公司名称：常州鼎先电子有限公司（电路保护）

通信设备防雷保护：低电容，低电压防雷保护：半导体防雷管，固体放电管：
P系列过电压保护器,该类器件适用于模拟和ISDN线卡以及PABX系统、主分配机构等。广泛应用于通讯系统一、二级的防雷电保护. P75-8是一种低电压双向浪涌保护器,保护电压8V,浪涌值75A.主要应用在音视频传输线，XDSL,T1/E1数字电话和类似应用而设计的一级保护产品等较为敏感的传输设备。
半导体放电管系列规格：
SMB(DO214-AA)
P0080SA、P0220SA、P0300SA、P0640SA、P0720SA、P0900SA、P1100SA、P1300SA、P1500SA、P1800SA、P2100SA、P2300SA、P2600SA、P3100SA、P3500SA
P0080SB、P0220SB、P0300SB、P0640SB、P0720SB、P0900SB、P1100SB、P1300SB、P1500SB、P1800SB、P2100SB、P2300SB、P2600SB、P3100SB、P3500SB
P0080SC、P0220SC、P0300SC、P0640SC、P0720SC、P0900SC、P1100SC、P1300SC、P1500SC、P1800SC、P2100SC、P2300SC、P2600SC、P3100SC、P3500SC

TO-92
P0080EA、P0220EA、P0300EA、P0640EA、P0720EA、P0900EA、P1100EA、P1300EA、P1500EA、P1800EA、P2100EA、P2300EA、P2600EA、P3100EA、P3500EA
P0080EB、P0220EB、P0300EB、P0640EB、P0720EB、P0900EB、P1100EB、P1300EB、P1500EB、P1800EB、P2100EB、P2300EB、P2600EB、P3100EB、P3500EB
P0080EC、P0220EC、P0300EC、P0640EC、P0720EC、P0900EC、P1100EC、P1300EC、P1500EC、P1800EC、P2100EC、P2300EC、P2600EC、P3100EC、P3500EC

DO-15
P0080LA、P0220LA、P0300LA、P0640LA、P0720LA、P0900LA、P1100LA、P1300LA、P1500LA、P1800LA、P2100LA、P2300LA、P2600LA、P3100LA、P3500LA
P0080LB、P0220LB、P0300LB、P0640LB、P0720LB、P0900LB、P1100LB、P1300LB、P1500LB、P1800LB、P2100LB、P2300LB、P2600LB、P3100LB、P3500LB
P0080LC、P0220LC、P0300LC、P0640LC、P0720LC、P0900LC、P1100LC、P1300LC、P1500LC、P1800LC、P2100LC、P2300LC、P2600LC、P3100LC、P3500LC