The SM712.TCT ,from Semtech Corporation, is a 400W Zener diodes, package in a SOT-23-3 and SMD (SMT) package. It is designed for transient overvoltage protection, targeting General Purpose applicaition. It is rated over a -55°C to 125°C (TJ) temperature range. The rate stand-off voltage for the SM712.TCT is 12V (Max), 7V (Max) volts. The minimum breakdown voltage is given for 13.3V, 7.5V. It can support the clamping voltage and peak pulse current of up to 26V, 12V and 17A (8/20μs) , respectively.