SMBJ140A

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TVS - Diodes

Transient voltage suppressor (TVS) diodes, also called voltage surge suppressors, are a type of voltage-sensing device that provides instantaneous over-voltage protection to electrical components and systems. They are a very important component in protecting electronic systems from the increasingly common problem of transients and surges generated through power supply and induction disturbances. The SMBJ140A is a very popular transient voltage suppressor diode used to protect from a wide range of potential overvoltage problems.

Application Field and Working Principle: The SMBJ140A is one of the most popular TVS diode in the market, designed to protect sensitive electronic equipment from transients. It provides diode protection from over-voltage transients in power supplies, data and signal lines, automotive systems, and other systems where transient protection is required. It is designed to protect from power surges and other electric inductive loads, and can handle peak pulses up to 30 A (at 8/20 μs waveform). The working principle is relatively simple; when the voltage level in the TVS diode exceeds the peak pulse voltage rating, it is triggered, and will begin to conduct current away from the protected device, thereby providing protection.

For the SMBJ140A, the peak surge current is 14 A with an 8/20 μs waveform. The standoff voltage of the TVS diode is 138V and the peak pulse power is 2000W. The Clamping Voltage (Vcl) is between 175V and 215V. It has low capacitance of 5 pF typical and fast response time of 5 ns typical. It also has a wide operating temperature range, from -55℃ to +150℃.

The SMBJ140A is an important component for protecting electrical systems from transients, and is used in a variety of applications, such as voltage supplies, automotive systems, data and signal lines, and so on. It features fast response time, high surge current capacity, and low capacitance. It is a great solution for a wide range of applications, and is an effective protection from the increasingly common problem of surges and transients.

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