SM30T30AY

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Transient voltage suppression (TVS) diodes is a type of specialty diodes designed for ultra-fast response time. TVS diodes play an important role in protecting electronic circuits from overvoltage transients. Such events typically result from switching operations in a power line, inductive load switching, lightning, etc. The SM30T30AY is a three-terminal Transient Voltage Suppressor (TVS) device designed to protect voltage sensitive components from high-energy voltage transients. The series provides rated peak pulse current of 30A, peak pulse power of 1500W and stand-off voltage of 30V.

The SM30T30AY is designed with a single chip MOSFET technology that makes it excel in terms of its ultra-low leakage current and high ESD immunity. This makes the device suitable for many application fields including automotive, consumer electronics, industrial, and telecom. In addition, the SM30T30AY features a low on-state impedance, wide operating temperature range, and reverse breakdown voltage range of 10 to 90V. Therefore, the device is capable of providing bi-directional protection and allows for use in a wide variety of applications.

The working principle of the SM30T30AY relies on the avalanche effect. Under normal operating conditions, the reverse breakdown voltage of the diode will keep the device in a low-impedance OFF state. But if the voltage across the device exceeds the breakdown voltage, the electron current will be increased dramatically, resulting in the device entering a high-impedance ON state. This type of protection can prevent voltage transients from permanently damaging the circuit, as the device will limit current flowing through the circuit and protect it from the applied overvoltage. In order to ensure a quick response, the avalanche breakdown process in TVS diodes must be completed within a few nanoseconds. This is different from other transient suppression devices, such as zener diodes, that rely on electro-thermal effects and require many microseconds to respond.

The SM30T30AY is an excellent device for protecting sensitive electronics in applications that require high levels of transient protection. The device\'s low capacitance ensures that the circuit response time is high, while the low on-state resistance allows for a low voltage drop. The device can also be used as a clamp to protect negative voltage transients, as it is capable of withstanding reverse voltages up to 90V. The device also includes several layers of protection, including an inversely conducting SCR for increased current capability, and an intentional crowbar circuit for high clamp current. These features make the SM30T30AY an ideal choice for applications where both high-speed and high-current protection is required.

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