Bidhaa hii hutumika kulinda overload na short circuit katika lightlumination circuit na bidhaa hizo zinafuata viwango vya GB10963 na BS3871.
| Mkondo uliokadiriwa|A) | Idadi ya nguzo | Volti iliyokadiriwa | Uwezo wa kuvunja |
| 6.10.15.20.30.40.50.60 | 1 | 120120/240 | 50005000 |
| 15.20.30.40 | 2 | 240/415120/240 | 30005000 |
| 50.60 | 3 | 240/415240/415 | 30003000 |