SB390-T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Diode Type:	Schottky
Voltage - DC Reverse (Vr) (Max):	90V
Current - Average Rectified (Io):	3A
Voltage - Forward (Vf) (Max) @ If:	790mV @ 3A
Speed:	Fast Recovery = 200mA (Io)
Current - Reverse Leakage @ Vr:	500µA @ 90V
Capacitance @ Vr, F:	--
Mounting Type:	Through Hole
Package / Case:	DO-201AD, Axial
Supplier Device Package:	DO-201AD
Operating Temperature - Junction:	-65°C ~ 150°C

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Diodes - Rectifiers - Single

The SB390-T is a Single Diode Rectifier designed for universal power supply applications. It is a high power device with an average forward current rating of 50A, a peak forward current of 75A, and a reverse voltage of up to 250V. The SB390-T is commonly used in applications requiring a bridge rectifier with low forward voltage for efficient power transfer.

Unipolar Functionality

The SB390-T is a unipolar diode, meaning it undergoes conduction with a single polarity of applied voltage. This means that when the diode is forward biased (apply voltage in the direction of the arrow on the device), it passes current and acts like a low resistance path for charges. The reverse biased side of the diode (voltage applied in the opposite direction of the arrow) is completely blocked and no current flows.

Reverse Protection

The SB390-T provides a great level of reverse protection in power supplies and other applications. The diode can withstand a reverse voltage up to 250V, which can help in protecting against voltage spikes and shorts. The low forward voltage also helps in efficient transfer of power in applications that require it.

Applications

The SB390-T is well suited for a variety of power supply applications, such as auto-switching power supplies and adapters, voltage regulators, and energy saving systems. Its high current rating and low forward voltage make it useful for a wide range of applications.Some other common applications include: * DC Motor Drives * LCD Monitor Power Transformers * Uninterruptible Power Supply (UPS) Systems * Battery Chargers * Power Supplies for Home Appliances

Working Principle

The working principle of the SB390-T is relatively simple. As mentioned, when a forward bias is applied to the device, it behaves like a low resistance path and passes current. The reverse biased side of the diode is completely blocked, which prevents any back-flow of current. This allows the diode to serve as an efficient means of power transfer.In DC circuits, the SB390-T is often used to bridge the voltage gap between a rectified signal and a signal that needs an exact level of DC power. The SB390-T can also be used to help reduce the amount of power wasted by circuit switching in applications that require heavy loads, such as auto-switching power supplies.In AC circuits, the SB390-T is often used to provide protection from any voltage spikes that may occur. The diode can help reduce the severity of a short, as well as help in regulating the voltage.

Conclusion

The SB390-T is a commonly used diode rectifier that can provide a great deal of protection and power efficiency. Its ability to handle large current and voltage load, as well as its low forward voltage, make it an ideal choice for a variety of power supply and related applications. The working principle is relatively straightforward, making it a useful and reliable component in a number of applications.

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