 | 125 | TO-252 |
| JST134K-800T | JJM | 4 | 25 | 800 | 5 | 5 | 5 | 125 | TO-252 |
| JST134Q-600D | JJM | 4 | 25 | 600 | 5 | 5 | 5 | 125 | TO-126 |
| JST134Q-600E | JJM | 4 | 25 | 600 | 10 | 10 | 10 | 125 | TO-126 |
| JST134Q-600T | JJM | 4 | 25 | 600 | 5 | 5 | 5 | 125 | TO-126 |
| JST134Q-800D | JJM | 4 | 25 | 800 | 5 | 5 | 5 | 125 | TO-126 |
| JST134Q-800E | JJM | 4 | 25 | 800 | 10 | 10 | 10 | 125 | TO-126 |
| JST134Q-800T | JJM | 4 | 25 | 800 | 5 | 5 | 5 | 125 | TO-126 |
| JST134QP-600D | JJM | 4 | 25 | 600 | 5 | 5 | 5 | 125 | SOT-82 |