3KP28-B

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TVS (Transient Voltage Suppressor) diode is a device which can protect downstream components from voltage transients. The protection can be provided for one line (uni-directional) or two lines (bi-directional). 3KP28-B is a P5KE series bidirectional TVS diode manufactured by Littelfuse. This device is designed to protect sensitive electronic equipment from a broad range of destructive transient voltage events.

3KP28-B is an ultrafast, unidirectional 300W, 5V bidirectional TVS diode, with a maximum peak pulse current of 28A. The device has a compact leadless (SMT) package that allows easy mounting and a low storage temperature of -55°C. The device is also RoHS compliant, has high peak pulse power capability and a fast clamping response.

The main application area of the 3KP28-B device is in automotive electronics, where it is used to protect external and internal circuits from damaging transients. These transients can arise due to various phenomena such as electro-static discharges (ESD), switching heavy loads, grounds loops, inductive load switching, and power supply transients. The 3KP28-B is suitable for a broad range of applications such as power converters, infotainment systems, airbag systems, and automotive body control systems. It can also be used in industrial, medical, consumer electronics, and other electronic systems to provide transient protection.

The working principle of the 3KP28-B is based on its two main components – the semiconductor and its control element. The semiconductor portion of the device acts as a voltage-blocking element. In the forward bias condition, it allows only very small current to flow through the device, and in the reverse bias condition, it completely blocks the current flow. The control element of the device is a PN diode which helps in maintaining a reverse bias voltage of 5V on the device and ensures that the device activates in the presence of any transient voltage or current.

The 3KP28-B TVS diode provides a quick and reliable means to protect sensitive electronics from destructive transients. The device is available in an ultra-small footprint with very low reverse leakage current, and has a wide operating temperature range of -55°C to +125°C. The low capacitance and the fast clamping response of the device make it ideal for various applications in the automotive and other industries.

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