Fig. 1. Structure of circuit and devices

Fig. 2. I-V characteristics of DTSCR

Fig. 3. Transient signals of voltage and current

Fig. 4. Variation of the peak temperature of the device with time

Fig. 5. Internal temperature distribution of the device under negative pulse

Fig. 6. Device of SCR1

Fig. 7. Change of peak temperature inside the device

Fig. 8. Damage amplitude threshold varying with pulse width