gaizhuangzhideyingyongdianlurutusuoshi。zaijingtiguandianshijizhong，xingshuchuhezhenshuchuguandoujieyoujiaodadedianganxianquan，zaikaiguandianshijideshunjian，xianquanliangduanhuichanshengshunjianguodianya
，weilequebaojingtiguandeanquangongzuo，kezaisanjiguanVT的c-e極之間接上一隻壓敏電阻MY。壓敏電壓的選取應高於工作電壓，又要低於晶體管BG的耐壓BVCEO或BVCER值。