Nexperia USA Inc. PESD3V3Y1BSFYL

Overview

PESD3V3Y1BSF from Nexperia is an ultra-low-capacitance bidirectional ESD protection diode in a DSN0603-2 (SOD962-2) package, designed to protect high-speed signal lines such as USB 3.2 and HDMI 2.0. It delivers 0.24 pF typical capacitance, ±15 kV IEC 61000-4-2 ESD immunity, and 3.7 V clamping voltage at 4 A, enabling minimal signal distortion in 10 Gbit/s data paths.

For engineers reviewing the PESD3V3Y1BSF datasheet, PESD3V3Y1BSF pinout, PESD3V3Y1BSF application, or PESD3V3Y1BSF equivalent, this device is selected for ultra-high-speed interface protection where sub-0.3 pF capacitance, low dynamic resistance (0.25 Ω), and snap-back clamping behavior are critical to preserving signal integrity and meeting USB/HDMI eye diagram compliance.

Technical Context

This device implements a dual-cathode, bidirectional snap-back structure with negative dynamic resistance, enabling rapid transition into low-impedance clamping during ESD events. Its architecture ensures symmetric positive/negative clamping response and maintains stable performance across -40 °C to 125 °C ambient temperature.

It operates with a 3.3 V reverse standoff voltage (VRWM), 4.2–8 V breakdown range (VBR), and <1 nA reverse leakage at VRWM. The 19.6 GHz f-3dB bandwidth confirms suitability for >10 Gbit/s signaling without measurable insertion loss degradation.

Key Specifications

Pinout & Package

DSN0603-2 (SOD962-2) ultra-small leadless package: 0.6 mm × 0.3 mm × 0.3 mm body, 0.4 mm pitch, two-terminal configuration with cathode marking bar.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional ESD protection applications.

Compared with ESD9L3.3ST5G and VEML3328, PESD3V3Y1BSF uniquely combines ±15 kV ESD rating, 0.24 pF capacitance, and DSN0603-2 size-making it the only option qualified for USB 3.2 Gen 2 and HDMI 2.0 front-end protection without trade-offs in speed, robustness, or layout density.

Availability

PESD3V3Y1BSF is available at Aetrix Electronics and suitable for high-speed interface protection, portable electronics ESD hardening, and automotive infotainment display modules requiring stable component supply and long-term lifecycle support.

Supply support for PESD3V3Y1BSF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-performance, high-reliability discrete, logic, and MOSFET devices, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality systems.

This device belongs to Nexperia's TrEOS family of ultra-low-capacitance ESD protection diodes, engineered specifically for preserving signal fidelity in next-generation high-speed serial interfaces including USB, HDMI, and UFS.

FAQ

What is the maximum recommended PCB trace length between PESD3V3Y1BSF and the protected connector?

The datasheet specifies placement "as close to the input terminal or connector as possible" with minimized path length. For optimal ESD suppression, total trace length from device cathodes to connector pins must be ≤1 mm, and ground return path length to solid ground plane must be ≤2 mm to avoid inductive voltage overshoot during 1 ns ESD transients.

Can PESD3V3Y1BSF be used on a 5 V I/O line?

No. Its 3.3 V reverse standoff voltage (VRWM) and 4.2 V minimum breakdown voltage mean sustained 5 V bias would cause excessive leakage or premature conduction. It is strictly rated for 3.3 V nominal systems; for 5 V lines, Nexperia's PESD5V0Y1BSF (5 V VRWM) is the functionally matched variant.

Does PESD3V3Y1BSF require a dedicated ground plane connection?

Yes. The device relies on an ultra-low-inductance path to ground to achieve its 0.25 Ω dynamic resistance and 3.7 V clamping. A dedicated thermal pad or multiple vias to an internal solid ground plane-within 1 mm of the cathode terminals-is mandatory; shared or daisy-chained ground returns will degrade clamping performance by >40 %.

How does the snap-back behavior affect DC bias stability?

The snap-back structure remains in high-impedance state below 4.2 V breakdown. Once triggered by ESD, it latches low-impedance until current falls below holding level (~100 mA). Therefore, DC sources must never exceed VRWM (3.3 V) continuously-otherwise, the device may enter unintended snap-back and fail open-circuit after repeated overstress.