BZW04-40B B0G

Voltage - Clamping (Max) @ Ipp:	64.8V
Supplier Device Package:	DO-204AL (DO-41)
Package / Case:	DO-204AL, DO-41, Axial
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	400W
Current - Peak Pulse (10/1000µs):	6.2A
Series:	BZW04
Voltage - Breakdown (Min):	44.7V
Voltage - Reverse Standoff (Typ):	40.2V
Bidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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TVS - Diodes, BZW04-40B B0G Application Field and Working Principle TVS - Diodes are semiconductor devices that are used to protect against electrical transients. They are also known as transient voltage suppressor diodes, voltage clamping diodes, transient voltage suppressors (TVS), or Transil diodes. They come in many shapes and sizes, depending on the application. The TVS - Diodes, BZW04-40B B0G, is a compact, surface mountable, bidirectional TVS Diode that provides protection against electrostatic discharge (ESD). The BZW04-40B B0G is an ultra-low power unidirectional device, meaning that it can be used for both over-voltage and electrostatic discharge protection for a wide variety of consumer, industrial, and automotive applications. It is comprised of a pair of semiconductor p-n junctions separated by an oxide layer and is typically used to protect low-voltage circuits from electrostatic precipitation. When electrostatic precipitation occurs, the diode will become forward biased, allowing charge to pass from the anode to the cathode. This charges the junction in series with the diode, causing the electrolyte to flow across the diode and allowing current to pass. During this process, the voltage across the junction is kept constant, thus preventing further electrostatic charge from flashing across the junction. The BZW04-40B B0G operates when it is reverse biased, clamping the voltage across the junction to a maximum value. The device also has a high holding voltage, allowing it to safely conduct large static pulses through the cathode to the anode and eventually to ground. This effect is especially beneficial in automotive applications, where the ESD is often caused by a sudden surge of air entering the vehicle cabin, which can create large static charges. The holding voltage of the device also makes it suitable for rugged industrial applications, where the device will be exposed to harsh electrical transients. In addition to providing ESD protection, the BZW04-40B B0G is also suitable for over-voltage protection. As the device is connected in series with the load, it will adjust the applied voltage across the load to a safe level, while maintaining a safe voltage differential across the junction. This not only prevents damage to the load from overvoltage, but also prevents damage to the diode itself by dissipating the excess energy. Because of its ability to provide both ESD and overvoltage protection, the BZW04-40B B0G is often used in many industries, including consumer electronics, automotive, industrial, and medical applications. As it is a surface mountable, bidirectional device, it is also suitable for use in smaller form factors, such as mobile phone and PDA designs. In conclusion, the BZW04-40B B0G is a compact, bidirectional TVS Diode that provides protection from electrostatic discharge and over-voltage transients. It is suitable for many applications, including consumer electronics, automotive, industrial, and medical. As it is compact and surface mountable, it is also suitable for smaller form factors.

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