Littelfuse SP4020-01FTG-C TVS Diode, SOD-323, 3.3V, 21.8V, 750W

The Littelfuse SP4020-01FTG-C is a sophisticated uni-directional TVS diode designed for robust ESD and surge protection in sensitive electronic circuits. It integrates low-capacitance steering diodes with zener diodes to create a highly effective protection device, safeguarding ports against electrostatic discharge and lightning-induced transients.

This component is engineered to meet stringent international standards, capable of safely absorbing surge currents up to 30A (IEC61000-4-5, tp=8/20μs) without degradation. It offers a minimum of ±30kV ESD protection per the IEC61000-4-2 standard, ensuring reliability in demanding environments. A key advantage is its exceptionally low loading capacitance of just 2.5pF and minimal leakage current of 0.1μA at 3.3V, which prevents signal integrity loss—a critical factor for high-speed data lines.

Its compact SOD-323 case style makes it ideal for space-constrained PCB designs, providing powerful protection in a minimal footprint. The device is particularly suited for protecting telecommunication and data interfaces, including Ethernet ports, where maintaining signal speed and clarity is paramount while defending against voltage spikes.

With a high power dissipation of 750W and a maximum clamping voltage of 21.8V, it offers a reliable safety margin for circuits operating at 3.3V. This combination of high surge capability, low capacitance, and proven compliance with ESD, EFT, and lightning surge standards makes it a trusted choice for designers seeking to enhance product durability and meet regulatory requirements.