MXLCE12AE3 Circuit Protection

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TVS - Diodes: MXLCE12AE3 Application Field and Working Principle

Transient Voltage Suppression (TVS) diodes provide protection against the damaging effect of transient voltage spikes, electrical overstress, electrical fast transients, and ElectroStatic Discharge (ESD). The MXLCE12AE3 is a TVS diode designed to offer reliable protection of sensitive electronic equipment and components from transient overvoltage events. Here we will discuss the application field and working principle of MXLCE12AE3.

Application Field

Every piece of electronic equipment is prone to voltage spikes for a variety of external sources like switching noise from motors, lightning, contact with other electrical equipments, and ESD from human-machine interaction. To be able to ensure their reliable functioning, these equipments must be protected by a reliable protection circuit and this is where MXLCE12AE3 comes in.

The MXLCE12AE3 is a unidirectional Transient Voltage Suppressor (TVS) diode that is designed to offer protection of sensitive electronic equipment and components from transient overvoltage events. This diode is mainly used for protection against electrical over-stress (EOS) and ElectroStatic Discharge (ESD) in communication and data signal line applications, as well as in battery lines and power supply lines. It offers reliable overvoltage protection in general purpose consumer and automotive electronics, electric vehicles, portable electronic devices, and many other applications. It is available in a variety of package types, including thru-hole, surface mount, and leadless packages.

MXLCE12AE3 is designed with low capacitance and an exceptionally low dynamic resistance. Its excellent capacitance enables it to reduce parasitic inductance and to draw low current, thus extending its applications to high speed data lines that require high signal quality. Its low dynamic resistance enable this diode to protect sensitive electronics from transient surge voltages.

Working Principle

The working principle of the MXLCE12AE3 is based on the fact that when a voltage spike exceeds the breakdown voltage of the diode, it breaks down and starts conducting current. This causes the excess voltage to be diverted to the ground and the electrical equipment to be protected from over-voltage. They essentially act as a short circuit that diverts the excessive current away from the sensitive electronics.

It is important to note that the MXLCE12AE3 is not a traditional diode, but rather a combination of two series-connected diodes, with each diode being reverse-biased. This means that the voltage applied to the diode will cause the reverse-biased diode to conduct current, and the forward biased diode to block current. This allows it to effectively divert the excessive current away from the sensitive electronics.

In addition, the MXLCE12AE3 also features an internal ESD sensing circuit that quickly responds to any overvoltage that surpasses its breakdown voltage. This sensing circuit quickly triggers the diode to conduct current, thus offering protection against EOS and ESD.

The MXLCE12AE3 is a versatile and reliable solution for most overvoltage protection needs. Thanks to its excellent capacitance and low dynamic resistance, this TVS diode is perfect for protecting sensitive equipment from transient voltage spikes, EOS, and ESD.

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