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 |
|---|---|---|---|---|---|---|---|---|---|
| ACJT210-8V | JJM | 2 | 25 | 800 | 10 | 10 | 10 | 125 | SOT-223 |
| ACJT210-8W | JJM | 2 | 25 | 800 | 10 | 10 | 10 | 125 | SOT-223-2L |
| ACJT405-10A | JJM | 4 | 40 | 1000 | 5 | 5 | 5 | 125 | TO-220A |
| ACJT405-10C | JJM | 4 | 40 | 1000 | 5 | 5 | 5 | 125 | TO-220C |
| ACJT405-10F | JJM | 4 | 40 | 1000 | 5 | 5 | 5 | 125 | TO-220F |
| ACJT405-10H | JJM | 4 | 40 | 1000 | 5 | 5 | 5 | 125 | TO-251 |
| ACJT405-10K | JJM | 4 | 40 | 1000 | 5 | 5 | 5 | 125 | TO-252 |
| ACJT405-8A | JJM | 4 | 40 | 800 | 5 | 5 | 5 | 125 | TO-220A |
| ACJT405-8C | JJM | 4 | 40 | 800 | 5 | 5 | 5 | 125 | TO-220C |
| ACJT405-8F | JJM | 4 | 40 | 800 | 5 | 5 | 5 | 125 | TO-220F |
| ACJT405-8H | JJM | 4 | 40 | 800 | 5 | 5 | 5 | 125 | TO-251 |
| ACJT405-8K | JJM | 4 | 40 | 800 | 5 | 5 | 5 | 125 | TO-252 |
| ACJT410-10A | JJM | 4 | 40 | 1000 | 10 | 10 | 10 | 125 | TO-220A |
| ACJT410-10C | JJM | 4 | 40 | 1000 | 10 | 10 | 10 | 125 | TO-220C |
| ACJT410-10F | JJM | 4 | 40 | 1000 | 10 | 10 | 10 | 125 | TO-220F |
| ACJT410-10H | JJM | 4 | 40 | 1000 | 10 | 10 | 10 | 125 | TO-251 |
| ACJT410-10K | JJM | 4 | 40 | 1000 | 10 | 10 | 10 | 125 | TO-252 |
| ACJT410-8A | JJM | 4 | 40 | 800 | 10 | 10 | 10 | 125 | TO-220A |
| ACJT410-8C | JJM | 4 | 40 | 800 | 10 | 10 | 10 | 125 | TO-220C |
| ACJT410-8F | JJM | 4 | 40 | 800 | 10 | 10 | 10 | 125 | TO-220F |