SMBJ120HE3/5B

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Transient Voltage Suppressors (TVS) are integrated circuits that are designed to prevent overvoltage damage to electrical devices, such as computers, by quickly responding to an overvoltage or electrostatic discharge event and then redirecting the current away from the sensitive device. The SMBJ120HE3/5B is a bi-directional TVS Diode, designed for transient voltage suppression applications.

In most applications, TVS devices are used to protect components or systems from accidental high-voltage situations, such as electrostatic discharge or overvoltage surges caused by power failure or lightning strikes. The SMBJ120HE3/5B is a unidirectional diode (also known as a symmetrical bidirectional diode) that is specifically designed for use in TVS applications, and it can also be used to protect against overvoltage situations. With a low voltage rating of 5V and a high breakdown voltage of 120V, the SMBJ120HE3/5B is well-suited to protect against a wide range of overvoltages.

SMBJ120HE3/5B Application Fields

The SMBJ120HE3/5B is a versatile diode that is suitable for a wide range of applications, ranging from computer and telecommunications equipment to industrial machinery and other electronic devices. It can be used to protect against overvoltage and transients, including power surges caused by lightning strikes, ESD, EOS, power cross and other external overvoltages. The SMBJ120HE3/5B is also suitable for protecting sensitive electronics such as communication networks, computers, and telecommunication systems.

SMBJ120HE3/5B Working Principle

When the voltage across an SMBJ120HE3/5B diode exceeds the breakdown voltage (VBR), it starts to conduct. This effectively shunts the excess voltage away from the protected components and towards the diode, allowing the protected components to remain undamaged. The SMBJ120HE3/5B also has an ultra-low clamping voltage of 5V which makes it ideal for protecting sensitive electronics, such as microcontrollers and other small electronic components.

The SMBJ120HE3/5B diode has a fast response time compared to other TVS devices. When exposed to an overvoltage or a transient, it will respond immediately and quickly redirect the current away from the vulnerable devices. This fast response time is essential for protecting valuable electronics, as any delays could cause permanent damage.

The SMBJ120HE3/5B is a versatile device that is suitable for a wide range of applications. It is available in a number of different packages for use in applications that require protection from high voltage transients, overvoltage situations, and electrostatic discharge.

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