Letter symbols used for THYRISTORS:
| VDRM | Repetitive peak off-state voltage | V |
| VRRM | Repetitive peak reverse voltage | V |
| ITAV | Mean on-state current | A |
| ITRMS | RMS on-state current | A |
| ITSM | Surge on-state current | kA |
| Tj | Operating junction temperature | oC |
| Tstg | Storage temperature | oC |
| Tc | Case temperature | oC |
| VTM | Peak on-state voltage, max | V |
| IDRM | Repetitive peak off-state current, max | mA |
| IRRM | Repetitive peak reverse current, max | mA |
| VGT | Gate trigger direct voltage, max | V |
| IGT | Gate trigger direct current, max | A |
| VT(T0) | On-state threshold voltage | V |
| (diT/dt)crit | Critical rate of rise of on-state current | A/ms |
| (dvD/dt)crit | Critical rate of rise of off-state voltage, min | V/ms |
| tq | Turn-off time | ms |
| rT | On-state slope resistance, max | mW |
| F | Mounting force | kN |
| M | Tightening force | Nm |
| Rthjc | Thermal resistance junction to case, max | oC/W |