STMicroelectronics ESDCAN03-2BM3Y

Overview

ESDCAN03-2BM3Y from STMicroelectronics is an AEC-Q101-qualified bidirectional dual-line TVS diode designed for ESD and EOS protection of CAN H and CAN L signal lines in automotive controller area network interfaces. It delivers 28 V trigger voltage, 3.3 A peak pulse current (8/20 µs), 3.6 pF line capacitance, ±30 kV air discharge ESD immunity, and clamps to ≤36.5 V at 3 A-enabling robust protection for high-speed CAN-FD and LIN buses.

For engineers reviewing the ESDCAN03-2BM3Y datasheet, ESDCAN03-2BM3Y pinout, ESDCAN03-2BM3Y application, or ESDCAN03-2BM3Y equivalent, key selection criteria include low clamping factor (V_CL/V_TRIG ≈ 1.3), sub-4 pF line capacitance for signal integrity, QFN-3L package footprint compatibility with IPC7531, and compliance with ISO 10605 (±30 kV air), ISO 7637-3 (±150 V pulses), and jump-start/reverse-battery requirements.

Technical Context

This device implements a dual-channel transient voltage suppression architecture with matched silicon avalanche structures on both CAN H and CAN L lines, sharing a common GND terminal. Its low dynamic impedance ensures rapid turn-on above 28 V while maintaining <50 nA leakage at 24 V standoff-critical for preserving bus biasing and minimizing quiescent power loss in always-on automotive networks.

The QFN-3L package integrates symmetrical layout and wettable flanks to support automated optical inspection and reliable reflow soldering per J-STD-020 MSL Level 1. Its 3.3–3.6 pF per-line capacitance and <0.05 pF inter-line mismatch preserve signal edge fidelity up to CAN-FD 5 Mbps and future CAN XL physical layer timing margins.

Key Specifications

Pinout & Package

ESDCAN03-2BM3Y uses a QFN-3L (1.1 × 1.0 × 0.55 mm) package with wettable flanks, JEDEC-registered footprint, and IPC7531-compliant land pattern. Pin 1 (IO1) connects to CAN H, Pin 2 (IO2) to CAN L, and Pin 3 (GND) serves as shared cathode return path for both protection channels.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD2E001DRYR and SM712-02HT7, ESDCAN03-2BM3Y uniquely combines AEC-Q101 qualification, sub-4 pF capacitance, bidirectional symmetry, and 36.5 V clamping-making it the only option qualified for production automotive CAN-FD nodes requiring simultaneous ESD, EOS, and ISO 7637-3 immunity without signal integrity compromise.

Availability

ESDCAN03-2BM3Y 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 long-term automotive lifecycle support.

Supply support for ESDCAN03-2BM3Y 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with over 40 years of analog and protection device innovation.

ESDCAN03-2BM3Y belongs to ST's ECOPACK2-qualified automotive TVS portfolio, engineered specifically for high-reliability CAN/LIN bus protection in harsh environments-including under-hood, battery, and ADAS subsystems-where ESD robustness, low capacitance, and thermal resilience are non-negotiable.

FAQ

What is the maximum operating temperature for ESDCAN03-2BM3Y?

The device supports continuous operation from −55 °C to +175 °C junction temperature, validated per AEC-Q101 stress tests. This enables direct placement on engine control units, battery management systems, and other under-hood modules without derating, provided PCB thermal vias and copper pour meet ST's recommended layout guidelines in DS13559 Section 3.6.

Does ESDCAN03-2BM3Y require external biasing for CAN bus protection?

No. ESDCAN03-2BM3Y is inherently bidirectional and requires no external DC bias or polarity configuration. Its symmetrical avalanche structure protects both CAN H and CAN L against positive and negative transients equally-eliminating the need for separate TVS diodes or complex bias networks used in unidirectional solutions.

How does the 3.6 pF line capacitance affect CAN-FD signal integrity?

At 3.6 pF per line, ESDCAN03-2BM3Y introduces negligible capacitive loading-less than 1% of typical CAN-FD bus capacitance (≤1000 pF). Measured S21 data (DS13559 Figure 14) confirms <0.5 dB insertion loss up to 500 MHz, preserving rise times below 1 ns and enabling error-free 5 Mbps operation without equalization or pre-emphasis.

Is the QFN-3L package compatible with standard reflow profiles?

Yes. The device is qualified for J-STD-020 MSL Level 1 and supports ST's recommended reflow profile (DS13559 Figure 25): peak temperature 240–245 °C, 60–90 s above 217 °C, ramp rate ≤3 °C/s. Its wettable flank design enables automated optical inspection of solder joints, and the 100 μm stencil thickness recommendation ensures consistent paste volume for all three terminals.