Introduction to thyristors and triacs and ten golden rules for successful application
The document explains the operation principles of thyristors (SCRs) and bidirectional thyristors, describing their triggering, conduction, and turn‑off behavior. It also defines the key parameters (Ver, Icr, LI) and presents characteristic curves.
Design guidelines cover temperature limits, gate sensitivity, protection against noise, and recommended circuit topologies. Detailed mounting methods, thermal‑resistance calculations, and package‑specific data are provided to ensure reliable integration of these devices. This manual is written in Chinese.
| Ver, Icr, LI (at 25 °C) | values given at 25 °C |
|---|---|
| Maximum current for SOT54 (TO92) thyristor | 0.8 A |
| Maximum current for SOT78 (TO220AB) thyristor | 25 A |
| Smallest component package | SOT223 (surface‑mount) |
| Typical thermal resistance for SOT82 package | 100 K·W⁻¹ |
| Typical thermal resistance for SOT78 package | 6 K·W⁻¹ |
Approximately 6 K·W⁻¹.