Active production — 4-channel USB ESD clamp
The D5V0FS4U10LP-7: This is a 4-channel unidirectional Zener TVS array rated for 20 W peak pulse power (8/20 µs) with a clamping voltage of 3 V typ at 3.5 A peak pulse current — sized for ESD strikes on USB 2.0 data lines where the 0.45 pF capacitance per channel keeps signal integrity intact.
0.45 pF — what it means for USB 2.0 eye pattern
The 0.45 pF capacitance at 1 MHz is low enough that the TVS does not degrade the USB 2.0 differential eye — the capacitive loading per data line stays under 1 pF even when accounting for PCB parasitics, so the 480 Mbps rise time budget is preserved. Four unidirectional channels in a single U-DFN2510-10 package cover D+/D− and VBUS/GND on one USB port — the 5 V max reverse standoff matches the USB VBUS rail, and the 5.5 V minimum breakdown gives margin above the 5 V nominal.
DIN-rail? No — this is a board-level SMT part
Surface-mount in a 10-UFDFN package (U-DFN2510-10), 2.5 mm × 1.0 mm body, 0.55 mm max seated height — the 0.50 mm pitch lands on a standard PCB footprint with no special via-in-pad requirement.