RV271K07T

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TVS/varistors (Transient Voltage Suppressors) and MOVs (Metal Oxide Varistors), have become a common form of electronic protection within electrical and electronic systems. From power lines to everyday consumer electronics, they protect valuable components from voltage induced damages. This article will discuss the application field and working principle of the RV271K07T.

The RV271K07T is a Transient Voltage Suppressor (TVS) manufactured by STMicroelectronics that offers protection from transient voltage events. The device consists of two bidirectional Thyristors and a pair of Zener diodes. This configuration allows the device to provide a transient voltage protection that clamps the voltage and limits its peak amplitude to a defined value. The device is designed to operate with an operating voltage range of 7 to 57 Volts and a maximum sustained clamping voltage of 132 Volts. It is also capable of handling high-level surge currents up to 20A (1 microsecond).

This TVS is primarily used in automotive systems such as vehicle diagnostic systems, fuel rails, injectors, airbag control units, and infotainment systems. It is also used in medical equipment, home appliances, IT equipment, and communications equipment. It features an IP6K9K protection rating, which ensures dust and water ingress protection to further enhance system reliability. This device is also rated for tungsten inert gas (TIG) welding applications.

In operation, the device filters out spurious voltages and limits the peak amplitude of transient voltage inputs. The two bidirectional Thyristors act as switches for clamping the voltage. When voltage transient events occur, the Thyristors are triggered to conduct current through the Zener diode, and a passage is created for the current to flow. This passage clamps the transients at the Zener voltage level. Once the transient decreases, the Zener diode is opened and the Thyristor switches off.

The RV271K07T also provides electrostatic discharge protection. It features a wide breakdown voltage range of 6 to 30V and an operating capacitance of less than 100pF, allowing it to protect the system from ESD events. It also has an operating temperature range of -40 to 125°C, which ensures reliable operation in a wide variety of environmental conditions.

The RV271K07T is a reliable and cost-effective solution for protecting circuits and components from transient voltage events and electrostatic discharge. It is well-suited for use in the automotive and medical sectors, as well as a wide range of consumer electronics. Its highly reliable construction and wide operating range makes it a viable alternative to competing devices.

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