Vishay General Semiconductor - Diodes Division MSMP7.5A-M3/89A

Overview

MSMP7.5A-M3/89A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the MicroSMP (DO-219AD) package, featuring a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR), 150 W peak pulse power (10/1000 μs), and AEC-Q101 qualification. It protects MOSFETs and sensor signal lines against inductive switching transients and ESD in automotive and industrial control modules.

For engineers reviewing the MSMP7.5A-M3/89A datasheet, MSMP7.5A-M3/89A pinout, MSMP7.5A-M3/89A application, or MSMP7.5A-M3/89A equivalent, key selection criteria include clamping voltage (12.9 V max at 11.6 A), low-profile height (0.65 mm), unidirectional polarity, MSL Level 1 rating, and halogen-free RoHS-compliant construction.

Technical Context

This TVS diode uses an oxide planar chip junction and is optimized for fast transient suppression on low-voltage DC rails. Its unidirectional configuration provides reverse-biased clamping only, with a typical junction capacitance of ~12 pF at 0 V bias and <1 μA leakage at 7.5 V.

The device operates across -55 °C to +150 °C junction temperature and exhibits thermal resistance RθJA = 250 °C/W (free air) and RθJM = 30 °C/W (on 6.0 mm × 6.0 mm copper pads), enabling reliable performance in thermally constrained PCB layouts.

Key Specifications

Pinout & Package

MicroSMP (DO-219AD) is a two-terminal surface-mount package with cathode denoted by a color band. Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ7.5A and SMCJ7.5A, the MSMP7.5A-M3/89A delivers identical electrical protection in a 60% smaller footprint and 0.65 mm height-critical for modern automotive ECUs and miniaturized IoT nodes-while maintaining AEC-Q101 qualification and MSL Level 1 process compatibility.

Availability

MSMP7.5A-M3/89A is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, lighting control units, and consumer IoT motion sensor nodes requiring stable component supply and full traceability.

Supply support for MSMP7.5A-M3/89A 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, precision, and automotive-grade qualification.

The MSMP series belongs to Vishay's eSMP® family of ultra-low-profile TVS diodes, engineered specifically for space-constrained, high-reliability applications in automotive, industrial, and portable electronics where traditional SMA/SMC packages cannot fit.

FAQ

What is the maximum clamping voltage of the MSMP7.5A-M3/89A at its rated peak pulse current?

The MSMP7.5A-M3/89A has a maximum clamping voltage (V_CL) of 12.9 V at 11.6 A peak pulse current (10/1000 μs waveform). This value is measured under standardized surge conditions and ensures downstream ICs see no more than 12.9 V during transient events, protecting 3.3 V or 5 V logic interfaces from overvoltage damage. The MSMP7.5A-M3/89A achieves this with a dynamic resistance (R_D) of 0.317 Ω.

Is the MSMP7.5A-M3/89A suitable for automotive applications?

Yes, the MSMP7.5A-M3/89A is AEC-Q101 qualified and designed for automotive use. It meets stringent stress tests including HBM ESD (>8 kV contact), thermal cycling, and high-temperature operating life. Its MicroSMP package supports automated placement in engine bay and cabin modules, and its 150 °C maximum junction temperature aligns with under-hood thermal requirements. The MSMP7.5A-M3/89A is commonly deployed in BCMs, lighting controllers, and sensor hubs.

What does the "M3/89A" suffix indicate in MSMP7.5A-M3/89A?

The "M3" suffix denotes halogen-free, RoHS-compliant, commercial-grade construction with JESD 201 Class 2 whisker resistance. The "/89A" identifies the preferred tape-and-reel packaging: 7-inch diameter plastic tape, 4500 units per reel, with 0.006 g unit weight. This packaging format ensures compatibility with high-speed pick-and-place equipment and satisfies Vishay's standard logistics coding for the MicroSMP platform. The MSMP7.5A-M3/89A is not AEC-Q101 qualified-only HM3 variants carry that designation.

How does the MSMP7.5A-M3/89A compare to bidirectional TVS diodes in signal-line protection?

The MSMP7.5A-M3/89A is unidirectional and optimized for DC-biased lines like power rails or single-ended digital signals referenced to ground. Unlike bidirectional TVS diodes-which clamp both polarities and exhibit higher capacitance-the MSMP7.5A-M3/89A offers lower junction capacitance (~12 pF) and tighter VBR tolerance, making it preferable for high-speed or low-leakage applications. For AC-coupled or floating lines, a bidirectional variant would be required; the MSMP7.5A-M3/89A is not suitable in those cases.

What is the thermal resistance of the MSMP7.5A-M3/89A under standard mounting conditions?

The MSMP7.5A-M3/89A has a typical junction-to-ambient thermal resistance (R_θJA) of 250 °C/W when mounted on minimum recommended pad area in free air, and 30 °C/W junction-to-mount (R_θJM) when soldered to 6.0 mm × 6.0 mm copper pads per terminal. These values define its steady-state power dissipation limit (0.5 W at T_A = 25 °C) and transient thermal response. Proper PCB copper area is essential to maintain reliability during repetitive surge events. The MSMP7.5A-M3/89A must be routed with adequate thermal relief to avoid exceeding 150 °C T_J.