SMF18A-HE3-08 Circuit Protection

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A transient voltage suppressor (TVS) diode – also known as a transient-voltage-suppression diode – is a type of diode that is designed to protect sensitive electronic components from high-voltage transient pulses such as those caused by electrostatic discharge (ESD). The SMF18A-HE3-08 is a TVS diode which is designed to protect against transient voltage spikes, surges and transients in sensitive electronics. This TVS diode is an ultra-low capacitance diode that is ideal for use in applications such as USB 2.0/3.0 ports, HDMI ports, and other high speed data applications.

Despite their small size, TVS diodes can provide significant protection from transient voltage spikes. The SMF18A-HE3-08 is designed to protect against transient voltage spikes up to 18 Volts with a peak pulse power of 600 Watts. This is made possible through its ultra-low capacitance of 0.25 pF, which allows for ultra-fast response times even at high frequencies. The SMF18A-HE3-08 is also designed to dissipate energy up to 1.5 Joules, and it has an operating temperature range of -55°C to +125°C.

The SMF18A-HE3-08 employs a fairly simple working principle. The diode works by clamping the voltage applied to the output of the device to the specified level. In other words, the diode quickly responds to any sudden changes in the voltage level across it, limiting the voltage that reaches the device. When a transient voltage spike occurs, the SMF18A-HE3-08 will start to conduct, shunting the excess current away from the sensitive components in the circuit. This helps to protect components from over-voltage, voltage transients and ESD.

The SMF18A-HE3-08 is commonly used in applications where protection of sensitive components from transients and voltage spikes is required. It is well-suited for use with USB ports as well as HDMI ports, and it can also be used in automotive applications. The SMF18A-HE3-08 can also be used with high-speed communication links, such as Ethernet and Firewire ports. In these applications, it is important to note that the SMF18A-HE3-08 is temperature-sensitive, so it should be implemented in a well-ventilated environment and not used in extreme temperature conditions.

In summary, the SMF18A-HE3-08 is a TVS diode that can provide significant protection from transient voltage spikes. It is an ultra-low capacitance diode, and it employs a simple working principle of clamping the voltage applied to the output of the device to the specified level. The SMF18A-HE3-08 is commonly used in applications where protection of sensitive components from transients and voltage spikes is required, particularly for USB and HDMI ports, as well as high speed communication links.

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