Nexperia USA Inc. PESD2CANFD24V-UX

Overview

PESD2CANFD24V-UX from Nexperia is a dual-channel automotive-grade ESD protection diode in SOT323 (SC-70) package, designed for bidirectional transient suppression on CAN-FD and CAN bus lines. It delivers 24 V reverse standoff voltage, 33 V clamping at 1 A, 6 pF capacitance, 23 kV IEC 61000-4-2 ESD rating, and AEC-Q101 qualification for under-hood vehicle networks.

For engineers reviewing the PESD2CANFD24V-UX datasheet, PESD2CANFD24V-UX pinout, PESD2CANFD24V-UX application, or PESD2CANFD24V-UX equivalent, key selection criteria include low clamping voltage for signal integrity, matched diode capacitance for differential bus timing, common-cathode topology for compact two-line protection, and high-temperature junction capability up to 175 °C in automotive environments.

Technical Context

This device implements a dual unidirectional TVS configuration with shared cathode (pin 3), enabling independent protection of two signal lines (e.g., CANH and CANL) while minimizing PCB footprint. Its low 6 pF diode capacitance ensures minimal signal distortion on high-speed CAN-FD buses operating up to 5 Mbps.

The clamping behavior is characterized by dynamic resistance of 0.7 Ω and stable VCL = 33 V (typ.) at IPP = 1 A under 8/20 µs surge, with verified performance across –55 °C to +175 °C ambient and junction temperature ranges per AEC-Q101 stress testing.

Key Specifications

Pinout & Package

Package: SOT323 (SC-70), 3-lead surface-mount plastic package, 2.0 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESD224-B1-W and NUF2221MUTAG, PESD2CANFD24V-UX uniquely balances 24 V standoff, 6 pF capacitance, and 23 kV ESD rating in an AEC-Q101-qualified dual-diode SC-70 package-making it optimal for CAN-FD gateways requiring both speed and ruggedness.

Availability

PESD2CANFD24V-UX is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, CAN-FD gateway modules, and powertrain sensor interfaces requiring stable component supply across extended temperature and lifecycle demands.

Supply support for PESD2CANFD24V-UX 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 essential semiconductors for automotive, industrial, and consumer markets, with leadership in ESD protection and logic devices.

This device belongs to Nexperia's Automotive ESD Protection portfolio, engineered specifically for robust transient suppression on high-speed in-vehicle networks-including CAN-FD, CAN, FlexRay, and SENT-while meeting stringent AEC-Q101 and ISO 16750 requirements.

FAQ

What is the maximum recommended PCB trace length between PESD2CANFD24V-UX and the protected CAN connector?

Per Nexperia application guidance, the trace length from device pins to connector should be ≤3 mm to limit inductance and ensure effective clamping. Longer traces increase voltage overshoot during ESD events; use ground vias adjacent to pins 1 and 2 to minimize loop area and maintain sub-33 V clamping performance.

Does PESD2CANFD24V-UX support bidirectional or unidirectional transient suppression?

PESD2CANFD24V-UX implements two unidirectional diodes with a shared cathode (pins 1 and 2 to pin 3), providing asymmetric clamping: it conducts only when the protected line goes positive relative to the common cathode. For true bidirectional protection, external series resistors or complementary diode configurations are required.

How does the 0.5% diode capacitance matching (ΔCd/Cd) impact CAN-FD signal integrity?

The ≤0.5% capacitance mismatch between K1–CC and K2–CC paths ensures balanced loading on differential CANH/CANL lines, reducing common-mode noise generation and preserving >30 dB CMRR at 5 Mbps. This matching directly supports ISO 11898-2 compliance for high-speed CAN physical layer timing budgets.

Can PESD2CANFD24V-UX be used for 12 V automotive LIN bus protection?

No-its 24 V reverse standoff voltage exceeds LIN's 12 V bus range, resulting in insufficient margin against normal-mode transients and potential leakage-induced bus pull-down. For LIN, Nexperia recommends PESD1CAN or similar 12–14 V VRWM devices with matched low capacitance.