What the 181W peak pulse rating means for your BOM
The ESD5Z6.0T5G is a single-channel Zener-type TVS diode from onsemi, rated for 181W peak pulse power (8/20µs waveform) — enough to shunt common ESD strikes and moderate transients on general-purpose I/O lines without needing a larger package.
Capacitance and signal integrity trade-off
Capacitance is 70pF at 1MHz — low enough for most low-speed and moderate-speed digital interfaces (I²C, UART, GPIO) but not suited for high-frequency RF or multi-Gbps differential pairs where sub-1pF parts are needed. The 70pF load adds roughly 4–5 pF per line after PCB parasitics; if your bus runs above 10 MHz, verify the RC time constant against your edge-rate budget.
Production is ongoing, and the part is available through franchised and independent distribution channels.
Package and footprint — SOD-523
Housed in the SOD-523 package (SC-79 equivalent), a 1.6 mm × 0.8 mm body with 0.60 mm pitch — suitable for high-density PCB layouts where board space is tight.