Triac - Detection DIP4 pin type ZC TRIAC optocouplers indicating that SCR BT134W-600E, if measured a foot and other feet do not pass, it certainly is extremely T2. Also SCR, TO-220 package using triac, T2 pole normally communicates with a small cooling plate, thus also determine the triac T2 pole - Detection DIP4-pin type ZC triac Optocouplers for pole with a negative trigger signal G, the resistance value should be around ten in Europe, proof tube has turned SCR BT137S-600E, conduction direction T1 a T2. Then the red tip and G pole disengaged (but still connected to T2), if the resistance value remains unchanged, proof tube after the trigger to maintain the conduction state. SCR BT134W-600E | SCR | n Wal Electronics Dongguan City is provided by Wal-Electronic Technology Co., Dongguan City is Wo Electronic Technology Co., Ltd (www.dgmydz.com) (www.dgmydz.com) strong, credible, FET and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead positive fertile electronic and you hand into the brilliant, for a better future!