Its 3.3V (max) reverse standoff voltage means it stays off below that DC level, only conducting when an overvoltage event pushes the line above the 5V minimum breakdown threshold. Rated for 158W peak pulse power (8/20µs waveform), it absorbs a single surge of 11.2A peak pulse current before the clamping voltage reaches 14.1V max. That clamping ceiling protects downstream 3.3V CMOS inputs that typically fail above 5–6V. The 105pF capacitance at 1MHz is low enough to avoid loading high-speed digital lines like I2C, SPI, or UART, but check the signal edge rate — above 100 MHz the capacitive load starts to round the waveform.
Temperature range and package for the board
Housed in the SOD-523 (SC-79) package, it is a surface-mount two-pin device with a 0.50 mm pitch — standard for small-signal ESD clamps. The SOD-523 footprint is shared across many ESD5Z series parts, so a board layout for the sibling ESD5Z3.3T1G accepts this T5G variant without change.
onsemi lists the ESD5Z3.3T5G as Active. The base product number ESD5Z3.3 covers both the T5G and T1G tape-and-reel suffixes, so supply continuity is tied to the base die, not the reel variant. We source against your BOM quantity and confirm current pricing and lead time at quote — no stock-holding claim, no deferred 'contact manufacturer'.