TMOV34S421M

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TVS (Transient Voltage Suppressor) devices are electronic components used to eliminate transients in electrical and electronic equipment. Varistors and MOVs (Metal Oxide Varistors) are two types of TVS devices. The TMOV34S421M is a 1500W peak pulse power transient voltage suppressor, which provides high performance protection against over-current, AC and DC surge transients, and radio frequency interference.

The TMOV34S421M is a surface-mount packaged metal oxide varistor with encapsulated excess leakage silicon oxide insulation and a zinc oxide varistor element. It has an ultra-low profile and is designed for automotive and high-reliability applications. The device is RoHS compliant and comes with a lead-free finish.

The TMOV34S421M has wide operating voltage range, high pulse current capability, low ESR (equivalent series resistance) and low thermal impedance. The device offers excellent over-voltage protection and very fast response time. Its wide operating temperature range (–55°C to +125°C) makes it suitable for a variety of automotive and aerospace applications.

The TMOV34S421M also features a UL 94V-0 flammability rating and it is compatible with automated surface-mounting assembly. The device\'s unique design and packaging make it effective in protecting against low-speed power cross transients.

The working principle of the TMOV34S421M is based on the Zinc Oxide varistor. The device consists of Zinc Oxide grains, which form a non-linear variable resistor. The device is triggered by the voltage difference between the device and the external load. When over-voltage is applied, the device will conduct a low level of current to reduce the voltage and protect the load. The device is able to suppress transient voltage by providing a low impedance path to ground.

The TMOV34S421M is especially suitable for automotive and aerospace applications due to its high temperature and high voltage tolerance. It is also employed in telecom and industrial applications, especially in those that require reliable and high-performance protection against overvoltage and transients. The device is also widely used in over-voltage protection circuits and in critical high-speed AC/DC power electronics, such as power supplies, AC/DC converters, automotive systems, and medical electronics.

In conclusion, the TMOV34S421M is a versatile and reliable component that provides excellent protection from transient voltage due to its wide working voltage range, high pulse current capability, and low ESR. Its inherently low profile design makes it suitable for power density applications and its RoHS compliant nature makes it an ideal solution for automotive and high-reliability applications.

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