| Model Name | TOWSP-B60 | TOWSP-C40 | TOWSP-D20 |
| Protection Class | B | C | D |
| Pole No. | 1P, 2P, 3P, 4P | ||
| Max.Continuous Operating Voltage (Uc): | 275V | ||
| Nominal Discharge Current (8/20s) (In) | 30kA | 20kA | 10kA |
| Max. Discharge Current (8/20s) (Imax.) | 60kA | 40kA | 20kA |
| Voltage protective level | ~1.5KV | ~1.3KV | ~1.0KV |
| Response Time | < 25ns | ||
| Working Environment | Temperature -40C +80C | ||
| Relative humidity<95% | |||
| Material of Outer Shell | Flame retardant materials | ||