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Vishay General Semiconductor - Diodes Division SMF11A-E3-08
- Part No.:
- SMF11A-E3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF11A-E3-08.pdf
- Description:
- TVS DIODE 11VWM 18.2VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:24,000
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Product details
Overview
SMF11A-E3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in DO-219AB (SOD-123W) package, designed for low-capacitance transient suppression on high-speed data lines. It features a 11 V stand-off voltage (VRWM), 12.2–13.5 V reverse breakdown (VBR), 11 A peak pulse current (IPPM), 18.2 V maximum clamping voltage (VC) at IPPM, and 509 pF typical junction capacitance at 0 V - optimized for USB 2.0, HDMI, and industrial I/O port protection.
For engineers reviewing the SMF11A-E3-08 datasheet, SMF11A-E3-08 pinout, SMF11A-E3-08 application, or SMF11A-E3-08 equivalent, this device delivers verified ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification, and low-noise fast response for robust signal integrity in automotive infotainment, industrial HMI, and medical sensor interfaces.
Technical Context
This unidirectional TVS diode operates in avalanche mode to clamp transients above its breakdown threshold while maintaining low leakage (<0.1 µA at VRWM) and minimal capacitive loading. Its 10/1000 µs waveform rating of 200 W peak pulse power and 8/20 µs rating of 1000 W enable reliable surge handling per IEC 61000-4-5 Level 3.
The SMF11A-E3-08 uses Vishay's "Low Noise" silicon technology for sub-nanosecond response time and exhibits stable clamping behavior across -65 °C to +175 °C operating range, with thermal resistance RthJA = 180 K/W on standard 3 mm × 3 mm Cu pads - supporting high-reliability deployment in under-hood automotive and harsh-environment industrial control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 11 V - maximum continuous reverse voltage before significant leakage; ensures no interference with 9–10 V nominal signal rails. |
| Reverse Breakdown (VBR) | 12.2–13.5 V at 1 mA - precise avalanche initiation threshold enabling predictable clamping onset. |
| Clamping Voltage (VC) | 18.2 V max at 11 A (10/1000 µs) - limits downstream IC stress to safe levels during ESD events. |
| Junction Capacitance (CD) | 509 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) and RS-485, but not suitable for PCIe or USB 3.0. |
| ESD Immunity | ±30 kV contact & air discharge (IEC 61000-4-2) - exceeds industrial and automotive ESD immunity requirements. |
| Peak Pulse Power | 200 W (10/1000 µs), 1000 W (8/20 µs) - supports multi-pulse surge resilience in power-supply-adjacent I/O paths. |
| AEC-Q101 Qualified | Yes - validated for automotive applications including infotainment, body electronics, and ADAS sensor interfaces. |
Pinout & Package
SMF11A-E3-08 is housed in the DO-219AB (SOD-123W) package: low-profile (1.08 mm height), molded epoxy case with cathode band marking, compatible with wave and reflow soldering (peak temp ≤260 °C). MSL level 1, UL 94 V-0 rated, 15 mg weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Signal Line Terminal | Connected to protected line (e.g., USB D+); conducts during positive transients when cathode is biased higher. |
| Cathode | Ground Reference Terminal | Connected to system ground or low-impedance return path; defines unidirectional clamping polarity and ESD current sink path. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W Peak Pulse Power (10/1000 µs) | Enables sustained protection against repetitive ESD and lightning-induced surges in industrial fieldbus nodes. |
| ±30 kV ESD Immunity (IEC 61000-4-2) | Eliminates need for external ESD test margining in final product validation for CE/FCC/automotive EMC compliance. |
| 509 pF Junction Capacitance | Preserves signal rise/fall times on 480 Mbps USB 2.0 and 25 Mbps CAN FD lines without measurable jitter penalty. |
| AEC-Q101 Qualified | Validated for 1000-cycle temperature cycling (-40 °C to +125 °C), mechanical shock, and board-level reliability in automotive ECUs. |
| DO-219AB (SOD-123W) Package | Enables high-density PCB layout with 1.9 mm width and 3.9 mm length - fits tight spacing around connectors and sensors. |
Applications
| USB 2.0 Port Protection | HDMI DDC Channel Protection |
|---|---|
Use Scenario: Protecting USB 2.0 upstream/downstream ports on industrial HMIs against accidental ESD discharge during cable insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between D+ and ground, clamping transients before they reach the USB transceiver. Use Value: Maintains <500 pF capacitance to avoid signal integrity degradation while delivering ±30 kV contact ESD immunity per IEC 61000-4-2. |
Use Scenario: Safeguarding HDMI DDC (I²C) lines in digital signage controllers exposed to frequent human touch and static buildup. IC Role / Device Role / Timing Role: Low-leakage (0.1 µA max at 11 V) clamping device on SDA/SCL lines, preserving I²C timing margins. Use Value: Prevents latch-up or damage to HDMI source/sink controllers without adding propagation delay or bus contention risk. |
| Automotive Infotainment Display Interface | Industrial RS-485 Transceiver Protection |
Use Scenario: Shielding LVDS or parallel RGB interface lines between MCU and TFT display in automotive dashboards. IC Role / Device Role / Timing Role: Standoff-rated (11 V) TVS on each signal line, referenced to chassis ground to suppress coupled transients. Use Value: AEC-Q101 qualification ensures operation across -40 °C to +125 °C ambient, with no derating required up to 175 °C junction. |
Use Scenario: Protecting RS-485 transceiver inputs/outputs in factory automation PLCs subjected to long-cable induced surges. IC Role / Device Role / Timing Role: Bidirectional protection achieved via back-to-back configuration (two SMF11A-E3-08 devices). Use Value: 1000 W 8/20 µs surge rating handles IEC 61000-4-5 Level 3 surges without degradation after repeated events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/57T | Higher clamping voltage (20.8 V), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 600 pF capacitance. | Less suitable for high-speed interfaces; better for power-rail or lower-frequency analog I/O where space allows. | Select when board layout permits larger footprint and higher clamping is acceptable for cost-sensitive industrial designs. |
| TPD2E001DRYR | 2-channel, 15 pF dual-diode array in 1.45 mm × 1.0 mm USON-6; 12 V VRWM, ±8 kV HBM, no IEC 61000-4-2 rating. | Optimized for ultra-compact USB Type-C or MIPI lanes; lacks automotive qualification and full-system ESD certification. | Choose for space-constrained portable electronics where ultra-low capacitance outweighs automotive or industrial compliance needs. |
Compared with SMAJ11A-E3/57T and TPD2E001DRYR, SMF11A-E3-08 uniquely balances AEC-Q101 qualification, ±30 kV IEC 61000-4-2 immunity, and 509 pF capacitance in a compact DO-219AB package - making it the preferred choice for automotive and industrial high-speed serial interfaces requiring certified robustness.
Availability
SMF11A-E3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial HMI front panels, and medical patient-monitoring I/O modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMF11A-E3-08 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 data line protection with AEC-Q101 qualification, low capacitance, and industry-leading ESD immunity - engineered specifically for automotive infotainment, industrial connectivity, and medical sensor interfaces.
FAQ
What is the maximum clamping voltage of SMF11A-E3-08 at its rated peak pulse current?
The SMF11A-E3-08 has a maximum clamping voltage (VC) of 18.2 V at its rated peak pulse current (IPPM) of 11 A under 10/1000 µs waveform conditions. This value is specified in the Electrical Characteristics table of Vishay's document 85881 and ensures downstream ICs remain within safe voltage limits during ESD events. The SMF11A-E3-08 maintains this clamping performance across its full operating temperature range of -65 °C to +175 °C.
Is SMF11A-E3-08 qualified for automotive applications?
Yes, SMF11A-E3-08 is AEC-Q101 qualified, as confirmed in Vishay's official documentation (Rev. 2.4, 04-Jul-2023). It meets stress tests including temperature cycling, mechanical shock, and high-temperature operating life - validating its suitability for automotive infotainment, body control modules, and ADAS sensor interfaces. The SMF11A-E3-08 also complies with IEC 61000-4-2 ±30 kV ESD immunity, a key requirement for automotive EMC standards.
What package type does SMF11A-E3-08 use, and is it compatible with automated assembly?
SMF11A-E3-08 uses the DO-219AB (SOD-123W) package - a low-profile, surface-mount outline measuring 3.9 mm × 1.9 mm × 1.08 mm. It is fully compatible with automated wave and reflow soldering processes, with peak temperature tolerance up to 260 °C per J-STD-020. The SMF11A-E3-08 is supplied on 8 mm tape-and-reel (3K per 7″ reel), supporting high-volume SMT placement without manual handling.
How does the junction capacitance of SMF11A-E3-08 affect high-speed signal integrity?
The SMF11A-E3-08 has a typical junction capacitance of 509 pF at 0 V and 1 MHz, which is appropriate for USB 2.0 (480 Mbps) and RS-485 (25 Mbps) but too high for USB 3.0 (5 Gbps) or HDMI 2.0 (6 Gbps). This capacitance introduces minimal signal distortion on compliant interfaces when placed close to connectors. The SMF11A-E3-08's low-noise design ensures sub-nanosecond response without ringing or overshoot that could compromise timing margins.
Can SMF11A-E3-08 be used for bidirectional transient protection?
SMF11A-E3-08 is a unidirectional TVS diode and is not inherently bidirectional. However, it can be configured for bidirectional protection by placing two devices in series opposition (anode-to-anode or cathode-to-cathode), as documented in Vishay's application guidance. This arrangement provides symmetrical clamping for AC-coupled lines like RS-485 or CAN. The SMF11A-E3-08's low leakage (<0.1 µA at 11 V) prevents DC bias disruption in such configurations.
SMF11A-E3-08 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-E3-08 FAQ
1.How can I place an order for SMF11A-E3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF11A-E3-08 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-E3-08 reliable?
The price and inventory of SMF11A-E3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF11A-E3-08 is usually 5 days.
3.What payment methods are accepted for SMF11A-E3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF11A-E3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF11A-E3-08?
SMF11A-E3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF11A-E3-08 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-E3-08?
For technical support, including SMF11A-E3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF11A-E3-08 requirements.
6.How does Aetrix verify that SMF11A-E3-08 is sourced from the original manufacturer or authorized distributors?
All SMF11A-E3-08 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-E3-08 meets industry standards.
7.What is the process for return or replacement of SMF11A-E3-08?
All SMF11A-E3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF11A-E3-08, 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-E3-08 part is unused and in its original packaging.
Return procedure for SMF11A-E3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF11A-E3-08 Tags
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