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Vishay SMF14A-HM3_A18
- Part No.:
- SMF14A-HM3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF14A-HM3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,526
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Product details
Overview
SMF14A-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 14 V stand-off voltage (VRWM), 23.2 V maximum clamping voltage at 8.6 A peak pulse current, 392 pF typical capacitance at 0 V, ±30 kV IEC 61000-4-2 ESD immunity, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMF14A-HM3_A18 datasheet, SMF14A-HM3_A18 pinout, SMF14A-HM3_A18 application, or SMF14A-HM3_A18 equivalent, this device is selected for robust electrostatic discharge protection in USB 2.0, HDMI, automotive infotainment interfaces, and industrial sensor signal conditioning where low clamping voltage and controlled capacitance are critical.
Technical Context
The SMF14A-HM3_A18 operates as a single-channel unidirectional TVS diode with avalanche breakdown behavior, optimized for fast response (<1 ns) to ESD transients per IEC 61000-4-2. Its low incremental surge resistance ensures minimal voltage overshoot during 8.6 A (10/1000 μs) surges, while its 392 pF junction capacitance supports signal integrity in sub-100 MHz applications.
It is rated for continuous operation from –65 °C to +175 °C, qualified to AEC-Q101 for automotive under-hood and infotainment systems, and compatible with standard SOD-123W footprint layouts despite its DO-219AB case outline - enabling drop-in replacement in legacy SOD-123 designs with enhanced power handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 14 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 12 V nominal bus lines. |
| Clamping Voltage (VC) | 23.2 V at 8.6 A (10/1000 μs) - peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| Peak Pulse Power (PPP) | 200 W (10/1000 μs) - transient energy absorption capability without failure; sufficient for IEC 61000-4-5 Level 2 surges. |
| Junction Capacitance (CD) | 392 pF at 0 V, 1 MHz - directly impacts signal rise time and insertion loss; suitable for USB 2.0 (480 Mbps) and CAN FD interfaces. |
| ESD Withstand | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds automotive electronics immunity requirements for human interaction points. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HBM >8 kV, and mechanical robustness per JESD22 standards. |
Pinout & Package
The SMF14A-HM3_A18 uses the DO-219AB (SMF) package: low-profile (1.08 mm max height), molded epoxy case with cathode band marking, compatible with SOD-123W footprint and reflow soldering (peak 260 °C). Weight: 15 mg; dimensions: 3.9 × 1.9 × 1.08 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to signal line requiring ESD protection; conducts during positive transients when referenced to cathode. |
| Cathode | Ground reference | Connected to system ground or low-impedance return path; defines unidirectional clamping polarity and sets VRWM threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping voltage | 23.2 V at 8.6 A enables protection of 15 V-rated interface ICs without overvoltage damage. |
| Fast response time | <1 ns reaction to ESD events ensures clamping occurs before sensitive logic thresholds are exceeded. |
| Automotive qualification | AEC-Q101 compliance guarantees performance across -65 °C to +175 °C ambient and mechanical shock/vibration environments. |
| Reflow-compatible packaging | DO-219AB case withstands JEDEC J-STD-020 MSL level 1 conditions - no bake required prior to assembly. |
Applications
| USB 2.0 Data Lines | HDMI Hot-Plug Detection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable USB peripherals against user-handling ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between each data line and chassis ground to clamp transients before reaching USB transceiver. Use Value: 392 pF capacitance avoids signal integrity degradation at 480 Mbps; 23.2 V clamping prevents damage to 3.3 V tolerant PHY inputs. | Use Scenario: Safeguarding HDMI CEC and HPD pins in display controllers during cable insertion/removal. IC Role / Device Role / Timing Role: Standoff-rated ESD suppressor tied between HPD line and ground, holding 14 V DC bias while blocking transients. Use Value: 14 V VRWM matches typical HPD pull-up voltage; ±30 kV ESD rating exceeds IEC 61000-4-2 requirement for consumer interface ports. |
| Automotive Infotainment Display | Industrial RS-485 Transceivers |
Use Scenario: Shielding LVDS or FPD-Link clock/data lanes in center-stack displays exposed to cabin ESD sources. IC Role / Device Role / Timing Role: Single-channel unidirectional suppressor on each signal line, leveraging AEC-Q101 qualification for under-dash mounting. Use Value: 175 °C max junction temperature supports placement near heat-generating SoCs; DO-219AB footprint fits tight board spacing. | Use Scenario: Protecting RS-485 receiver inputs in factory automation nodes connected to long, noise-prone field wiring. IC Role / Device Role / Timing Role: Line-to-ground TVS element on A/B differential inputs, absorbing induced surges from nearby motor switching. Use Value: 200 W peak pulse power handles repetitive 10/1000 μs transients; low IR (0.1 μA at 14 V) avoids loading bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/5A | Higher clamping voltage (25.7 V at 7.6 A); SMA (DO-214AC) package; 500 pF capacitance. | Less suitable for high-speed interfaces due to higher capacitance and slower response; better for lower-frequency power rail protection. | Select SMAJ14A-E3/5A only if board space allows larger SMA package and signal bandwidth is below 20 MHz. |
| TPD2E001DRYR | Bi-directional dual-channel array; 12 pF capacitance; integrated 5 V DC blocking; not AEC-Q101 qualified. | Optimized for USB 2.0 data lines with ultra-low capacitance but lacks automotive qualification and standalone surge rating. | Choose TPD2E001DRYR for consumer USB ports where size and capacitance dominate; avoid in automotive or high-energy surge environments. |
Compared with SMAJ14A-E3/5A and TPD2E001DRYR, the SMF14A-HM3_A18 delivers superior balance of low clamping (23.2 V), moderate capacitance (392 pF), AEC-Q101 qualification, and compact DO-219AB packaging - making it optimal for automotive and industrial serial interface protection where reliability and layout density are both critical.
Availability
SMF14A-HM3_A18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and USB 2.0 peripheral designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant ESD protection.
Supply support for SMF14A-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 Semiconductors is a global leader in discrete semiconductors, specializing in power management, sensing, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMF series targets high-reliability transient suppression in automotive, industrial, and computing interfaces - engineered for low clamping, fast response, and seamless integration into automated SMT assembly lines.
FAQ
What is the maximum clamping voltage of the SMF14A-HM3_A18 under standard test conditions?
The SMF14A-HM3_A18 has a maximum clamping voltage (VC) of 23.2 V when subjected to an 8.6 A peak pulse current with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuits during surge events. The SMF14A-HM3_A18 maintains this clamping performance across its full operating temperature range.
Is the SMF14A-HM3_A18 qualified for automotive applications?
Yes, the SMF14A-HM3_A18 is AEC-Q101 qualified, confirming its suitability for automotive electronics including infotainment, body control modules, and ADAS sensor interfaces. It meets requirements for temperature cycling, mechanical shock, humidity, and ESD robustness. The SMF14A-HM3_A18 is rated for operation from –65 °C to +175 °C, supporting under-hood and cabin deployment.
What package type does the SMF14A-HM3_A18 use, and is it compatible with standard SMT processes?
The SMF14A-HM3_A18 uses the DO-219AB (SMF) package - a low-profile surface-mount case measuring 3.9 × 1.9 × 1.08 mm with cathode band marking. It is fully compatible with wave and reflow soldering per JEDEC J-STD-020 MSL level 1, with peak temperature tolerance up to 260 °C. The SMF14A-HM3_A18 footprint aligns with SOD-123W land patterns.
How does the capacitance of the SMF14A-HM3_A18 affect high-speed signal integrity?
The SMF14A-HM3_A18 exhibits 392 pF typical junction capacitance at 0 V and 1 MHz, which introduces measurable loading on high-speed lines. It is appropriate for USB 2.0 (480 Mbps) and RS-485 applications but not recommended for USB 3.0 or HDMI 2.0+. Signal integrity impact must be verified via IBIS simulation or TDR measurement in the final layout. The SMF14A-HM3_A18's capacitance remains stable across bias voltage, aiding predictable design.
What is the ESD protection rating of the SMF14A-HM3_A18, and how is it tested?
The SMF14A-HM3_A18 provides ±30 kV contact discharge and ±30 kV air discharge ESD immunity per IEC 61000-4-2, verified using 10 pulses per polarity. This rating exceeds standard automotive and industrial requirements and reflects the device's "Low Noise" technology enabling sub-nanosecond response. The SMF14A-HM3_A18 sustains this performance after repeated ESD stress without parameter shift or failure.
SMF14A-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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 392pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF14A-HM3_A18 FAQ
1.How can I place an order for SMF14A-HM3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF14A-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 SMF14A-HM3_A18 reliable?
The price and inventory of SMF14A-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 SMF14A-HM3_A18 is usually 5 days.
3.What payment methods are accepted for SMF14A-HM3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF14A-HM3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF14A-HM3_A18?
SMF14A-HM3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF14A-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 SMF14A-HM3_A18?
For technical support, including SMF14A-HM3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF14A-HM3_A18 requirements.
6.How does Aetrix verify that SMF14A-HM3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF14A-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 SMF14A-HM3_A18 meets industry standards.
7.What is the process for return or replacement of SMF14A-HM3_A18?
All SMF14A-HM3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF14A-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 SMF14A-HM3_A18 part is unused and in its original packaging.
Return procedure for SMF14A-HM3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF14A-HM3_A18 Tags
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