SMP13A-M3/85A Circuit Protection

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TVS- Diodes are known as Transil diodes and are used as the go-to solution for transient voltage protection. TVS diodes come in many shapes and sizes, and their most popular types include unidirectional, bidirectional, Thyristor Surge Suppressors (TIS), Transzorb and Zener diodes. This article focuses on the popular SMP13A-M3/85A TVS diode and explores its application fields and working principle.

The SMP13A-M3/85A TVS diodes are unidirectional diodes, which means they only allow current to flow in one direction. These diodes are specifically designed to be used on differential data lines to protect high speed data lines as well as computer networks, high speed logic circuits, SerDes BUS, CANBUS wiring, and turbine pressure sensors. It is also suitable for use in consumer electronics, such as touchscreens, tablets, portable gaming consoles, and any other device whose internal circuitry is sensitive to any form of voltage over-voltage induced by wiring hazards, as well as common mode noise and electrostatic discharges.

The SMP13A-M3/85A diode is specifically engineered with a maximum peak pulse power rating of 8.5 Amps and a breakdown voltage of 16VOLT. It operates at a very low leakage current of 8nA and has a fast response time for transients and over-voltage protection of less than 10 nanoseconds. This makes it ideal for situations where current pulses may happen and where fast response times are essential to ensure optimal safety. The thermal resistance of the diode is at an optimal value of 45.C/W which ensures a low temperature rise when the device is operated at its rated current, and it is also resistant to electrostatic discharges up to 2KV.

The SMP13A-M3/85A TVS diode works based on a simple principle called the avalanche breakdown. This happens when the applied voltage across a junction breaks down due to the presence of a high electric field. The electric field created by the excess battery voltage causes it to become so strong that it generates sufficient charge carriers, leading to a current flow through the junction. This phenomenon is known as Avalanche Breakdown and it is used to protect sensitive electrical components from transient over-voltages.

This Avalanche Breakdown phenomenon is what makes the SMP13A-M3/85A TVS diode a very effective and reliable device for protecting sensitive electronics. The diode acts like an electrical switch and it will clamp any over-voltage in just a few nanoseconds, thus preventing it from damaging the protected electronics. The SMP13A-M3/85A diode is also compatible with various PCBs and the package size makes it easy to mount the device on a board.

The SMP13A-M3/85A TVS diode is both reliable and efficient. It is an excellent choice for protecting all sorts of sensitive electronics from any kind of over-voltage or transient surges. Its fast response time and low leakage current make it one of the most popular diode solutions for transient voltage protection.

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