Nexperia USA Inc. PESD2CANFD24UT-QR

Overview

PESD2CANFD24UT-QR from Nexperia is a dual-channel automotive-grade ESD protection diode in SOT23 package, designed specifically for CAN FD bus lines. It provides 24 V reverse standoff voltage, 30 kV IEC 61000-4-2 contact ESD immunity, 230 W peak pulse power (8/20 µs), clamping voltage of 41 V at 5 A, and diode capacitance of 25–30 pF - enabling robust transient suppression without signal integrity degradation in high-speed CAN FD networks.

For engineers reviewing the PESD2CANFD24UT-QR datasheet, PESD2CANFD24UT-QR pinout, PESD2CANFD24UT-QR application, or PESD2CANFD24UT-QR equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification, low leakage (<1 nA), ultra-low capacitance for >5 Mbps CAN FD compliance, and validated surge immunity per IEC 61000-4-5 at 5 A.

Technical Context

This device implements a common-cathode dual-diode architecture with two independent anodes (Pins 1 & 2) and shared cathode (Pin 3), enabling symmetrical bidirectional clamping on CANH and CANL lines. Its 24 V VRWM aligns precisely with CAN FD bus operating voltage margins, while sub-30 pF capacitance ensures minimal signal rise-time distortion at data rates up to 5 Mbps.

The diode's differential resistance of ≤300 Ω at 1 mA breakdown current supports fast turn-on during ESD events, and its junction temperature rating of 150 °C meets under-hood automotive thermal requirements. Compliance with IEC 61000-4-2 Level 4 (±30 kV contact) and IEC 61000-4-5 (5 A, 8/20 µs) confirms system-level transient resilience.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-pin, 1.9 mm × 1.1 mm footprint, 0.45 mm typical height, optimized for automated placement and reflow soldering per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESDALC6V1-2M3 and TPD2E007DRYR, PESD2CANFD24UT-QR uniquely delivers AEC-Q101 qualification, 30 kV ESD immunity, and CAN FD–optimized 25–30 pF capacitance at 24 V VRWM - making it the only drop-in solution for production automotive CAN FD transceiver protection.

Availability

PESD2CANFD24UT-QR is available at Aetrix Electronics and suitable for automotive ECU design, CAN FD gateway development, and electric power steering module production requiring stable component supply and full AEC-Q101 traceability.

Supply support for PESD2CANFD24UT-QR 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 essential efficiency technologies, delivering high-performance, high-reliability discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.

PESD2CANFD24UT-QR belongs to Nexperia's Automotive ESD Protection Diode product line, engineered specifically for high-speed differential bus interfaces including CAN FD, LIN, and FlexRay - with emphasis on low capacitance, AEC-Q101 compliance, and system-level IEC standard validation.

FAQ

What is the maximum recommended PCB trace length between PESD2CANFD24UT-QR and the CAN connector?

Trace length from the device to the protected CANH/CANL pins must be ≤3 mm to minimize inductance that degrades clamping response. Longer traces increase voltage overshoot during ESD events - verified via IEC 61000-4-2 testing with 8 kV contact discharge. Ground return path inductance must also be minimized using multiple vias to inner ground planes.

Does PESD2CANFD24UT-QR support fault-tolerant CAN (ISO 11898-2) and high-speed CAN FD (ISO 11898-2:2016) simultaneously?

Yes - its 24 V VRWM, bidirectional clamping, and 25–30 pF capacitance meet both ISO 11898-2 fault-tolerant CAN (dominant recessive voltage margins) and high-speed CAN FD (5 Mbps timing budgets). The common-cathode topology ensures matched clamping on both lines, critical for differential mode transient rejection.

Can PESD2CANFD24UT-QR be used in place of single-channel ESD diodes like PESD5V0S1BA?

No - PESD5V0S1BA has 5 V VRWM and unidirectional behavior, making it incompatible with 12 V CAN bus common-mode range. Substituting it would cause continuous conduction and bus failure. PESD2CANFD24UT-QR's 24 V rating and dual-anode architecture are mandatory for CAN FD line protection.

Is the 230 W peak pulse power rating per diode or per package?

The 230 W rating applies per diode - meaning each channel (Pin 1→3 and Pin 2→3) independently handles up to 230 W for 8/20 µs surge pulses. This is confirmed in Table 5 (Limiting values) and Fig 3 of the datasheet, where clamping curves are plotted per diode under identical test conditions.