Nexperia USA Inc. PESD27VV1BAX

Overview

PESD27VV1BAX from Nexperia is a bidirectional ESD protection diode in SOD323 (SC-76) package, designed to protect one signal line against IEC 61000-4-2 ESD events up to ±30 kV. It features a 27 V reverse stand-off voltage, 36 V clamping voltage at 3 A peak pulse current, and ultra-low 14–17 pF capacitance - ideal for low-speed automotive interface lines.

For engineers reviewing the PESD27VV1BAX datasheet, PESD27VV1BAX pinout, PESD27VV1BAX application, or PESD27VV1BAX equivalent, key selection criteria include clamping performance under 8/20 µs transients, AEC-Q101 qualification for automotive use, low leakage (<1 nA), and minimal capacitive loading on protected data lines.

Technical Context

This bidirectional TVS diode uses dual anti-parallel silicon avalanche structures to clamp both positive and negative transients symmetrically. Its 0.2 Ω dynamic resistance ensures rapid voltage suppression during ESD strikes, while the 27 V VRWM allows operation on 24 V nominal automotive signal rails without leakage-induced errors.

The device operates across –55 °C to +150 °C junction temperature and maintains stable clamping (34–45 V at 1–3 A) per IEC 61000-4-5 8/20 µs waveform. Its 14–17 pF capacitance at 0 V bias enables compatibility with RS-232, CAN, LIN, and other sub-10 Mbps interfaces where signal integrity must be preserved.

Key Specifications

Pinout & Package

SOD323 (SC-76) surface-mount plastic package: 2-pin, 1.3 mm pitch, 1.7 × 1.25 × 0.95 mm body size, cathode-bar marked on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PESD27VV1BAX, NUP2105LT1G offers higher standoff but compromises signal integrity with 25 pF capacitance and looser clamping; VEML6030X01 is unrelated optoelectronic hardware and must be excluded from ESD protection evaluation.

Availability

PESD27VV1BAX is available at Aetrix Electronics and suitable for automotive LIN bus protection, industrial RS-232 interface hardening, and consumer USB ID pin safeguarding requiring stable component supply and AEC-Q101 compliance.

Supply support for PESD27VV1BAX 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 and logic devices, with leadership in automotive-qualified components and advanced packaging.

PESD27VV1BAX belongs to Nexperia's ESD protection portfolio, engineered specifically for robust, low-capacitance transient suppression on automotive and industrial signal lines where AEC-Q101 reliability and precise clamping are mandatory.

FAQ

What is the maximum peak pulse current this diode can handle?

PESD27VV1BAX is rated for 3 A peak pulse current under IEC 61000-4-5 8/20 µs waveform conditions. This value is defined in the Absolute Maximum Ratings table and validated per AEC-Q101 stress testing. It is not intended for repetitive surge events - only for infrequent ESD or transient suppression.

Is this device unidirectional or bidirectional, and how does that affect circuit placement?

PESD27VV1BAX is strictly bidirectional, implemented as two anti-parallel diodes sharing common cathodes (Pins 1 and 2). This allows it to clamp both positive and negative transients on a single line without polarity constraints - enabling direct placement across any bidirectional or AC-coupled signal path without orientation concerns.

Does the 14–17 pF capacitance vary with applied voltage?

Yes - diode capacitance decreases as reverse bias increases. Per Figure 4 in the datasheet, Cd drops from ~17 pF at 0 V to ~8 pF at 20 V reverse bias. This voltage-dependent behavior is typical of junction capacitance and must be considered when designing for worst-case signal loading at minimum operating voltage.

Can this part replace PESD5V0S1BA in a 5 V system?

No - PESD27VV1BAX has 27 V VRWM and is intended for 24 V automotive systems, not 5 V logic. Using it on a 5 V line would result in excessive leakage and possible conduction during normal operation. For 5 V applications, PESD5V0S1BA (5 V VRWM) or PESD5V0X1BC (5 V, lower capacitance) are appropriate alternatives.