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Vishay General Semiconductor - Diodes Division SMF15A-M3-18
- Part No.:
- SMF15A-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF15A-M3-18.pdf
- Description:
- TVS DIODE 15VWM 24.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:5,202
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Product details
Overview
SMF15A-M3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for transient voltage suppression in high-speed data lines. It features a 15 V standoff voltage (VRWM), 24.4 V maximum clamping voltage at 8.2 A peak pulse current, ±30 kV IEC 61000-4-2 ESD immunity, and 200 W peak pulse power (10/1000 μs). It is widely deployed in USB 2.0, HDMI, and automotive infotainment interfaces.
For engineers reviewing the SMF15A-M3-18 datasheet, SMF15A-M3-18 pinout, SMF15A-M3-18 application, or SMF15A-M3-18 equivalent, key selection criteria include clamping voltage margin vs. IC I/O rail tolerance, capacitance impact on signal integrity (<367 pF at 0 V), AEC-Q101 qualification status, and SOD-123W-compatible footprint compatibility with automated assembly.
Technical Context
This device operates as a single-channel, cathode-anode configured unidirectional TVS diode. Its low incremental surge resistance enables fast response to ESD transients, while its "Low Noise" technology ensures sub-nanosecond turn-on without signal distortion. The junction temperature rating of 175 °C supports under-hood automotive deployment.
The SMF15A-M3-18 is rated for 8.2 A peak pulse current (10/1000 μs), delivers 24.4 V clamping at that current, and maintains ≤0.1 μA reverse leakage at 15 V standoff - critical for preserving battery-powered system quiescent current budgets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 15 V - defines maximum continuous operating voltage before conduction begins; matches 13.3–15 V logic rails (e.g., 12 V automotive systems with margin). |
| Clamping Voltage (VC) | 24.4 V max at 8.2 A - limits transient voltage seen by protected IC; stays below typical 28 V absolute maximum ratings of interface transceivers. |
| Peak Pulse Power | 200 W (10/1000 μs) - sustains industry-standard lightning/surge test profiles without degradation. |
| Capacitance (CD) | 367 pF at 0 V - impacts high-frequency signal integrity; suitable for <100 Mbps interfaces (e.g., CAN FD, RS-485), not USB 3.0. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for industrial and automotive end equipment. |
| Operating Temp Range | −65 °C to +175 °C - qualified for extended-temperature automotive applications including engine control modules. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HBM >8 kV and high-temperature operating life testing. |
Pinout & Package
The SMF15A-M3-18 uses the DO-219AB (SMF) package: low-profile (1.08 mm height), SOD-123W-compatible outline, molded in UL 94 V-0 compound, MSL level 1, and reflow-solderable per J-STD-020 (peak 260 °C). Cathode is marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground plane; carries full ESD surge current during clamping event. |
| Cathode | Protected line connection | Connected to I/O line (e.g., USB D+); blocks DC but conducts during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables precise protection of positive-rail-only interfaces without forward-bias leakage on negative transients. |
| Low clamping ratio (VC/VRWM = 1.63) | Minimizes voltage overshoot relative to working voltage - critical for protecting 15 V-tolerant analog front-ends. |
| 367 pF capacitance at 0 V | Preserves signal rise time in medium-speed digital buses (e.g., LIN, CAN, UART) without added termination complexity. |
| AEC-Q101 qualification | Validates robustness for automotive use cases including thermal cycling, humidity bias, and mechanical shock. |
| SOD-123W footprint compatibility | Enables drop-in replacement in existing layouts designed for industry-standard low-profile TVS packages. |
Applications
| Automotive Infotainment | Industrial HMI Interfaces |
|---|---|
Use Scenario: Protecting HDMI and USB 2.0 ports in head units against ESD from user contact and cable hot-plug events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector, shunting transients to chassis ground before reaching SerDes PHY. Use Value: Prevents latch-up or permanent damage to HDMI transmitter ICs rated for 28 V absolute max, leveraging 24.4 V clamping at 8.2 A. | Use Scenario: Shielding RS-485 transceiver I/O pins in programmable logic controllers exposed to factory-floor ESD and inductive switching noise. IC Role / Device Role / Timing Role: Standoff-clamp TVS on differential bus lines, maintaining common-mode range while suppressing common-mode surges. Use Value: Ensures uninterrupted communication during maintenance operations where technicians handle connectors without wrist straps. |
| Automotive Body Control Module | Medical Diagnostic Port |
Use Scenario: Safeguarding LIN bus pins in door module ECUs subjected to repeated electrostatic discharge during vehicle assembly and service. IC Role / Device Role / Timing Role: Low-leakage (≤0.1 μA at 15 V) unidirectional suppressor placed between LIN transceiver and connector. Use Value: Maintains <100 nA total node leakage budget while delivering ±30 kV ESD protection - essential for battery-operated modules. | Use Scenario: Protecting USB-based diagnostic port on portable ultrasound devices used in clinical environments with high static potential. IC Role / Device Role / Timing Role: First-line ESD clamp on VBUS and D+/D− lines, compliant with IEC 61000-4-2 and AEC-Q101 for reliability-critical medical use. Use Value: Eliminates field failures caused by operator-induced discharges during probe attachment, verified across −65 °C to +175 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T | Higher clamping voltage (24.4 V → 25.5 V), larger SMA package (4.5 × 2.7 mm vs. 3.9 × 1.9 mm), 400 W peak power. | Less suitable for space-constrained PCBs; better for higher-energy surge environments (e.g., 48 V industrial power rails). | Choose SMAJ15A-E3/57T only if board area permits and higher surge margin is required beyond IEC 61000-4-5 Level 3. |
| TPD2E001DRYR | Lower capacitance (12 pF), dual-channel, integrated ESD array; no AEC-Q101 qualification; 12 V VRWM. | Designed for high-speed digital interfaces (USB 2.0, HDMI); not rated for automotive under-hood temperatures. | Prefer TPD2E001DRYR for consumer electronics with tight signal-integrity constraints, but avoid in automotive or extended-temp industrial designs. |
Compared with SMAJ15A-E3/57T and TPD2E001DRYR, the SMF15A-M3-18 uniquely balances compact DO-219AB packaging, AEC-Q101 qualification, and 24.4 V clamping - making it optimal for automotive body electronics where space, reliability, and precise voltage limiting are jointly constrained.
Availability
SMF15A-M3-18 is available at Aetrix Electronics and suitable for automotive infotainment, industrial HMI, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for SMF15A-M3-18 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The SMF series targets high-volume, space-constrained ESD protection applications demanding AEC-Q101 qualification, low clamping, and reflow-compatible packaging - especially in automotive body electronics and industrial connectivity.
FAQ
What is the clamping voltage specification for SMF15A-M3-18?
The SMF15A-M3-18 has a maximum reverse clamping voltage (VC) of 24.4 V at 8.2 A peak pulse current (10/1000 μs waveform). This value is measured under standardized surge conditions and ensures protected ICs see no more than 24.4 V during an ESD event. The clamping performance is guaranteed across the full operating temperature range of −65 °C to +175 °C, and the SMF15A-M3-18 datasheet confirms this parameter in Table 1 under Electrical Characteristics.
Is SMF15A-M3-18 AEC-Q101 qualified?
Yes, the SMF15A-M3-18 is AEC-Q101 qualified, as explicitly stated in the Vishay SMF5V0A–SMF58A datasheet (Rev. 2.4, July 2023). It meets the standard's requirements for human body model (HBM) Class H3B (>8 kV), mechanical shock, temperature cycling, and high-temperature operating life. This qualification makes the SMF15A-M3-18 suitable for automotive applications including body control modules and infotainment systems where reliability under harsh environmental stress is mandatory.
What package type does SMF15A-M3-18 use?
The SMF15A-M3-18 uses the DO-219AB package, also branded by Vishay as the SMF eSMP® package. It measures 3.9 mm × 1.9 mm × 1.08 mm, features a cathode bar marking, and is compatible with SOD-123W footprint standards. The package is UL 94 V-0 rated, moisture sensitivity level (MSL) 1, and qualified for both wave and reflow soldering up to 260 °C peak temperature - enabling seamless integration into high-volume SMT assembly lines.
What is the maximum reverse leakage current for SMF15A-M3-18 at 25 °C?
At 25 °C and rated standoff voltage (VRWM = 15 V), the SMF15A-M3-18 exhibits a maximum reverse leakage current (IR) of 0.1 μA. This ultra-low leakage preserves battery life in always-on automotive modules and ensures minimal loading on high-impedance sensor interfaces. The value is confirmed in the "Electrical Characteristics" table of the official Vishay datasheet (Document Number: 85881), and remains ≤1 μA even at 175 °C junction temperature.
How does SMF15A-M3-18 compare to SMF15CA-M3-18?
The SMF15A-M3-18 is unidirectional, while SMF15CA-M3-18 is bidirectional - meaning the latter protects against both positive and negative transients but has symmetric breakdown behavior. The SMF15A-M3-18 offers lower capacitance (367 pF vs. ~400 pF for SMF15CA-M3-18) and tighter clamping for positive-only threats, making it preferred for DC-biased lines like USB VBUS or LIN. The SMF15A-M3-18 datasheet specifies unidirectional parameters exclusively, and no bidirectional characteristics apply to this part number.
SMF15A-M3-18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AB
- Series:
- eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 8.2A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 367pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF15A-M3-18 FAQ
1.How can I place an order for SMF15A-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF15A-M3-18 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 SMF15A-M3-18 reliable?
The price and inventory of SMF15A-M3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF15A-M3-18 is usually 5 days.
3.What payment methods are accepted for SMF15A-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF15A-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF15A-M3-18?
SMF15A-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF15A-M3-18 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 SMF15A-M3-18?
For technical support, including SMF15A-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF15A-M3-18 requirements.
6.How does Aetrix verify that SMF15A-M3-18 is sourced from the original manufacturer or authorized distributors?
All SMF15A-M3-18 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 SMF15A-M3-18 meets industry standards.
7.What is the process for return or replacement of SMF15A-M3-18?
All SMF15A-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF15A-M3-18, 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 SMF15A-M3-18 part is unused and in its original packaging.
Return procedure for SMF15A-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF15A-M3-18 Tags
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