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Vishay SMF8V5A-HE3_A08
- Part No.:
- SMF8V5A-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF8V5A-HE3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,575
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Product details
Overview
SMF8V5A-HE3_A08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient voltage suppression in 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 I/O port protection.
For engineers reviewing the SMF8V5A-HE3_A08 datasheet, SMF8V5A-HE3_A08 pinout, SMF8V5A-HE3_A08 application, or SMF8V5A-HE3_A08 equivalent, key selection criteria include clamping voltage under 15 V, sub-1 nF capacitance for signal integrity, ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification status, and compatibility with SOD-123W footprint layouts.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche technology to clamp transient overvoltages before they damage downstream ICs. Its low incremental surge resistance ensures rapid response (<1 ns) and minimal voltage overshoot during ESD events.
Designed for placement directly at I/O connectors or interface pins, it supports bidirectional signal paths only when paired with complementary devices; standalone use protects against positive transients relative to ground. Thermal resistance of 180 K/W enables reliable operation up to 175 °C junction temperature under defined PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage | 8.5 V - maximum continuous reverse operating voltage before leakage exceeds 0.1 μA, ensuring no interference with 8 V nominal bus signals. |
| Breakdown Voltage | 9.44–10.5 V - guaranteed avalanche conduction onset range at 1 mA test current, enabling precise overvoltage thresholding. |
| Clamping Voltage | 14.4 V max at 13.9 A - limits transient voltage seen by protected ICs to safe levels during 10/1000 μs surges. |
| Junction Capacitance | 674 pF at 0 V - low enough for USB 2.0 (480 Mbps) and RS-485 interfaces without signal 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 (SOD-123W compatible) - 3.9 × 1.9 × 1.08 mm low-profile outline supporting automated assembly and high-density PCB layouts. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HBM >8 kV, enabling use in infotainment and body control modules. |
Pinout & Package
The SMF8V5A-HE3_A08 uses a 2-terminal DO-219AB (SOD-123W-compatible) surface-mount package with cathode marked by a bar on the top surface. The device is polarity-sensitive: anode connects to the protected line, cathode to ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Protected Line Input | Connected directly to the signal or power line requiring ESD protection; carries normal operating current and diverts surge energy to ground via cathode. |
| Cathode (bar-marked end) | Ground Reference | Low-inductance connection point to system ground plane; critical for achieving specified clamping performance and ESD discharge path integrity. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W Peak Pulse Power (10/1000 μs) | Enables robust protection against repetitive EFT bursts and lightning-induced surges in industrial control systems without thermal runaway. |
| "Low Noise" Fast Response Technology | Sub-nanosecond turn-on time minimizes voltage overshoot during ESD strikes, preserving signal integrity in high-speed digital interfaces. |
| Wave & Reflow Solderable | Compatible with standard Pb-free reflow profiles (peak ≤260 °C), eliminating manual soldering steps and supporting high-volume manufacturing. |
| MSL Level 1 Moisture Sensitivity | Zero bake requirement before assembly, reducing production delays and handling complexity in humid environments. |
| UL 94 V-0 Molding Compound | Self-extinguishing encapsulation meets fire-safety standards for consumer electronics and medical devices. |
Applications
| USB 2.0 Data Lines | HDMI Interface Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable USB peripherals against electrostatic discharge during hot-plug events. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed immediately adjacent to the USB connector, clamping ESD transients before they reach the USB transceiver IC. Use Value: Maintains signal fidelity with 674 pF capacitance while delivering ±30 kV contact ESD immunity - meeting USB-IF compliance requirements without compromising data rate. | Use Scenario: Safeguarding TMDS clock and data channels in HDMI source devices (e.g., set-top boxes, GPUs) from user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS diode installed per-channel at HDMI receptacle, referenced to chassis ground to suppress common-mode transients. Use Value: Clamps transients to ≤14.4 V within nanoseconds, preventing latch-up or damage to HDMI PHYs operating at 3.3 V supply rails. |
| Industrial I/O Ports | Automotive Infotainment Displays |
Use Scenario: Protecting RS-485/RS-232 communication ports on PLC modules exposed to field wiring ESD and inductive switching noise. IC Role / Device Role / Timing Role: Standalone unidirectional suppressor on each signal line, grounded through short PCB traces to minimize inductance and ensure effective clamping. Use Value: Withstands 13.9 A surge current and maintains stable clamping across -65 °C to +175 °C, supporting extended temperature operation in factory automation. | Use Scenario: Shielding LVDS video data lanes between head unit and center display from ESD generated during vehicle service or passenger interaction. IC Role / Device Role / Timing Role: AEC-Q101 qualified TVS diode mounted at display connector, providing fail-safe protection without degrading 1.2 Gbps pixel clock timing. Use Value: Delivers automotive-grade reliability with <0.1 μA leakage at 8.5 V and verified HBM >8 kV performance, satisfying ISO 10605 and OEM component specifications. |
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 | Higher clamping voltage (14.4 V vs. 15.0 V), larger SMA package (4.5 × 2.7 mm), 600 pF capacitance | Less suitable for high-speed interfaces due to higher parasitic inductance and larger footprint | Prefer SMF8V5A-HE3_A08 for space-constrained, high-frequency designs; SMAJ8.5A acceptable for lower-speed DC power rail protection. |
| TPD2E001DRYR | Bi-directional dual-channel array, 15 pF capacitance, integrated 5 V DC blocking, smaller 1.4 × 1.0 mm X2SON package | Optimized for ultra-high-speed USB 3.0/Type-C but lacks AEC-Q101 rating and 30 kV ESD rating | Choose SMF8V5A-HE3_A08 for automotive or industrial applications requiring highest ESD immunity and temperature range; TPD2E001DRYR for consumer USB 3.0 where ultra-low capacitance is critical. |
Compared with SMAJ8.5A and TPD2E001DRYR, the SMF8V5A-HE3_A08 uniquely balances 30 kV ESD immunity, AEC-Q101 qualification, and 674 pF capacitance in a compact DO-219AB package - making it optimal for cost-sensitive, high-reliability industrial and automotive I/O protection where moderate speed and extreme ruggedness are prioritized.
Availability
SMF8V5A-HE3_A08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI channel safeguarding, and industrial RS-485 port hardening requiring stable component supply across multi-year production cycles.
Supply support for SMF8V5A-HE3_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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with leadership in power management, signal conditioning, and circuit protection technologies.
The SMF series is part of Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for high-efficiency, low-profile ESD and surge protection in space-constrained, high-reliability applications across automotive, industrial, and computing markets.
FAQ
What is the maximum clamping voltage of the SMF8V5A-HE3_A08 under a 13.9 A transient?
The SMF8V5A-HE3_A08 has a maximum clamping voltage of 14.4 V when subjected to its rated 13.9 A peak pulse current (10/1000 μs waveform). This value is measured at the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuits during surge events. The SMF8V5A-HE3_A08 achieves this clamping performance while maintaining low incremental surge resistance, ensuring consistent protection behavior across its operational temperature range.
Is the SMF8V5A-HE3_A08 qualified to AEC-Q101 for automotive use?
Yes, the SMF8V5A-HE3_A08 is explicitly AEC-Q101 qualified, as confirmed in Vishay's official documentation (Rev. 2.4, 04-Jul-2023). It meets human body model (HBM) Class H3B (>8 kV) and supports full automotive temperature range (-65 °C to +175 °C). This qualification validates its suitability for under-hood and cabin applications such as infotainment displays, body control modules, and sensor interfaces where long-term reliability under thermal and mechanical stress is mandatory. The SMF8V5A-HE3_A08 also complies with IEC 61000-4-2 (±30 kV) and IEC 61000-4-5 (1000 W, 8/20 μs).
What package type does the SMF8V5A-HE3_A08 use, and is it compatible with standard SOD-123W footprints?
The SMF8V5A-HE3_A08 uses the DO-219AB package, which Vishay states is compatible with SOD-123W, SOD-123F, and SOD-123FL case outlines. Its dimensions are 3.9 mm × 1.9 mm × 1.08 mm, matching the SOD-123W land pattern. The device features a cathode bar marking and is wave and reflow solderable per J-STD-020 MSL level 1 guidelines. This compatibility allows drop-in replacement in existing SOD-123W layouts without PCB redesign, provided thermal and electrical validation confirms performance alignment. The SMF8V5A-HE3_A08 leverages this standardized footprint for seamless integration into high-volume manufacturing lines.
How does the 674 pF junction capacitance of the SMF8V5A-HE3_A08 affect high-speed signal integrity?
The SMF8V5A-HE3_A08's typical junction capacitance of 674 pF at 0 V is optimized for interfaces up to 480 Mbps (e.g., USB 2.0) and parallel digital buses, where moderate capacitance does not significantly degrade rise/fall times or cause excessive signal attenuation. While unsuitable for USB 3.0 or PCIe, this value provides effective ESD suppression without requiring complex impedance-matching networks. The SMF8V5A-HE3_A08 achieves this balance using low-noise silicon avalanche structure and tight process control - ensuring predictable capacitive loading across voltage and temperature. For HDMI 1.4 (up to 3.4 Gbps), layout best practices (short traces, ground stitching) maintain eye diagram compliance.
Can the SMF8V5A-HE3_A08 be used for bidirectional signal line protection?
No, the SMF8V5A-HE3_A08 is a unidirectional TVS diode and protects only against positive transients relative to ground. It conducts when the anode voltage exceeds cathode voltage by ≥9.44 V, but blocks reverse current beyond its 0.1 μA leakage at 8.5 V. For true bidirectional protection (e.g., RS-485, CAN, or AC-coupled lines), two SMF8V5A-HE3_A08 devices must be connected in series opposition, or a dedicated bidirectional variant like SMF8V5CA must be selected. Using a single SMF8V5A-HE3_A08 on a bidirectional line risks forward conduction during negative excursions, potentially disrupting signal operation or damaging the device.
SMF8V5A-HE3_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):
- 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-HE3_A08 FAQ
1.How can I place an order for SMF8V5A-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF8V5A-HE3_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 SMF8V5A-HE3_A08 reliable?
The price and inventory of SMF8V5A-HE3_A08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF8V5A-HE3_A08 is usually 5 days.
3.What payment methods are accepted for SMF8V5A-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF8V5A-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF8V5A-HE3_A08?
SMF8V5A-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF8V5A-HE3_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 SMF8V5A-HE3_A08?
For technical support, including SMF8V5A-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF8V5A-HE3_A08 requirements.
6.How does Aetrix verify that SMF8V5A-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF8V5A-HE3_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 SMF8V5A-HE3_A08 meets industry standards.
7.What is the process for return or replacement of SMF8V5A-HE3_A08?
All SMF8V5A-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF8V5A-HE3_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 SMF8V5A-HE3_A08 part is unused and in its original packaging.
Return procedure for SMF8V5A-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF8V5A-HE3_A08 Tags
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