Triac Schematics - naming 1, TRIAC: three side: TRIode (take the first three letters); AC semiconductor switch: ACsemiconductor switch (taking the first two letters). Combinations of the above two terms as "TRIAC", Chinese translation meaning "triac switch." Thus "TRIAC" is triac collectively. 2, BCR: bi: Bi-directional (take the first letter); control: Controlled (take the first letter); rectifier: Rectifier (take the first letter). Then a combination of these three groups of the first letter from the English noun: "BCR", Chinese translation meaning "triac." To "BCR" to name a typical triac manufacturers such as Japan's Mitsubishi, such as: BCR1AM-12, BCR8KM, BCR08AM more. 3, BT: bi: Bi-directional (take the first letter); three-terminal: Triode (take the first letter). A combination of more than two words to "BT", but also on the product model name triac SCR BTA216, typical of manufacturers such as: STMicroelectronics ST companies, Philips -Philips company, are a way to name the two-way SCR. Representative models such as: PHILIPS's BT131-600D, BT134-600E, BT136-600E, BT138-600E, BT139-600E, etc., these are four quadrants / non-insulated / triac. Unidirectional way SCR SCR, using a pointer table of R × 1 gear SCR BTA140, first find out the pros and cons to not pass two feet, remaining that must be controlled very feet. Move the pointer multimeter red pen and black ink, respectively, then the two unreasonable level SCR BTA412Y, then the control electrode connected with shorted black pen, the pointer will show the number of a certain angle of rotation, then turn control pole from black pens, pointers if you keep trying to show the number does not move, the black pen then the anode, red pen then the cathode. SCR BTA208 | SCR | are fertile Electronics Dongguan City is provided by Wal-Electronic Technology Co., Ltd. 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! You can also access (www.dgmydz.com/supply_details_44239305.html), for more information about the company.