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Vishay SMF11A-HE3_A08
- Part No.:
- SMF11A-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF11A-HE3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,164
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Product details
Overview
SMF11A-HE3_A08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in DO-219AB (SOD-123W) package, designed for I/O line protection in high-speed digital interfaces. 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 sensor signal lines.
For engineers reviewing the SMF11A-HE3_A08 datasheet, SMF11A-HE3_A08 pinout, SMF11A-HE3_A08 application, or SMF11A-HE3_A08 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, IEC 61000-4-2 ±30 kV ESD immunity, SOD-123W footprint compatibility, and real-world clamping performance under 10/1000 μs surge conditions.
Technical Context
This device operates as a transient voltage suppression (TVS) diode with unidirectional polarity, leveraging silicon avalanche technology to clamp fast-rising ESD transients before they damage downstream ICs. Its low incremental surge resistance ensures minimal voltage overshoot during 50 A forward surge events, while its "Low Noise" design achieves sub-nanosecond response time.
The SMF11A-HE3_A08 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and supports full AEC-Q101 qualification for automotive-grade reliability. It maintains stable clamping behavior across -65 °C to +175 °C operating temperature range and exhibits <0.1 μA leakage at VRWM - critical for low-power sensor and battery-backed interface protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 11 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin for 12 V nominal bus lines. |
| Breakdown Voltage (VBR) | 12.2–13.5 V at 1 mA - precise avalanche initiation threshold ensuring predictable turn-on during overvoltage events. |
| Clamping Voltage (VC) | 18.2 V max at 11 A IPPM - limits transient voltage seen by protected IC, staying well below typical 20 V absolute maximum ratings. |
| Junction Capacitance (CD) | 509 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) signal integrity, but not suitable for USB 3.x or PCIe Gen3+. |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 industrial requirements, enabling robust front-end port protection. |
| Package | DO-219AB (SOD-123W) - 3.9 × 1.9 × 1.08 mm low-profile outline compatible with automated SMT assembly and reflow profiles up to 260 °C. |
| AEC-Q101 Qualified | Yes - qualified for automotive applications including infotainment I/O, body control modules, and ADAS sensor interfaces. |
Pinout & Package
SMF11A-HE3_A08 uses a 2-terminal DO-219AB (SOD-123W) package with cathode-bar marking. The device has no internal circuitry beyond the single PN junction; terminals are non-polarized in layout but functionally asymmetric: anode connects to protected line, cathode to ground reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Input/Protected Line Terminal | Connected directly to the signal or power line requiring ESD protection; carries transient current into the diode during overvoltage. |
| Cathode (bar-marked end) | Ground Reference Terminal | Connected to system ground or low-impedance return path; completes clamping path and determines unidirectional conduction direction. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W Peak Pulse Power (10/1000 μs) | Enables reliable protection against IEC 61000-4-5 surge events on industrial communication lines without thermal runaway. |
| ±30 kV ESD Immunity (IEC 61000-4-2) | Eliminates need for secondary ESD stages in consumer and automotive USB/HDMI ports, reducing BOM count and PCB area. |
| AEC-Q101 Qualified | Validated for automotive under-hood and cabin environments, supporting 15-year lifetime requirements in harsh thermal cycling conditions. |
| Low Profile SOD-123W Footprint | Reduces board space by >30% vs. SMA/SMB packages while maintaining solder joint reliability under mechanical shock and vibration. |
| 180 K/W Thermal Resistance (RthJA) | Supports sustained operation at 175 °C junction temperature when mounted on standard 3 mm × 3 mm Cu pads - critical for engine control units. |
Applications
| USB 2.0 Data Lines | HDMI DDC/CEC Channels |
|---|---|
|
Use Scenario: Protecting differential USB 2.0 D+/D- signals from ESD events during hot-plug insertion in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between each data line and chassis ground, clamping transients within 1 ns. Use Value: Maintains signal integrity with 509 pF capacitance while limiting clamped voltage to ≤18.2 V - preserving USB 2.0 eye diagram margins. |
Use Scenario: Safeguarding HDMI DDC (I²C) and CEC control lines in smart TVs against user-handling ESD in living room environments. IC Role / Device Role / Timing Role: Standoff-rated TVS element on 5 V I²C bus, absorbing ±30 kV contact discharges without latch-up or parametric shift. Use Value: Prevents false I²C ACK/NACK errors and CEC command corruption during repeated plug/unplug cycles across product lifetime. |
| Automotive Sensor Interfaces | Industrial RS-485 Transceivers |
|
Use Scenario: Shielding analog output lines of pressure/temperature sensors in engine control modules from ignition noise and load dump coupling. IC Role / Device Role / Timing Role: Low-leakage (≤0.1 μA) standoff protector on 0–5 V sensor outputs, activated only during >12.2 V transients. Use Value: Avoids DC offset drift in sensor readings while delivering AEC-Q101-compliant reliability across -40 °C to +125 °C ambient. |
Use Scenario: Front-end protection for RS-485 transceiver A/B lines in factory automation gateways exposed to long cable runs and ground potential differences. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used in back-to-back configuration) suppressing 1 kV common-mode surges per IEC 61000-4-5. Use Value: Enables 200 W pulse handling per line without derating, sustaining 11 A peak current while holding VC ≤18.2 V to protect ISO 8482-compliant transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/57T | DO-214AC (SMA) package; 1.5× larger footprint; 19.9 V VC at 11.3 A; 650 pF capacitance. | Higher clamping voltage and capacitance limit use in USB 2.0; better suited for 24 V industrial power rails. | Select when board space allows larger package and higher VC is acceptable for non-high-speed lines. |
| TPD2E001DRYR | 2-channel bidirectional array in SOT-553; 12 V VRWM; 15 V VC at 1 A; 12 pF per channel. | Ultra-low capacitance enables USB 3.0/MIPI support, but lower 1 A IPPM restricts to low-energy ESD-only scenarios. | Choose for high-speed differential pairs where capacitance <15 pF is mandatory and surge energy is limited to IEC 61000-4-2 only. |
Compared with SMAJ11A-E3/57T and TPD2E001DRYR, SMF11A-HE3_A08 delivers optimal balance of compact SOD-123W size, 18.2 V clamping, 509 pF capacitance, and 11 A surge rating - making it the preferred choice for cost-sensitive, space-constrained USB 2.0 and automotive sensor protection where moderate surge energy must be absorbed reliably.
Availability
SMF11A-HE3_A08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive sensor signal conditioning, and industrial RS-485 transceiver safeguarding requiring stable component supply and AEC-Q101 compliance.
Supply support for SMF11A-HE3_A08 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 optimized clamping, low capacitance, and AEC-Q101 qualification - engineered specifically for USB, HDMI, CAN, and sensor signal line hardening in harsh environments.
FAQ
What is the maximum clamping voltage of SMF11A-HE3_A08 at its rated peak pulse current?
The SMF11A-HE3_A08 has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated 11 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is guaranteed across the full operating temperature range and ensures protected ICs remain within safe voltage limits during transient events. The clamping performance is validated per IEC 61000-4-5 test methodology and documented in Vishay's official datasheet revision 2.4.
Is SMF11A-HE3_A08 suitable for bidirectional signal lines like USB D+ and D-?
SMF11A-HE3_A08 is a unidirectional TVS diode and must be used in a back-to-back configuration (two devices) to protect bidirectional lines such as USB D+ and D-. Each SMF11A-HE3_A08 handles one polarity: anode to signal, cathode to ground for positive transients; a second device with reversed orientation handles negative transients. This arrangement preserves the 11 V VRWM and 18.2 V VC specifications while enabling full ±30 kV ESD protection on differential pairs.
Does SMF11A-HE3_A08 meet automotive qualification standards?
Yes, SMF11A-HE3_A08 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 bias, mechanical shock, and ESD - all performed per AEC-Q101-001 and AEC-Q101-002 standards. This certification is explicitly stated in the Vishay datasheet and applies to the HE3_A08 packaging variant.
What is the junction capacitance of SMF11A-HE3_A08 and how does it affect high-speed signal integrity?
The SMF11A-HE3_A08 exhibits 509 pF typical junction capacitance at 0 V and 1 MHz. This value is low enough to maintain signal integrity on USB 2.0 (480 Mbps) and HDMI DDC/CEC channels without measurable eye diagram degradation, but too high for USB 3.0 (5 Gbps) or MIPI D-PHY interfaces, which require <15 pF. Designers should verify insertion loss and return loss in their specific layout using this measured capacitance value.
Can SMF11A-HE3_A08 be used in reflow soldering processes?
Yes, SMF11A-HE3_A08 is fully compatible with standard lead-free reflow soldering processes, including peak temperatures up to 260 °C. Its DO-219AB (SOD-123W) package is rated for MSL level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions without baking. The device supports both wave and reflow soldering, and Vishay provides detailed footprint recommendations in the package drawing document S8-V-3915.01-001.
SMF11A-HE3_A08 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_A08 FAQ
1.How can I place an order for SMF11A-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF11A-HE3_A08 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_A08 reliable?
The price and inventory of SMF11A-HE3_A08 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_A08 is usually 5 days.
3.What payment methods are accepted for SMF11A-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF11A-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF11A-HE3_A08?
SMF11A-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF11A-HE3_A08 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_A08?
For technical support, including SMF11A-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF11A-HE3_A08 requirements.
6.How does Aetrix verify that SMF11A-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF11A-HE3_A08 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_A08 meets industry standards.
7.What is the process for return or replacement of SMF11A-HE3_A08?
All SMF11A-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF11A-HE3_A08, 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_A08 part is unused and in its original packaging.
Return procedure for SMF11A-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF11A-HE3_A08 Tags
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