STMicroelectronics ESDCAN04-2BWY

Overview

ESDCAN04-2BWY from STMicroelectronics is an AEC-Q101-qualified dual-line transient voltage suppressor (TVS) designed for bidirectional ESD and EOS protection of CAN H and CAN L signal lines in automotive networks. It features a breakdown voltage (V_BR) of 27.5 V, clamping voltage (V_CL) of 43 V at 3.7 A (8/20 µs), junction capacitance of 17–19 pF, and supports ISO 10605 ±30 kV contact/air discharge and ISO 7637-3 Pulse 3a/3b transients - enabling robust CAN-FD and high-speed bus compliance.

For engineers reviewing the ESDCAN04-2BWY datasheet, ESDCAN04-2BWY pinout, ESDCAN04-2BWY application, or ESDCAN04-2BWY equivalent, key selection criteria include its low clamping factor (V_CL/V_BR ≈ 1.56), SOT323-3L footprint compatibility with IPC7531, and verified performance under ISO 16750-2 jump-start/reverse-battery stress - critical for automotive body control modules and gateway ECUs.

Technical Context

This device implements a dual-channel, bidirectional TVS diode array in a single SOT323-3L package, with independent protection paths for CAN H and CAN L referenced to GND. Its low dynamic impedance ensures rapid clamping during ISO 10605 ESD events, while maintaining <19 pF line-to-ground capacitance to preserve signal integrity on CAN-FD buses up to 5 Mbps.

The device operates across –55 °C to +175 °C junction temperature and meets MSL Level 1 per J-STD-020, supporting lead-free reflow profiles up to 245 °C peak. Its ECOPACK2 construction complies with RoHS, UL94 V0, and automotive environmental stress requirements including ISO 16750-2 and ISO 7637-3 Pulse 2a/3a/3b.

Key Specifications

Pinout & Package

ESDCAN04-2BWY is housed in a JEDEC-registered SOT323-3L package (3-pin, 1.8 × 1.3 mm, 0.95 mm height), with exposed pad not present and no thermal slug. Pin 1 (CAN H) and Pin 2 (CAN L) are symmetrical signal terminals; Pin 3 is common GND - enabling direct inline placement between CAN controller and transceiver.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NUP4202MR6T1G and TPD2E001DRYR, ESDCAN04-2BWY uniquely balances low capacitance (17–19 pF), AEC-Q101 qualification, and full ISO 7637-3 Pulse 3a/b compliance - making it the only option qualified for next-generation CAN-FD gateways requiring simultaneous ESD robustness and high-speed signal fidelity.

Availability

ESDCAN04-2BWY is available at Aetrix Electronics and suitable for automotive body control modules, gateway ECUs, electric power steering systems, and charging communication interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ESDCAN04-2BWY 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, delivering silicon solutions for automotive, industrial, and smart mobility applications with emphasis on functional safety and reliability.

The ESDCANxx series belongs to ST's automotive-grade protection portfolio, engineered specifically to meet stringent ISO 11898-2/3 and ISO 16750-2 requirements while enabling CAN-FD and FlexRay signal integrity - targeting high-reliability vehicle networking nodes.

FAQ

What is the maximum operating junction temperature for ESDCAN04-2BWY?

The device is rated for continuous operation from –55 °C to +175 °C junction temperature, validated per AEC-Q101 stress tests including high-temperature operating life (HTOL) and temperature cycling. This enables deployment in engine bay and transmission control units where ambient temperatures exceed 125 °C.

Does ESDCAN04-2BWY require external biasing or control signals?

No - ESDCAN04-2BWY is a passive, bidirectional TVS diode array with no pins requiring voltage bias, enable signals, or configuration. It operates solely based on voltage threshold conduction between CAN H/CAN L and GND, with zero quiescent current draw in normal operation.

Can ESDCAN04-2BWY be used on LIN bus lines?

Yes - its low 17–19 pF capacitance, ±30 kV ESD rating, and 27.5 V V_BR make it compatible with LIN 2.2 physical layer requirements (V_DD = 12 V, bus voltage swing ±40 V). It has been deployed in LIN slave nodes for HVAC actuators and mirror controls where shared PCB space favors dual-function protection.

How does the clamping performance of ESDCAN04-2BWY compare to standard single-line TVS devices?

Unlike single-line TVS diodes, ESDCAN04-2BWY provides matched clamping on both CAN H and CAN L with identical V_CL (43 V) and dynamic impedance - eliminating differential-mode overshoot that can corrupt CAN arbitration. Its dual-channel symmetry reduces common-mode noise injection by >6 dB compared to discrete single-diode solutions.