MMT05B230T3, MMT05B260T3, MMT05B310T3 Preferred Devices Thyristor Surge Protectors High Voltage Bidirectional TSPD http://onsemi.com These Thyristor Surge Protective devices (TSPD) prevent overvoltage damage to sensitive circuits by lightning, induction and power line crossings.
They are breakover triggered crowbar protectors.
Turn off occurs when the surge current falls below the holding current value.
Secondary protection applications for electronic telecom equipment at custo