TPSMA18AHE3/5AT

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TVS - Diodes is a type of component which provide surge protection and electrostatic noise protection. The TPSMA18AHE3/5AT is a fast acting three-terminal MOSFET based Bi-Directional TVS (Transient Voltage Suppressor) Diode specifically designed to protect systems against voltage transients induced by electrostatic discharge (ESD) events. The device is qualified to the IEC61000-4-2 Level 4 ESD specifications.

Application field

The TPSMA18AHE3/5AT is designed to provide bi-directional transient surge protection for systems that experience transients due to electrostatic discharge (ESD), electrical fast transients (EFT), and lightning. It’s use in medium current applications where fast switching times (<1 ns) are required. Examples of electronics circuits which can experience transient events due to ESD, EFT, and lightning are Automotive, Computer, Telecommunications, Data Acquisition, Industrial, Audio/Video, Appliances, Laboratory Equipment, Instrumentation, Portable Electronics, and High-End consumer products like tablets and cell phones.

Working principle

The working principle for the TPSMA18AHE3/5AT is based on a fast acting active MOSFET-FET (Metal Oxide Semiconductor Field Effect Transistor). The device has a breakdown voltage of 18 volts, providing a low forward voltage drop and fast clamping. The device is bi-directional, and can handle transients such as electrostatic discharge (ESD), EFT (electrical fast transients from lightning strikes), and cold switing. The device also has a lower reverse leakage current than conventional diode suppressors.

The TPSMA18AHE3/5AT has a low clamping voltage of 9.4V ± 10%. It has a low stand-off voltage of 6V and can be used for miniaturized designs due to the small form factor. In addition, the device has multiple protection features such as overvoltage protection, reverse current protection, and low capacitance which keep the device operating reliably over numerous transient conditions.

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