BAS321JF

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Diode Type:	Standard
Voltage - DC Reverse (Vr) (Max):	250V
Current - Average Rectified (Io):	250mA (DC)
Voltage - Forward (Vf) (Max) @ If:	1.25V @ 200mA
Speed:	Fast Recovery = 200mA (Io)
Reverse Recovery Time (trr):	50ns
Current - Reverse Leakage @ Vr:	100nA @ 200V
Capacitance @ Vr, F:	2pF @ 0V, 1MHz
Mounting Type:	Surface Mount
Package / Case:	SC-76, SOD-323
Supplier Device Package:	SOD-323
Operating Temperature - Junction:	150°C (Max)

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Diodes - Rectifiers - Single

The BAS321JF is a single-phase rectifier diode, commonly used in the fields of aerospace, telecommunications, medical and industrial applications. It is a general-purpose diode that is suitable for higher current and higher reverse voltages. The maximum forward current of this diode is 4A.The BAS321JF consists of an anode, a cathode, and a junction. The anode is the positive terminal and the cathode is the negative terminal. The anode and the cathode have a N+ layer and a P+ layer which between them acts as a barrier for the reverse voltage. The junction acts as the diode switch, allowing the current to flow in only one direction.When a forward current is applied, the junction allows the current to flow from the anode to the cathode and the voltage across the junction remains constant. This is known as the forward bias operation and it results in a rectified and limited current flow. The reverse bias operation involves the application of reverse voltage to the junction. In this case, the current flow is stopped, only a very small current flows, and it is limited by the barrier and the depletion layer formed between the two layers of the junction.The application of the BAS321JF diode is primarily as a rectifier for single-phase power supplies. In such use, the diode is connected in series with the power supply input, and it acts as a bridge across the two AC terminals. The frequency of the AC has to be chosen to suit the implementation, and it is usually higher than the DC frequency to ensure the highest efficiency. Another application of the BAS321JF diode is for protection against short circuits and reverse currents. In this use, the diode is connected in series between the power supply and the circuit that is being protected. It prevents the current from flowing in the wrong direction, thereby providing protection.In conclusion, the BAS321JF is a single-phase rectifier diode commonly used in a variety of applications. It has an anode and a cathode and a junction that govern the flow of current in only one direction. It is mostly used as a rectifier for single-phase AC power supplies and for protection against short circuits or reverse currents.

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