Rail-to-rail steering topology for high-speed line protection
The NUP4202W1T2G is a Steering (Rail to Rail) TVS diode array from onsemi — it clamps transients to the supply rails rather than ground. Four unidirectional channels in a single SC-88/SOT-363 package cover up to four data lines. Rated for 500W peak pulse power (8/20µs waveform) with a typical clamping voltage of 14.5V at 28A peak pulse current — this power density in a 6-pin package is unusual and suits industrial ESD/EFT environments where the transient energy is high but the board space is tight. The 3pF capacitance at 1MHz keeps signal integrity intact on high-speed differential pairs.
5V rail match and temperature range for industrial use
With a 5V (max) reverse standoff voltage, the NUP4202W1T2G sits directly on 5V logic rails without conducting during normal operation. The minimum breakdown voltage of 6V provides a guard band above the rail, so the device stays off until a transient pushes the line above 6V. Surface-mount SC-88/SC70-6/SOT-363 footprint — the 0.65 mm pitch is layout-friendly on two-layer boards, and the small body (2.0 mm × 1.25 mm) fits under RF shields or between connector headers.
Active lifecycle — no last-time-buy pressure yet
onsemi lists the NUP4202W1T2G as Active with no announced end-of-life. The base product number NUP4202 is a mature series, so the reel supply should remain stable for the next several years. Store reels in the original bag below 30°C / 60% RH.
Sourcing and RFQ — how to get a price and lead time
For BOM planning, the SC-88 package is widely second-sourced by other TVS diode arrays with similar pinouts — confirm the mating footprint and channel count before selecting an alternative.