Vishay General Semiconductor - Diodes Division SM6T10AHM3/H

Overview

SM6T10AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMB (DO-214AA) package, with 10 V standoff voltage (VWM), 14.5 V clamping voltage (VC) at 41 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs and ICs against inductive switching transients in automotive sensor signal lines.

For engineers reviewing the SM6T10AHM3/H datasheet, SM6T10AHM3/H pinout, SM6T10AHM3/H application, or SM6T10AHM3/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR = 1.37), and thermal resistance of 100 °C/W junction-to-ambient.

Technical Context

This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable breakdown behavior, while the SMB package enables automated placement and meets MSL level 1 (260 °C reflow peak).

The device delivers 600 W peak pulse power handling with 10/1000 μs waveform, clamps at ≤14.5 V under 41 A transient current, and maintains ≤10 μA reverse leakage at 8.55 V standoff - enabling reliable overvoltage suppression without false triggering in low-power sensor interfaces.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ10A and SMCJ10A, SM6T10AHM3/H uniquely combines AEC-Q101 qualification, halogen-free compliance, and SMB footprint - making it optimal for space-constrained automotive modules where qualification and regulatory alignment are mandatory.

Availability

SM6T10AHM3/H is available at Aetrix Electronics and suitable for automotive sensor systems, industrial PLC I/O modules, consumer power adapter outputs, and telecom line interface circuits requiring stable component supply across long production lifecycles.

Supply support for SM6T10AHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.

The SM6T Series is engineered for robust transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping voltage, and consistent surge endurance are essential design requirements.

FAQ

What is the clamping voltage of SM6T10AHM3/H at its rated peak pulse current?

The SM6T10AHM3/H has a maximum clamping voltage (VC) of 14.5 V when subjected to a 10/1000 μs waveform peak pulse current of 41.0 A. This value is measured under standardized test conditions per JEDEC standards and ensures downstream components experience limited overvoltage stress during transient events. The SM6T10AHM3/H maintains this clamping performance across its full operating temperature range.

Is SM6T10AHM3/H qualified for automotive applications?

Yes, SM6T10AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88385. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and accelerated life - validating its suitability for under-hood and chassis-mounted automotive electronics. The SM6T10AHM3/H meets the reliability requirements for engine control units, ADAS sensors, and body control modules.

What does the "HM3" suffix indicate in SM6T10AHM3/H?

The "HM3" suffix in SM6T10AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive environmental and reliability standards. The "H" in the full part number indicates 7" tape-and-reel packaging (750 units), while "/H" is the revision code per Vishay's ordering nomenclature. SM6T10AHM3/H is fully traceable and manufactured to automotive-grade process controls.

How does SM6T10AHM3/H compare to bidirectional TVS diodes like SM6T10CA?

SM6T10AHM3/H is unidirectional and designed for DC-biased lines where polarity is fixed (e.g., +12 V supply rails), offering lower leakage and tighter VBR tolerance than bidirectional variants. In contrast, SM6T10CA provides symmetrical clamping for AC or floating signal lines but exhibits higher reverse leakage and slightly reduced surge margin. For applications requiring polarity-aware protection with minimal standby current, SM6T10AHM3/H is preferred - especially in battery-sensitive automotive subsystems.

What is the thermal resistance of SM6T10AHM3/H, and how does it affect PCB layout?

The SM6T10AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard SMB pad layout per Vishay's recommended footprint. To maintain safe junction temperatures during repeated surge events, designers must ensure adequate copper area and avoid excessive trace length - otherwise, thermal derating becomes necessary above 25 °C ambient. The SM6T10AHM3/H's RθJA directly informs thermal design margins in compact automotive modules.