Vishay General Semiconductor - Diodes Division SM6T6V8CAHE3/52

Overview

SM6T6V8CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 6.8 V breakdown voltage (V_BR), 10.5 V maximum clamping voltage (V_C) at 57 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.

For engineers reviewing the SM6T6V8CAHE3/52 datasheet, SM6T6V8CAHE3/52 pinout, SM6T6V8CAHE3/52 application, or SM6T6V8CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (V_C/V_BR ≈ 1.54), RoHS-compliant AEC-Q101 qualification, SMB footprint compatibility, and 150 °C max junction temperature for under-hood automotive environments.

Technical Context

The SM6T6V8CAHE3/52 operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity dependence. Its glass-passivated junction ensures stable V_BR tolerance (±5% min/max) and low leakage (<1000 μA at 5.8 V stand-off).

It delivers 600 W peak pulse power per 10/1000 μs waveform with thermal resistance R_θJA = 100 °C/W and R_θJL = 20 °C/W, enabling robust transient suppression on standard PCB copper pads (0.2" × 0.2") without heatsinking in most automotive and industrial layouts.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates orientation concerns during placement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with SMAJ6.8CA-E3/52 and 1.5KE6.8CA, the SM6T6V8CAHE3/52 uniquely combines AEC-Q101 qualification, SMB surface-mount compatibility, and 600 W pulse rating-making it the only option validated for next-generation automotive body electronics requiring zero-defect field reliability and automated production.

Availability

SM6T6V8CAHE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom power monitoring circuits, and infotainment USB protection requiring stable component supply across extended product lifecycles.

Supply support for SM6T6V8CAHE3/52 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The SM6T Series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure, engineered specifically to meet AEC-Q101 stress requirements while maintaining low clamping voltage and compact SMB packaging.

FAQ

What is the clamping voltage of the SM6T6V8CAHE3/52 under a 10/1000 μs surge?

The SM6T6V8CAHE3/52 has a maximum clamping voltage (V_C) of 10.5 V at 57 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88385 and ensures safe operation for 12 V automotive systems where downstream ICs require strict voltage limiting. The SM6T6V8CAHE3/52 maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).

Is the SM6T6V8CAHE3/52 suitable for automotive applications?

Yes, the SM6T6V8CAHE3/52 is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's SM6T datasheet (Rev. 09-Jan-2024). It undergoes rigorous stress testing including high-temperature operating life, temperature cycling, and unbiased HAST. The SM6T6V8CAHE3/52 is explicitly recommended for automotive body electronics, infotainment, and powertrain subsystems where transient immunity and long-term reliability are critical.

What does the "CA" suffix indicate in SM6T6V8CAHE3/52?

The "CA" suffix in SM6T6V8CAHE3/52 denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM6T6V8A), the SM6T6V8CAHE3/52 has no polarity marking and functions identically regardless of terminal orientation-critical for differential signal lines like CAN or USB where polarity reversal must not affect protection behavior.

What is the standoff voltage (V_WM) of the SM6T6V8CAHE3/52?

The standoff voltage (V_WM) of the SM6T6V8CAHE3/52 is 5.80 V, representing the maximum DC or continuous reverse voltage the device can withstand without exceeding 1000 μA leakage current. This value establishes the design margin below the 6.45–7.14 V breakdown range and ensures stable operation on 5 V logic rails or 12 V systems with ripple, preventing false triggering during normal operation. The SM6T6V8CAHE3/52 maintains this V_WM specification across its full temperature range.

Does the SM6T6V8CAHE3/52 require special PCB layout considerations?

No special layout is required beyond Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal, as specified in the SM6T datasheet. The SM6T6V8CAHE3/52's low-inductance SMB package and symmetrical bidirectional structure minimize trace-length sensitivity. However, routing should place the SM6T6V8CAHE3/52 as close as possible to the protected interface (e.g., connector or IC pin) to reduce parasitic inductance and ensure effective clamping before transient energy couples into sensitive circuitry.