Vishay General Semiconductor - Diodes Division VCAN26B2-03GHE3-18

Overview

VCAN26B2-03GHE3-18 from Vishay Semiconductors is a bidirectional symmetrical (BiSy) dual-line ESD protection diode in SOT-323 package, designed for CAN bus and CAN FD interfaces. It provides ±26.5 V reverse stand-off voltage, 3 pF typical capacitance at 5 V, <0.05 μA leakage current, ±25 kV contact/±30 kV air ESD immunity per IEC 61000-4-2, and AEC-Q101 qualification for automotive applications.

For engineers reviewing the VCAN26B2-03GHE3-18 datasheet, VCAN26B2-03GHE3-18 pinout, VCAN26B2-03GHE3-18 application, or VCAN26B2-03GHE3-18 equivalent, key selection criteria include low-capacitance dual-line protection for high-speed CAN FD data lines, robust ±25 kV ESD clamping performance, and AEC-Q101-compliant reliability in harsh automotive environments.

Technical Context

The VCAN26B2-03GHE3-18 integrates two matched, bidirectional ESD protection paths (Pin 1–3 and Pin 2–3) in a single SOT-323 device, enabling symmetrical transient suppression on differential CAN H/L lines without polarity sensitivity. Its BiSy architecture ensures identical clamping behavior in both directions, critical for maintaining signal integrity in full-duplex CAN FD communication.

It operates across –55 °C to +150 °C junction temperature, supports peak pulse power of 100 W (8/20 μs), and delivers tight capacitance matching (≤0.3 pF difference between channels at 5 V), minimizing skew and ensuring balanced line impedance for data rates up to 5 Mbps.

Key Specifications

Pinout & Package

SOT-323 package: 3-pin surface-mount plastic case, MSL level 1, lead (Pb)-free tin-plated terminations (e3), footprint compatible with JEDEC MO-203AA.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VCAN26C2-03GHE3-18, the VCAN26B2-03GHE3-18 offers tighter clamping (34 V vs. 43 V) for better transceiver protection, while TPD2E001DRYR lacks voltage rating, qualification, and channel integration required for CAN FD deployment.

Availability

VCAN26B2-03GHE3-18 is available at Aetrix Electronics and suitable for automotive ECU design, industrial CAN gateway development, and electric power steering module production requiring stable component supply and long-term lifecycle support.

Supply support for VCAN26B2-03GHE3-18 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

Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.

The VCAN series targets high-speed automotive serial buses, with the VCAN26B2-03GHE3-18 engineered specifically for CAN FD compliance, low-capacitance signal preservation, and AEC-Q101 stress resilience.

FAQ

What is the primary function of the VCAN26B2-03GHE3-18 in a CAN FD system?

The VCAN26B2-03GHE3-18 serves as a dual-line, bidirectional ESD protection diode that safeguards CAN FD transceivers from electrostatic discharge events. It clamps transients on both CAN_H and CAN_L lines simultaneously using a shared cathode (Pin 3), preserving signal integrity with only 3 pF capacitance at 5 V. Its ±25 kV contact ESD rating ensures robustness during handling and operation in automotive environments where the VCAN26B2-03GHE3-18 is commonly deployed.

Is the VCAN26B2-03GHE3-18 suitable for new automotive designs?

No-the official Vishay documentation states "Not For New Designs" and recommends VCAN26C2-03G as the alternative device. While the VCAN26B2-03GHE3-18 remains available and qualified to AEC-Q101, it is designated for legacy program support only. New automotive designs should evaluate VCAN26C2-03GHE3-18, which offers improved clamping performance and ongoing production commitment. The VCAN26B2-03GHE3-18 is still valid for repair, replacement, or continuity builds.

How does the VCAN26B2-03GHE3-18 achieve matched capacitance between its two protection channels?

The VCAN26B2-03GHE3-18 achieves ≤0.3 pF capacitance mismatch between Pin 1–3 and Pin 2–3 through monolithic die construction and symmetric layout design. This matching is measured at VR = 5 V and ensures balanced loading of differential CAN FD signals, reducing skew and common-mode conversion. The specification is verified per production test flow and documented in the Electrical Characteristics table of the VCAN26B2-03GHE3-18 datasheet (Document Number: 86160).

What is the maximum operating temperature range for the VCAN26B2-03GHE3-18?

The VCAN26B2-03GHE3-18 has a specified junction temperature range of –55 °C to +150 °C, fully compliant with AEC-Q101 stress testing requirements. This allows reliable operation in under-hood automotive locations and industrial enclosures subject to thermal cycling. Derating is not required up to 150 °C, and the VCAN26B2-03GHE3-18 maintains its 26.5 V reverse stand-off voltage and <0.1 μA leakage (at 125 °C) across this full range.

Does the VCAN26B2-03GHE3-18 require external biasing or direction selection?

No-the VCAN26B2-03GHE3-18 uses a bidirectional symmetrical (BiSy) architecture with no polarity dependence. Pins 1 and 2 serve as interchangeable anode/cathode terminals for their respective lines, while Pin 3 is the common cathode reference. This eliminates the need for orientation-aware placement or external bias networks. The VCAN26B2-03GHE3-18 functions identically regardless of whether Pin 1 connects to CAN_H or CAN_L, simplifying layout and assembly.