Vishay General Semiconductor - Diodes Division SM15T200A-M3/9AT

Overview

SM15T200A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 200 V standoff voltage (VWM), 210 V minimum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 μs). It clamps transients to 274 V at 5.5 A peak pulse current and operates from −65 °C to +150 °C. It protects MOSFETs and I/O lines in industrial motor drive control circuits.

For engineers reviewing the SM15T200A-M3/9AT datasheet, SM15T200A-M3/9AT pinout, SM15T200A-M3/9AT application, or SM15T200A-M3/9AT equivalent, key selection criteria include verified 200 V VWM rating, 274 V clamping voltage at IPPM, halogen-free RoHS-compliant M3 suffix, SMC package thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification eligibility via HM3 variant.

Technical Context

The SM15T200A-M3/9AT uses a glass-passivated silicon junction to achieve low inductance and fast response to transient overvoltage events. Its unidirectional polarity-marked with cathode band-enables integration into DC-biased signal or power rails where reverse conduction must be blocked.

Rated for 1500 W peak pulse power under 10/1000 μs waveform and 200 A non-repetitive forward surge current (IFSM), it sustains repeated lightning-induced or inductive-switching transients when mounted on 8.0 mm × 8.0 mm copper pads. Thermal resistance of 75 °C/W (junction-to-ambient) requires careful PCB layout for sustained 6.5 W steady-state dissipation.

Key Specifications

Pinout & Package

SM15T200A-M3/9AT is housed in SMC (DO-214AB) package: molded epoxy case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002, and MSL Level 1 rating (peak reflow 260 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ200A-E3/57T, SM15T200A-M3/9AT delivers 3.75× higher surge energy handling and superior thermal management; versus SMCJ200A-M3/867, it shares identical electrical and mechanical specs but uses Vishay's proprietary M3 halogen-free formulation and 9AT reel size optimized for flexible manufacturing runs.

Availability

SM15T200A-M3/9AT is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, halogen-free compliance, and repeatable surge immunity performance.

Supply support for SM15T200A-M3/9AT 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, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.

The SM15T Series was developed for high-energy transient suppression in harsh environments-targeting industrial automation, automotive subsystems, and infrastructure equipment where 1500 W surge capability and AEC-Q101 readiness are mandatory.

FAQ

What is the clamping voltage of SM15T200A-M3/9AT at its rated peak pulse current?

The SM15T200A-M3/9AT clamps to a maximum of 274 V when subjected to a 5.5 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T200A-M3/9AT maintains this clamping performance across its qualified operating temperature range.

Is SM15T200A-M3/9AT suitable for automotive applications?

SM15T200A-M3/9AT is halogen-free and RoHS-compliant, and its base P/NHM3 variant is AEC-Q101 qualified. While the M3/9AT suffix itself denotes commercial-grade halogen-free construction, the same die and package are used in HM3 variants-enabling direct qualification path for automotive use. System-level validation per ISO 7637-2 and ISO 16750-2 remains required, but the SM15T200A-M3/9AT provides the foundational surge robustness needed for body electronics.

What is the thermal resistance of SM15T200A-M3/9AT, and how does it affect PCB layout?

The SM15T200A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To sustain its 6.5 W steady-state power dissipation, PCB layout must allocate ≥64 mm² of 2-oz copper per pad, avoid thermal isolation, and minimize trace length between device terminals and copper planes. Derating applies above 25 °C ambient per Figure 2 in the datasheet.

Does SM15T200A-M3/9AT have bidirectional capability?

No, SM15T200A-M3/9AT is strictly unidirectional, as indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SM15T200CA). Using SM15T200A-M3/9AT on AC-coupled or bipolar signal lines would result in unintended forward conduction during negative half-cycles. For bidirectional protection, select SM15T200CA-M3/9AT or equivalent.

What is the meaning of the "M3/9AT" suffix in SM15T200A-M3/9AT?

The "M3" suffix indicates halogen-free, RoHS-compliant construction per Vishay's material standards; "9AT" specifies packaging in a 13-inch diameter plastic tape-and-reel containing 3500 units. This format supports high-speed pick-and-place assembly and aligns with IPC-7351B land pattern recommendations for SMC (DO-214AB). The SM15T200A-M3/9AT is not AEC-Q101 qualified by default-the HM3 variant is required for automotive qualification.