D251N20BXPSA1

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Diode Type:	Standard
Voltage - DC Reverse (Vr) (Max):	2000V
Current - Average Rectified (Io):	255A
Speed:	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr:	30mA @ 2000V
Capacitance @ Vr, F:	--
Mounting Type:	Stud Mount
Package / Case:	DO-205AA, DO-8, Stud
Supplier Device Package:	--
Operating Temperature - Junction:	-40°C ~ 180°C

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Introduction

The D251N20BXPSA1 is a rectifier diode from STMicroelectonics. It is a single diode in a TO-247 package with an Rth(j-c) of 5.0 K/W. This diode offers a low Vf (forward voltage drop) of 1.25V, low drive current (IF) of 1A, and fast switching time. It is suitable for switching applications, such as AC/DC converters and general rectification. The D251N20BXPSA1 has a PIV (peak inverse voltage) rating of 200V and a VRRM (repetitive peak reverse voltage) rating of 175V with a reverse current of 10uA at a maximum temperature of 150°C.

Application Field

The D251N20BXPSA1 rectifier diode is a reliable and efficient option for various power applications. Its low forward voltage drop and fast switching time make it an ideal choice for AC/DC converters, inverters, and general rectification applications. As its power dissipation is higher than other TO-247 diodes, this diode is especially suitable for applications that require a higher power dissipation limit. For example, motor control, high power UPS systems, server power supplies, and level converters.

Working Principle

Rectifier diodes are used to convert alternating current (AC) into direct current (DC) by allowing current in one direction and blocking current in the other. This is done by using a single diode, such as the D251N20BXPSA1, which is connected in series with an AC signal source. When the signal polarity is positive, the diode allows current to flow, and when the signal polarity is negative, the diode blocks current flow. This action is known as “rectification” since it “rectifies” or converts the AC signal into a DC signal. When current flows through a diode, a voltage drop occurs across the diode junction due to the increase in resistance of the diode. As such, the D251N20BXPSA1 has a low forward voltage drop of 1.25V, which means that a lower voltage drop is seen across the diode junction when current passes through it. The D251N20BXPSA1 has an Rth(j-c) rating of 5.0 K/W, which means that it can dissipate up to 5.0 kW of power without becoming too hot. The diode also has a low drive current (IF) of 1A and a fast switching time, which makes it an ideal choice for power applications that need a fast response and high efficiency.

Conclusion

The D251N20BXPSA1 rectifier diode from STMicroelectonics is a reliable and efficient single diode for various power applications. Its low Vf (forward voltage drop) and fast switching time make it an ideal choice for AC/DC converters, inverters, and general rectification applications. Its high power dissipation rating also makes it a great option for high power applications such as motor control, high power UPS systems, server power supplies, and level converters.

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