SM4T39AY

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TVS - Diodes

Transient Voltage Suppressors (TVSs), also known as Transient Voltage Surge Suppressors, are a type of protection diode with the primary role of safeguarding electronics circuits from transient voltage events such as electrical overstress (EOS), electrostatic discharge (ESD) and electrical fast transients (EFT). They are commonly used to protect equipment and data lines against ESD, electrical over-voltage conditions, and lightning-induced voltage transients. TVS diodes are usually used in automotive, consumer electronics, telecommunications, industrial, medical, networking, and military applications.

SM4T39AY Application Field and Working Principle

The SM4T39AY is a high-power, low-capacitance Unidirectional Transient Voltage Suppressor (TVS) Device designed specifically for high-speed data and telecommunications applications. This device provides superior capabilities and performance compared to stand-alone TVSs and is suitable for ESD, EFT, lightning and surge protection. It is designed to protect data and power lines from destructive voltage transients, and works by rapidly diverting and absorbing the energy resulting from a voltage transient, before it reaches sensitive components.

The SM4T39AY is an excellent choice for high-speed data lines, as it features a low capacitance value of only 0.010 pF. This low-capacitance values helps reduce signal reflections on the data lines and ensures signal integrity. Additionally, the SM4T39AY has a fast response time of 2.5 ns, great DC breakdown voltage of 30 V, excellent clamping capability, and low leakage current, making it a perfect choice for surge and transient protection applications. Furthermore, it is also resistant to environemental stress and can work in temperatures as low as -55°C.

The SM4T39AY features a small SOD-123R package which allows for ease of assembly and board mounting in a variety of small electronic devices. It is capable of handling high-currents ranging from 12 A to 20 A and can withstand high-energy transients up to 350 W (8/20 µs waveform.) Additionally, it has a low-operating voltage and leakage current, making it suitable for power line protection applications as well.

In conclusion, the SM4T39AY is a great choice for surge and transient protection applications and can protect data and power lines from destructive voltage transients. It offers excellent protection capabilities, superior performance, ease of assembly, and great clamping capability. Furthermore, its high-current handling, low capacitance, and fast response time make it a great choice for data line protection.

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