SMBJ350E3/TR13

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TVS (Transient Voltage Suppressors) diodes are an important part of power distribution equipment, protecting against transient overvoltage conditions caused by electrostatic discharge (ESD) or lightning surges. They provide efficient protection against such events by clamping the voltage at a safe level, thus preventing costly damages in sensitive systems. SMBJ350E3/TR13 is a special type of TVS diode which finds wide application in fields like computers, consumer electronics, automotive electronics, home appliances and many others. It is a unidirectional (non-bidirectional) component, meaning that it can only protect from overvoltages coming from one polarity.

The SMBJ350E3/TR13 has an operating voltage range been 5.5V and 220V, with a VBR (voltage limiting breakdown) of 350 volts, and an Ipp (peak pulse current) of 50 Amps. The diode is typically used in applications demanding overvoltage protection across the range of 5.5V up to 350V. Traditional protection diode technologies such as Bipolar and ZENER are found to be inefficient for this range, making the SMBJ350E3/TR13 a superior choice for such applications.

The SMBJ350E3/TR13 is designed to provide effective clamping and transient suppression across a wide operating temperature of -55℃ to +150℃. The device is also characterized with a surge capability of 400 W per pulse for 10/1000 µs. It benefits from a fast response time, starting to conduct current at the beginning of the surge. The component has a low dynamic resistance and its minimal capacitance of just 15 pF provides superior noise filtering up to GHz frequencies. The device also features a low clamping voltage (Vcl) of less than 1V at its rated current.

In terms of construction, the SMBJ350E3/TR13 is a dual components package with both leads solderable and insulated by a high reliability material. The surface of the device is designed to be clean and flat without any burrs, allowing for automated solder connections up to 10 mm distance. It also requires a very low mounting height of 0.8 mm and a quick thermal response to further improve its energy absorption characteristics.

The working principle of the SMBJ350E3/TR13 is straightforward. It begins with an overvoltage event occurring in the protected circuit, which causes a large amount of current to be conducted through the diode. By limiting the voltage at a safe level, it prevents the surge current from damaging other components within the system. As the voltage is clamped down, the energy dissipation within the diode starts to increase, with the current gradually decreasing until the value can no longer be detected.

In summary, the SMBJ350E3/TR13 is a highly efficient TVS diode whose operating voltage ranges from 5.5 V up to 350 V. This component is ideal for a range of applications requiring overvoltage protection, from computers and consumer electronics to automotive and home appliances. It offers robust protection by clamping the voltage at a safe level in the event of a transient overvoltage, while its low capacitance and dynamic resistance provides superior noise filtering. The SMBJ350E3/TR13 is a reliable component offering excellent surge handling and quick thermal response.

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