Vishay General Semiconductor - Diodes Division SM6T36AHM3_A/H

Overview

SM6T36AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMB (DO-214AA) package, with 34.2 V minimum breakdown voltage (V_BR), 30.8 V standoff voltage (V_WM), 49.9 V clamping voltage (V_C) at 12.0 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform - designed for robust overvoltage protection of MOSFETs, ICs, and sensor signal lines in automotive and industrial systems.

For engineers reviewing the SM6T36AHM3_A/H datasheet, SM6T36AHM3_A/H pinout, SM6T36AHM3_A/H application, or SM6T36AHM3_A/H equivalent, key selection criteria include verified clamping performance under 10/1000 μs transients, AEC-Q101 qualification status, halogen-free RoHS compliance, and SMB package thermal resistance (R_θJA = 100 °C/W) for board-level surge resilience.

Technical Context

This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology to ensure stable reverse leakage (<1.0 μA at V_WM) and low inductance for fast transient response. Its 150 °C maximum junction temperature and MSL Level 1 rating support reflow compatibility up to 260 °C peak.

The SM6T36AHM3_A/H delivers precise voltage limiting across its specified operating range: V_BR = 34.2–37.8 V at 1.0 mA test current, V_C = 49.9 V at 12.0 A IPPM (10/1000 μs), and exhibits thermal resistance R_θJL = 20 °C/W to leads - enabling predictable power dissipation in compact PCB layouts with 0.2" × 0.2" copper pads.

Key Specifications

Pinout & Package

SMB (DO-214AA) package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band on body; no polarity marking for bidirectional variants (not applicable to SM6T36AHM3_A/H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ36A-E3/5B and SMCJ36A-HM3, the SM6T36AHM3_A/H provides optimal balance of AEC-Q101 compliance, 600 W surge capacity, and SMB footprint - making it preferred for space-constrained automotive modules requiring production-grade reliability without overspec'ing package size or cost.

Availability

SM6T36AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and lighting driver protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.

Supply support for SM6T36AHM3_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, efficiency, and application-specific optimization.

The SM6T Series was developed for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - combining low-profile SMB packaging, AEC-Q101 qualification, and consistent clamping performance across temperature and life cycle.

FAQ

What is the clamping voltage of SM6T36AHM3_A/H at its rated peak pulse current?

The SM6T36AHM3_A/H has a maximum clamping voltage (V_C) of 49.9 V at 12.0 A peak pulse current under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88385 and ensures protected circuitry remains below critical overvoltage thresholds during surge events. The SM6T36AHM3_A/H maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).

Is SM6T36AHM3_A/H qualified for automotive applications?

Yes, SM6T36AHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM6T series datasheet (Rev. 09-Jan-2024, Doc. #88385). It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress testing (HAST) to meet automotive reliability requirements. The SM6T36AHM3_A/H is intended for use in engine control units, body electronics, and ADAS modules.

What does the "HM3" suffix indicate in SM6T36AHM3_A/H?

The "HM3" suffix in SM6T36AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3/M3 versions and confirms compliance with JEDEC J-STD-20 moisture sensitivity level 1 and peak reflow temperature of 260 °C. The SM6T36AHM3_A/H meets Vishay's material categorization per doc# 99912 and supports automotive production traceability.

How does SM6T36AHM3_A/H differ from bidirectional TVS diodes like SM6T36CA?

The SM6T36AHM3_A/H is unidirectional, with polarity marked by a cathode band and designed for DC-biased protection (e.g., power rails or gate drives), whereas SM6T36CA is bidirectional and used for AC-coupled or symmetric signal lines. Their V_BR, V_WM, and V_C values differ: SM6T36AHM3_A/H has V_WM = 30.8 V and V_BR = 34.2–37.8 V, while SM6T36CA uses CA suffix and applies identical electrical specs in both directions. The SM6T36AHM3_A/H cannot substitute for SM6T36CA in AC applications without circuit redesign.

What is the thermal resistance of SM6T36AHM3_A/H, and how does it affect layout?

The SM6T36AHM3_A/H has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces effective R_θJA. For sustained power dissipation, designers must limit average power to ≤5.0 W and verify junction temperature stays below +150 °C using the SM6T36AHM3_A/H's derating curve (Fig. 2 in doc# 88385).