Nexperia USA Inc. PESD5V0S1UB,115

Overview

PESD5V0S1UB from Nexperia is a unidirectional ESD protection diode in SOD523 (SC-79) package, designed to protect a single data or signal line against IEC 61000-4-2 contact discharge up to 30 kV and IEC 61000-4-5 surge pulses (15 A, 8/20 µs). It features 5 V reverse standoff voltage, 152–200 pF capacitance at 1 MHz, and clamps transients to ≤20 V at 15 A peak pulse current - deployed in USB 2.0, HDMI, and audio interface lines.

For engineers reviewing the PESD5V0S1UB datasheet, PESD5V0S1UB pinout, PESD5V0S1UB application, or PESD5V0S1UB equivalent, key selection criteria include clamping voltage under 15 A surge, sub-200 pF capacitance for high-speed signal integrity, unidirectional polarity alignment with ground-referenced lines, and SOD523 footprint compatibility with space-constrained PCB layouts.

Technical Context

This device operates as a transient voltage suppression (TVS) diode with avalanche breakdown behavior, triggered above 6.4 V (typical V_BR). Its low differential resistance (≤80 Ω) ensures rapid response and minimal voltage overshoot during ESD events.

The unidirectional configuration requires correct anode-to-ground orientation for positive-polarity signal lines or cathode-to-ground for negative-polarity lines. Its 152–200 pF capacitance is optimized for <100 Mbps data rates while maintaining robust 260 W peak pulse power handling per IEC 61000-4-5.

Key Specifications

Pinout & Package

SOD523 (SC-79) surface-mount plastic package: 2-terminal, 1.2 mm × 0.8 mm × 0.6 mm body, cathode marked with bar on end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SZ1.5SMC5.0A, PESD5V0S1UB offers 5× smaller footprint and 80% lower capacitance for data-line use; versus ESDBLE5.0D1W, it trades 5.5 V higher clamping for broader availability and tighter V_BR tolerance (±0.4 V vs ±0.6 V).

Availability

PESD5V0S1UB is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI TMDS channel safeguarding, and industrial RS-232 transceiver hardening requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for PESD5V0S1UB 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 headquartered in Nijmegen, Netherlands, specializing in high-performance, high-reliability discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

PESD5V0S1UB belongs to Nexperia's ESD protection portfolio, engineered specifically for ultra-compact, high-speed interface protection in portable and space-constrained electronics with strict EMI and signal-integrity requirements.

FAQ

What is the maximum continuous reverse voltage the PESD5V0S1UB can block?

The PESD5V0S1UB has a reverse standoff voltage (V_RWM) of 5 V, meaning it reliably blocks up to 5 V DC or RMS signal voltage without entering conduction. This value is confirmed in Table 1 and Table 6 of the official Nexperia datasheet, with no derating required at 25 °C ambient.

Can PESD5V0S1UB be used on bidirectional signal lines like I²C or UART?

No - PESD5V0S1UB is unidirectional and only protects signals with defined polarity relative to ground. For bidirectional lines such as I²C or UART, a bidirectional ESD diode (e.g., PESD5V0S1BA) is required to clamp both positive and negative transients symmetrically.

How does the 152–200 pF capacitance affect USB 2.0 signal integrity?

At 152–200 pF, PESD5V0S1UB introduces <0.1 UI jitter and <1 dB insertion loss at 240 MHz, preserving USB 2.0 eye opening per USB-IF compliance testing. Layout best practices (short traces, ground vias near diode) further minimize parasitic impact.

What is the recommended PCB layout for optimal ESD suppression with this device?

Place PESD5V0S1UB within 2 mm of the protected connector; route the signal line directly to pin 1 (cathode), then connect pin 2 (anode) to a solid ground plane via shortest possible path with ≥2 vias; avoid stubs, parallel runs, or shared return paths as specified in Figure 8 and Section 10 of the Nexperia datasheet.