KBU8G Discrete Semiconductor Products

Series:	--
Packaging:	Bulk
Part Status:	Active
Diode Type:	Single Phase
Technology:	Standard
Voltage - Peak Reverse (Max):	400V
Current - Average Rectified (Io):	8A
Voltage - Forward (Vf) (Max) @ If:	1V @ 8A
Current - Reverse Leakage @ Vr:	10µA @ 400V
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	4-SIP, KBU
Supplier Device Package:	KBU

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KBU8G Application Field and Working Principle

Diodes-Bridge Rectifiers, commonly referred to as KBU8G, are a type of diode bridge rectifier with a compact, rectangular structure suitable for SMD mounting. KBU8G rectifiers are designed to change AC current to DC current in electronic applications, and are particularly suitable for switching power supplies.

General Features

KBU8G rectifiers are comprised of four diodes in a bridge rectifier configuration and are available in wave soldered (BVMT / BVMU) and surface mount (BKMR / BKMU) packages. The surface mount versions have device dimensions of 4.7 mm x 6.1 mm x 10.5 mm, and wave soldered versions have device dimensions of 8.7 mm x 8.7 mm x 10.2 mm. KBU8G rectifiers can handle non-repetitive peak forward surge current up to 50A, and it is recommended that they are operated with a limit of 36A. They offer a blocking voltage of 800V, and a forward voltage drop of 1.2V at 25A of current.

Notable Applications

KBU8G rectifiers are used in a wide variety of power circuits, including power supplies, UPS systems, and inverters. They are also used in motor control circuits, as well as electromechanical and transformer welding applications. Furthermore, these rectifiers are found in automotive, consumer electronics and renewable energy applications such as solar and wind.

Working Principle

KBU8G rectifiers use a bridge configuration, wherein four diodes are arranged in a bridge configuration on a circuit board with the diodes forming four branches of the bridge. When power is applied, the diodes act as resistors, and current flows through the circuit board. When the current exceeds the current capacity of the circuit board, the diodes conduct current, becoming reverse biased and blocking the flow of current through the other branches of the bridge. This causes the current to flow through only two of the four branches of the bridge and effectively operates as a rectifier, changing the AC current to DC current.

Advantages

KBU8G rectifiers offer several benefits over alternative bridge rectifiers. Unlike traditional bridge rectifiers, they are highly compact and can be easily integrated into the SMD assembly process. They also feature a low forward voltage drop and a high surge current capability. Additionally, they operate with wide temperature range of -55℃ to +150℃, making them suitable for applications that require operating in extreme temperatures.

Conclusion

KBU8G rectifiers are highly reliable and efficient devices designed for use in electronic applications. They offer many advantages and are suitable for a variety of applications, including power supplies, UPS systems, and inverters. Additionally, their small size and low power loss make them well suited for energy-efficient applications, such as motor control circuits, electromechanical and transformer welding, and solar and wind energy applications.

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Part Number	Manufacturer	Price	Quantity	Description