SA18ARL

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Transient Voltage Suppressor (TVS) diodes are a special class of protection devices that are designed to help provide protection for sensitive electronic components from transient over-voltage events such as ESD, power surges, and inductive switching.

SA18ARL is a unidirectional fast-recovery TVS diode with a protector element on its anode. It is suitable for a variety of applications for ESD protection, voltage clamping, and voltage transients over voltage protection, such as Smartphones, Notebooks, LCD TV, Power Supplies, DC-DC converters, Amplifiers, etc.

The working principle of the SA18ARL TVS diode is based on the principle of a zener diode. It operates by controlling the voltage across its anode and cathode. When there is a transient voltage surge or ESD occurs above the breakdown voltage, the extra current path is opened and the energy is dissipated across the diode as heat energy. The excess voltage is then suppressed.

The SA18ARL is implemented with a protector element on the anode which can reduce the clamping voltage and the anode-to-cathode capacitance increases the transient response of the diode. The protector element also helps to reduce the leakage current and increase the thermal resistance to reduce the diode self-heating.

The SA18ARL is available in small-sized SOT143 or SOT323 packages and features a low maximum operating capacitance at 1.2pF, high peak surge current of 420A, and an ultra-fast clamping voltage rating of 18V. It is RoHS Compliant and has an electrically-isolated junction for higher reliability and fire safety.

In conclusion, SA18ARL is a unidirectional fast-recovery TVS diode with protector element on its anode. It is suitable for a variety of applications such as ESD protection, voltage clamping, and voltage transients over voltage protection. It features low maximum operating capacitance, high peak surge current, and an ultra-fast clamping voltage rating. The protector element helps to reduce the leakage current and increase the thermal resistance to reduce the diode self-heating. It is available in small-sized packages and is RoHS Compliant.

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