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Vishay SMF8V5A-HE3_A18
- Part No.:
- SMF8V5A-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF8V5A-HE3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,432
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Product details
Overview
SMF8V5A-HE3_A18 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_A18 datasheet, SMF8V5A-HE3_A18 pinout, SMF8V5A-HE3_A18 application, or SMF8V5A-HE3_A18 equivalent, key selection criteria include clamping voltage margin relative to IC I/O rails, capacitance impact on signal integrity, AEC-Q101 qualification status, and SOD-123W-compatible footprint compatibility with automated assembly processes.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche breakdown to clamp transients above its reverse stand-off voltage (VRWM = 8.5 V) while maintaining low leakage (<0.1 μA) below that threshold. Its low incremental surge resistance ensures rapid response and minimal voltage overshoot during fast ESD events.
The SMF8V5A-HE3_A18 is optimized for board-level ESD protection in space-constrained applications, with a 1.08 mm height and 3.9 mm × 1.9 mm footprint matching SOD-123W outlines. It supports wave and reflow soldering per J-STD-020 MSL level 1, with peak temperature tolerance up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 8.5 V - Maximum continuous reverse voltage before clamping begins; sets safe operating margin below 9 V I/O rails. |
| Clamping Voltage (VC) | 14.4 V max at IPPM = 13.9 A - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge. |
| Peak Pulse Power | 200 W (10/1000 μs) - Sustains industry-standard lightning/surge stress without failure. |
| Capacitance (CD) | 674 pF at VR = 0 V, f = 1 MHz - Low enough for USB 2.0 (480 Mbps) signal integrity with minimal jitter. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Meets highest system-level ESD robustness requirements. |
| Operating Temp Range | –65 °C to +175 °C - Supports extended industrial and under-hood automotive environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test standard including HBM >8 kV. |
Pinout & Package
The SMF8V5A-HE3_A18 uses the DO-219AB (SMF) package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, molded epoxy case with cathode band marking. Compatible with SOD-123W, SOD-123F, and SOD-123FL footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to signal line requiring protection; conducts during positive transients when referenced to ground. |
| Cathode | Ground reference | Connected to system ground plane; defines unidirectional clamping direction and establishes VRWM threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Noise Fast Response | Sub-nanosecond turn-on enables effective suppression of IEC 61000-4-2 ESD pulses (rise time <1 ns). |
| AEC-Q101 Qualification | Validated for automotive use including temperature cycling, mechanical shock, and HBM ESD stress. |
| Solder Compatibility | Rated for both wave and reflow soldering per J-STD-020, supporting high-yield SMT manufacturing. |
| UL 94 V-0 Molding | Flame-retardant encapsulation meets safety standards for enclosed industrial and automotive enclosures. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable USB host/device ports from user-handling ESD events. 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 degradation at 480 Mbps; 14.4 V clamping stays safely below 3.3 V IO absolute max ratings with margin. | Use Scenario: Safeguarding TMDS clock and data channels on HDMI source/sink PCBs exposed to plug/unplug ESD. IC Role / Device Role / Timing Role: Single-channel transient suppressor on each TMDS line, referenced to chassis ground to limit voltage excursion. Use Value: Low profile (1.08 mm height) fits tight HDMI connector keep-out zones; ±30 kV ESD rating exceeds IEC 61000-4-2 system-level test requirements. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module I/O |
Use Scenario: Protecting analog outputs (e.g., 0–10 V, 4–20 mA) and digital status lines of factory-floor pressure/temperature sensors. IC Role / Device Role / Timing Role: Standoff-clamp TVS on sensor output traces, absorbing cable discharge events induced by nearby motor switching or static buildup. Use Value: –65 °C to +175 °C operating range ensures reliability in uncontrolled ambient conditions; 200 W pulse rating handles long-duration surges from inductive load switching. | Use Scenario: Guarding LIN bus pins and discrete switch inputs in BCMs subjected to harsh vehicle ESD environments. IC Role / Device Role / Timing Role: Unidirectional ESD suppressor on each LIN input, grounded to vehicle chassis to shunt transients away from MCU GPIO. Use Value: AEC-Q101 qualification confirms suitability for automotive grade-2 (–40 °C to +105 °C ambient) operation; SOD-123W footprint allows drop-in replacement in legacy designs. |
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 (13.6 V min), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 600 W peak power. | Better suited for higher-energy surges but adds 0.6 mm height and 0.8 mm length; less ideal for ultra-thin USB/HDMI modules. | Choose SMAJ8.5A when surge energy exceeds 200 W or board space permits larger footprint. |
| TPD2E007DRYR | 2-channel, 7 pF per channel, 5.5 V VRWM, not AEC-Q101 qualified; uses DRY (SOT-553) 1.6 mm × 1.6 mm package. | Optimized for high-speed digital interfaces (USB 3.0, MIPI) where sub-10 pF capacitance is mandatory; lacks automotive qualification. | Choose TPD2E007DRYR only for low-capacitance, non-automotive high-speed serial links. |
Compared with SMAJ8.5A and TPD2E007DRYR, the SMF8V5A-HE3_A18 uniquely balances automotive qualification, compact DO-219AB size, and 674 pF capacitance-making it optimal for cost-sensitive, space-constrained USB 2.0 and industrial analog I/O protection where ±30 kV ESD robustness is required.
Availability
SMF8V5A-HE3_A18 is available at Aetrix Electronics and suitable for USB interface protection, HDMI signal line safeguarding, and industrial sensor conditioning requiring stable component supply across production lifecycles.
Supply support for SMF8V5A-HE3_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 power management, sensing, and protection components with emphasis on reliability and automotive-grade validation.
The SMF series targets board-level ESD and surge protection in consumer, industrial, and automotive systems, delivering standardized TVS performance in compact, manufacturable packages aligned with SOD-123W layout conventions.
FAQ
What is the clamping voltage specification for SMF8V5A-HE3_A18?
The SMF8V5A-HE3_A18 has a maximum reverse clamping voltage (VC) of 14.4 V at a peak pulse current (IPPM) of 13.9 A using a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMF8V5A-HE3_A18 maintains this clamping performance across its full operating temperature range.
Is SMF8V5A-HE3_A18 qualified for automotive applications?
Yes, SMF8V5A-HE3_A18 is AEC-Q101 qualified, having passed stress tests including human body model ESD (>8 kV), temperature cycling, and mechanical shock. It supports automotive-grade operating temperatures from –65 °C to +175 °C junction, making it suitable for body control modules, infotainment interfaces, and sensor nodes. The SMF8V5A-HE3_A18 carries the "HE3" suffix denoting AEC-Q101 compliance per Vishay's ordering nomenclature.
What package type does SMF8V5A-HE3_A18 use, and is it compatible with SOD-123W layouts?
SMF8V5A-HE3_A18 uses the DO-219AB (SMF) package: 3.9 mm × 1.9 mm × 1.08 mm with cathode band marking. Per Vishay documentation, it is explicitly compatible with SOD-123W, SOD-123F, and SOD-123FL case outlines. Its footprint matches standard SOD-123W land patterns, enabling direct placement in existing designs without PCB revision.
How does the capacitance of SMF8V5A-HE3_A18 affect high-speed signal integrity?
The SMF8V5A-HE3_A18 exhibits 674 pF typical capacitance at 0 V bias and 1 MHz, which is appropriate for USB 2.0 (480 Mbps) and industrial analog signals but not for USB 3.x or HDMI 2.0+. This capacitance introduces minimal insertion loss and jitter in sub-100 MHz applications. For SMF8V5A-HE3_A18, the trade-off favors robust ESD clamping over ultra-low capacitance-ideal where surge energy handling outweighs GHz-bandwidth needs.
What is the peak pulse power rating of SMF8V5A-HE3_A18, and under what waveform is it specified?
The SMF8V5A-HE3_A18 is rated for 200 W peak pulse power under the 10/1000 μs double-exponential waveform per IEC 61000-4-5 Annex A. It also supports 1000 W under the shorter 8/20 μs waveform. These ratings reflect non-repetitive surge capability; derating applies for repetitive pulses. The SMF8V5A-HE3_A18 delivers this power handling within its 1.08 mm height constraint, distinguishing it from larger-package alternatives.
SMF8V5A-HE3_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-HE3_A18 FAQ
1.How can I place an order for SMF8V5A-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF8V5A-HE3_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-HE3_A18 reliable?
The price and inventory of SMF8V5A-HE3_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-HE3_A18 is usually 5 days.
3.What payment methods are accepted for SMF8V5A-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF8V5A-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF8V5A-HE3_A18?
SMF8V5A-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF8V5A-HE3_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-HE3_A18?
For technical support, including SMF8V5A-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF8V5A-HE3_A18 requirements.
6.How does Aetrix verify that SMF8V5A-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF8V5A-HE3_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-HE3_A18 meets industry standards.
7.What is the process for return or replacement of SMF8V5A-HE3_A18?
All SMF8V5A-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF8V5A-HE3_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-HE3_A18 part is unused and in its original packaging.
Return procedure for SMF8V5A-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF8V5A-HE3_A18 Tags
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