Way thyristor trigger characteristic test for larger power SCR turn-on voltage drop due to a larger holding current difficult to maintain, causing poor conduction state, you should at the SCR anode (A) on A dry cells connected in series, a test thyristor C106M 3 (b) the circuit of Fig, in order to avoid false positives. For high-power SCR should be on the circuit of Figure 3 (b) of the previous section and then string batteries, so test the effect is obvious. Generally in the following way thyristor 10A test with Figure 3 (a) coupling circuit shown; 10A with an SCR 100A Figure 3 (b) connecting the circuit shown, more than one-way controlled test 100A Silicon should figure 3 (b) on a string and then dry. On the basis of the test on the way thyristor, thyristor SCR for other types, according to their basic structure, can also be used to test basic multimeter its volt-ampere characteristics of the thyristor (2) Forward characteristic when the control electrode open, with a positive voltage on the anode, J1, J3 junction is forward biased, but the reverse biased junction J2 SCR 2P4M, which is the reverse characteristics similar to ordinary PN junction, only a small current flows, called forward blocking state when the voltage increases, the occurrence of the bending characteristics, such as the characteristics of OA segment shown bend is called UBO: forward breakover voltage thyristor BTA140, SCR, are fertile electrons from Dongguan City is fertile 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!