S2008FS21

Thyristors are an important range of semiconductor components that are used in a variety of applications. A Thyristor is an electrical device that consists of four layers of semiconducting materials and is used to control the flow of current. The term “Thyristor” is derived from the Greek word “Thyristor” which means “non-linear current control”. The most commonly used type of Thyristors is the SCR (Silicon Controlled Rectifier). It is a three-terminal device composed of a silicon wafer, a gate electrode and an anode or cathode electrode.

The S2008FS21 is a Thyristor SCR that is primarily used in the control and switching of AC loads. It is a robust and reliable device that is available in a variety of sizes and configurations. It has an on-state voltage rating of 800 V, a current rating of 21 A, and can withstand off-state voltages up to 1000 V. The S2008FS21 also features a current latching capability with a firing pulse that can be applied to the gate. It is available in through-hole and surface mount packages, making it suitable for a wide range of applications.

The working principle of the S2008FS21 is based on the phenomenon of the avalanche breakdown. A small reverse bias voltage is applied to the anode-gate junction and, when this voltage exceeds a certain threshold value, a current flows through the device. This current causes a large voltage drop across the four layers of silicon and an avalanche breakdown occurs. Once the device has been turned on, the anode-gate junction becomes less sensitive to the reverse bias voltage, allowing it to remain in an “on” state.

Due to its robustness and reliable operation, the S2008FS21 is suitable for a wide range of applications. It is commonly used in AC motor and lighting control systems, such as street lighting, safety lighting, and industrial lighting. The device can also be used in process controllers and power regulators, as well as heating and cooling systems and inmedical equipment such as Anesthesia machines and Ultrasound machines.

The S2008FS21 is a versatile device that can be used in just about any application where an AC load needs to be controlled or switched. Its on-state voltage rating, current rating, and current latching capability make it ideal for use in a wide range of environments. It is a reliable and robust component that is well-suited for many applications.