Triac - Product identification 1, single, triac discrimination: first as two measuring pole, if positive and negative test pointer not moving (R × 1 block), may be A, K or G, A pole (unidirectional SCR) may be T2, T1 or T2, G pole (for triac). Triac - product identification and then swap the two pen SCR BT137S-600E, repeat the above steps measured once SCR T435-800T, pointer even slightly larger than the last time more than a dozen to a few European SCR, SCR indicates good, and the trigger voltage (or current) is small. If you remain on A pole or pole disconnect G T2 pole position pointer immediately return ∞, then the SCR trigger current is too large or damaged SCR T405-800T, SCR, are fertile electrons from Dongguan City is Wal-Electronic Technology Limited. Dongguan City is Wal-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 the electronics are fertile and you hand into the brilliant, for a better future!