Vishay General Semiconductor - Diodes Division VSS8D3M15-M3/H

Overview

VSS8D3M15-M3/H from Vishay General Semiconductor is a surface-mount Trench MOS Barrier Schottky (TMBS®) rectifier in SlimSMAW (DO-221AD) package, rated for 150 V reverse voltage, 3 A average forward current, and 60 A surge capability, with low 0.64 V forward voltage at 3 A and 125 °C - used for polarity protection and freewheeling in automotive DC/DC converters.

For engineers reviewing the VSS8D3M15-M3/H datasheet, VSS8D3M15-M3/H pinout, VSS8D3M15-M3/H application, or VSS8D3M15-M3/H equivalent, key selection criteria include junction temperature range (–40 to +175 °C), thermal resistance (R_θJA = 120 °C/W), AEC-Q101 qualification eligibility (via HM3 suffix), and halogen-free RoHS compliance.

Technical Context

This TMBS® rectifier uses trench MOS barrier technology to achieve lower forward voltage and higher temperature operation than conventional Schottky diodes. Its single-diode configuration, slim DO-221AD outline, and matte tin-plated terminals support high-density PCB layouts in thermally constrained environments.

Designed for high-frequency switching applications, it delivers stable reverse leakage (< 1.0 mA at 150 V, 125 °C) and low junction capacitance (190 pF at 4.0 V), enabling efficient operation in DC/DC converters up to several hundred kHz without excessive switching losses.

Key Specifications

Pinout & Package

Package: SlimSMAW (DO-221AD), low-profile surface-mount case with cathode band marking; compatible with SOD-128 footprint but optimized for improved thermal dissipation and reduced height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with VSS8D3M15HM3/H and SS3H15, the VSS8D3M15-M3/H offers the best balance of low-profile packaging, thermal performance, and commercial-grade compliance - making it ideal for space-constrained industrial power supplies where AEC-Q101 is not required.

Availability

VSS8D3M15-M3/H is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial freewheeling circuits, and commercial polarity protection requiring stable component supply and long-term manufacturability.

Supply support for VSS8D3M15-M3/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 optoelectronics with emphasis on reliability, thermal performance, and application-specific optimization.

The VSS8D3M15-M3/H belongs to Vishay's eSMP® Series of ultra-low-profile surface-mount rectifiers, engineered for high-efficiency power conversion in thermally demanding and space-constrained applications.

FAQ

What is the maximum junction temperature rating for the VSS8D3M15-M3/H?

The VSS8D3M15-M3/H has a maximum operating junction temperature of +175 °C, enabling reliable operation in high-ambient environments such as under-hood automotive locations or enclosed industrial enclosures. This rating is validated per JEDEC standards and supported by its TMBS® trench structure, which maintains low forward voltage even at elevated temperatures. The VSS8D3M15-M3/H must be mounted on the recommended copper pad area to achieve thermal performance consistent with datasheet derating curves.

Is the VSS8D3M15-M3/H AEC-Q101 qualified?

No, the VSS8D3M15-M3/H is the commercial-grade version. AEC-Q101 qualification applies only to the VSS8D3M15HM3/H variant, which carries the HM3 suffix and undergoes additional stress testing per the AEC-Q101 standard. The VSS8D3M15-M3/H shares identical electrical and thermal specifications but lacks automotive qualification documentation and PPAP support. For production automotive designs, specify VSS8D3M15HM3/H instead of VSS8D3M15-M3/H.

What does the "-M3/H" suffix mean in VSS8D3M15-M3/H?

The "-M3" suffix indicates halogen-free, RoHS-compliant, commercial-grade construction per Vishay's material categorization standard; "/H" specifies packaging in 7-inch plastic tape-and-reel format with 3500 units per reel. This ordering code confirms the device meets environmental compliance requirements and is supplied in standard SMT-compatible packaging. The VSS8D3M15-M3/H is not interchangeable with HM3-suffix variants unless AEC-Q101 qualification is explicitly waived in the design.

How does the SlimSMAW (DO-221AD) package compare to standard SMA?

The SlimSMAW (DO-221AD) package of the VSS8D3M15-M3/H is 30 % lower in height than standard SMA while maintaining compatibility with SOD-128 footprint dimensions. It features enhanced thermal conductivity via optimized internal die attach and exposed metal terminals, yielding R_θJA = 120 °C/W versus ~180 °C/W for typical SMA-packaged Schottkys. The VSS8D3M15-M3/H achieves this without requiring PCB redesign, supporting drop-in replacement in many existing layouts where height clearance is critical.

What is the typical forward voltage of VSS8D3M15-M3/H at 3 A and 125 °C?

The typical forward voltage of the VSS8D3M15-M3/H is 0.64 V at 3 A and 125 °C, as specified in the Vishay datasheet (Document Number: 87440). This value reflects the advantage of its TMBS® trench architecture over conventional Schottky diodes, which typically exceed 0.8 V under identical conditions. At room temperature, V_F rises to 1.04–1.12 V at 3 A, confirming strong temperature coefficient behavior that improves efficiency at system operating temperature. The VSS8D3M15-M3/H leverages this to reduce conduction loss in thermally loaded applications.