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Vishay General Semiconductor - Diodes Division SMF8V5A-HE3-08
- Part No.:
- SMF8V5A-HE3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF8V5A-HE3-08.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,526
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Product details
Overview
SMF8V5A-HE3-08 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 8.5 V stand-off voltage, 14.4 V maximum clamping voltage at 13.9 A peak pulse current, ±30 kV IEC 61000-4-2 ESD immunity, and 200 W peak pulse power (10/1000 μs). It is used to safeguard USB 2.0, HDMI, and industrial sensor interfaces against electrostatic discharge.
For engineers reviewing the SMF8V5A-HE3-08 datasheet, SMF8V5A-HE3-08 pinout, SMF8V5A-HE3-08 application, or SMF8V5A-HE3-08 equivalent, key selection criteria include reverse stand-off voltage tolerance, clamping performance under 13.9 A surge, low 674 pF capacitance at 0 V, AEC-Q101 qualification status, and SOD-123W-compatible DO-219AB packaging for automated assembly.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche technology to clamp transients above its breakdown threshold (9.44–10.5 V) while maintaining low leakage (<0.1 μA at 8.5 V). Its fast response time-enabled by "Low Noise" process technology-ensures sub-nanosecond turn-on during ESD events.
The SMF8V5A-HE3-08 is optimized for board-level protection of I/O lines where signal integrity and minimal capacitive loading are critical. Its 674 pF typical junction capacitance at 0 V and 1.08 mm height support high-density routing in space-constrained applications such as portable instrumentation and automotive infotainment modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 8.5 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe operating margin below clamping threshold. |
| Breakdown Voltage (VBR) | 9.44–10.5 V at 1 mA - Confirmed avalanche initiation range; ensures reliable triggering without premature conduction. |
| Clamping Voltage (VC) | 14.4 V at 13.9 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| Junction Capacitance (CD) | 674 pF at 0 V, 1 MHz - Measured signal-line loading; compatible with USB 2.0 (≤1000 pF limit) and industrial RS-485 receivers. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Validated immunity level for end-equipment compliance testing. |
| Package | DO-219AB (SOD-123W-compatible) - Standardized low-profile outline enabling reflow/wave soldering and pick-and-place compatibility. |
| Operating Temp Range | −65 °C to +175 °C - Supports deployment in under-hood automotive, industrial control, and outdoor sensor environments. |
Pinout & Package
SMF8V5A-HE3-08 uses the DO-219AB (SMF) package: 3.9 mm × 1.9 mm × 1.08 mm body with cathode-bar marking. Terminals are anode and cathode; polarity is defined by molded cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference node | Connected to system ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode | Protected line input | Connected to I/O trace (e.g., USB D+); conducts surge current to ground when voltage exceeds VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Withstands repetitive surges up to 200 W without degradation-sufficient for IEC 61000-4-5 Level 3 (1 kV) system-level testing. |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for external ESD test fixtures during qualification; meets automotive and medical end-equipment requirements. |
| AEC-Q101 qualified option available | SMF8V5A-HE3-08 variant carries AEC-Q101 qualification-enabling use in automotive infotainment, ADAS camera links, and body electronics. |
| 674 pF capacitance at 0 V | Preserves signal rise/fall times in 480 Mbps USB 2.0 channels; avoids data eye closure or jitter accumulation. |
| Low-profile DO-219AB package | 1.08 mm max height enables placement beneath connectors or in tight PCB stack-ups common in handheld and IoT edge devices. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 host port against ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between each data line and ground, clamping transients before they reach the USB transceiver. Use Value: 674 pF capacitance avoids signal integrity loss at 480 Mbps; 14.4 V clamping prevents damage to PHY-level circuitry rated for ≤16 V absolute maximum. | Use Scenario: Safeguarding TMDS clock and data pairs in HDMI 1.4 source equipment exposed to user-accessible ports. IC Role / Device Role / Timing Role: Single-channel transient suppressor on each differential pair, referenced to chassis ground via low-inductance path. Use Value: 8.5 V VRWM aligns with HDMI common-mode voltage range (0–3.3 V), ensuring no DC loading; ±30 kV ESD rating satisfies IEC 61000-4-2 compliance for consumer electronics. |
| Automotive Camera Link Protection | Industrial RS-485 Transceiver Protection |
Use Scenario: Shielding FPD-Link III or GMSL serial video interface lines running from rear-view camera to infotainment module. IC Role / Device Role / Timing Role: Discrete ESD clamp on each high-speed serial lane, mounted adjacent to connector to minimize stub length. Use Value: −65 °C to +175 °C operation supports under-hood thermal cycling; AEC-Q101 qualification confirms reliability for automotive safety-critical vision systems. | Use Scenario: Protecting RS-485 receiver inputs in factory automation PLCs subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Standoff-rated TVS on A/B bus lines, grounded through short traces to reduce clamping impedance. Use Value: 200 W peak pulse power handles 10/1000 μs surges per IEC 61000-4-5; 14.4 V VC ensures protected transceiver remains within its 16 V abs-max rating. |
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 clamping voltage (15.0 V at 12.3 A); larger SMA (DO-214AC) package (4.5 mm × 2.7 mm). | Less suitable for high-speed data lines due to higher capacitance (~1000 pF); better for power rail or lower-frequency analog lines. | Select SMAJ8.5A-E3/5A only when board space allows larger footprint and signal bandwidth is <10 MHz. |
| TPD2E001DRYR | Integrated dual-channel ESD array (2 lines); 10 pF capacitance; 12 V VBR; not AEC-Q101 qualified. | Designed for ultra-high-speed digital interfaces (e.g., USB 3.0, MIPI); lacks automotive qualification and standalone surge rating. | Choose TPD2E001DRYR for compact dual-line protection in non-automotive consumer devices where capacitance <15 pF is mandatory. |
Compared with SMAJ8.5A-E3/5A and TPD2E001DRYR, SMF8V5A-HE3-08 delivers optimal balance of low capacitance (674 pF), automotive-grade ruggedness (AEC-Q101 option), and standardized DO-219AB packaging-making it preferred for USB 2.0, HDMI, and automotive serial link protection where signal fidelity and qualification are jointly required.
Availability
SMF8V5A-HE3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line safeguarding, and automotive camera link hardening requiring stable component supply across production lifecycles.
Supply support for SMF8V5A-HE3-08 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 components with emphasis on reliability and AEC-Q qualification.
The SMF series targets board-level ESD and surge protection for high-speed digital interfaces; it was engineered to replace legacy SOD-123 devices with improved power handling and tighter parametric control in automotive and industrial designs.
FAQ
What is the maximum clamping voltage of SMF8V5A-HE3-08 under standard test conditions?
The SMF8V5A-HE3-08 has a maximum clamping voltage (VC) of 14.4 V when subjected to a 13.9 A peak pulse current with a 10/1000 μs waveform. This value is measured at the device terminals and represents the highest voltage imposed on the protected circuit during surge events, ensuring downstream ICs remain within their absolute maximum ratings.
Is SMF8V5A-HE3-08 qualified to AEC-Q101 for automotive use?
Yes, the SMF8V5A-HE3-08 is offered in an AEC-Q101 qualified version. While the base part number does not encode qualification status, Vishay provides AEC-Q101-compliant variants of the SMF8V5A family-including SMF8V5A-HE3-08-with full test reports available upon request. This enables use in automotive infotainment, ADAS camera modules, and body control units.
What is the junction capacitance of SMF8V5A-HE3-08 and how does it affect high-speed signal lines?
The SMF8V5A-HE3-08 exhibits a typical junction capacitance of 674 pF at 0 V and 1 MHz. This value is low enough to avoid measurable signal distortion on USB 2.0 (480 Mbps) and HDMI 1.4 (up to 3.4 Gbps) differential pairs when properly laid out, preserving eye diagram integrity and minimizing bit error rates in real-world implementations.
Can SMF8V5A-HE3-08 be used in both wave and reflow soldering processes?
Yes, SMF8V5A-HE3-08 is fully compatible with both wave and reflow soldering. Its DO-219AB package meets J-STD-020 MSL Level 1 requirements, allowing unlimited floor life and peak reflow temperatures up to 260 °C-making it suitable for high-volume manufacturing with standard SMT assembly lines.
How does the 8.5 V stand-off voltage (VRWM) of SMF8V5A-HE3-08 relate to its breakdown and clamping behavior?
The 8.5 V stand-off voltage (VRWM) of SMF8V5A-HE3-08 defines the maximum continuous reverse voltage the device blocks without exceeding 0.1 μA leakage. Breakdown occurs between 9.44 V and 10.5 V, and clamping activates sharply thereafter-ensuring robust protection margin for 3.3 V or 5 V logic interfaces where normal operating voltages stay well below VRWM.
SMF8V5A-HE3-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF8V5A-HE3-08 FAQ
1.How can I place an order for SMF8V5A-HE3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF8V5A-HE3-08 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-HE3-08 reliable?
The price and inventory of SMF8V5A-HE3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF8V5A-HE3-08 is usually 5 days.
3.What payment methods are accepted for SMF8V5A-HE3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF8V5A-HE3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF8V5A-HE3-08?
SMF8V5A-HE3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF8V5A-HE3-08 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-HE3-08?
For technical support, including SMF8V5A-HE3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF8V5A-HE3-08 requirements.
6.How does Aetrix verify that SMF8V5A-HE3-08 is sourced from the original manufacturer or authorized distributors?
All SMF8V5A-HE3-08 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-HE3-08 meets industry standards.
7.What is the process for return or replacement of SMF8V5A-HE3-08?
All SMF8V5A-HE3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF8V5A-HE3-08, 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-HE3-08 part is unused and in its original packaging.
Return procedure for SMF8V5A-HE3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF8V5A-HE3-08 Tags
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