Nexperia USA Inc. PESD3V3S2UT-QR

Overview

PESD3V3S2UT-Q from Nexperia is a unidirectional double ESD protection diode in SOT23 package, designed to protect two data lines against IEC 61000-4-2 level 4 ESD (±30 kV contact) and IEC 61000-4-5 surge (18 A, 8/20 µs). It features 3.3 V reverse standoff voltage, 207–300 pF capacitance, and 20 V clamping at 18 A - ideal for high-speed USB 2.0 and HDMI signal line protection.

For engineers reviewing the PESD3V3S2UT-Q datasheet, PESD3V3S2UT-Q pinout, PESD3V3S2UT-Q application, or PESD3V3S2UT-Q equivalent, key selection criteria include low clamping voltage under surge, ultra-low leakage (<700 nA), automotive qualification per AEC-Q101, and dual-line unidirectional topology with common-anode configuration.

Technical Context

This device implements a dual-cathode, single-common-anode structure enabling independent protection of two unidirectional signal paths referenced to ground. Its 3.3 V VRWM aligns with 3.3 V logic systems, while clamping at 20 V (IPP = 18 A) ensures safe voltage limiting during transients without disrupting normal operation.

The 207–300 pF capacitance (measured pin 1/2 to pin 3) supports high-speed interfaces up to ~300 Mbps, and its AEC-Q101 qualification confirms robustness across –65 °C to +150 °C junction temperature range - critical for automotive infotainment and ADAS sensor interfaces.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch); thermally optimized for PCB reflow and wave soldering per JEDEC TO-236AB outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional dual-line ESD protection applications.

Compared with NUP4201MR6T1G and D3V3Z1B2LP-7, PESD3V3S2UT-Q delivers superior high-speed performance (lower Cd), tighter clamping for 3.3 V rails, and proven AEC-Q101 reliability - making it the preferred choice for automotive USB and infotainment serial links.

Availability

PESD3V3S2UT-Q is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial USB peripherals, and HDMI display interfaces requiring stable component supply and long-term lifecycle support.

Supply support for PESD3V3S2UT-Q 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-volume, high-reliability discrete, logic, and MOSFET solutions - spun off from Philips and headquartered in Nijmegen, Netherlands.

This device belongs to Nexperia's Automotive-qualified ESD Protection portfolio, engineered specifically for robust transient suppression in safety-critical vehicle subsystems and industrial edge devices.

FAQ

What is the maximum recommended PCB trace length between PESD3V3S2UT-Q and the protected connector?

Per Nexperia application guidance, the trace from pin 1 or 2 to the protected line must be ≤3 mm, and the trace from pin 3 (anode) to the nearest low-inductance ground plane connection must be ≤2 mm. Longer traces increase inductance, raising clamped voltage during fast ESD events and reducing protection effectiveness.

Can PESD3V3S2UT-Q protect bidirectional data lines like RS-485 or CAN?

No - it is unidirectional only, with cathodes on pins 1 and 2 and a common anode on pin 3. It clamps positive transients to ground but does not conduct negative excursions. For bidirectional protection, a dual-diode array with back-to-back configuration (e.g., PESD5V0S2UT) is required.

Does the 30 kV ESD rating apply to both pins 1 and 2 simultaneously?

Yes - each cathode (pins 1 and 2) is independently rated for ±30 kV contact discharge per IEC 61000-4-2 when tested individually with pin 3 grounded. The device passes full qualification with ten pulses per pin, confirming robustness for multi-line interfaces.

How does junction temperature affect peak pulse power handling?

Peak pulse power derates linearly above 25 °C: at 125 °C junction temperature, PPPM drops to ~60% of the 330 W rated value (≈200 W), as shown in Figure 4 of the datasheet. Thermal design must ensure Tj stays below 150 °C during repetitive surge events.