Bourns TBU® Circuit Protection Devices

Bourns TBU® Circuit Protection Devices block transients in nanoseconds through a current-disconnecting mechanism instead of diverting or shunting the surge to ground. These high-speed surge protection components are designed to protect against faults caused by short circuits, AC power cross, induction, and lightning surges. Bourns TBU Circuit Protection Devices are resettable for full functionality after multiple fault events and ideal for telecommunications, industrial, and data communications systems.


  • Overvoltage and overcurrent protection in one device
  • Provides blocking protection for both power cross and lightning
  • High-speed performance
  • Precise output current and voltage limiting
  • Exceeds Telcordia GR-1089 and ITU K.20 / K.21 requirements
  • 3GHz bandwidth
  • Provides automatic protection coordination
  • Compact size

P850-G Dual TBU High-Speed Protectors - 850Vimp and 425Vrms, high-speed performance in a small package

P40-G TBU High-Speed Protectors - 40Vimp and 28Vrms, GHz compatible, low impedance

C650 & C850 TBU High-Speed Protectors - 650Vimp or 850Vimp, 300Vrms or 425Vrms, GHz compatible, minimal PCB area


Publicado: 2009-02-03 | Actualizado: 2023-02-27