BZW04-48B

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TVS-Diodes are semiconductor components that protect electrical circuits against overvoltage and overcurrent conditions. The BZW04-48B is a type of TVS diode specifically designed for protecting against an overvoltage condition. The BZW04-48B is capable of blocking a voltage of up to 48V and is typically used on circuits located in areas with potential high transients caused by lightning strikes or ESD. The BZW04-48B is often used in outdoor lighting applications as well as communication systems and signal protection and instrumentation components.

The working principle of the BZW04-48B is based on a Zener diode. A Zener diode is a type of diode capable of conducting current in either direction when the voltage across it is higher than its ‘knee’ voltage. A typical Zener diode has a knee voltage of 5V. The BZW04-48B has a knee voltage of 48V, which is why it is specified for overvoltage protection on circuits with a high voltage transients. When the voltage across the BZW04-48B exceeds its knee voltage, it will conduct current and reduce the voltage across the protected circuit to a safe level.

In addition to the Zener diode, the BZW04-48B also includes an extra special feature not present in regular Zener diodes. This is a built-in thermal fuse which can detect any temperature increases inside the BZW04-48B and cut off the current flow if the temperature exceeds a certain threshold. This thermal fuse ensures that the BZW04-48B can protect the circuits from overvoltage as well as overheating.

The BZW04-48B is a reliable solution for protecting circuits from overvoltage and overcurrent conditions. Its high knee voltage, combined with the thermal fuse, make it an ideal choice for outdoor lighting applications and other circuits with potential high transient voltages.

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