Vishay General Semiconductor - Diodes Division VCAN33C2-03GHE3-08

Overview

VCAN33C2-03GHE3-08 from Vishay Semiconductors is a bidirectional symmetrical (BiSy) dual-line ESD protection diode in SOT-323 package, designed for CAN FD and FLEX-bus interfaces. It provides ±33 V reverse stand-off voltage, < 0.05 μA leakage current at VRWM, < 5.2 pF capacitance at 5 V, ±30 kV IEC 61000-4-2 contact/air discharge immunity, and AEC-Q101 qualification for automotive-grade robustness.

For engineers reviewing the VCAN33C2-03GHE3-08 datasheet, VCAN33C2-03GHE3-08 pinout, VCAN33C2-03GHE3-08 application, or VCAN33C2-03GHE3-08 equivalent, key selection criteria include low-capacitance dual-line protection for high-speed CAN FD buses, AEC-Q101 qualification status, clamping performance under 2 A 8/20 μs pulses, and SOT-323 footprint compatibility with space-constrained automotive ECUs.

Technical Context

This device implements a symmetrical dual-channel TVS architecture with matched diode pairs (pins 1–3 and 2–3), enabling bidirectional transient suppression on two independent signal lines without polarity constraints. Its low 4.2–5.2 pF capacitance at 5 V reverse bias ensures minimal signal integrity degradation on CAN FD data lines operating up to 5 Mbps.

The VCAN33C2-03GHE3-08 delivers 50–60 V clamping voltage at 2 A peak pulse current (IEC 61000-4-5 8/20 μs), with breakdown voltage tightly specified at 36–40 V (1 mA test). It supports junction temperatures from –55 °C to +175 °C and meets MSL Level 1 moisture sensitivity per J-STD-020.

Key Specifications

Pinout & Package

SOT-323 package: 3-pin surface-mount plastic case (1.3 × 1.8 × 0.9 mm), lead-free tin-plated terminations (e3), MSL Level 1, compatible with standard reflow profiles (peak 260 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with RCLAMP0524P.TCT and SP3205-01UTG, the VCAN33C2-03GHE3-08 uniquely combines 33 V stand-off, dual-channel symmetry, AEC-Q101 qualification, and sub-5.2 pF capacitance-making it the only drop-in solution for space-constrained, high-reliability CAN FD nodes requiring automotive-grade validation.

Availability

VCAN33C2-03GHE3-08 is available at Aetrix Electronics and suitable for automotive electronic control units, CAN FD-based ADAS sensor hubs, and FLEX-bus-enabled infotainment systems requiring stable component supply across extended production lifecycles.

Supply support for VCAN33C2-03GHE3-08 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 Intertechnology is a global manufacturer of discrete semiconductors and passive components, founded in 1962 and headquartered in Malvern, PA, with design and manufacturing operations across Asia, Europe, and the Americas.

The VCAN33C2-03GHE3-08 belongs to Vishay's BiSy ESD protection family, engineered specifically for high-speed automotive serial buses-including CAN FD, FLEX-bus, and LIN-where low capacitance, tight parameter matching, and AEC-Q101 reliability are mandatory.

FAQ

What is the primary circuit role of the VCAN33C2-03GHE3-08 in a CAN FD system?

The VCAN33C2-03GHE3-08 serves as a bidirectional dual-line ESD protection diode placed at the physical layer interface between the vehicle harness and the CAN FD transceiver. It clamps transient voltages-such as those from IEC 61000-4-2 ESD events-to ≤60 V while adding less than 5.2 pF capacitance per channel, preserving signal integrity on 2–5 Mbps data links. Its common-cathode SOT-323 configuration simplifies PCB layout for differential CAN_H/CAN_L protection.

Does the VCAN33C2-03GHE3-08 meet AEC-Q101 requirements for automotive underhood use?

Yes, the VCAN33C2-03GHE3-08 is explicitly AEC-Q101 qualified, with test reports confirming compliance across temperature cycling, high-temperature reverse bias (HTRB), and human-body-model ESD (class H3B > 8 kV). Its –55 °C to +175 °C junction temperature range and MSL Level 1 rating support direct placement in engine control modules, battery disconnect units, and other underhood applications where thermal and mechanical stress are severe.

How does the capacitance matching specification (dCD ≤ 2 %) benefit differential CAN FD signaling?

The ≤2 % capacitance mismatch (CD13 vs CD23 at VR = 5 V) ensures balanced loading on CAN_H and CAN_L lines, minimizing skew-induced jitter and common-mode noise conversion. This matching directly supports ISO 11898-2 compliance for CAN FD physical layer timing budgets, especially critical at 5 Mbps where even 10 ps skew can degrade eye height. The VCAN33C2-03GHE3-08 achieves this via matched die fabrication and symmetric bond-wire geometry in its SOT-323 package.

What is the maximum peak pulse current the VCAN33C2-03GHE3-08 can handle per channel?

The VCAN33C2-03GHE3-08 is rated for 2 A peak pulse current per protection path (pin 1–3 or pin 2–3) under IEC 61000-4-5 8/20 μs waveform conditions. At this current, its clamping voltage remains 50–60 V-well below the 70 V absolute maximum rating of typical CAN transceivers like the TCAN1042. This 2 A rating applies to single-shot events; repetitive surges require derating based on thermal time constants and PCB copper area.

Can the VCAN33C2-03GHE3-08 replace older unidirectional CAN protection diodes like SMAJ33A?

No-the VCAN33C2-03GHE3-08 is not a drop-in replacement for unidirectional diodes such as SMAJ33A. It uses a symmetrical bidirectional structure optimized for differential bus protection, whereas SMAJ33A is a single-line unidirectional TVS with different pinout, capacitance (≈200 pF), and clamping behavior. Replacing SMAJ33A with VCAN33C2-03GHE3-08 requires redesigning the layout to accommodate the common-cathode SOT-323 configuration and verifying signal integrity due to the 40× lower capacitance.