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Vishay General Semiconductor - Diodes Division SMF17A-M3-18
- Part No.:
- SMF17A-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF17A-M3-18.pdf
- Description:
- TVS DIODE 17VWM 27.6VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:9,540
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Product details
Overview
SMF17A-M3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient voltage suppression in high-speed data lines. It features a 17 V stand-off voltage (VRWM), 27.6 V maximum clamping voltage at 7.2 A peak pulse current, and 200 W peak pulse power (10/1000 μs). It delivers ±30 kV IEC 61000-4-2 contact/air ESD immunity and supports automotive-grade reliability per AEC-Q101.
For engineers reviewing the SMF17A-M3-18 datasheet, SMF17A-M3-18 pinout, SMF17A-M3-18 application, or SMF17A-M3-18 equivalent, this device is selected for USB 2.0, HDMI, Ethernet PHY, and automotive infotainment interfaces where low clamping voltage, sub-350 pF capacitance, and robust surge handling are critical to signal integrity and system-level ESD compliance.
Technical Context
This unidirectional TVS diode operates as a reverse-biased clamp, activating only when reverse voltage exceeds its 17 V stand-off threshold. Its low incremental surge resistance ensures rapid voltage limiting during transients, while its "Low Noise" technology enables response times under 1 ns - essential for protecting gigabit-speed interfaces without signal distortion.
The device uses silicon avalanche junction design with optimized doping and geometry to achieve stable breakdown at 18.9–20.9 V (VBR min/max), tight tolerance on VRWM (±0%), and low leakage (<0.1 μA at VRWM). It is qualified to AEC-Q101 for automotive under-hood and infotainment applications, with operating temperature range of –65 °C to +175 °C and MSL Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 17 V - Maximum continuous reverse voltage before clamping begins; sets safe operating margin for 15 V nominal bus systems. |
| Breakdown Voltage (VBR) | 18.9–20.9 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above VRWM with minimal overvoltage margin. |
| Clamping Voltage (VC) | 27.6 V at 7.2 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| Peak Pulse Power (PPP) | 200 W (10/1000 μs) - Sustains short-duration surges common in IEC 61000-4-5 testing without degradation. |
| Capacitance (CD) | 324 pF at 0 V, 1 MHz - Measured junction capacitance; low enough for USB 2.0 (480 Mbps) and CAN FD signal integrity. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Full-system ESD robustness without external shielding or layout mitigation. |
| Operating Temp Range | –65 °C to +175 °C - Validated performance across automotive under-hood and industrial ambient extremes. |
Pinout & Package
SMF17A-M3-18 is housed in the DO-219AB (SMF) package: low-profile (1.08 mm max height), SOD-123W-compatible outline, molded in UL 94 V-0 compound, with cathode indicated by a bar marking on the top surface. The device has two terminals: anode and cathode - no internal connections or multi-pin configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to signal line or power rail being protected; referenced to system ground via cathode path during clamping. |
| Cathode | Ground reference terminal | Connected to system ground plane; provides low-impedance discharge path for ESD/surge energy into ground. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 surge events up to 1 A on 50 Ω lines without derating. |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for secondary board-level ESD structures in consumer and automotive touch/display interfaces. |
| AEC-Q101 qualification | Validated for automotive use including engine control units, ADAS camera links, and infotainment displays. |
| 324 pF capacitance at 0 V | Preserves signal rise/fall times in USB 2.0 and LVDS applications without measurable jitter or attenuation. |
| Low-profile DO-219AB package | Enables placement adjacent to connectors and high-density BGA ICs without mechanical interference or thermal shadowing. |
Applications
| USB 2.0 Data Lines | HDMI DDC/CEC Channels |
|---|---|
Use Scenario: Protecting differential USB 2.0 D+/D− lines from ESD events during hot-plug insertion and cable handling. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between each data line and chassis ground. Use Value: Clamps transients to ≤27.6 V within <1 ns, preserving eye diagram integrity and preventing PHY latch-up at 480 Mbps. |
Use Scenario: Safeguarding HDMI DDC (I²C) and CEC control channels against electrostatic discharge in home theater receivers and display panels. IC Role / Device Role / Timing Role: Standoff-rated TVS diode connected between SDA/SCL lines and ground, operating below 5 V logic thresholds. Use Value: Maintains <0.1 μA leakage at 5 V, ensuring I²C pull-up integrity and avoiding bus timeout errors during standby. |
| Automotive Camera Serial Link | Industrial CAN FD Transceiver Interface |
Use Scenario: Shielding GMSL or FPD-Link III serializer/deserializer interfaces in rear-view and surround-view camera modules. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on high-speed serial pairs, positioned immediately after connector entry. Use Value: 324 pF capacitance avoids signal integrity loss at >1.5 Gbps, while ±30 kV rating meets ISO 10605 requirements. |
Use Scenario: Protecting CAN FD transceiver pins (CANH/CANL) from load dump and ESD in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used in back-to-back configuration) on differential bus lines. Use Value: 27.6 V clamping prevents transceiver overvoltage failure during 12 V system surges, supporting 5 Mbps CAN FD timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/57T | Higher clamping voltage (33.2 V at 6.1 A), larger SMA (DO-214AC) package (2.3 mm height), 400 pF capacitance. | Less suitable for high-speed interfaces; better for lower-frequency power rails or industrial I/O where size and capacitance are less constrained. | Select SMAJ17A-E3/57T when board space allows larger footprint and signal bandwidth is below 100 MHz. |
| TPD2E001DRYR | Integrated dual-channel ESD array (2-line), 12 pF typical capacitance, ±8 kV HBM, not AEC-Q101 qualified. | Designed for portable electronics; lacks automotive qualification and high-energy surge capability (max 120 W PPP). | Choose TPD2E001DRYR only for non-automotive, low-power, ultra-high-speed applications like smartphone USB-C ports. |
Compared with SMAJ17A-E3/57T and TPD2E001DRYR, SMF17A-M3-18 uniquely balances automotive qualification, 200 W surge handling, and 324 pF capacitance - making it the optimal choice for space-constrained, high-reliability serial link protection where both speed and ruggedness are required.
Availability
SMF17A-M3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial communication gateways, and high-speed consumer interface designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant ESD protection.
Supply support for SMF17A-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 power management, sensing, and protection components with emphasis on reliability, precision, and automotive-grade validation.
The SMF series targets high-speed interface protection in automotive, industrial, and computing applications, delivering low-clamp, low-capacitance TVS solutions optimized for signal integrity and system-level EMC compliance.
FAQ
What is the clamping voltage of SMF17A-M3-18 at its rated peak pulse current?
The SMF17A-M3-18 has a maximum clamping voltage (VC) of 27.6 V when subjected to a 7.2 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuits during surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMF17A-M3-18 maintains this clamping performance across its full operating temperature range.
Is SMF17A-M3-18 qualified for automotive applications?
Yes, SMF17A-M3-18 is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, ADAS camera links, and infotainment systems. It meets stress tests for temperature cycling, humidity, mechanical shock, and ESD per the AEC-Q101 standard. The SMF17A-M3-18 also supports operating temperatures from –65 °C to +175 °C and is packaged in a moisture-sensitive level 1 (MSL 1) DO-219AB case, enabling robust reflow assembly in automotive manufacturing environments.
What is the capacitance of SMF17A-M3-18 and how does it affect high-speed signal lines?
The SMF17A-M3-18 exhibits a typical junction capacitance of 324 pF at 0 V and 1 MHz. This value is low enough to avoid significant signal degradation on USB 2.0 (480 Mbps), HDMI DDC, and CAN FD buses, where excessive capacitance would distort edge rates or cause reflections. At higher frequencies, capacitance decreases with applied reverse bias - further minimizing loading effects. The SMF17A-M3-18's capacitance is verified per JEDEC standards and published in Vishay's official datasheet revision 2.4.
How does SMF17A-M3-18 compare to SMF18A-M3-18 in terms of voltage ratings?
SMF17A-M3-18 has a stand-off voltage (VRWM) of 17 V and breakdown voltage range of 18.9–20.9 V, whereas SMF18A-M3-18 specifies VRWM = 18 V and VBR = 20–22.3 V. The 1 V difference in VRWM makes SMF17A-M3-18 appropriate for 15 V nominal systems requiring tighter margin, while SMF18A-M3-18 suits 16–18 V rails. Both share identical package, clamping behavior, and ESD rating - but their voltage thresholds are not interchangeable without verifying system overvoltage headroom. The SMF17A-M3-18 remains distinct in its precise 17 V standoff specification.
Can SMF17A-M3-18 be used in bidirectional protection configurations?
SMF17A-M3-18 is a unidirectional TVS diode and is not inherently bidirectional; however, it can be deployed in a back-to-back configuration (two devices anode-to-anode) to provide symmetrical clamping for AC-coupled or differential lines such as CAN FD or RS-485. In that arrangement, each SMF17A-M3-18 handles one polarity of transient. This method preserves the device's 27.6 V clamping performance and 324 pF capacitance per leg - unlike integrated bidirectional parts that often trade off capacitance or clamping voltage. The SMF17A-M3-18's DO-219AB package supports dense placement for such dual-device layouts.
SMF17A-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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 7.2A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 324pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF17A-M3-18 FAQ
1.How can I place an order for SMF17A-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF17A-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 SMF17A-M3-18 reliable?
The price and inventory of SMF17A-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 SMF17A-M3-18 is usually 5 days.
3.What payment methods are accepted for SMF17A-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF17A-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF17A-M3-18?
SMF17A-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF17A-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 SMF17A-M3-18?
For technical support, including SMF17A-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF17A-M3-18 requirements.
6.How does Aetrix verify that SMF17A-M3-18 is sourced from the original manufacturer or authorized distributors?
All SMF17A-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 SMF17A-M3-18 meets industry standards.
7.What is the process for return or replacement of SMF17A-M3-18?
All SMF17A-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF17A-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 SMF17A-M3-18 part is unused and in its original packaging.
Return procedure for SMF17A-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF17A-M3-18 Tags
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