The SP33R6-04UTG from Littelfuse is a 4 Channel Avalanche Breakdown Diode. It has a breakdown voltage of 0.6-0.9 V and a reverse standoff voltage of 0.3 V. This bi-directional diode has a reverse leakage current of up to 100 nA and has a dynamic resistance of 0.3 ohms. It consists of four channels with 0.2 pF low capacitance per I/O to protect ultra-high-speed interfaces. This RoHS compliant TVS (transient voltage suppression) diode provides extremely low breakdown/turn-on voltages, making it an ideal protector of high-speed data lines with low voltage (-0.3 to +0.3 V) levels. It is available in a surface-mount package and is suitable for USB 3.2, USB 4.0, Thunderbolt 3.0, and PCIe.applications.