| Parameter | Symbol | KBL406 | unit |
| Maximum repetitive peak reverse voltage | VRRM | 600 | V |
| Maximum RMS bridge input voltage | VRMS | 420 | V |
| Maximum DC blocking voltage | VDC | 600 | V |
| Maximum average forward rectified output current at TA=50 C | IF(AV) | 4.0 | A |
| Peak forward surge current single sine-wave superimposed on rated load (JEDEC Method) | IFSM | 200 | A |
| Rating for fusing ( t<8.3ms) | I 2 t | 166 | A2sec |
| Typical thermal resistance per element (1) | ReJA | 10.0 | °C/W |
| Operating junction and storage temperature range | TJ, TSTG | -55 to + 150 | °C |