=====  Circuit Protection  =====

==== Manufacturers ====
| https://www.belfuse.com/  |         |  | |
| https://www.bourns.com |         |  | |
| https://www.hakel.ru/ | Разные УЗИП | | |
| https://www.igur.by/ |  Разные УЗИП | | |


==== Thermistors ====
[[.Thermistors:start|Термисторы]]

==== Varistors ====
[[.Varistors:start|Варисторы]]

==== Fuses ====
[[.Fuses:start|Предохранители]]

==== Surge Arresters ====
[[.surge_arrester:start|Разрядники]]

  * DIAC {{diac.png?100}}
  * SIDAC {{sidac.png}}

  * TSPD (thyristor surge protection device) (crowbar device)
    * ST (Trisil)
    * TOOHONG
    * Bourns (TISP)
    * Littelfuse (SIDACtor)
  * transient voltage suppression diodes
    * Transil


Trisil is a trade name for a thyristor surge protection device, an electronic component designed to protect electronic circuits from overvoltage. Unlike a transient voltage suppression diodes, such as Transil, Trisil acts as a crowbar device, switching on when the voltage across it exceeds its breakover voltage.