Vishay General Semiconductor - Diodes Division SMA5J10AHM3_A/H

Overview

SMA5J10AHM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 10 V stand-off voltage (V_WM), 11.1–12.3 V breakdown voltage (V_BR), 17.0 V clamping voltage (V_C) at 29.4 A peak pulse current, and 500 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.

For engineers reviewing the SMA5J10AHM3_A/H datasheet, SMA5J10AHM3_A/H pinout, SMA5J10AHM3_A/H application, or SMA5J10AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (R_θJA = 80 °C/W), and junction temperature range (−55 °C to +150 °C).

Technical Context

This TVS diode operates as a clamping device that remains high-impedance below V_WM = 10 V and rapidly transitions to low-impedance conduction above V_BR = 11.1–12.3 V to limit transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports automated placement and meets MSL level 1 (260 °C reflow peak).

The device is rated for 500 W peak pulse power (10/1000 μs), 40 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits low incremental surge resistance - critical for maintaining low clamping voltage under high-current transients such as load dump or inductive switching events.

Key Specifications

Pinout & Package

Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional types.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMA5J10AHE3_A/H and SMA6J10A-M3, the SMA5J10AHM3_A/H uniquely combines halogen-free construction, AEC-Q101 qualification, and precise 10 V stand-off - making it the preferred choice for next-generation automotive modules requiring both environmental compliance and validated reliability.

Availability

SMA5J10AHM3_A/H is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O protection, and DC-DC converter input stages requiring stable component supply with full traceability and lifecycle continuity.

Supply support for SMA5J10AHM3_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, TVS devices, and optoelectronics with emphasis on reliability, power density, and automotive-grade qualification.

The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial power systems where robustness and AEC-Q101 validation are mandatory.

FAQ

What is the clamping voltage of the SMA5J10AHM3_A/H under maximum rated surge conditions?

The SMA5J10AHM3_A/H has a maximum clamping voltage (V_C) of 17.0 V when subjected to its rated peak pulse current of 29.4 A using the standard 10/1000 μs waveform. This value is measured at the device terminals under specified test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMA5J10AHM3_A/H maintains this clamping performance across its qualified operating temperature range.

Is the SMA5J10AHM3_A/H suitable for automotive applications requiring AEC-Q101 qualification?

Yes, the SMA5J10AHM3_A/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation (Document Number: 88875). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its suitability for under-hood and cabin automotive systems. The SMA5J10AHM3_A/H meets all requirements for use in automotive power distribution and sensor interface designs.

What does the "HM3" suffix in SMA5J10AHM3_A/H indicate?

The "HM3" suffix in SMA5J10AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. "H" identifies the halogen-free material set, "M3" specifies the RoHS-compliant commercial grade, and the "_A/H" revision code indicates manufacturing lot and process version. This distinguishes it from non-halogen-free variants like HE3 and confirms compliance with strict environmental mandates in Tier 1 automotive supply chains.

How does the thermal resistance of SMA5J10AHM3_A/H affect its derating in real-world layouts?

The SMA5J10AHM3_A/H has a typical junction-to-ambient thermal resistance (R_θJA) of 80 °C/W when mounted on 0.2" x 0.2" copper pads per terminal. In practice, this means power dissipation must be reduced by approximately 1.25% per °C above 25 °C ambient - for example, at 85 °C ambient, only ~25% of the 500 W rating remains usable. Layout enhancements (larger copper areas, internal planes) can improve heat spreading and reduce effective R_θJA.

Can SMA5J10AHM3_A/H replace SMA5J10A-E3/61 in an existing design?

The SMA5J10AHM3_A/H is not a direct drop-in replacement for SMA5J10A-E3/61 due to differences in material content and qualification: SMA5J10AHM3_A/H is halogen-free and AEC-Q101 qualified, whereas SMA5J10A-E3/61 is RoHS-compliant but not halogen-free nor automotive-qualified. Electrical parameters match, but mechanical and reliability profiles differ - redesign validation is required if substituting into automotive or halogen-free-mandated applications. The SMA5J10AHM3_A/H should be selected only when those specific attributes are needed.