STMicroelectronics ESDCAN24-2BLY

Overview

ESDCAN24-2BLY from STMicroelectronics is an AEC-Q101-qualified dual-line bidirectional TVS diode for CAN H and CAN L bus protection in automotive networks. It features 27 V breakdown voltage (V_BR), 230 W peak pulse power (8/20 µs), 30 pF typical junction capacitance, ±30 kV ESD immunity (IEC 61000-4-2), and clamps to 43 V at 5.5 A IPP - enabling robust ISO 7637-3 transient and ESD suppression in high-speed CAN-FD systems.

For engineers reviewing the ESDCAN24-2BLY datasheet, ESDCAN24-2BLY pinout, ESDCAN24-2BLY application, or ESDCAN24-2BLY equivalent, this device is selected for CAN physical layer protection where low clamping factor (V_CL/V_BR ≈ 1.59), minimal signal distortion, and MSL1 reflow compatibility are critical in 12 V automotive ECUs and body control modules.

Technical Context

This dual-channel TVS operates as a symmetrical, bidirectional clamp between CAN H and CAN L lines and ground, with no polarity dependence. Its low 30 pF capacitance (measured IO1–GND/IO2–GND) and <0.1 µA leakage at 24 V ensure signal integrity on CAN-FD buses up to 5 Mbps without timing skew or reflection.

The device meets ISO 10605 (±30 kV contact/air, C=150/330 pF, R=330/2 kΩ), ISO 7637-3 (Pulse 3a: −150 V; Pulse 3b: +150 V; Pulse 2a: ±85 V), and IEC 61000-4-4 (4 kV EFT), while maintaining stable V_BR over −40 °C to +150 °C via temperature coefficient α_T = 0.1 × 10⁻⁴/°C.

Key Specifications

Pinout & Package

ESDCAN24-2BLY uses the SOT23-3L package: 3-pin, surface-mount, gull-wing leads, 2.75 mm × 1.75 mm footprint, 1.25 mm height, and 9.8 mg unit weight. Pin 1 is marked with a dot; orientation follows EIA-481 tape standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESDCAN01-2BLY and ESDCAN04-2BLY, ESDCAN24-2BLY delivers optimal balance of 27 V V_BR, 5.5 A IPP, and 43 V clamping - making it preferred for CAN-FD designs requiring both high surge robustness and low signal distortion.

Availability

ESDCAN24-2BLY is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera links, electric power steering ECUs, and infotainment gateways requiring stable component supply with AEC-Q101 assurance and MSL1 reflow compatibility.

Supply support for ESDCAN24-2BLY 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, designing and manufacturing microcontrollers, power ICs, sensors, and protection devices for automotive, industrial, and consumer markets.

ESDCAN24-2BLY belongs to ST's ESDCANxx-2BLY series - engineered specifically for automotive CAN/LIN physical layer protection, emphasizing low capacitance, high ESD immunity, and seamless integration with ISO 11898-2 and ISO 14229-1 compliant transceivers.

FAQ

Is ESDCAN24-2BLY compatible with CAN-FD data rates up to 5 Mbps?

Yes. With 30 pF typical junction capacitance and symmetrical bidirectional clamping, ESDCAN24-2BLY introduces negligible signal distortion on differential CAN H/L pairs. Measured S21 attenuation remains below −1 dB up to 100 MHz, supporting clean eye diagrams and bit error rates compliant with ISO 11898-2 FD specifications.

What is the maximum continuous reverse voltage this device can withstand?

The maximum continuous reverse voltage (V_RM) is 24 V, as specified in Table 2. At this voltage, leakage current is ≤0.1 µA at 25 °C and rises to <100 nA at 150 °C - ensuring no measurable DC loading on CAN bus idle states while preserving common-mode voltage stability.

Does ESDCAN24-2BLY require external biasing or direction selection?

No. It is a fully symmetrical, bidirectional TVS with identical electrical characteristics on both pins. No external components, polarity markings, or configuration resistors are needed - Pin 1 connects to CAN H, Pin 3 to CAN L, and Pin 2 to system GND per standard layout.

How does its clamping performance compare under ISO 7637-3 Pulse 3a versus Pulse 2a?

Under Pulse 3a (−150 V), ESDCAN24-2BLY clamps to ≤−40 V; under Pulse 2a (−85 V), it clamps to ≤−35 V. Both responses occur within <1 ns, and the device sustains full specification performance across 10,000+ pulses without parameter drift - verified per AEC-Q101 stress test conditions.