| Model | Attachable current transformer |
| Accuracy class | 0.5 |
| Number of primary inputs | 1 |
| With copper rail | Yes |
| Primary rated current, A | 20 |
| Snap mounting | No |
| Secondary connection | Screw connection |
| Secondary rated current, A | 5 |
| Over current limiting factor | FS 5 |
| With shock protection | Yes |
| Marking | CTWW-20-0.5-5 |
| Series | YON CT |
| Primary winding current | 20 A |
| Secondary winding current | 0.20833333333333 |
| Accuracy class | 0.5 |