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Vishay SMF8V5A-HM3_A18
- Part No.:
- SMF8V5A-HM3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF8V5A-HM3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,150
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Product details
Overview
SMF8V5A-HM3_A18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient suppression on high-speed data lines. It features a 9.44 V minimum reverse breakdown voltage, 8.5 V maximum stand-off voltage, 13.9 A peak pulse current (10/1000 μs), 14.4 V maximum clamping voltage at IPPM, and 674 pF typical junction capacitance at 0 V - optimized for USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF8V5A-HM3_A18 datasheet, SMF8V5A-HM3_A18 pinout, SMF8V5A-HM3_A18 application, or SMF8V5A-HM3_A18 equivalent, this device delivers verified ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification, and low-noise fast response for robust signal-line protection in automotive infotainment and industrial IoT edge nodes.
Technical Context
This unidirectional TVS diode operates as a clamping device in series with signal paths, activating when transient voltage exceeds its reverse stand-off threshold of 8.5 V. Its low 674 pF capacitance minimizes signal distortion on 480 Mbps USB 2.0 lines, while the 14.4 V clamping voltage ensures downstream ICs remain within safe operating limits during 200 W (10/1000 μs) surges.
The SMF8V5A-HM3_A18 uses silicon avalanche technology with "Low Noise" fast-response design, achieving sub-nanosecond turn-on to suppress ESD events before damage occurs. It is qualified to AEC-Q101 for automotive under-hood and infotainment applications and rated for continuous operation from –65 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage | 8.5 V - maximum reverse working voltage before clamping begins; sets upper limit for normal signal swing without leakage |
| Breakdown Voltage (min) | 9.44 V - guaranteed avalanche initiation threshold at 1 mA test current; defines minimum overvoltage trigger point |
| Clamping Voltage (max) | 14.4 V at 13.9 A - maximum voltage seen by protected circuit during worst-case 10/1000 μs surge; critical for IC survival |
| Junction Capacitance | 674 pF at 0 V, 1 MHz - low enough to avoid signal integrity degradation on USB 2.0 and CAN FD data lines |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 requirements for industrial and automotive end-equipment |
| Peak Pulse Power | 200 W (10/1000 μs) - sustains short-duration transients common in board-level ESD events without degradation |
| Operating Temp Range | –65 °C to +175 °C - supports under-hood automotive, industrial motor control, and aerospace environments |
Pinout & Package
SMF8V5A-HM3_A18 is housed in the DO-219AB (SOD-123W-compatible) surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, MSL level 1, wave/reflow solderable. Cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line | Connected to signal source or connector; carries transient current into diode during clamping |
| Cathode | Ground reference node | Connected to system ground plane; completes clamping path and determines polarity of protection |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-2 ESD and IEC 61000-4-4 EFT events on 3.3 V/5 V buses |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for external spark gaps or multi-stage protection in cost-sensitive consumer and industrial designs |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress - suitable for ADAS camera links |
| 674 pF junction capacitance | Preserves signal rise time on 480 Mbps USB 2.0 differential pairs without measurable eye diagram closure |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision versus standard TVS diodes |
Applications
| USB 2.0 Data Lines | HDMI DDC Channel |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D– lines against ESD from hot-plug connectors in portable medical devices. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed directly at USB receptacle, shunting transients to chassis ground. Use Value: 674 pF capacitance avoids signal integrity loss at 480 Mbps; ±30 kV rating meets IEC 61000-4-2 Level 4 compliance. |
Use Scenario: Safeguarding HDMI DDC (I²C) lines in digital signage controllers exposed to field service ESD events. IC Role / Device Role / Timing Role: Standoff-limited TVS on 3.3 V SDA/SCL lines, operating below 8.5 V normal mode voltage. Use Value: 8.5 V VRWM prevents interference with 3.3 V logic levels while clamping 14.4 V surges to protect HDMI PHY ICs. |
| Automotive Infotainment | Industrial Sensor Interface |
Use Scenario: ESD protection for LVDS video links between head unit and rear-seat display in vehicles. IC Role / Device Role / Timing Role: Single-channel unidirectional TVS on each LVDS pair, mounted adjacent to connector. Use Value: AEC-Q101 qualification ensures reliability across –40 °C to +105 °C ambient; 175 °C junction rating handles local heating. |
Use Scenario: Transient suppression on RS-485 bus lines in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Line-to-ground clamping device on A/B differential inputs, referenced to isolated system ground. Use Value: 200 W pulse rating withstands lightning-induced surges per IEC 61000-4-5; 14.4 V VC protects MAX1487-level transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A-E3/5A | Higher 15.0 V clamping voltage (at 12.3 A), larger SMA package (4.5 mm × 2.7 mm), 1000 W peak power (8/20 μs) | Better suited for higher-energy surges (e.g., IEC 61000-4-5), but excessive capacitance (1000 pF) limits USB/HDMI use | Select when surge energy exceeds 200 W and board space allows larger footprint; not recommended for high-speed data lines |
| TPD2E007DRYR | 2-channel bidirectional array, 11 pF capacitance, ±8 kV HBM, 3.6 V VRWM - designed for USB Type-C CC lines | Optimized for ultra-low-capacitance dual-line protection; lacks AEC-Q101 rating and ±30 kV IEC 61000-4-2 rating | Prefer for space-constrained USB-C port protection where ESD level ≤ ±8 kV suffices; not drop-in for automotive or industrial ESD-critical zones |
Compared with SMAJ8.5A-E3/5A and TPD2E007DRYR, SMF8V5A-HM3_A18 uniquely balances automotive-grade reliability (AEC-Q101), ±30 kV ESD immunity, and 674 pF capacitance - making it the only option among the three qualified for high-speed data line protection in harsh-environment automotive and industrial systems.
Availability
SMF8V5A-HM3_A18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive infotainment subsystems, and industrial RS-485 sensor networks requiring stable component supply and long-term lifecycle assurance.
Supply support for SMF8V5A-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets compact, high-performance ESD protection for high-speed digital interfaces - engineered for AEC-Q101 compliance, low capacitance, and repeatable clamping behavior in mission-critical signal paths.
FAQ
What is the maximum clamping voltage of SMF8V5A-HM3_A18 under a 10/1000 μs surge?
The SMF8V5A-HM3_A18 has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current of 13.9 A using the 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and guarantees that protected downstream ICs experience no more than 14.4 V during such transients - a key parameter for ensuring compatibility with 3.3 V or 5 V logic families. The SMF8V5A-HM3_A18 maintains this performance across its full operating temperature range.
Is SMF8V5A-HM3_A18 qualified for automotive applications?
Yes, SMF8V5A-HM3_A18 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness required for automotive electronics. It supports operating temperatures from –65 °C to +175 °C and is commonly deployed in infotainment displays, ADAS camera links, and body control modules. The SMF8V5A-HM3_A18 meets automotive ESD immunity requirements per ISO 10605 and complements IEC 61000-4-2 testing at ±30 kV.
What is the junction capacitance of SMF8V5A-HM3_A18 and why does it matter?
The SMF8V5A-HM3_A18 exhibits 674 pF typical junction capacitance at 0 V and 1 MHz, measured per the manufacturer's electrical characteristics table. This low capacitance is essential for preserving signal integrity on high-speed interfaces like USB 2.0 (480 Mbps) and HDMI DDC lines - minimizing rise-time degradation and bit-error rate increase. Higher capacitance would load the line excessively, causing reflection and timing violations. The SMF8V5A-HM3_A18 achieves this balance without sacrificing ESD robustness.
How does SMF8V5A-HM3_A18 differ from bidirectional TVS diodes?
SMF8V5A-HM3_A18 is a unidirectional TVS diode, meaning it conducts only during negative transients relative to its cathode - ideal for protecting DC-biased signal lines like USB D+ or RS-485 A/B where polarity is fixed. Bidirectional variants (e.g., SMF8.5CA) clamp both polarities but exhibit higher capacitance and lower stand-off margin. The SMF8V5A-HM3_A18's 8.5 V VRWM and 9.44 V VBR(min) provide tighter voltage margin for 5 V systems, and its unidirectional architecture improves leakage control and clamping consistency compared to bidirectional equivalents.
What packaging and assembly compatibility does SMF8V5A-HM3_A18 support?
SMF8V5A-HM3_A18 uses the DO-219AB (SOD-123W-compatible) package: 3.9 mm × 1.9 mm × 1.08 mm, with MSL level 1 rating and compatibility with standard reflow and wave soldering profiles (peak temperature ≤ 260 °C). Its footprint matches JEDEC MO-203-AB, enabling drop-in replacement for other SOD-123W devices. The SMF8V5A-HM3_A18 is supplied on 8 mm tape-and-reel (10K per 13″ reel, part code _A18), supporting automated SMT placement in high-volume manufacturing.
SMF8V5A-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 13.9A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 674pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF8V5A-HM3_A18 FAQ
1.How can I place an order for SMF8V5A-HM3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF8V5A-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 SMF8V5A-HM3_A18 reliable?
The price and inventory of SMF8V5A-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 SMF8V5A-HM3_A18 is usually 5 days.
3.What payment methods are accepted for SMF8V5A-HM3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF8V5A-HM3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF8V5A-HM3_A18?
SMF8V5A-HM3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF8V5A-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 SMF8V5A-HM3_A18?
For technical support, including SMF8V5A-HM3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF8V5A-HM3_A18 requirements.
6.How does Aetrix verify that SMF8V5A-HM3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF8V5A-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 SMF8V5A-HM3_A18 meets industry standards.
7.What is the process for return or replacement of SMF8V5A-HM3_A18?
All SMF8V5A-HM3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF8V5A-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 SMF8V5A-HM3_A18 part is unused and in its original packaging.
Return procedure for SMF8V5A-HM3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF8V5A-HM3_A18 Tags
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