US1BFA Discrete Semiconductor Products

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Diode Type:	Standard
Voltage - DC Reverse (Vr) (Max):	100V
Current - Average Rectified (Io):	1A
Voltage - Forward (Vf) (Max) @ If:	950mV @ 1A
Speed:	Fast Recovery = 200mA (Io)
Reverse Recovery Time (trr):	50ns
Current - Reverse Leakage @ Vr:	5µA @ 100V
Capacitance @ Vr, F:	20pF @ 4V, 1MHz
Mounting Type:	Surface Mount
Package / Case:	SOD-123W
Supplier Device Package:	SOD-123FA
Operating Temperature - Junction:	-55°C ~ 150°C

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US1BFA Diodes - Rectifiers - Single

The US1BFA is a type of single rectifier diode designed for power management applications in which very low forward voltage drop is extremely important. Due to their low forward voltage drop, these single rectifier diodes are commonly used in adjustable power supplies.A single rectifier diode is a semiconductor device made of two layers of doped silicon, or “P” and “N”, in which the P-type (positive) layer has an excess of positive charge carriers and the N-type (negative) layer has an excess of negative charge carriers. In this device, only one direction of current can flow and therefore, it acts as a one-way switch. This feature is known as rectification and is the reason why rectifier diodes are used in electrical systems.The US1BFA single rectifier diode offers a unique combination of features that makes it a desirable choice for many power management applications. Its low forward voltage drop of 0.13V at 10A provides improved efficiency and power savings. Additionally, its low capacitance of 0.5pF prevents it from interfering with the frequency response of an amplifier, and its low reverse leakage current of 1uA ensures optimal performance when the diode is not conducting.The US1BFA single rectifier diode has a distinct operating principle, which can be divided into two different stages. During the 1st stage, known as the forward conduction, the diode passes the current in the forward direction due to an internal electric field which is responsible for the low voltage drop. The magnitude of the forward current is thus dictated by the voltage that the user provides at the terminals. During the 2nd stage, known as reverse breakdown, the diode passes the current in the reversed direction when the voltage across its terminals exceeds the reverse breakdown voltage (VBR) of the device. This higher voltage typically occurs during a fault condition, such as a power surge, so the reverse breakdown of the diode helps to protect the system from any external disturbances.In conclusion, the US1BFA single rectifier diode is a reliable and efficient component for power management applications. Thanks to its low forward voltage drop, low capacitance and low reverse leakage current, it is ideal for adjustable power supplies. Furthermore, its two-stage operation principle, consisting of the forward conduction and reverse breakdown, ensures reliable performance under a wide range of operating conditions.

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