它是在外加电压作用下可以产生高频振荡的晶体管。产生高频振荡的工作原理是栾的：利用雪崩击穿对晶体注入载流子，因载流子渡越晶片需要一定的时间，所以其电流滞后于电压，出现延迟时间，若适当地控制渡越时间，那么，在电流和电压关系上就会出现负阻效应，从而产生高频振荡。它常被应用于微波领域的振荡电路中。
| 型号 | 品牌 | 功能描述 |
|---|---|---|
| TFD312S | Sanken electric | |
| STA401A | Sanken electric | |
| STA406 | Sanken electric | |
| STA406A | Sanken electric | |
| STA413 | Sanken electric | |
| STA413A | Sanken electric | |
| STA471A | Sanken electric | |
| STA475A | Sanken electric | |
| STA481 | Sanken electric | |
| STA481A | Sanken electric | |
| STA485 | Sanken electric | |
| STA485A | Sanken electric | |
| STA301A | Sanken electric | |
| STA371A | Sanken electric | |
| STA435A | Sanken electric | |
| SDC04 | Sanken electric | |
| DSA35 | IXYS[IXYS Corporation] | |
| DSA35-12A | IXYS[IXYS Corporation] | |
| DSA35-16A | IXYS[IXYS Corporation] | |
| DSA35-18A | IXYS[IXYS Corporation] | |
| SDC03 | Sanken electric | |
| SLA4010 | Sanken electric | |
| DSAI17-12A | ETC[ETC] | |
| DSAI17-16A | ETC[ETC] | |
| DSAI17-18A | ETC[ETC] | |
| BAX12 | Philips Semiconductors | |
| R2KS | discrete Semiconductors | |
| DSA17-16A | ETC[ETC] | |
| SKA1 | ||
| NDL5531P | ||
| NDL5531P1C | ||
| NDL5531P1D | ||
| NDL5531P2C | ||
| NDL5531P2D | ||
| NDL5531PC | ||
| NDL5531PD | ||
| S330D | Vishay | |
| SP0503BAHT | ||
| SP0503BA | Littelfuse | |
| STA435 | Sanken electric | |
| IXFH26N50P | IXYS Corporation | |
| IXFH26N60P | IXYS Corporation | |
| DSAI35-12A | IXYS Corporation | |
| DSAI35-16A | IXYS Corporation | |
| STA460C | Sanken electric | |
| SP0518CAA | Littelfuse | |
| SKNA2 | Semikron International | |
| SKNA213 | Semikron International | |
| R2KY | Semiconductor | |
| R2K | ||
| SKNA20 | Semikron International | |
| SKNA20236 | Semikron International | |
| SKNA20240 | Semikron International | |
| SKNA20242 | Semikron International | |
| SKNA20245 | Semikron International | |
| SKNA20246 | Semikron International | |
| SKNA20248 | Semikron International | |
| SKNA20250 | Semikron International | |
| SKNA2236 | Semikron International | |
| SKNA2240 | Semikron International | |
| SKNA2242 | Semikron International | |
| SKNA2245 | Semikron International | |
| SKNA2246 | Semikron International | |
| SKNA2248 | Semikron International | |
| SKNA2250 | Semikron International | |
| SKNA40236 | Semikron International | |
| SKNA40240 | Semikron International | |
| SKNA40242 | Semikron International | |
| SKNA40245 | Semikron International | |
| SKNA40246 | Semikron International | |
| SKNA40248 | Semikron International | |
| SKNA40250 | Semikron International | |
| BY26805 | Vishay Siliconix | |
| GPDN2148 | Green Power Solutions | |
| GPDN4087 | Green Power Solutions | |
| GPDN3113 | Green | |
| GPDN3127 | Green | |
| GPDN4100 | Green | |
| GPDP2319 | Green | |
| AARS25L | GROUP |