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Vishay SMF11A-HM3_A18
- Part No.:
- SMF11A-HM3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF11A-HM3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,918
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Product details
Overview
SMF11A-HM3_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 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), and 509 pF typical capacitance at 1 MHz - optimized for USB 2.0, HDMI, and industrial I/O port protection.
For engineers reviewing the SMF11A-HM3_A18 datasheet, SMF11A-HM3_A18 pinout, SMF11A-HM3_A18 application, or SMF11A-HM3_A18 equivalent, this device delivers verified ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification, low 1.08 mm profile, and compatibility with SOD-123W footprint layouts - critical for space-constrained automotive and industrial PCB designs.
Technical Context
This unidirectional TVS diode operates as a clamping device in parallel with protected signal paths, activating when transient voltage exceeds its reverse standoff rating of 11 V. Its low incremental surge resistance ensures rapid energy diversion during 10/1000 μs surges up to 200 W, while maintaining sub-20 V clamping under 11 A peak current.
The SMF11A-HM3_A18 uses silicon avalanche junction technology with "Low Noise" fast-response design, achieving nanosecond-level turn-on for ESD events per IEC 61000-4-2. It is rated for continuous operation from –65 °C to +175 °C and qualified to AEC-Q101 for automotive under-hood and infotainment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 11 V - defines maximum continuous operating voltage before clamping begins; matches 12 V nominal bus systems with margin. |
| Reverse Breakdown (VBR) | 12.2–13.5 V at 1 mA - tight tolerance ensures predictable activation threshold across temperature and production lots. |
| Clamping Voltage (VC) | 18.2 V max at 11 A IPPM - limits downstream IC stress during 10/1000 μs transients, enabling robust interface protection. |
| Capacitance (CD) | 509 pF at 0 V, 1 MHz - suitable for <480 Mbps data lines (e.g., USB 2.0); low enough to avoid signal integrity degradation. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for industrial and automotive end-equipment. |
| Package | DO-219AB (SMF) - 3.9 × 1.9 × 1.08 mm low-profile SMD outline compatible with SOD-123W land patterns and reflow processes. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HBM >8 kV, enabling use in ADAS sensors and body control modules. |
Pinout & Package
SMF11A-HM3_A18 is housed in the DO-219AB (SMF) package: a two-terminal, cathode-marked, surface-mount plastic case measuring 3.9 mm × 1.9 mm × 1.08 mm, with gull-wing leads optimized for wave and reflow soldering. The package meets UL 94 V-0 flammability rating and J-STD-020 MSL level 1 handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Signal path input (protected side) | Connected to line under protection (e.g., USB D+); conducts forward during positive transients only in unidirectional configuration. |
| Cathode | Ground reference / clamp node | Connected to system ground or low-impedance return; provides low-resistance path to shunt ESD current away from IC pins. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W Peak Pulse Power (10/1000 μs) | Enables reliable suppression of lightning-induced surges and system-level EFT events without thermal runaway. |
| ±30 kV ESD Immunity (IEC 61000-4-2) | Meets highest industrial and automotive ESD test levels without degradation after 10 pulses. |
| Low 1.08 mm Height | Supports ultra-thin PCB assemblies in portable medical devices and compact automotive ECUs. |
| AEC-Q101 Qualified | Validated for automotive under-hood environments including temperature cycling, humidity, and mechanical shock. |
| SOD-123W Footprint Compatibility | Allows drop-in replacement on existing layouts designed for industry-standard SOD-123W packages. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines in automotive infotainment head units against hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between connector and USB transceiver IC to limit voltage excursion below 18.2 V. Use Value: Prevents latch-up or gate oxide damage in USB PHY ICs while maintaining signal integrity via 509 pF capacitance. | Use Scenario: Safeguarding HDMI TMDS clock and data channels in digital signage controllers exposed to field ESD during installation or maintenance. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on each differential pair, referenced to chassis ground. Use Value: Ensures compliance with IEC 61000-4-2 Level 4 without degrading 165 MHz pixel clock timing due to low capacitance and fast response. |
| Industrial I/O Port Protection | Automotive Sensor Interface Protection |
Use Scenario: Shielding RS-485/RS-232 communication ports on PLC modules from induced surges in factory floor environments. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional diode used in conjunction with series impedance to form a complete TVS network. Use Value: Withstands 200 W surges and maintains 11 V standoff to preserve signal swing margins for ±5 V logic interfaces. | Use Scenario: Protecting LIN bus or analog sensor inputs (e.g., pressure, temperature) in engine control units from battery dump and load-switch transients. IC Role / Device Role / Timing Role: Clamping element referenced to vehicle ground, activated only above 12.2 V to avoid interfering with normal 5–12 V sensor signals. Use Value: AEC-Q101 qualification and –65 °C to +175 °C operation ensure reliability in under-hood thermal cycles and vibration. |
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; 1000 W peak power (8/20 μs); higher clamping at 19.9 V. | Less suitable for ultra-low-profile designs; better for higher-energy surges but larger footprint. | Select SMAJ11A-E3/5A only if board height >1.5 mm is acceptable and 8/20 μs surge immunity is prioritized over ESD speed. |
| TPD2E001DRYR | Quad-channel, 1.5 pF per channel, 5 V VRWM; integrated dual-diode array in UQFN-6; no AEC-Q101 rating. | Designed for high-speed digital interfaces (e.g., USB 3.0, MIPI); not rated for automotive under-hood use. | Choose TPD2E001DRYR for multi-line, low-capacitance protection in consumer electronics where AEC-Q101 is not required. |
Compared with SMAJ11A-E3/5A and TPD2E001DRYR, SMF11A-HM3_A18 uniquely balances ultra-low profile (1.08 mm), AEC-Q101 qualification, and 509 pF capacitance - making it optimal for space-constrained automotive and industrial signal line protection where both ESD robustness and mechanical fit are critical.
Availability
SMF11A-HM3_A18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line safeguarding, and industrial I/O port hardening requiring stable component supply across automotive Tier-1 production programs and industrial automation OEMs.
Supply support for SMF11A-HM3_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 Intertechnology is a global manufacturer of discrete semiconductors and passive components, specializing in high-reliability solutions for automotive, industrial, and computing markets.
The SMF series targets high-speed interface protection with AEC-Q101 qualification, low capacitance, and compact packaging - engineered specifically for ESD-critical signal paths in automotive infotainment, ADAS, and industrial control systems.
FAQ
What is the clamping voltage of SMF11A-HM3_A18 at its rated peak pulse current?
The SMF11A-HM3_A18 has a maximum clamping voltage (VC) of 18.2 V at its rated peak pulse current (IPPM) of 11 A under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet and ensures downstream ICs remain within safe voltage limits during transient events. The clamping performance is consistent across the full operating temperature range of –65 °C to +175 °C.
Is SMF11A-HM3_A18 qualified for automotive applications?
Yes, SMF11A-HM3_A18 is AEC-Q101 qualified, meeting rigorous stress tests for automotive-grade reliability including human body model ESD >8 kV, temperature cycling, and high-temperature operating life. It is rated for continuous operation from –65 °C to +175 °C, making it suitable for under-hood and infotainment applications. The qualification applies directly to the SMF11A-HM3_A18 part number as shipped by Vishay.
What package type does SMF11A-HM3_A18 use, and is it compatible with standard SOD-123W footprints?
SMF11A-HM3_A18 uses the DO-219AB (SMF) package - a 3.9 mm × 1.9 mm × 1.08 mm low-profile surface-mount outline. Vishay explicitly states compatibility with SOD-123W, SOD-123F, and SOD-123FL land patterns. Its dimensions and terminal geometry allow direct placement on existing SOD-123W PCB footprints without layout modification.
Does SMF11A-HM3_A18 meet IEC 61000-4-2 ESD immunity requirements?
Yes, SMF11A-HM3_A18 delivers ±30 kV contact discharge and ±30 kV air discharge immunity per IEC 61000-4-2, exceeding Level 4 requirements. This rating is verified per the Vishay datasheet Rev. 2.4 (04-Jul-2023) and confirmed through standardized 10-pulse testing. The device maintains electrical parameters post-test with no parametric shift or functional failure.
What is the typical capacitance of SMF11A-HM3_A18, and how does it affect high-speed signal integrity?
The SMF11A-HM3_A18 exhibits 509 pF typical capacitance at 0 V and 1 MHz. This value is measured per Vishay's characterization and supports reliable operation on interfaces up to 480 Mbps (e.g., USB 2.0 full-speed). While higher than some ultra-low-capacitance arrays, it avoids signal distortion in moderate-speed lines and remains well below thresholds that cause measurable eye diagram closure in compliant PCB layouts.
SMF11A-HM3_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-HM3_A18 FAQ
1.How can I place an order for SMF11A-HM3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF11A-HM3_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-HM3_A18 reliable?
The price and inventory of SMF11A-HM3_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-HM3_A18 is usually 5 days.
3.What payment methods are accepted for SMF11A-HM3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF11A-HM3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF11A-HM3_A18?
SMF11A-HM3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF11A-HM3_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-HM3_A18?
For technical support, including SMF11A-HM3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF11A-HM3_A18 requirements.
6.How does Aetrix verify that SMF11A-HM3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF11A-HM3_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-HM3_A18 meets industry standards.
7.What is the process for return or replacement of SMF11A-HM3_A18?
All SMF11A-HM3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF11A-HM3_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-HM3_A18 part is unused and in its original packaging.
Return procedure for SMF11A-HM3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF11A-HM3_A18 Tags
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