Vishay General Semiconductor - Diodes Division SM6T6V8AHM3_A/H

Overview

SM6T6V8AHM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 6.45 V minimum breakdown voltage (V_BR), 5.80 V stand-off voltage (V_WM), 10.5 V maximum clamping voltage (V_C) at 57 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics.

For engineers reviewing the SM6T6V8AHM3_A/H datasheet, SM6T6V8AHM3_A/H pinout, SM6T6V8AHM3_A/H application, or SM6T6V8AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction, low-inductance SMB package, and verified clamping performance under IEC 61000-4-2/4-5 surge conditions.

Technical Context

This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior. Its thermal resistance (R_θJA = 100 °C/W) and junction temperature limit (T_J = 150 °C) support reliable operation in compact PCB layouts with minimal copper pad area (0.2" × 0.2").

The device delivers consistent 600 W peak pulse power handling per 10/1000 μs waveform when mounted per recommended SMB pad layout, and exhibits low reverse leakage (≤1000 μA at V_WM) and high surge current capability (I_PPM = 57 A) - critical for protecting sensitive inputs against inductive switching spikes and ESD events.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on one end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ6.8A and SMCJ6.8A, SM6T6V8AHM3_A/H uniquely balances AEC-Q101 qualification, 600 W surge capacity, and SMB footprint - making it optimal for space-constrained automotive and industrial modules requiring validated reliability without oversizing.

Availability

SM6T6V8AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and consumer power adapter secondary-side protection requiring stable component supply and full traceability.

Supply support for SM6T6V8AHM3_A/H 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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.

The SM6T Series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and computing systems where AEC-Q101 compliance, low clamping voltage, and repeatable surge endurance are mandatory.

FAQ

What is the clamping voltage of SM6T6V8AHM3_A/H at its rated peak pulse current?

The SM6T6V8AHM3_A/H has a maximum clamping voltage (V_C) of 10.5 V at 57 A peak pulse current (I_PPM) under 10/1000 μs waveform conditions. This value is measured per Vishay's test methodology and ensures predictable overvoltage limiting for 5 V logic and analog circuits. The SM6T6V8AHM3_A/H maintains this clamping performance across its qualified temperature range and after multiple surge events when operated within datasheet limits.

Is SM6T6V8AHM3_A/H suitable for automotive applications?

Yes, SM6T6V8AHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - meeting automotive reliability standards for temperature cycling, humidity, and mechanical shock. Its SMB package, 150 °C max junction temperature, and validated surge performance make SM6T6V8AHM3_A/H appropriate for body control modules, sensor interfaces, and infotainment power rails in passenger vehicles and commercial fleets.

What does the "HM3" suffix indicate in SM6T6V8AHM3_A/H?

The "HM3" suffix in SM6T6V8AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates 7" tape-and-reel packaging (750 units), and "A/H" specifies revision code "A" and packaging variant "H". This distinguishes SM6T6V8AHM3_A/H from commercial-grade variants like SM6T6V8AE3 and ensures full compliance with automotive material and reliability requirements.

How does SM6T6V8AHM3_A/H compare to bidirectional TVS diodes in the same series?

SM6T6V8AHM3_A/H is unidirectional, meaning it conducts only during reverse-biased transients and blocks forward current - unlike bidirectional types (e.g., SM6T6V8CA) that clamp in both polarities. Its V_WM is 5.80 V and V_BR starts at 6.45 V, optimized for DC-biased lines. Bidirectional versions have symmetric characteristics but lack polarity marking and are unsuitable for circuits requiring forward blocking, such as 5 V supply rails protected by SM6T6V8AHM3_A/H.

What is the thermal resistance of SM6T6V8AHM3_A/H and how does it affect PCB layout?

The SM6T6V8AHM3_A/H has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces effective R_θJA, improving surge endurance. For sustained power dissipation or high ambient temperatures, layout must follow Vishay's recommended SMB pad dimensions to avoid exceeding the 150 °C max junction temperature - a key design constraint for SM6T6V8AHM3_A/H reliability.