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Vishay General Semiconductor - Diodes Division MSMP18A-M3/89A
- Part No.:
- MSMP18A-M3/89A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AD
- Datasheet:
-
MSMP18A-M3/89A.pdf
- Description:
- TVS DIODE 18VWM 29.2VC MICROSMP
- Quantity:
- Payment:
- Shipping:
Inventory:7,041
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Product details
Overview
MSMP18A-M3/89A from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in MicroSMP (DO-219AD) package, with breakdown voltage 20.0–22.1 V, stand-off voltage 18 V, peak pulse power 150 W (10/1000 μs), and AEC-Q101 qualification. It protects automotive sensor signal lines and MOSFET gates against ESD and inductive switching transients.
For engineers reviewing the MSMP18A-M3/89A datasheet, MSMP18A-M3/89A pinout, MSMP18A-M3/89A application, or MSMP18A-M3/89A equivalent, key selection criteria include clamping voltage (29.2 V max at 5.1 A), junction temperature range (−55 °C to +150 °C), ESD rating (15 kV air / 8 kV contact), and MicroSMP footprint compatibility with automated SMT assembly.
Technical Context
This device operates as a unidirectional avalanche diode for transient overvoltage suppression, leveraging oxide planar chip junction technology and a low-profile MicroSMP package optimized for high-density PCB layouts. Its clamping behavior follows VCL = RD × IPPM + VBR(max), with dynamic resistance of 1.382 Ω at 10/1000 μs waveform.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and achieves MSL Level 1 per J-STD-020C with peak reflow temperature up to 260 °C. Thermal resistance is 30 °C/W junction-to-mount when soldered on 6.0 mm × 6.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 20.0–22.1 V at 1.0 mA - defines minimum voltage at which avalanche conduction begins reliably |
| Stand-off Voltage (VWM) | 18 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA |
| Peak Pulse Power (PPPM) | 150 W (10/1000 μs) - surge energy handling capacity under standard lightning transient waveform |
| Clamping Voltage (VCL) | 29.2 V max at 5.1 A - maximum voltage seen by protected circuit during specified surge current |
| Dynamic Resistance (RD) | 1.382 Ω - determines voltage rise slope during transient, critical for low-voltage IC protection |
| ESD Rating | 15 kV (air), 8 kV (contact) per IEC 61000-4-2 - ensures robustness against system-level electrostatic discharge events |
| Junction Temp Range | −55 °C to +150 °C - supports operation in under-hood automotive environments and industrial enclosures |
Pinout & Package
Package: MicroSMP (DO-219AD), ultra-low-profile surface-mount case with matte tin-plated terminals, 0.65 mm typical height, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-impedance return path in unidirectional TVS configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line; color band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| MicroSMP (DO-219AD) footprint | Enables high-density placement and compatibility with standard 0201-class pick-and-place equipment |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| 150 W peak pulse power | Provides margin against ISO 7637-2 pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events |
| Low clamping ratio (VCL/VBR ≈ 1.46) | Minimizes overvoltage stress on downstream 18–24 V-rated components such as CAN transceivers and LIN drivers |
| Halogen-free, RoHS-compliant, MSL Level 1 | Supports lead-free reflow processes without moisture sensitivity concerns or environmental compliance risk |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and ground to clamp transients induced by nearby solenoid switching. Use Value: Limits voltage excursion to ≤29.2 V during 5.1 A surges, preserving accuracy and longevity of 24 V rail-tolerant op-amps and ADC inputs. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to field wiring noise and relay coil kickback. IC Role / Device Role / Timing Role: Standoff-connected TVS on 24 V DC input lines, absorbing repetitive inductive spikes without degradation. Use Value: Withstands >100,000 surge events at 50% rated power due to low thermal resistance (30 °C/W) and stable oxide planar junction. |
| Automotive Body Control Module | Consumer Appliance Motor Driver Protection |
|
Use Scenario: Shielding LIN bus transceivers and LED driver outputs in door module assemblies subject to battery load dump and ESD. IC Role / Device Role / Timing Role: Low-capacitance (<18 pF at 0 V) unidirectional suppressor placed directly at connector interface. Use Value: Maintains signal integrity on 20 kbps LIN lines while suppressing 15 kV air-gap ESD per IEC 61000-4-2. |
Use Scenario: Protecting gate drive signals of N-channel MOSFETs controlling BLDC motors in smart home appliances. IC Role / Device Role / Timing Role: TVS mounted adjacent to motor driver IC output pins to clamp Miller-induced voltage spikes during fast switching. Use Value: Clamps 10/1000 μs transients to 29.2 V within 1 ns response time, preventing false turn-on and gate oxide damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/5A | DO-214AC (SMA) package, 2.5 mm height, higher RθJA (50 °C/W), same VWM/VBR range | Less suitable for ultra-thin automotive modules; better for manual repair or legacy board designs | Select when board space allows larger footprint and thermal management uses ambient convection rather than copper pad conduction |
| SMCJ18AHE3/57T | DO-214AB (SMC) package, 200 W PPPM, higher VCL (32.4 V), AEC-Q101 qualified | Higher surge margin but larger size; used where 150 W is insufficient for worst-case load dump | Choose when system-level testing requires >150 W pulse handling or when layout permits 7.11 mm × 6.22 mm footprint |
Compared with SMAJ18A-E3/5A and SMCJ18AHE3/57T, the MSMP18A-M3/89A delivers identical electrical protection performance in a 60% smaller volume and 2× lower thermal resistance to mount, making it optimal for next-generation compact automotive ECUs where board area and thermal coupling to copper are constrained.
Availability
MSMP18A-M3/89A is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and body control module design requiring stable component supply and long-term lifecycle support.
Supply support for MSMP18A-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The MSMP series was developed specifically for AEC-Q101-compliant automotive electronics, targeting space-constrained, high-reliability transient suppression in signal and power lines across engine, chassis, and infotainment systems.
FAQ
What is the maximum clamping voltage of the MSMP18A-M3/89A at its rated peak pulse current?
The MSMP18A-M3/89A has a maximum clamping voltage (VCL) of 29.2 V at 5.1 A peak pulse current under the 10/1000 μs waveform. This value is measured per the standard test condition defined in Vishay's datasheet document 89457 and reflects the actual voltage imposed on the protected circuit during surge events. The MSMP18A-M3/89A maintains this clamping performance across its full operating temperature range.
Is the MSMP18A-M3/89A suitable for use in automotive applications?
Yes, the MSMP18A-M3/89A is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, sensor interfaces, and body electronics. Its construction-oxide planar junction, halogen-free molding compound, and MSL Level 1 rating-meets stringent automotive manufacturing and reliability requirements. The MSMP18A-M3/89A is listed in Vishay's qualified automotive product portfolio under document 89457.
What package type does the MSMP18A-M3/89A use, and what are its key mechanical dimensions?
The MSMP18A-M3/89A uses the MicroSMP (DO-219AD) package, measuring 2.70 mm × 1.40 mm × 0.65 mm (L × W × H) with a cathode band marking. Its footprint matches JEDEC DO-219AD standards and features matte tin-plated terminals compatible with J-STD-002 solderability requirements. The MSMP18A-M3/89A is optimized for automated placement and reflow at 260 °C peak temperature.
How does the MSMP18A-M3/89A compare to the MSMP18AHM3/H variant?
The MSMP18A-M3/89A is commercial-grade and RoHS-compliant, while the MSMP18AHM3/H carries the HM3 suffix indicating AEC-Q101 qualification and enhanced whisker resistance (JESD 201 Class 2). Both share identical electrical specs and MicroSMP packaging, but only MSMP18AHM3/H is approved for automotive production without additional qualification. The MSMP18A-M3/89A remains valid for industrial and consumer applications where AEC-Q101 is not mandated.
What is the junction-to-mount thermal resistance (RθJM) of the MSMP18A-M3/89A, and why does it matter?
The MSMP18A-M3/89A has a typical junction-to-mount thermal resistance (RθJM) of 30 °C/W when mounted on 6.0 mm × 6.0 mm copper pads. This low value enables efficient heat transfer from the silicon die to the PCB, critical for sustaining repeated surge events without thermal runaway. For high-duty-cycle protection circuits, this parameter directly impacts long-term reliability-and the MSMP18A-M3/89A outperforms larger packages like SMAJ or SMCJ in thermal coupling efficiency.
MSMP18A-M3/89A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AD
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 5.1A
- Power - Peak Pulse:
- 150W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AD (MicroSMP)
MSMP18A-M3/89A FAQ
1.How can I place an order for MSMP18A-M3/89A through Aetrix?
Please submit a Request for Quotation (RFQ) for MSMP18A-M3/89A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MSMP18A-M3/89A reliable?
The price and inventory of MSMP18A-M3/89A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSMP18A-M3/89A is usually 5 days.
3.What payment methods are accepted for MSMP18A-M3/89A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSMP18A-M3/89A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSMP18A-M3/89A?
MSMP18A-M3/89A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSMP18A-M3/89A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MSMP18A-M3/89A?
For technical support, including MSMP18A-M3/89A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSMP18A-M3/89A requirements.
6.How does Aetrix verify that MSMP18A-M3/89A is sourced from the original manufacturer or authorized distributors?
All MSMP18A-M3/89A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSMP18A-M3/89A meets industry standards.
7.What is the process for return or replacement of MSMP18A-M3/89A?
All MSMP18A-M3/89A units undergo pre-shipment inspection (PSI). If there is an issue with MSMP18A-M3/89A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MSMP18A-M3/89A part is unused and in its original packaging.
Return procedure for MSMP18A-M3/89A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSMP18A-M3/89A Tags
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