SMF13A-HM3-08

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TVS - Diodes

Transient voltage suppression (TVS) diodes, such as the SMF13A-HM3-08, are surge-protective devices designed to protect sensitive electronic components from high-voltage transients caused by lightning strikes, power supply faults, and other catastrophes. These devices contain a Zener diode along with a shunt resistor that limits the voltage supplied to the protected circuits.

Application Field

Due to their high speed, lightning-fast response time and low capacitance, TVS devices such as the SMF13A-HM3-08 are ideal for data and communication applications where sudden lightning surges must be diverted away from sensitive components. The SMF13A-HM3-08 is designed specifically for PDA, cell-phone, and other low-power telecom applications where low capacitance and low-power dissipation are necessary.

Working Principle

TVS diodes work by suppressing transient voltage and current spikes and diverting them away from the protected circuits. The SMF13A-HM3-08 contains a specially designed Zener diode that is able to absorb large amounts of energy in a fraction of a second. This Zener diode is in series with a shunt resistor that reduces the voltage supplied to the protected components, providing a latching effect that will keep the voltage at a safe and steady level until the surge has passed.

When the transient voltage exceeds the device’s Zener breakdown voltage, the TVS diode immediately conducts the transient current away from the protected circuit. The resistor in the device works to divert the excess current away from the protected circuit while also limiting the amount of direct current that can flow to the protected components. The result is an efficient and fast protection solution that will keep sensitive components safe from surges and transients.

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