2.5V reverse standoff for low-voltage signal protection
The ESD5Z2.5T1G is a unidirectional Zener TVS diode from onsemi, designed to clamp transients on 2.5V and 3.3V logic rails without interfering with normal signal levels. Its 2.5V (max) reverse standoff voltage means it stays off the line during normal operation, only conducting when a transient exceeds the 4V minimum breakdown voltage.
120W peak pulse in a SOD-523 footprint
Rated for 120W peak pulse power under the 8/20µs waveform, this part handles the energy from typical ESD strikes or inductive load dumps. The 11A peak pulse current at 10.9V clamping gives a clear margin for IEC 61000-4-2 level 4 events. The 145pF capacitance at 1MHz is low enough for USB 2.0 (480 Mbps) and similar high-speed interfaces, though it may load higher-frequency signals above 1 GHz.
SOD-523: compact surface-mount for dense boards
Housed in the SOD-523 package, also known as SC-79, this diode occupies about 1.6 mm × 0.8 mm of board space. The surface-mount footprint suits high-density layouts where every square millimeter counts.