Vishay General Semiconductor - Diodes Division SM6T200AHM3_A/I

Overview

SM6T200AHM3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 171 V stand-off voltage (V_WM), 190–210 V breakdown voltage (V_BR), and 600 W peak pulse power (10/1000 μs). It clamps transients to ≤274 V at 2.2 A and operates from −65 °C to +150 °C, designed for automotive-grade ESD and surge protection on power rails and signal lines.

For engineers reviewing the SM6T200AHM3_A/I datasheet, SM6T200AHM3_A/I pinout, SM6T200AHM3_A/I application, or SM6T200AHM3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS compliance, low-inductance SMB package, and verified clamping performance under IEC 61000-4-5 surge conditions.

Technical Context

This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) to voltage transients and stable clamping across temperature. Its unidirectional polarity enables integration into DC power supply rails where reverse conduction must be blocked.

The device meets J-STD-020 MSL Level 1 (260 °C reflow peak), supports 100 A non-repetitive forward surge current (IFSM), and exhibits 100 °C/W junction-to-ambient thermal resistance when mounted on 5.0 mm × 5.0 mm copper pads - critical for sustained surge handling in compact automotive modules.

Key Specifications

Pinout & Package

SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, 5.59 mm × 4.06 mm body, 2.20 mm height, cathode band marking on unidirectional devices. Complies with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ200A-E3/5B and 1.5SMC200A, SM6T200AHM3_A/I delivers optimal balance of automotive qualification, compact SMB footprint, and 600 W surge capacity - making it the preferred choice for next-gen ADAS domain controllers and electrified chassis modules where board space and reliability are co-constrained.

Availability

SM6T200AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power feeds, and consumer appliance motor drives requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SM6T200AHM3_A/I 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 vertical manufacturing control and AEC-Q101 validation capability.

The SM6T Series was engineered specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing low clamping voltage, repeatable surge endurance, and compatibility with modern lead-free assembly processes.

FAQ

What is the clamping voltage of SM6T200AHM3_A/I at its rated peak pulse current?

The SM6T200AHM3_A/I has a maximum clamping voltage (V_C) of 274 V at 2.2 A peak pulse current (I_PPM) under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 88385 and defines the upper voltage limit imposed on protected circuits during surge events. The SM6T200AHM3_A/I maintains this clamping performance across its full operating temperature range (−65 °C to +150 °C).

Is SM6T200AHM3_A/I suitable for automotive applications?

Yes, SM6T200AHM3_A/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - meeting stringent automotive reliability requirements for powertrain, body, and ADAS systems. Its HM3 suffix explicitly denotes AEC-Q101 qualification, and the device undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and ESD per JESD22-A114. SM6T200AHM3_A/I is approved for use in under-hood and cabin modules where ambient temperatures reach +125 °C.

What does the "HM3" suffix mean in SM6T200AHM3_A/I?

The "HM3" suffix in SM6T200AHM3_A/I indicates halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. Per Vishay's ordering nomenclature, HM3 denotes the automotive-grade variant - distinct from commercial-grade M3 (halogen-free, RoHS, no AEC-Q101) and E3 (RoHS, no halogen-free or AEC-Q101). The "_A/I" denotes revision A in 13-inch tape-and-reel packaging (3200 units per reel), confirming full production release status for SM6T200AHM3_A/I.

How does SM6T200AHM3_A/I compare to SM6T200AHE3_B/I?

SM6T200AHM3_A/I and SM6T200AHE3_B/I share identical electrical specifications (V_WM, V_BR, V_C, P_PPM) and package (SMB), but differ in material compliance: HM3 is halogen-free and AEC-Q101 qualified, while HE3 is RoHS-compliant and AEC-Q101 qualified but contains halogens. The "_A/I" vs "_B/I" denotes different revision codes and reel sizes - both are 13-inch reels (3200 units), but revision A supersedes revision B. SM6T200AHM3_A/I is the preferred choice for OEMs enforcing halogen-free supply chain mandates.

What is the thermal resistance of SM6T200AHM3_A/I, and how does it affect layout design?

SM6T200AHM3_A/I 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 internal ground planes reduces R_θJA and improves surge survivability. For continuous 5.0 W power dissipation (P_D), layout must ensure T_J stays below 150 °C - requiring ≤100 °C rise above ambient, so SM6T200AHM3_A/I should be placed away from heat sources and adjacent to thermal vias in high-power applications.