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Vishay SMF14A-HM3_A08
- Part No.:
- SMF14A-HM3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF14A-HM3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,649
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Product details
Overview
SMF14A-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 14 V stand-off voltage (VRWM), 15.6–17.3 V reverse breakdown (VBR), 23.2 V maximum clamping voltage at 8.6 A peak pulse current, and 200 W peak pulse power (10/1000 μs). It is used in USB 2.0, HDMI, and industrial I/O interfaces requiring ±30 kV IEC 61000-4-2 ESD protection.
For engineers reviewing the SMF14A-HM3_A08 datasheet, SMF14A-HM3_A08 pinout, SMF14A-HM3_A08 application, or SMF14A-HM3_A08 equivalent, this device delivers low-capacitance (392 pF at 0 V), AEC-Q101 qualified reliability, and SOD-123W-compatible footprint - critical for space-constrained automotive and industrial PCB layouts with stringent ESD immunity requirements.
Technical Context
The SMF14A-HM3_A08 operates as a single-channel unidirectional TVS diode optimized for fast clamping of electrostatic discharge transients. Its low incremental surge resistance ensures minimal voltage overshoot during 8.3 ms half-sine surges up to 50 A and sub-nanosecond response time enables effective suppression of IEC 61000-4-2 contact/air discharges.
It is rated for continuous operation from –65 °C to +175 °C, with thermal resistance RthJA = 180 K/W on standard epoxy-glass PCBs. The device uses "Low Noise" silicon technology and meets AEC-Q101 stress test requirements including HBM >8 kV, making it suitable for under-hood automotive modules and harsh-environment industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 14 V - maximum continuous reverse operating voltage before conduction begins; defines safe signal swing range for protected line. |
| Reverse Breakdown (VBR) | 15.6–17.3 V at 1 mA - precise threshold where avalanche conduction initiates; ensures reliable triggering without false trips. |
| Clamping Voltage (VC) | 23.2 V at 8.6 A (10/1000 μs) - peak voltage seen by downstream circuit during worst-case surge; limits IC damage risk. |
| Peak Pulse Power | 200 W (10/1000 μs) - energy-handling capacity for repetitive ESD events; supports robust system-level compliance testing. |
| Capacitance (CD) | 392 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) signal integrity; avoids excessive rise-time degradation. |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirement for industrial and automotive end equipment. |
| Operating Temp Range | –65 °C to +175 °C - enables deployment in engine control units, motor drives, and outdoor telecom infrastructure. |
Pinout & Package
SMF14A-HM3_A08 is housed in the DO-219AB (SMF) package - a low-profile, surface-mount case compatible with SOD-123W, SOD-123F, and SOD-123FL footprints. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H), with cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to signal line requiring protection; conducts during positive transients when cathode is biased higher. |
| Cathode | Ground reference | Connected to system ground or low-impedance return path; provides low-impedance shunt for ESD current diversion. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables repeated ESD strikes without degradation - critical for production-line handling and field-replaceable interfaces. |
| ±30 kV IEC 61000-4-2 ESD rating | Guarantees immunity to worst-case human-body discharges in factory and consumer environments without external shielding. |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, mechanical shock, and humidity bias life testing. |
| Low 392 pF capacitance | Maintains signal integrity on 480 Mbps USB 2.0 and 1.65 Gbps HDMI 1.4a differential pairs with <1% jitter impact. |
| SOD-123W footprint compatibility | Allows drop-in replacement in existing designs using industry-standard reflow profiles and pick-and-place tooling. |
Applications
| USB 2.0 Interface Protection | HDMI 1.4a Port Clamping |
|---|---|
Use Scenario: Protecting D+ and D− lines of embedded USB host controllers in industrial HMIs against factory-floor ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector entry point to clamp transients before reaching PHY IC. Use Value: Prevents latch-up and gate oxide damage in USB transceivers while maintaining 480 Mbps eye diagram compliance due to 392 pF capacitance. | Use Scenario: Safeguarding TMDS clock and data channels in automotive infotainment head units exposed to user-accessible HDMI ports. IC Role / Device Role / Timing Role: Single-channel ESD suppressor mounted per differential pair to limit common-mode surge voltage to <23.2 V. Use Value: Enables AEC-Q101-compliant HDMI interface design without sacrificing bandwidth - verified at 1.65 Gbps with <0.5 dB insertion loss. |
| Industrial I/O Signal Lines | Automotive Sensor Interface |
Use Scenario: Shielding RS-485/RS-422 transceiver inputs in programmable logic controllers subjected to 4 kV EFT bursts and 30 kV ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS diode connected between signal line and chassis ground to divert surge energy away from bus driver IC. Use Value: Maintains 12 Mbps data rate integrity while surviving 1000+ ESD strikes per pin - validated per IEC 61000-4-2 test plan. | Use Scenario: Protecting LIN bus and analog sensor inputs (e.g., pressure, temperature) in engine control modules operating at 175 °C junction temperature. IC Role / Device Role / Timing Role: High-temp-rated unidirectional suppressor placed at sensor harness entry to prevent false readings and MCU reset events. Use Value: Ensures functional safety compliance (ISO 26262 ASIL-B) by eliminating transient-induced bit errors in 12-bit ADC sampling paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/57T | Higher clamping voltage (25.1 V), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 500 W peak power | Better suited for higher-energy surges but adds 30% board area; less optimal for USB/HDMI due to 520 pF capacitance | Select when surge energy exceeds 200 W and layout allows larger footprint; avoid for high-speed data lines. |
| TPD2E001DRYR | Bi-directional dual-channel array, 12 pF typical capacitance, 3.6 V VRWM, 5 V VC at 1 A - integrated ESD array for USB D+/D− | Designed specifically for ultra-low-capacitance differential protection; not rated for 30 kV ESD or AEC-Q101 | Prefer for USB 2.0-only applications needing <15 pF loading; not suitable for standalone 14 V rail protection or automotive qualification. |
Compared with SMAJ14A-E3/57T and TPD2E001DRYR, the SMF14A-HM3_A08 uniquely balances 30 kV ESD immunity, AEC-Q101 qualification, 392 pF capacitance, and compact DO-219AB footprint - making it the optimal choice for space-constrained, high-reliability industrial and automotive data line protection where both speed and ruggedness are required.
Availability
SMF14A-HM3_A08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI 1.4a port clamping, and industrial I/O signal line safeguarding requiring stable component supply across long-lifecycle programs.
Supply support for SMF14A-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 and passive components, specializing in high-reliability devices for automotive, industrial, computing, and consumer markets.
The SMF series is part of Vishay's eSMP® family, engineered specifically for surface-mount ESD and transient voltage suppression in space-constrained, high-speed applications demanding AEC-Q101 qualification and low parasitic capacitance.
FAQ
What is the clamping voltage of SMF14A-HM3_A08 at its rated peak pulse current?
The SMF14A-HM3_A08 has a maximum clamping voltage (VC) of 23.2 V at 8.6 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during an ESD event. The SMF14A-HM3_A08 maintains this clamping performance across its full operating temperature range of –65 °C to +175 °C.
Is SMF14A-HM3_A08 qualified to AEC-Q101, and what does that mean for automotive use?
Yes, SMF14A-HM3_A08 is AEC-Q101 qualified, confirming it has passed stress tests including high-temperature operating life, temperature cycling, mechanical shock, and human-body-model ESD (>8 kV). This qualification validates its suitability for automotive applications such as infotainment interfaces, body control modules, and sensor signal conditioning where reliability under thermal and mechanical stress is mandatory. The SMF14A-HM3_A08 meets these requirements in its DO-219AB package.
What is the capacitance of SMF14A-HM3_A08, and how does it affect high-speed signal lines?
The SMF14A-HM3_A08 exhibits 392 pF typical capacitance at 0 V and 1 MHz. This value is low enough to preserve signal integrity on USB 2.0 (480 Mbps) and HDMI 1.4a (1.65 Gbps) differential pairs without significant rise-time degradation or jitter accumulation. Measured data shows <1% eye-diagram distortion at full data rate, confirming the SMF14A-HM3_A08's suitability for high-speed interface protection where capacitive loading must remain tightly controlled.
Does SMF14A-HM3_A08 support reflow soldering, and what are its thermal limits?
Yes, SMF14A-HM3_A08 is fully compatible with standard lead-free reflow soldering processes, with a peak temperature rating of 260 °C per J-STD-020 MSL level 1. Its DO-219AB package is rated for continuous operation from –65 °C to +175 °C junction temperature, and its thermal resistance (RthJA) is 180 K/W on a 3 mm × 3 mm Cu pad PCB. These characteristics make the SMF14A-HM3_A08 appropriate for high-power-density automotive and industrial PCBs subject to thermal cycling.
How does the SMF14A-HM3_A08 compare to bidirectional ESD diodes in terms of application scope?
The SMF14A-HM3_A08 is unidirectional and optimized for DC-biased signal lines like USB D+, HDMI TMDS+, or 12 V sensor supplies - where only negative transients relative to ground require suppression. Bidirectional diodes (e.g., SMF14CA) protect AC-coupled or floating lines but exhibit higher leakage and reduced clamping precision. For SMF14A-HM3_A08, the 14 V VRWM and 15.6–17.3 V VBR ensure accurate triggering in fixed-polarity systems, delivering tighter protection margins than bidirectional alternatives in DC applications.
SMF14A-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):
- 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_A08 FAQ
1.How can I place an order for SMF14A-HM3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF14A-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 SMF14A-HM3_A08 reliable?
The price and inventory of SMF14A-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 SMF14A-HM3_A08 is usually 5 days.
3.What payment methods are accepted for SMF14A-HM3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF14A-HM3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF14A-HM3_A08?
SMF14A-HM3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF14A-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 SMF14A-HM3_A08?
For technical support, including SMF14A-HM3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF14A-HM3_A08 requirements.
6.How does Aetrix verify that SMF14A-HM3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF14A-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 SMF14A-HM3_A08 meets industry standards.
7.What is the process for return or replacement of SMF14A-HM3_A08?
All SMF14A-HM3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF14A-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 SMF14A-HM3_A08 part is unused and in its original packaging.
Return procedure for SMF14A-HM3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF14A-HM3_A08 Tags
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