C49C20X2

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Thyristors - SCRs fall into a major category of semiconductors called “controlled rectifiers” which are able to perform rectification and regulate currents and voltages. There are several different types of SCRS which have specific application fields and working principles.

The C49C20X2 SCR is a medium power, voltage-controlled thyristor with a 3-terminal structure comprised of an anode, cathode and gate, which makes it gated thyristor with direct control. This type of SCR is formed from a single piece of silicon and has an on-state voltage of up to 600 volts, and an off-state leakage current of up to 0.1mA. It is built with a T0-220 (Thru-Hole) package type and dimensions of 4.3 x 4.3 x 10.3 mm.

The application field of this SCR is mainly automotive electronics, consumer electronics, telecommunications and home electronics.Its mainly used in HVAC applications such as air conditioning, refrigerators and heat pumps. It can also be used in white goods and consumer audio/video applications such as televisions and hi-fi systems. Furthermore, it can be used as anti-surge protection in lighting systems and energy saving systems.

The working principle of the C49C20X2 SCR involves three basic steps. First, a voltage is applied between the anode and cathode terminals. This voltage is known as the “holding voltage” and it must exceed the device\'s “going-on” voltage for the SCR to turn on. If the holding voltage is applied, the device will be in its “on-state” with a low forward voltage drop. Second, a trigger is applied to the gate terminal of the SCR, which then allows the current to pass through the load connected between the anode and cathode terminals. Third, when the forward current through the SCR reaches a prescribed level, the device automatically returns to its “off-state”, stopping any further current to flow.

In summary, the C49C20X2 SCR is a medium power, voltage-controlled thyristor which is used primarily in automotive and consumer electronics applications. Its main features include a 3-terminal structure, an on-state voltage of up to 600 volts and an off-state leakage current of up to 0.1 mA. Its application field and working principle involves a holding voltage applied between the anode and cathode terminal, a trigger applied to the gate terminal and then a current passing through the load connected between the anode and cathode terminal until the forward current drops to a prescribed level, at which point the device returns to its “off-state”.

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