Vishay General Semiconductor - Diodes Division MSMP17A-M3/89A

Overview

MSMP17A-M3/89A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the MicroSMP (DO-219AD) package, designed for clamping transient overvoltages on signal and power lines. It features a 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR), 150 W peak pulse power (10/1000 μs), 27.6 V maximum clamping voltage at 5.4 A IPPM, and AEC-Q101 qualification for automotive electronics protection.

For engineers reviewing the MSMP17A-M3/89A datasheet, MSMP17A-M3/89A pinout, MSMP17A-M3/89A application, or MSMP17A-M3/89A equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity compatibility with DC-biased lines, MicroSMP footprint constraints, and AEC-Q101 compliance for automotive-grade ESD and load-dump immunity.

Technical Context

This TVS diode uses an oxide planar chip junction and operates exclusively in unidirectional mode, with cathode denoted by a color band. Its low-profile construction (0.65 mm typical height) supports automated SMT placement and meets J-STD-020C MSL Level 1 with 260 °C reflow peak.

Thermal performance is defined by RθJA = 250 °C/W (free air) and RθJM = 30 °C/W (on 6.0 mm × 6.0 mm copper pads). It delivers 15 kV air-gap and 8 kV contact-mode ESD protection per IEC 61000-4-2 and AEC-Q101-001 H3B class, with junction temperature range from –55 °C to +150 °C.

Key Specifications

Pinout & Package

MicroSMP (DO-219AD) is a two-terminal surface-mount package with cathode identified by a visible color band. The device has no internal leads; 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 voltage suppression applications.

Compared with SMAJ17A and SMF17A, the MSMP17A-M3/89A offers the smallest footprint and lowest profile among 17 V unidirectional TVS diodes, enabling miniaturized designs without sacrificing AEC-Q101 qualification or 150 W surge capability-critical for next-generation ADAS sensor nodes and compact ECUs.

Availability

MSMP17A-M3/89A is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus protection, and industrial I/O modules requiring stable component supply, AEC-Q101 compliance, and high-density SMT integration.

Supply support for MSMP17A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The MSMP series belongs to Vishay's eSMP® family of ultra-low-profile TVS diodes, engineered specifically for space-constrained automotive and industrial applications demanding AEC-Q101 qualification and robust transient immunity in MicroSMP packaging.

FAQ

What is the clamping voltage of the MSMP17A-M3/89A at its rated peak pulse current?

The MSMP17A-M3/89A has a maximum clamping voltage (V_CL) of 27.6 V at a peak pulse current (I_PPM) of 5.4 A under the standard 10/1000 μs waveform. This value is measured per the test conditions specified in Vishay's datasheet document 89457 and reflects worst-case voltage seen by downstream circuitry during surge events. The MSMP17A-M3/89A maintains this clamping performance across its full operating temperature range.

Is the MSMP17A-M3/89A suitable for automotive applications?

Yes, the MSMP17A-M3/89A is AEC-Q101 qualified, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its 15 kV air-gap and 8 kV contact ESD ratings, wide operating temperature range (–55 °C to +150 °C), and robust 150 W surge capability meet stringent automotive reliability requirements. The MSMP17A-M3/89A is explicitly listed in Vishay's qualified parts list for AEC-Q101.

What does the "M3/89A" suffix indicate in MSMP17A-M3/89A?

The "M3" suffix denotes halogen-free, RoHS-compliant, commercial-grade construction with matte tin-plated terminals meeting JESD 201 Class 2 whisker resistance. The "89A" refers to the preferred tape-and-reel packaging code: 7-inch diameter plastic tape, 4500 units per reel. This packaging format ensures compatibility with high-speed pick-and-place equipment and is documented in Vishay's ordering information table for the MSMP17A-M3/89A.

How does the MicroSMP package of the MSMP17A-M3/89A compare to SMA or SOD-123FL in terms of board space?

The MicroSMP (DO-219AD) package of the MSMP17A-M3/89A measures 2.70 mm × 1.40 mm with 0.65 mm height-up to 50% smaller footprint than SMA (DO-214AC) and ~30% smaller than SOD-123FL (DO-219AB). This enables tighter routing in high-pin-count connectors and multi-sensor modules. The MSMP17A-M3/89A achieves this miniaturization without compromising surge rating, unlike similarly sized alternatives with lower PPPM.

Does the MSMP17A-M3/89A have polarity markings, and how is it oriented on the PCB?

Yes, the MSMP17A-M3/89A features a visible cathode band on the top surface, aligned with the cathode terminal. Per Vishay's mechanical drawings, the cathode end corresponds to the side with the marking band, and the anode is the opposite terminal. Correct orientation is critical because the MSMP17A-M3/89A is unidirectional; reversing it would prevent clamping during positive transients. The MSMP17A-M3/89A must be placed with the band aligned to the protected line (e.g., CAN_H or sensor V_OUT).