SR809 A0G

Series:	--
Packaging:	Tape & Box (TB)
Part Status:	Active
Diode Type:	Schottky
Voltage - DC Reverse (Vr) (Max):	90V
Current - Average Rectified (Io):	8A
Voltage - Forward (Vf) (Max) @ If:	920mV @ 8A
Speed:	Fast Recovery = 200mA (Io)
Current - Reverse Leakage @ Vr:	100µA @ 90V
Capacitance @ Vr, F:	--
Mounting Type:	Through Hole
Package / Case:	DO-201AD, Axial
Supplier Device Package:	DO-201AD
Operating Temperature - Junction:	-55°C ~ 150°C

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Diodes - Rectifiers - Single

The SR809 A0G is a single-phase rectifier diode designed to provide high efficiency and current-foldback features to improve the reliability of AC/DC power conversion systems. This single-phase rectifier diode is best suited for rectifying from low to mid-power switch mode power supplies and other waveform devices.The SR809 A0G has a unique feature of a built-in current-foldback feature that can be enabled or disabled via an external pin. This feature enables the diode to reduce its junction voltage at higher currents to protect the power device from overstressing.The SR809 A0G has a typical reverse bias blocking voltage of 800V and can work in up to 85°C ambient temperatures. The forward voltage is low and the online loss is negligible, making it an ideal choice for low-burden diode applications. The reverse current leakage is low and the power dissipation is decreased.The SR809 A0G is mainly utilized in AC/DC switchmode power supplies, high power inverters, frequency converters and other similar applications. It is also suitable for rectifying low power DC/DC converters and UPS systems.Working PrincipleThe principle of operation of SR809 A0G is quite simple. It consists of two junctions - anode and cathode. When a voltage is applied to the anode, the electrons flow through it. This flow of electrons is limited to a single direction, as the cathode junction\'s p-n junction blocks current flow in the opposite direction. This behaves as a rectifier and enables the diode to act as a rectifier in AC/DC power applications.The SR809 A0G implements a current-foldback feature. This feature reduces the junction voltage at higher currents and helps in protecting the power device from overstressing. During an overcurrent situation, the current-foldback feature reduces the junction voltage, thereby reducing the stress on the power device. This helps in increasing overall system reliability.Conclusion The SR809 A0G is a single-phase rectifier diode that is well suited for power conversion applications ranging from low to mid-power switch mode power supplies. It also has a built-in current-foldback feature that helps protect the power device from overstressing. The forward voltage is low and the reverse current leakage is low, making it an ideal choice for low burden diode applications. The SR809 A0G is mainly utilized in AC/DC switchmode power supplies, high power inverters, frequency converters, low power DC/DC converters and UPS systems.

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