S2B-E3/5BT

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Diodes - Rectifiers - Single cover the basic, single diode rectifier circuits. The single diode rectifier converts alternating current, AC, voltage to direct current, DC. One of the most common diodes is the S2B-E3/5BT and here we will look at the applications and working principle of this popular component.

The Applications and Benefits of the S2B-E3/5BT Diode

The S2B-E3/5BT is an excellent choice for AC to DC conversion and is used in a variety of applications such as power supplies, battery chargers, and voltage regulators. It is typically used in the single or multiple low-power rectifier applications.

The main benefits of the S2B-E3/5BT include a low forward voltage drop (Vf) of 0.60 volts and a maximum repetitive reverse voltage (VRRM) of 200 volts. Additionally, the diode heat sink or cooling fins allow it to handle high currents with lesser power dissipation than other rectifier diodes. The diode is available with a variety of packages and lead types.

The Working Principle of the S2B-E3/5BT Diode

The S2B-E3/5BT operates by blocking current flow in one direction (reverse) and allowing it to flow in the other direction (forward). When a voltage is applied in the forward direction (anode to cathode), the diode will allow current to flow, while in the reverse direction it acts as an insulator and current will not flow. This voltage-dependent behavior is known as rectification.

In the forward direction, the S2B-E3/5BT has a low forward voltage drop. This is due to the depletion region created by positive charge carriers (holes) and negative ones (electrons). When the voltage is higher than the depletion region width, current can flow and allow the blocking of the reverse direction.

In the reverse direction, the diode departs from its normal voltage-current characteristics. This is known as the breakdown region and this occurs when the diode is exposed to reverse voltages beyond its peak inverse voltage or PIV. When this occurs, the diode fails or its current path is destroyed

Conclusion

The S2B-E3/5BT is a popular rectifier diode and is used for the conversion of AC to DC voltages. Its benefits include a low forward voltage drop of 0.60 volts, maximum repetitive reverse voltage of 200 volts, and cooling fins. The diode works using the principle of rectification in the forward direction, and acts as an insulator in the reverse direction. When the reverse voltage exceeds the peak inverse voltage (PIV), the diode fails.

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