Bourns TISP40xxH1BJ VLV Overvoltage Protectors

Bourns TISP40xxH1BJ Very Low Voltage (VLV) Overvoltage Protectors are designed to control overvoltages on digital telecommunication lines and consist of a symmetrical voltage-triggered bidirectional thyristor. Overvoltages are initially stopped by breakdown clamping until the voltage rises to the breakover level, which triggers the device to crowbar into a low-voltage on-state condition. This low-voltage on-state allows the current resulting from the overvoltage to be safely diverted through the device. The device switches off when the diverted current drops below the holding current value.


  • Low capacitance
  • Controls overvoltages on digital telecommunication lines
  • ±5μA repetitive peak off-state current (IDRM)
  • ±0.8A maximum breakover current (I(BO))
  • ±50mA minimum holding current (HI)
  • Package: SMB (DO-214AA)
  • Temperature ranges
    • -40°C to +150°C junction range (TJ)
    • -65°C to +150°C storage range (Tstg)


  • Digital Line Signal Level Protection
    • ISDN
    • xDSL
Published: 2016-01-21 | Updated: 2022-03-11