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Vishay SMF11A-HM3_A08
- Part No.:
- SMF11A-HM3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF11A-HM3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,864
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Product details
Overview
SMF11A-HM3_A08 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 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-HM3_A08 datasheet, SMF11A-HM3_A08 pinout, SMF11A-HM3_A08 application, or SMF11A-HM3_A08 equivalent, this device is evaluated for ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification, low-noise fast response, and compatibility with wave/reflow soldering in space-constrained PCB layouts.
Technical Context
This diode operates as a single-channel unidirectional TVS device, leveraging silicon avalanche technology to clamp transients above its breakdown threshold while maintaining low leakage (<0.1 µA at VRWM). Its low incremental surge resistance ensures minimal voltage overshoot during 10/1000 µs surges, and its 1.08 mm height supports ultra-thin board designs.
The SMF11A-HM3_A08 is rated for continuous operation from –65 °C to +175 °C, with thermal resistance RthJA = 180 K/W on standard 3 mm × 3 mm Cu pads, enabling robust performance in automotive under-hood and industrial control environments without derating at elevated ambient temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 11 V - maximum continuous reverse operating voltage before significant leakage begins; defines safe signal swing range for protected line |
| Breakdown Voltage (VBR) | 12.2–13.5 V at 1 mA - precise avalanche onset threshold ensuring predictable clamping initiation |
| Clamping Voltage (VC) | 18.2 V max at 11 A (10/1000 µs) - limits downstream IC stress during surge events |
| Junction Capacitance (CD) | 509 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) signal integrity, not suitable for USB 3.x or PCIe |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for end-equipment certification |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 × 1.9 × 1.08 mm low-profile outline enabling automated placement and high-density routing |
| AEC-Q101 Qualified | Yes - validated for automotive applications including infotainment and body electronics requiring reliability under thermal cycling and vibration |
Pinout & Package
SMF11A-HM3_A08 uses the DO-219AB (SMF) package: an asymmetrical surface-mount case with cathode band marking on one end. The device has two terminals: anode and cathode. Mounting requires alignment with tape orientation per Vishay's carrier tape diagram (cathode toward unreeling direction).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to the signal or power line requiring protection; referenced to system ground via cathode path during clamping |
| Cathode | Ground-reference terminal | Connected to local ground plane; carries full surge current to ground during ESD event; marked by bar on package body |
Key Features
| Feature | Design Value |
|---|---|
| 200 W Peak Pulse Power (10/1000 µs) | Sustains repeated low-duty-cycle surges without degradation - suitable for intermittent ESD events in field-deployed equipment |
| Low-Noise Fast Response | Sub-nanosecond turn-on enables clamping before sensitive ICs experience overvoltage - critical for high-speed serial interfaces |
| Wave & Reflow Solderable | Compatible with standard Pb-free reflow profiles (peak ≤260 °C); eliminates need for hand-soldering or special thermal management |
| MSL Level 1 Moisture Sensitivity | Unlimited floor life at ≤30 °C/60% RH - no baking required prior to assembly, reducing manufacturing overhead |
| UL 94 V-0 Molding Compound | Self-extinguishing encapsulation meets flammability safety standards for industrial and automotive enclosures |
Applications
| USB 2.0 Data Lines | HDMI Source Ports |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable media players and docking stations against user-hand ESD. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed directly at connector entry point, shunting ESD energy to chassis ground. Use Value: 509 pF capacitance preserves signal rise/fall times within USB 2.0 specification; 18.2 V clamping prevents damage to PHY transceivers rated for ≤20 V absolute maximum. | Use Scenario: Shielding TMDS clock and data channels in set-top boxes and AV receivers from cable-discharge events. IC Role / Device Role / Timing Role: Line-side ESD clamp on each of four TMDS lanes, mounted adjacent to HDMI receptacle with minimal trace length. Use Value: ±30 kV IEC 61000-4-2 rating ensures compliance with HDMI Compliance Test Specification v1.4a; DO-219AB footprint allows tight layout without compromising ground return path. |
| Industrial I/O Modules | Automotive Infotainment Displays |
Use Scenario: Safeguarding RS-485/RS-232 interface pins on programmable logic controllers exposed to factory-floor ESD. IC Role / Device Role / Timing Role: Primary ESD protection element on communication ports, coordinated with upstream series impedance for filtering. Use Value: –65 °C to +175 °C operating range supports extended temperature operation in unconditioned control cabinets; AEC-Q101 qualification adds confidence for harsh-environment reuse. | Use Scenario: Protecting LVDS video and touch controller signals in center-stack displays subjected to glove-based ESD in cold climates. IC Role / Device Role / Timing Role: Low-capacitance TVS on display flex cable connectors, placed between EMI filter and display driver IC. Use Value: 1.08 mm height fits beneath narrow bezels; 11 V VRWM matches typical LVDS common-mode voltage, avoiding false triggering during normal operation. |
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 | DO-214AC (SMA) package; 3.5 mm height vs. 1.08 mm; 12.2–13.5 V VBR same; 18.2 V VC same; 509 pF CD same | Larger footprint and height limit use in ultra-thin or high-density layouts; higher RthJA (200 K/W) reduces thermal margin | Select when existing SMA land pattern is fixed and board thickness constraints allow taller components |
| TPD2E001DRYR | Bi-directional dual-channel array in SOT-553; 10 V VRWM; 15 pF CD; integrated 4.7 Ω series resistors; no AEC-Q101 rating | Designed for high-speed digital lines (e.g., USB OTG, I²C); lower capacitance but lacks automotive qualification and single-line surge handling | Select for space-constrained digital interfaces needing bi-directional protection and integrated series resistance, not for high-energy surge scenarios |
Compared with SMAJ11A-E3/5A and TPD2E001DRYR, SMF11A-HM3_A08 delivers the lowest profile and highest thermal efficiency in its voltage class, with AEC-Q101 validation making it the preferred choice for automotive and industrial applications where mechanical clearance and reliability under thermal stress are critical.
Availability
SMF11A-HM3_A08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI source port hardening, and industrial RS-485 I/O modules requiring stable component supply across multi-year production cycles.
Supply support for SMF11A-HM3_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 was developed specifically for space-constrained, high-surge ESD protection in automotive infotainment, industrial connectivity, and consumer multimedia interfaces - prioritizing low profile, AEC-Q101 compliance, and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of SMF11A-HM3_A08 under a 10/1000 µs surge?
The SMF11A-HM3_A08 has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated 11 A peak pulse current with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures downstream ICs see limited overvoltage during transient events. The clamping behavior is consistent across the full operating temperature range of –65 °C to +175 °C.
Is SMF11A-HM3_A08 qualified to AEC-Q101 standards?
Yes, SMF11A-HM3_A08 is AEC-Q101 qualified, having passed stress tests including high-temperature operating life, temperature cycling, and ESD human body model (H3B > 8 kV). This qualification confirms its suitability for automotive applications such as infotainment displays, body control modules, and telematics units where long-term reliability under thermal and mechanical stress is mandatory.
What does the "_A08" suffix indicate in SMF11A-HM3_A08?
Per Vishay's ordering nomenclature, the "_A08" suffix in SMF11A-HM3_A08 denotes packaging: 3,000 pieces per 7-inch reel on 8 mm tape, with a minimum order quantity of 30,000 units. The "HM3" portion indicates halogen-free, RoHS-compliant, lead (Pb)-free terminations with tin plating - fully compatible with modern Pb-free reflow processes.
Can SMF11A-HM3_A08 be used for bi-directional signal lines like USB D+/D−?
No, SMF11A-HM3_A08 is a unidirectional device intended for DC-biased or ground-referenced lines. For true bi-directional protection of differential pairs such as USB D+/D−, a dedicated bi-directional TVS like SMAJ11CA or a dual-channel array (e.g., PUSB3FR4) is required. Using SMF11A-HM3_A08 on AC-coupled lines risks forward conduction and signal distortion during normal operation.
What is the thermal resistance (RthJA) of SMF11A-HM3_A08 on a standard PCB?
The junction-to-ambient thermal resistance (RthJA) of SMF11A-HM3_A08 is 180 K/W when mounted on an epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 µm thick. This value assumes no additional thermal vias or heatsinking. For high-power surge duty cycles or elevated ambient temperatures, designers should verify junction temperature using actual board layout and expected surge repetition rate to ensure TJ remains below 175 °C.
SMF11A-HM3_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-HM3_A08 FAQ
1.How can I place an order for SMF11A-HM3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF11A-HM3_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-HM3_A08 reliable?
The price and inventory of SMF11A-HM3_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-HM3_A08 is usually 5 days.
3.What payment methods are accepted for SMF11A-HM3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF11A-HM3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF11A-HM3_A08?
SMF11A-HM3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF11A-HM3_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-HM3_A08?
For technical support, including SMF11A-HM3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF11A-HM3_A08 requirements.
6.How does Aetrix verify that SMF11A-HM3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF11A-HM3_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-HM3_A08 meets industry standards.
7.What is the process for return or replacement of SMF11A-HM3_A08?
All SMF11A-HM3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF11A-HM3_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-HM3_A08 part is unused and in its original packaging.
Return procedure for SMF11A-HM3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF11A-HM3_A08 Tags
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