SMF5V0A-HE3-08

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TVS or transient voltage suppressors are unidirectional, semiconductor-based devices designed to protect high value components and sub-assemblies from the effects of electrical overstress (EOS) which is caused by either electrostatic discharge or lightning. The SMF5V0A-HE3-08 is a type of TVS diode designed by Littelfuse which offers superior protection from surges in electronic circuits.

The SMF5V0A-HE3-08 is an ultra-low capacitance (C_d = 75 pF at 1 V), unidirectional TVS diode designed specifically for the telecommunication market. The device is intended to protect data lines (e.g., EIA/TIA-422, EIA/TIA-423) from high voltage transients induced by either electrostatic discharge (ESD) or lightning. The SMF5V0A-HE3-08 TVS diode can guard up to 1.37 kV of surge or ESD protection withclamping voltage of 5 V.

The SMF5V0A-HE3-08 is provided in an ultra-small SOD-882 SMPA Package and it offers improved thermal performance (increased power dissipation) due to an exposed pad on the backside of the package which also helps to reduce stray inductance. It is UL recognised and RoHS compliant, and the operating temperature range is -55°C to +125°C.

The working principle of a TVS diode is quite simple. The device is connected between a voltage source and the sensitive component to be protected. When the input voltage rises above a predetermined level (i.e., the breakdown voltage of the diode), the device quickly clamps the excess voltage and diverts it to ground. This prevents the voltage from rising to dangerous levels which may damage the components.

The SMF5V0A-HE3-08 is an ideal solution for protection of sensitive electronic devices in communication applications such as RS-232, RS422/3, 10/100 BaseT Ethernet, and ISDN. It is suitable for data lines which require either ESD or EFT protection, and is also suited for use in automotive, industrial, and consumer electronics products.

In summary, the SMF5V0A-HE3-08 TVS diode is an ultra-low capacitance, unidirectional device designed specific for telecommunications and other data lines. It offers superior protection by quickly clamping and diverting high voltage transients away from sensitive components. This device is provided in a small package, and is UL recognised and RoHS compliant. It is suitable for use in a variety of applications where high voltage transients may occur.

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