Nexperia USA Inc. PESD2CANFD27L-UX

Overview

PESD2CANFD27L-UX from Nexperia is a dual-channel automotive-grade ESD protection diode in SOT323 (SC-70) package, designed for CAN-FD and CAN bus lines with 27 V reverse standoff voltage, 31 V clamping at 1 A, and 10 pF ultra-low capacitance. It provides 30 kV IEC 61000-4-2/ISO 10605 ESD immunity and operates up to 175 °C junction temperature in engine bay and ADAS modules.

For engineers reviewing the PESD2CANFD27L-UX datasheet, PESD2CANFD27L-UX pinout, PESD2CANFD27L-UX application, or PESD2CANFD27L-UX equivalent, this device is selected for high-speed automotive serial bus protection where low capacitance, precise clamping, AEC-Q101 qualification, and dual-line common-cathode topology are required.

Technical Context

This bidirectional ESD protection array integrates two matched TVS diodes sharing a common cathode (Pin 3), enabling symmetrical transient suppression on differential CAN-FD lines without polarity constraints. Its 9–10 pF capacitance per channel ensures minimal signal integrity degradation at >5 Mbps data rates.

The device uses silicon avalanche technology with 28–38 V breakdown voltage and 0.55 Ω dynamic resistance, delivering fast response (<1 ns) to ESD events while maintaining <50 nA leakage at 27 V. It meets IEC 61000-4-5 surge (8/20 µs, 3.9 A) and ISO 10605 (150 pF/330 Ω) requirements for harsh automotive environments.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 3-pin, 1.3 mm pitch, 2.0 × 1.25 × 0.95 mm body. Designed for reflow/wave soldering with defined footprint per Fig. 13–14.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NUF2221MUTAG and VEMLF27A, PESD2CANFD27L-UX delivers superior high-speed performance due to its 10 pF capacitance and tighter ΔCd matching, making it the only option validated for robust 5 Mbps CAN-FD operation in constrained SOT323 layouts.

Availability

PESD2CANFD27L-UX is available at Aetrix Electronics and suitable for automotive ECU design, ADAS sensor integration, and powertrain control systems requiring stable component supply across multi-year production cycles.

Supply support for PESD2CANFD27L-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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.

This device belongs to Nexperia's Automotive ESD Protection portfolio, engineered specifically for high-reliability transient suppression on high-speed in-vehicle networks including CAN-FD, CAN, FlexRay, and SENT interfaces.

FAQ

What is the maximum recommended PCB trace length between PESD2CANFD27L-UX and the connector?

The datasheet specifies placement "as close to the input terminal or connector as possible" - empirical validation shows optimal ESD suppression occurs when trace length from connector pad to Pin 1/2 is ≤3 mm. Longer traces increase inductance, degrading clamping response and allowing voltage overshoot beyond 31 V during 30 kV ESD events.

Can PESD2CANFD27L-UX protect both CANH and CANL simultaneously with a single device?

Yes - its dual-channel common-cathode configuration (Pins 1 & 2 as cathodes, Pin 3 as shared cathode to ground) enables simultaneous protection of CANH and CANL lines. Each channel operates independently with matched parameters, ensuring balanced clamping without cross-talk or asymmetry.

Does the 30 kV ESD rating apply to both contact and air discharge per IEC 61000-4-2?

The datasheet explicitly states "ESD protection up to 30 kV (IEC 61000-4-2)" and references contact discharge testing in Table 5. Air discharge rating is not specified; design must rely on the validated 30 kV contact discharge performance, which covers the most severe OEM test condition.

Is the 10 pF capacitance measured at zero bias or operating voltage?

Per Table 6, Cd = 10 pF (max) is measured at f = 1 MHz and VR = 0 V, Tamb = 25 °C. At 27 V reverse bias, capacitance drops to ~6.5 pF (Fig. 4), confirming minimal loading on active CAN-FD bus signals operating within ±25 V common-mode range.