Nexperia USA Inc. PESD1CAN-UX

Overview

PESD1CAN-U from Nexperia is a dual-line automotive CAN bus ESD protection diode in SOT323 (SC-70) package, featuring 24 V reverse standoff voltage, 9.3–12 pF capacitance at 1 MHz, and 35 V clamping voltage at 1 A peak pulse current. It protects CANH/CANL lines against IEC 61000-4-2 level 4 ESD (23 kV contact), IEC 61000-4-5 surge (3 A, 8/20 µs), and is AEC-Q101 qualified for under-hood vehicle networks.

For engineers reviewing the PESD1CAN-U datasheet, PESD1CAN-U pinout, PESD1CAN-U application, or PESD1CAN-U equivalent, this device delivers matched capacitance (ΔCd/Cd = 0.1%), low dynamic resistance (1.5 Ω), and common-cathode dual-diode topology optimized for bidirectional CAN signal integrity and transient suppression in space-constrained automotive PCB layouts.

Technical Context

This device implements a dual-channel, common-cathode ESD protection structure with two independent anodes (pins 1 and 2) tied to a shared cathode (pin 3), enabling symmetrical clamping of both CANH and CANL lines relative to ground. Its bidirectional operation supports ±23 kV IEC 61000-4-2 ESD pulses without polarity constraints.

Capacitance matching (ΔCd/Cd = 0.1%) ensures minimal skew between CANH and CANL signal paths, preserving differential timing integrity. The 1.5 Ω dynamic resistance and 35 V clamping at 1 A support fast energy diversion while maintaining bus voltage compliance during transients.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.15 mm × 0.45 mm body, 0.65 mm lead pitch, three gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD2E001DRYR and ESDALC6V1-1U2, PESD1CAN-U uniquely combines AEC-Q101 qualification, 0.1 % capacitance matching, and integrated dual-line topology in SOT323 - delivering superior CAN signal integrity, smaller footprint, and guaranteed automotive reliability in a single component.

Availability

PESD1CAN-U is available at Aetrix Electronics and suitable for automotive CAN gateway modules, electric power steering control units, and ADAS camera hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PESD1CAN-U 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 logic, analog, and ESD protection solutions, with core expertise in automotive-grade discrete components.

PESD1CAN-U belongs to Nexperia's automotive-qualified ESD protection portfolio, engineered specifically for CAN bus interface hardening in demanding vehicle subsystems where signal integrity, space constraints, and AEC-Q101 compliance are mandatory.

FAQ

What is the maximum operating temperature for PESD1CAN-U in automotive applications?

The device is rated for junction temperatures up to 150 °C and ambient temperatures from −55 °C to +150 °C, fully compliant with AEC-Q101 thermal stress requirements. Its SOT323 package enables effective heat dissipation in engine bay and transmission control unit environments when mounted on thermally enhanced PCB copper pours.

How does the 0.1 % capacitance matching benefit CAN FD implementations?

This matching ensures differential capacitance imbalance remains below 0.012 pF between CANH and CANL paths, limiting inter-line timing skew to under 10 ps - well within the 50 ps budget for 5 Mbps CAN FD bit timing, preventing sampling errors and CRC failures during high-speed data bursts.

Can PESD1CAN-U be used for non-automotive CAN applications?

Yes - its 24 V VRWM, 35 V clamping, and 23 kV ESD rating make it suitable for industrial CAN networks, medical equipment interfaces, and commercial vehicle telematics. However, AEC-Q101 qualification provides added confidence in long-term reliability even outside automotive use cases.

Why is the common cathode configuration advantageous for CAN bus protection?

The shared cathode (pin 3) establishes a single, low-inductance ground reference for both CANH and CANL clamping paths, minimizing ground bounce and ensuring simultaneous voltage limiting during differential transients - unlike discrete diodes that may exhibit staggered turn-on due to ground path inductance differences.