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Vishay General Semiconductor - Diodes Division SMF8V5A-E3-08
- Part No.:
- SMF8V5A-E3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF8V5A-E3-08.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:27,750
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Product details
Overview
SMF8V5A-E3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in DO-219AB (SOD-123W) 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-E3-08 datasheet, SMF8V5A-E3-08 pinout, SMF8V5A-E3-08 application, or SMF8V5A-E3-08 equivalent, this device is selected for robust ±30 kV IEC 61000-4-2 ESD protection, AEC-Q101 qualification, low clamping voltage under surge, and compatibility with automated SMT reflow (peak 260 °C) in space-constrained layouts.
Technical Context
This diode operates as a single-channel unidirectional TVS clamp, leveraging silicon avalanche structure to divert ESD transients before they reach sensitive downstream ICs. Its low incremental surge resistance ensures rapid voltage clamping during 10/1000 μs surges, while its 674 pF capacitance at 0 V maintains signal integrity on lines up to 480 Mbps.
The device meets AEC-Q101 stress requirements including H3B-class human body model (>8 kV), operates across –65 °C to +175 °C, and achieves thermal resistance of 180 K/W when mounted on 3 mm × 3 mm Cu pads - enabling reliable deployment in automotive infotainment and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage | 8.5 V - maximum reverse voltage before significant leakage; ensures no interference with 8 V nominal bus operation. |
| Breakdown Voltage (min) | 9.44 V - guaranteed avalanche initiation threshold; provides margin above stand-off for stable clamping onset. |
| Clamping Voltage (max) | 14.4 V at 13.9 A - limits transient voltage seen by protected IC; stays below absolute max ratings of common 16 V-tolerant receivers. |
| Junction Capacitance | 674 pF at 0 V, 1 MHz - enables use on USB 2.0 (480 Mbps) and RS-485 links without excessive signal distortion. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirement for industrial and automotive end-equipment. |
| Package | DO-219AB (SOD-123W) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline compatible with high-density PCB layouts and automated placement. |
| Thermal Resistance | 180 K/W (JA) - defines power dissipation limit under sustained surge; requires ≥3 mm × 3 mm Cu pad for rated performance. |
Pinout & Package
SMF8V5A-E3-08 uses the DO-219AB (SOD-123W) surface-mount package: cathode-marked anode-cathode configuration with 2 terminals in a low-profile, wave/reflow-solderable plastic case. Dimensions: 3.9 mm length × 1.9 mm width × 1.08 mm height; molded compound UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Input/line side connection | Connected to signal line requiring ESD protection; carries transient current into cathode during clamping event. |
| Cathode (bar-marked end) | Ground reference node | Must be tied to low-impedance system ground; establishes clamping reference and completes surge current path. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Sustains repeated ESD events without degradation; supports >100,000 surge cycles in typical industrial use cases. |
| "Low Noise" fast-response technology | Sub-nanosecond response time ensures clamping activation before transient edge reaches protected IC input stage. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment and body electronics where reliability under thermal cycling is critical. |
| Reflow solderable (260 °C peak) | Compatible with standard lead-free reflow profiles; eliminates need for special thermal management during assembly. |
| MSL Level 1 moisture sensitivity | No dry-pack or baking required prior to assembly; simplifies manufacturing logistics and reduces handling cost. |
Applications
| USB 2.0 Data Lines | HDMI DDC/CEC Channels |
|---|---|
Use Scenario: Protecting differential USB 2.0 D+/D− lines against ESD events during hot-plug insertion in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed directly at connector, shunting transients to ground before reaching USB transceiver PHY. Use Value: 674 pF capacitance avoids signal rise-time degradation at 480 Mbps; 14.4 V clamping prevents damage to 3.3 V tolerant PHY inputs. |
Use Scenario: Safeguarding HDMI DDC (I²C) and CEC control lines in AV receivers exposed to user-handling ESD. IC Role / Device Role / Timing Role: Standoff-rated protection device on 5 V-tolerant control buses, operating below 8.5 V normal mode voltage. Use Value: 8.5 V stand-off avoids false triggering during 5 V logic swings; ±30 kV ESD rating exceeds IEC 61000-4-2 Level 4 requirement. |
| Automotive Sensor Interfaces | Industrial RS-485 Transceivers |
Use Scenario: Shielding analog/digital sensor outputs (e.g., temperature, pressure) in engine control units from cable-borne transients. IC Role / Device Role / Timing Role: Point-of-entry transient suppressor on sensor harness interface, mounted adjacent to connector. Use Value: –65 °C to +175 °C operating range matches under-hood thermal demands; AEC-Q101 qualification confirms long-term reliability. |
Use Scenario: Protecting RS-485 transceiver I/O pins in factory automation PLCs subjected to frequent field wiring ESD. IC Role / Device Role / Timing Role: Low-clamp TVS on half-duplex bus lines, limiting voltage excursion during 13.9 A surge events. Use Value: 14.4 V clamping ensures transceiver remains within 16 V abs-max rating; DO-219AB footprint fits tight board spacing near connectors. |
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-E3/57T | Higher 15.0 V clamping voltage at same IPPM; SMA package (larger footprint: 4.5 mm × 2.7 mm). | Less suitable for high-speed lines due to higher capacitance (~900 pF); better for lower-frequency power rails. | Select SMF8V5A-E3-08 over SMAJ8.5A-E3/57T when board space and signal integrity on data lines are prioritized. |
| TPD2E001DRYR | 2-channel bidirectional array; 12 pF capacitance; lower 12 V ESD rating (±12 kV contact). | Designed for ultra-high-speed interfaces (USB 3.0, HDMI 2.0); insufficient for automotive-grade ±30 kV requirements. | Choose SMF8V5A-E3-08 instead of TPD2E001DRYR when full IEC 61000-4-2 Level 4 ESD immunity and AEC-Q101 compliance are mandatory. |
Compared with SMAJ8.5A-E3/57T and TPD2E001DRYR, SMF8V5A-E3-08 uniquely balances ±30 kV ESD immunity, 674 pF capacitance, AEC-Q101 qualification, and DO-219AB compactness - making it optimal for space-limited, high-reliability data-line protection where both speed and ruggedness are required.
Availability
SMF8V5A-E3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive sensor signal conditioning, and industrial RS-485 transceiver safeguarding requiring stable component supply and long-term lifecycle support.
Supply support for SMF8V5A-E3-08 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with emphasis on reliability, precision, and application-specific performance.
The SMF series belongs to Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for high-efficiency ESD and surge protection in automotive, industrial, and consumer electronics where compact size and certified robustness are essential.
FAQ
What is the maximum clamping voltage of SMF8V5A-E3-08 at its rated peak pulse current?
The SMF8V5A-E3-08 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 under standardized surge conditions and guarantees that protected circuitry downstream will not experience voltages exceeding 14.4 V during transient events - critical for ensuring compatibility with 16 V absolute maximum rated ICs. The clamping performance is validated per IEC 61000-4-5 test methodology.
Is SMF8V5A-E3-08 suitable for automotive applications?
Yes, SMF8V5A-E3-08 is AEC-Q101 qualified and rated for operation from –65 °C to +175 °C, making it suitable for under-hood and cabin automotive applications such as infotainment interfaces, sensor signal conditioning, and body control modules. Its ±30 kV IEC 61000-4-2 ESD rating and low clamping voltage meet stringent OEM immunity requirements. The DO-219AB package also supports automated high-volume automotive PCB assembly.
What is the junction capacitance of SMF8V5A-E3-08 and how does it affect high-speed signal lines?
The SMF8V5A-E3-08 exhibits 674 pF typical junction capacitance at 0 V and 1 MHz. This value is low enough to avoid significant signal attenuation or timing skew on USB 2.0 (480 Mbps) and RS-485 links, while still delivering robust ESD suppression. For comparison, higher-capacitance TVS devices (>1 nF) would degrade eye diagrams on these interfaces - confirming SMF8V5A-E3-08's suitability for data-line protection where bandwidth preservation is essential.
Does SMF8V5A-E3-08 require special handling or baking before reflow soldering?
No, SMF8V5A-E3-08 is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and does not require dry-packing, vacuum sealing, or baking prior to reflow. It is fully compatible with standard lead-free reflow profiles, including peak temperatures up to 260 °C. This simplifies manufacturing logistics and eliminates moisture-related defects like popcorning during assembly - a key advantage over higher-MSL alternatives.
How does the stand-off voltage of SMF8V5A-E3-08 compare to its breakdown voltage, and why does that matter?
The SMF8V5A-E3-08 has a maximum stand-off voltage (VRWM) of 8.5 V and a minimum breakdown voltage (VBR) of 9.44 V - providing a 0.94 V design margin. This gap ensures the diode remains non-conductive during normal 8 V nominal operation (e.g., 5 V or 3.3 V logic with tolerances), preventing leakage or loading, while reliably triggering only during overvoltage transients. That margin is essential for stable, noise-free operation in always-on interfaces like HDMI CEC or sensor analog outputs.
SMF8V5A-E3-08 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:
- General Purpose
- Capacitance @ Frequency:
- 674pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF8V5A-E3-08 FAQ
1.How can I place an order for SMF8V5A-E3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF8V5A-E3-08 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-E3-08 reliable?
The price and inventory of SMF8V5A-E3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF8V5A-E3-08 is usually 5 days.
3.What payment methods are accepted for SMF8V5A-E3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF8V5A-E3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF8V5A-E3-08?
SMF8V5A-E3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF8V5A-E3-08 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-E3-08?
For technical support, including SMF8V5A-E3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF8V5A-E3-08 requirements.
6.How does Aetrix verify that SMF8V5A-E3-08 is sourced from the original manufacturer or authorized distributors?
All SMF8V5A-E3-08 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-E3-08 meets industry standards.
7.What is the process for return or replacement of SMF8V5A-E3-08?
All SMF8V5A-E3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF8V5A-E3-08, 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-E3-08 part is unused and in its original packaging.
Return procedure for SMF8V5A-E3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF8V5A-E3-08 Tags
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