SMF90A-TP Circuit Protection

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The SMF90A-TP is a unidirectional Transient Voltage Suppression Diode designed to protect sensitive electronic components from the high-frequency, high energy spikes known as electrical transients. This diode limits the voltage that can be applied to a circuit component to a safe, predetermined maximum level. It is most often used to protect sensitive circuit boards from possible damage due to electrical overstress due to the unanticipated, sporadic surge voltage.

The diode works by clipping the leading edges of unwanted voltage spike from the positive or negative side. It also absorbs a portion of the applied energy by virtue of the shunt resistor internal to the device. The SMF90A-TP series are constructed with a patented GaN-based active gate and drain structure. This allows them to react quickly to changing input voltage and prevent against any potential damage.

This diode is able to operate up to a peak of 90A and is ideal for applications requiring the protection of sensitive components such as opto-couplers, DC-DC converters, and medical equipment from sudden, unchecked voltage high-frequency transients. The device is specifically designed to be compliant with Domestic and International safety standards, such as UL, CSA, NEMA, and CE.

The SMF90A-TP is constructed with gold plated wire bonds and is available in a number of packaging configurations to meet different application requirements. Its wide temperature range with the junction temperature up to +175°C ensures it can handle applications with varying input voltages.

When installing the diode it is important to observe the marking at the front end. This will help determine the polarity and proper way to install the device. The device should be installed such that the anode (marked with an “A”) is installed closest to the load. A print material should also be installed down-stream the diode to further protect equipment from the damaging surge voltage.

In addition to the physical installation of the component, a proper grounding method should be used to ensure the safety of the circuit. A proper grounded conductor should be used to provide a reliable and dependable surge protection. In applications, where a high amount of surge current is anticipated, it is important to install the SMF90A-TP device in conjunction with a transient voltage surge suppressor.

In conclusion, the SMF90A-TP is a type of transient voltage suppression diode designed to protect electronic components from transient voltage spikes. It works by clipping the leading edge of the voltage spike and by absorbing part of the energy from the shunt resistor. Additionally, its wide temperature range and its ability to operate at a peak of 90A make it suitable for a variety of applications, such as those in the medical and opto-coupler fields. Proper installation and grounding should also be taken into account when using this diode.

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