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 | 制造商 | 封装 | 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 |
|---|---|---|---|---|---|---|---|---|---|
| ACJT810-8H | JJM | TO-251 | 8 | 80 | 800 | 10 | 10 | 10 | 125 |
| ACJT810-8K | JJM | TO-252 | 8 | 80 | 800 | 10 | 10 | 10 | 125 |
| ACJT825-10A | JJM | TO-220A | 8 | 80 | 1000 | 25 | 25 | 25 | 125 |
| ACJT825-10C | JJM | TO-220C | 8 | 80 | 1000 | 25 | 25 | 25 | 125 |
| ACJT825-10F | JJM | TO-220F | 8 | 80 | 1000 | 25 | 25 | 25 | 125 |
| ACJT825-10H | JJM | TO-251 | 8 | 80 | 1000 | 25 | 25 | 25 | 125 |
| ACJT825-10K | JJM | TO-252 | 8 | 80 | 1000 | 25 | 25 | 25 | 125 |
| ACJT825-8A | JJM | TO-220A | 8 | 80 | 800 | 25 | 25 | 25 | 125 |
| ACJT825-8C | JJM | TO-220C | 8 | 80 | 800 | 25 | 25 | 25 | 125 |
| ACJT825-8F | JJM | TO-220F | 8 | 80 | 800 | 25 | 25 | 25 | 125 |
| ACJT825-8H | JJM | TO-251 | 8 | 80 | 800 | 25 | 25 | 25 | 125 |
| ACJT825-8K | JJM | TO-252 | 8 | 80 | 800 | 25 | 25 | 25 | 125 |
| ACJT835-8E | JJM | TO-263 | 8 | 80 | 800 | 35 | 35 | 35 | 125 |
| ACJT835-8FP | JJM | TO-220F | 8 | 100 | 800 | 35 | 35 | 35 | 125 |
| BCR20PM-16L | JJM | TO-220F | 20 | 200 | 800 | 35 | 35 | 35 | 150 |
| BT131-800D | JJM | SOT-223 | 1 | 9 | 800 | 5 | 5 | 5 | 125 |
| BT134-800D | JJM | SOT-223 | 1 | 14 | 800 | 5 | 5 | 5 | 125 |
| JPTT01U-800SW | JJM | TO-92 | 1 | 14 | 800 | 10 | 10 | 125 | |
| JPTT01V-800SW | JJM | SOT-223 | 1 | 14 | 800 | 10 | 10 | 150 | |
| JPTT01V-800SW-US | JJM | SOT-223 | 1 | 14 | 800 | 10 | 10 | 125 |