1, the main application of the triode is amplification, while the SCR is generally used as a switch;
2, the triode voltage is lower, the SCR is higher;
3, the SCR has a bi-directional, while the triode can only be applied to unidirectional;
4, Thyristor in the case of the source pressure has been maintained after the road system will also have been kept on state, triode is not;
The two in the replacement of the conditions are more demanding, must pay attention to the voltage, current, the role in the line (can only be the role of the switch); and triode has a half-conducting state, and the thyristor does not have, both sides have their own advantages and disadvantages.
Triode
Triode, full name should be semiconductor transistor, also known as bipolar transistor, crystal transistor, is a semiconductor device to control the current - its role is to amplify weak signals into a larger amplitude value of the electrical signals, but also used as a non-contact switch. Crystalline transistor, is one of the basic semiconductor components, with the role of current amplification, is the core component of electronic circuits. Triode is a semiconductor substrate on the production of two very close to each other PN junction, the two PN junction of the semiconductor is divided into three parts, the middle part of the base area, the two sides of the part of the emitting area and the collector area, the arrangement of the PNP and NPN two kinds.
Three: silicon controlled
SiC, short for silicon controlled rectifier, is a four-layer structure with three PN junctions of high-power semiconductor devices, also known as thyristors. With small size, relatively simple structure, strong function and other characteristics, is one of the more commonly used semiconductor devices. The device is widely used in a variety of electronic equipment and electronic products, mostly used for controllable rectifier, inverter, frequency conversion, voltage regulation, non-contact switch. Household appliances in the dimming light, speed fan, air conditioning, television, refrigerator, washing machine, camera, combined audio, sound and light circuit, timing controller, toy devices, radio remote control, video cameras and industrial control are a large number of SCR devices.