SM8S12-E3/2D

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A TVS (Transient Voltage Suppressor) is a non-volatile, self-activating solid-state device that provides an instant protection against voltage transients by short-circuiting high-voltage spikes. TVS diodes, also known as ESCO diodes, are designed to protect consumer electronic equipment from abnormal system voltages, including but not limited to electrostatic discharges (ESD), inductive voltage transients, and surge voltages. This article provides an overview of the SM8S12-E3/2D application field and working principle.

SM8S12-E3/2D Application Field

The SM8S12-E3/2D is a monolithic TVS diode specifically designed for high-performance automotive electronic applications. It comes in a small SOT-363 package with a voltage range of 40V to 57V. The device is characterized by its low leakage current (1.0μA/V@50V), fast response time (10ns typical), and low clamping voltage (3.3V).

The device offers protection against ESD, inductive voltage transients, and surge voltages. It is suitable for providing transient protection to automotive electronic devices such as power line protection, power supply lines (24V), and broad area network (BAN).

SM8S12-E3/2D Working Principle

To understand the SM8S12-E3/2D working principle, it is important to understand how TVS diodes work in general. TVS diodes are voltage-dependent, semiconductor devices that provide fast and reliable protection against overvoltage transients. Upon exceeding the device\'s breakdown voltage, a TVS diode provides an instant protection against high-voltage spikes by short-circuiting the voltage. This short-circuiting reduces the applied voltage to a safe level, thus protecting the device from any further damage.

The SM8S12-E3/2D device utilizes a high-speed avalanche breakdown by allowing a low-energy current through the diode, which is then diverted to ground via a low-voltage clamping action. Upon exceeding the device\'s breakdown voltage, the device behaves as a short circuit, thus dissipating the energy of any overvoltage transients.

The SM8S12-E3/2D device also features a low clamping voltage and fast response time, which allows it to respond quickly to overvoltage transients and clamp the voltage to a safe level. The device has a clamping voltage of 3.3V, which is ideal for protecting 24V automotive electronic applications.

Conclusion

The SM8S12-E3/2D TVS diode is specifically designed for high-performance automotive electronic applications. It is characterized by its low leakage current, fast response time, and low clamping voltage, and offers protection against ESD, inductive voltage transients, and surge voltages. The device utilizes a high-speed avalanche breakdown to provide an instant protection against overvoltage transients by short-circuiting the voltage, thus reducing it to a safe level.

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