The Eti-Polam ETITEC SM T12 300/25 4+0 lightning protection switch provides T1+T2 (B+C) type protection suitable for electrical installations. Its main features include:
- Surge arrester type: T1+T2 (B+C)
- Arrangement: 4+0
- Maximum impulse current: 25 kA
- Number of poles: 4
- Technology: Varistor + spark gap
- System: TN-S
- Manufacturer: ETI
- Code: 002440572