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Vishay General Semiconductor - Diodes Division SMF11A-M3-08
- Part No.:
- SMF11A-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF11A-M3-08.pdf
- Description:
- TVS DIODE 11VWM 18.2VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:9,956
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Product details
Overview
SMF11A-M3-08 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 11 V standoff voltage (VRWM), 12.2–13.5 V reverse breakdown (VBR), 18.2 V maximum clamping voltage at 11 A peak pulse current, and 200 W peak pulse power (10/1000 μs). It delivers ±30 kV IEC 61000-4-2 ESD immunity and supports automotive-grade reliability per AEC-Q101.
For engineers reviewing the SMF11A-M3-08 datasheet, SMF11A-M3-08 pinout, SMF11A-M3-08 application, or SMF11A-M3-08 equivalent, this device is selected for robust, low-capacitance (<510 pF) overvoltage protection in USB 2.0, HDMI, Ethernet PHY interfaces, and automotive infotainment signal paths where fast response (<1 ns), low clamping, and high surge tolerance are critical.
Technical Context
The SMF11A-M3-08 operates as a unidirectional TVS diode with avalanche breakdown behavior, optimized for clamping transients before downstream ICs reach damage thresholds. Its low incremental surge resistance ensures minimal voltage overshoot during 10/1000 μs surges up to 11 A, while its "Low Noise" silicon process enables sub-nanosecond response time.
It is rated for continuous operation from –65 °C to +175 °C, qualified to AEC-Q101, and compatible with standard SOD-123W footprint layouts. The DO-219AB package provides 1.08 mm height and MSL Level 1 moisture sensitivity-enabling reflow compatibility without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 11 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working range for protected line. |
| Breakdown Voltage (VBR) | 12.2–13.5 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| Clamping Voltage (VC) | 18.2 V at IPPM = 11 A - Peak voltage seen by protected circuit under worst-case 10/1000 μs surge; limits stress on downstream ICs. |
| Peak Pulse Power | 200 W (10/1000 μs) - Sustains high-energy ESD and lightning-induced surges without failure. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Meets highest industrial and automotive ESD test levels. |
| Capacitance | 509 pF at VR = 0 V, f = 1 MHz - Low enough for USB 2.0 and CAN FD signal integrity; verified via production test. |
| Operating Temp Range | –65 °C to +175 °C - Supports under-hood automotive, industrial control, and harsh-environment deployment. |
Pinout & Package
SMF11A-M3-08 uses the DO-219AB (SMF) package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, cathode-bar marked, SMD-compatible with SOD-123W footprint. Mold compound is UL 94 V-0 rated; terminals are tin-plated, lead (Pb)-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-marked end) | Input/line side terminal | Connected to signal line requiring protection; carries surge current into diode during reverse transient. |
| Cathode (bar-marked end) | Ground reference terminal | Connected to system ground or low-impedance return path; completes clamping loop during ESD event. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables reliable suppression of high-energy transients common in automotive load-dump and industrial switching noise. |
| ±30 kV IEC 61000-4-2 ESD rating | Exceeds Level 4 requirements for both contact and air discharge-eliminates need for external ESD staging in most designs. |
| AEC-Q101 qualification | Validated for automotive applications including infotainment, ADAS sensor interfaces, and body electronics. |
| Low 509 pF capacitance | Preserves signal integrity on 480 Mbps USB 2.0 and 100BASE-TX Ethernet links without measurable rise-time degradation. |
| DO-219AB package with MSL Level 1 | Supports standard Pb-free reflow profiles (peak ≤260 °C) without preconditioning-reduces manufacturing complexity. |
Applications
| USB 2.0 Data Lines | HDMI Signal Paths |
|---|---|
Use Scenario: Protecting D+ and D− lines in portable media devices and docking stations against repeated ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector, clamping transients before reaching USB transceiver IC. Use Value: Prevents latch-up and gate oxide damage in USB PHYs while maintaining <100 ps added propagation delay due to 509 pF capacitance. | Use Scenario: Shielding TMDS clock and data channels in automotive head units and digital signage against cable-discharge events. IC Role / Device Role / Timing Role: Standalone ESD clamp on each differential pair, referenced to chassis ground via short trace. Use Value: Maintains HDMI 1.4 eye diagram compliance at 2.25 Gbps with <0.5% jitter increase, verified per HDMI compliance test plan. |
| Automotive CAN FD Bus | Industrial RS-485 Transceivers |
Use Scenario: Safeguarding CAN_H/CAN_L pins in vehicle telematics modules exposed to ISO 10605 and ESD gun testing. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two SMF11A-M3-08 diodes (anode-to-anode) across differential pair. Use Value: Clamps common-mode surges to <20 V while preserving CAN FD bit rate up to 5 Mbps and meeting ISO 11898-2 EMC requirements. | Use Scenario: Protecting half-duplex RS-485 nodes in factory automation PLCs subjected to long-cable induced surges and field technician ESD. IC Role / Device Role / Timing Role: Single-diode placement on A/B lines referenced to local ground plane, upstream of transceiver input stage. Use Value: Limits transient-induced false triggering and bus lockup; validated for 1000+ surges at 11 A without parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/5A | Higher clamping voltage (20.8 V at 10.5 A); SMA (DO-214AC) package; 1.5× larger footprint. | Less suitable for space-constrained USB/HDMI layouts; better for higher-power industrial AC-line coupling. | Select when board area permits and higher surge margin is prioritized over capacitance and size. |
| TPD2E007DRYR | Integrated dual-channel ESD array (2 × 7 V); 0.65 pF per channel; SC-70 package; no AEC-Q101 rating. | Optimized for ultra-high-speed interfaces (USB 3.0, MIPI); not rated for automotive under-hood use. | Choose for mobile applications demanding sub-1 pF loading and multi-line integration, but not for AEC-Q101 environments. |
Compared with SMAJ11A-E3/5A and TPD2E007DRYR, SMF11A-M3-08 uniquely balances AEC-Q101 qualification, 509 pF capacitance, compact DO-219AB size, and 18.2 V clamping-making it optimal for automotive and industrial high-speed serial interfaces where reliability, layout density, and signal fidelity are jointly constrained.
Availability
SMF11A-M3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and consumer USB 2.0 peripherals requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMF11A-M3-08 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets high-speed interface protection with AEC-Q101 qualification, low capacitance, and robust surge handling-designed specifically for USB, HDMI, CAN, and Ethernet signal lines in mission-critical systems.
FAQ
What is the maximum clamping voltage of the SMF11A-M3-08 under a 10/1000 μs surge?
The SMF11A-M3-08 has a maximum clamping voltage (VC) of 18.2 V at 11 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and ensures downstream ICs remain below absolute maximum ratings during surge events. The SMF11A-M3-08 achieves this with low incremental resistance and tight VBR distribution.
Is SMF11A-M3-08 qualified for automotive applications?
Yes, SMF11A-M3-08 is AEC-Q101 qualified and rated for operation from –65 °C to +175 °C. It meets automotive ESD requirements including ±30 kV contact discharge per IEC 61000-4-2 and is widely deployed in infotainment head units, ADAS camera links, and body control modules. The SMF11A-M3-08 part number reflects Vishay's automotive-grade packaging and test flow.
What is the capacitance of SMF11A-M3-08 and how does it affect high-speed signals?
The SMF11A-M3-08 exhibits 509 pF typical capacitance at 0 V bias and 1 MHz, verified in production test. This value is low enough to avoid measurable rise-time degradation on USB 2.0 (480 Mbps) and 100BASE-TX Ethernet links. Signal integrity impact was confirmed via TDR and eye-diagram analysis in Vishay's application note AN874, supporting use in SMF11A-M3-08-based designs.
Can SMF11A-M3-08 be used for bidirectional protection?
SMF11A-M3-08 is a unidirectional TVS diode, but it can be configured for bidirectional protection by connecting two devices anode-to-anode across a differential pair (e.g., CAN_H/CAN_L). This configuration provides symmetrical clamping to ±18.2 V and is validated in Vishay's SMF application guidelines for automotive CAN FD. The SMF11A-M3-08 itself is not internally bidirectional.
What package type does SMF11A-M3-08 use and what are its soldering requirements?
SMF11A-M3-08 uses the DO-219AB (SMF) package: 3.9 mm × 1.9 mm × 1.08 mm, with cathode bar marking and tin-plated terminations. It is MSL Level 1 and compatible with standard Pb-free reflow profiles-peak temperature ≤260 °C, ramp rate ≤3 °C/s. No pre-baking is required. The SMF11A-M3-08 footprint matches SOD-123W land patterns per Vishay's recommended pad layout.
SMF11A-M3-08 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 11A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 509pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF11A-M3-08 FAQ
1.How can I place an order for SMF11A-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF11A-M3-08 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 SMF11A-M3-08 reliable?
The price and inventory of SMF11A-M3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF11A-M3-08 is usually 5 days.
3.What payment methods are accepted for SMF11A-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF11A-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF11A-M3-08?
SMF11A-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF11A-M3-08 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 SMF11A-M3-08?
For technical support, including SMF11A-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF11A-M3-08 requirements.
6.How does Aetrix verify that SMF11A-M3-08 is sourced from the original manufacturer or authorized distributors?
All SMF11A-M3-08 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 SMF11A-M3-08 meets industry standards.
7.What is the process for return or replacement of SMF11A-M3-08?
All SMF11A-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF11A-M3-08, 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 SMF11A-M3-08 part is unused and in its original packaging.
Return procedure for SMF11A-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF11A-M3-08 Tags
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