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Vishay SMF11A-HE3_A18
- Part No.:
- SMF11A-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF11A-HE3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,403
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Product details
Overview
SMF11A-HE3_A18 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 breakdown range (VBR), 11 A peak pulse current (IPPM), 18.2 V maximum clamping voltage (VC) at 11 A, and 509 pF typical capacitance at 0 V - optimized for USB 2.0, HDMI, and industrial I/O interfaces.
For engineers reviewing the SMF11A-HE3_A18 datasheet, SMF11A-HE3_A18 pinout, SMF11A-HE3_A18 application, or SMF11A-HE3_A18 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low capacitance for signal integrity, AEC-Q101 qualification status, and SOD-123W-compatible footprint compatibility with automated assembly.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche junction technology to clamp transient overvoltages before they damage downstream ICs. Its low incremental surge resistance ensures rapid response (<1 ns) and stable clamping during ±30 kV IEC 61000-4-2 ESD events.
The SMF11A-HE3_A18 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and supports continuous operation from –65 °C to +175 °C. It meets AEC-Q101 stress testing for automotive-grade reliability and exhibits MSL Level 1 moisture sensitivity for uncomplicated reflow soldering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 11 V - maximum continuous reverse operating voltage before leakage exceeds 0.1 μA |
| Breakdown Voltage (VBR) | 12.2–13.5 V at 1 mA - defines onset of avalanche conduction under transient stress |
| Clamping Voltage (VC) | 18.2 V max at 11 A IPPM - limits voltage seen by protected circuit during worst-case surge |
| Peak Pulse Current (IPPM) | 11 A (10/1000 μs) - quantifies surge-handling capacity without failure |
| Capacitance (CD) | 509 pF at 0 V, 1 MHz - impacts signal rise time and insertion loss in high-speed lines |
| ESD Rating | ±30 kV contact/air per IEC 61000-4-2 - exceeds industrial and automotive ESD immunity requirements |
| Operating Temp Range | –65 °C to +175 °C - enables deployment in under-hood, industrial, and aerospace environments |
Pinout & Package
The SMF11A-HE3_A18 uses the DO-219AB (SMF) package: low-profile (1.08 mm height), SOD-123W-compatible outline, cathode-bar marked, and fully compatible with wave and reflow soldering per J-STD-020 MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side | Connected to signal line requiring protection; conducts during positive transients when cathode is grounded |
| Cathode | Ground reference | Connected to system ground or low-impedance return path; establishes unidirectional clamping polarity |
Key Features
| Feature | Design Value |
|---|---|
| Low-clamp architecture | 18.2 V VC at 11 A ensures minimal overvoltage exposure to sensitive receivers like USB PHYs |
| "Low Noise" fast response | Sub-nanosecond turn-on suppresses ESD before logic thresholds are violated |
| AEC-Q101 qualified | Validated for automotive applications including infotainment and body control modules |
| SOD-123W footprint compatibility | Enables drop-in replacement in existing layouts using industry-standard land patterns |
| Reflow/wave solderable | Rated for peak reflow temperatures up to 260 °C, supporting high-yield automated assembly |
Applications
| USB 2.0 Data Lines | HDMI Interface Protection |
|---|---|
Use Scenario: Protecting D+ and D– pins of USB 2.0 transceivers against ESD events during hot-plug and cable handling. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between data line and ground to clamp transients while preserving 480 Mbps signal fidelity. Use Value: 509 pF capacitance minimizes signal distortion; 18.2 V clamping prevents receiver latch-up or damage during ±30 kV contact discharge. | Use Scenario: Safeguarding TMDS clock and data channels in HDMI 1.4 receivers against electrostatic discharge in consumer AV equipment. IC Role / Device Role / Timing Role: Single-channel ESD suppressor on each differential pair, referenced to chassis ground. Use Value: Low capacitance preserves edge rate integrity; 11 V VRWM avoids interference with 3.3 V HDMI logic levels. |
| Industrial I/O Ports | Automotive Sensor Interfaces |
Use Scenario: Shielding RS-485/RS-232 transceiver inputs in PLCs and factory automation controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal lines entering enclosure, shunting transients to local ground plane. Use Value: 175 °C max junction temperature supports operation near heat-generating power stages; 200 W surge rating handles induced lightning surges. | Use Scenario: Protecting LIN bus or analog sensor inputs (e.g., temperature, pressure) in engine control units and ADAS modules. IC Role / Device Role / Timing Role: Unidirectional clamping device on sensor signal path, referenced to vehicle ground. Use Value: AEC-Q101 qualification confirms robustness across thermal cycling and vibration; 11 V VRWM aligns with 12 V automotive supply rails. |
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), larger SMA (DO-214AC) package, 600 pF capacitance | Less suitable for high-speed interfaces due to higher capacitance and slower response | Select when board space allows larger footprint and lower-cost procurement is prioritized over signal integrity |
| TPD2E001DRYR | Bi-directional dual-channel array, 10 pF capacitance, integrated 5 V DC blocking, not AEC-Q101 qualified | Better for ultra-high-speed USB 2.0 but lacks automotive qualification and higher surge rating | Prefer for compact consumer electronics where bi-directional protection and ultra-low capacitance outweigh automotive compliance needs |
Compared with SMAJ11A-E3/5A and TPD2E001DRYR, the SMF11A-HE3_A18 delivers optimal balance of low capacitance, automotive qualification, and compact DO-219AB packaging - making it ideal for space-constrained, high-reliability industrial and automotive data line protection.
Availability
SMF11A-HE3_A18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line safeguarding, and automotive sensor interface hardening requiring stable component supply across production lifecycles.
Supply support for SMF11A-HE3_A18 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 industrial, automotive, and computing markets.
The SMF series targets high-speed data line protection with emphasis on low capacitance, fast response, and AEC-Q101 qualification - engineered specifically for ESD-hardened USB, HDMI, and automotive serial bus interfaces.
FAQ
What is the clamping voltage of the SMF11A-HE3_A18 at its rated peak pulse current?
The SMF11A-HE3_A18 has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated 11 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured across the device terminals and represents the upper limit of voltage imposed on the protected circuit during surge conditions - critical for ensuring downstream ICs remain within safe operating voltage margins.
Is the SMF11A-HE3_A18 qualified to AEC-Q101 standards?
Yes, the SMF11A-HE3_A18 is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, infotainment systems, and ADAS sensor interfaces. The qualification covers stress tests for temperature cycling, humidity, mechanical shock, and ESD - all verified per the full AEC-Q101-001 through -011 test plan, as documented in Vishay's official certification records.
What package type does the SMF11A-HE3_A18 use, and is it compatible with standard SMT processes?
The SMF11A-HE3_A18 uses the DO-219AB (SMF) package - a low-profile surface-mount outline measuring 3.9 × 1.9 × 1.08 mm. It is fully compatible with standard reflow and wave soldering processes, rated for peak reflow temperatures up to 260 °C, and classified as MSL Level 1 per J-STD-020, eliminating bake requirements prior to assembly.
How does the capacitance of the SMF11A-HE3_A18 affect high-speed signal integrity?
The SMF11A-HE3_A18 exhibits 509 pF typical capacitance at 0 V and 1 MHz, which directly influences signal rise time and insertion loss on protected lines. In USB 2.0 applications, this value maintains acceptable eye diagram margin while providing robust ESD suppression - significantly lower than legacy SMAJ devices (>600 pF) and carefully balanced to avoid excessive RC filtering of high-frequency content.
What is the standoff voltage rating of the SMF11A-HE3_A18, and why is it important for circuit design?
The SMF11A-HE3_A18 has a maximum standoff voltage (VRWM) of 11 V, meaning it remains non-conductive with leakage <0.1 μA up to this reverse voltage. This rating ensures no unintended loading or power loss on 3.3 V or 5 V data lines during normal operation, while still allowing effective clamping above 12.2 V during transients - a critical margin for reliable interface protection without false triggering.
SMF11A-HE3_A18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- 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:
- -
- Capacitance @ Frequency:
- 509pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF11A-HE3_A18 FAQ
1.How can I place an order for SMF11A-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF11A-HE3_A18 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-HE3_A18 reliable?
The price and inventory of SMF11A-HE3_A18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF11A-HE3_A18 is usually 5 days.
3.What payment methods are accepted for SMF11A-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF11A-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF11A-HE3_A18?
SMF11A-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF11A-HE3_A18 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-HE3_A18?
For technical support, including SMF11A-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF11A-HE3_A18 requirements.
6.How does Aetrix verify that SMF11A-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF11A-HE3_A18 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-HE3_A18 meets industry standards.
7.What is the process for return or replacement of SMF11A-HE3_A18?
All SMF11A-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF11A-HE3_A18, 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-HE3_A18 part is unused and in its original packaging.
Return procedure for SMF11A-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF11A-HE3_A18 Tags
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