S2016R

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The Thyristors - SCRs (or Silicon Controlled Rectifiers) are very important in electrical applications and equipment, given their key function as a controllable switch. The S2016R SCRs have seen wide application in home and industrial design. This article will discuss the technology behind these devices, as well as their operation, application and working principles.

The most common SCR used in electronics is the SCR or Silicon Controlled Rectifier, which is basically a semiconductor device, consisting of four alternating P and N type layers, and has three terminals (anode, gate and cathode). The three terminals are used to represent the application, operation and working principles of SCRs. For S2016R SCRs, the anode, cathode and gate all have a current carrying capacity of up to 4A. The gate terminal is used for triggering the SCR, enabling it to be switched on or off.

One of the primary applications of SCRs, the S2016R SCRs, is in industrial and home applications. As a controllable switch, it finds application in rectifier circuits, AC motor drives, lamp starters, heaters and industrial motor speed controllers. In home appliance they are used to control motor speed, as well as automated air conditioning systems and dryers.

In terms of operation, an SCR combines the properties of a standard diode with a gate controlled switch. If a forward voltage is applied to the gate, it will trigger the SCR. When a forward gate current reaches a certain threshold, the gate current will increase exponentially leading to SCR onset. This is known as the gate turn-on point, and is a key factor for efficiently utilising SCRs.

The current carrying capacity of the S2016R SCR is usually limited to around 4A and they have a voltage carrying capacity of up to 400V. For the S2016R SCRs, the turn-on time and current is dependent on the gate current selected and the gate resistance. The maximum rated reverse blocking voltage is 400V.

One of the primary disadvantages of SCRs is the very high leakage current associated with them. This is due to the presence of minority carriers in the SCR structure. As a consequence, SCRs may be susceptible to false triggering.To prevent false triggering, the S2016R SCRs come with a special gate processing that limits the gate current. There is also a integrated PTC (or polymeric positive temperature coefficient) on the gate terminal that increases the resistance to gate current, providing a self-protection mechanism against excessive current flowing into the SCR.

The working principle of the S2016R SCRs is very simple. In a application, if the voltage across the anode and cathode is greater than the forward breakover voltage, then a forward-biased current passes through the SCR. This current causes the SCR to become forward biased, when it turns on and current flows between the anode and cathode. The PTC resists gate current when an excessive gate current is applied and disables the SCR.

In conclusion, the S2016R SCR is a widely used device in both home and industrial applications. Its ability to control power with high current and voltage makes it an ideal choice for electricity delivery and battery charging applications. With its integrated protection against false triggering, it guarantees a high level of security and reliability. The basic working principle of an SCR is easy to understand, and can be explained in a few simple steps. Its ability to handle high currents and voltages, combined with its safety features, makes it a great choice for many applications.

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