B72650M0301K072 Circuit Protection

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TVS─Varistors, MOVs

B72650M0301K072 is an electronic component used to protect electronic circuits from voltage transients caused by electrostatic discharge (ESD), electrical fast transients (EFT), ping-pong, and lightning. It is a type of Transient Voltage Suppressors (TVS) and falls under the category of varistors and metal oxide varistors (MOV).

Application Field

B72650M0301K072 finds usage in various applications in consumer electronics and industrial controls. Devices such as Mobile phones, Palmtop computers, and digital cameras use TVS in order to be shielded from lightning, electrostatic and electrical fast transients (EFT). It can also be in surge suppressors used in industrial and construction applications, protecting sensitive equipment from indirect lightning strikes. Additionally, it is also used to protect various components/circuits from transient voltages in automotive electronics. B72650M0301K072 is available in many models and form factors, such as SMD/SMT, SIP axial lead, Radial Leaded, and Axial Leaded.

Working Principle

The working principle TVSs, such as B72650M0301K072, is based on a breakdown voltage effect, commonly referred to as the avalanche effect. It breaks down and begins to conduct if a momentary or continuous voltage above its rated breakdown voltage is applied across its terminals. When this excess voltage is applied, the increased electric field causes free electrons to accelerate, creating electron avalanches which greater increases the current. This reduces the voltage by providing a flow path to the ground. With ever increasing current, the electron-hole pair generation rate increases, forming a conduction area which further provide a path for more current and reducing the voltage to a safe and pre-defined value.

The working parameters of B72650M0301K072, like most other TVSs are dependent on the specific requirements of the circuit being protected. A common factor among all these TVSs is that the switching threshold, also known as the breakdown voltage, is typically lower than 5 V, and the clamping voltage is around 10 V.

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