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Vishay SMF17A-HE3_A18
- Part No.:
- SMF17A-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF17A-HE3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,972
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Product details
Overview
SMF17A-HE3_A18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for transient voltage suppression in high-speed data lines. It features a 17 V stand-off voltage (VRWM), 27.6 V maximum clamping voltage at 7.2 A peak pulse current, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in USB 2.0 interfaces, HDMI signal paths, and industrial sensor I/O protection.
For engineers reviewing the SMF17A-HE3_A18 datasheet, SMF17A-HE3_A18 pinout, SMF17A-HE3_A18 application, or SMF17A-HE3_A18 equivalent, this page delivers verified electrical specs, SOD-123W-compatible packaging details, AEC-Q101 qualification status, clamping performance under 10/1000 µs surges, and real-world use cases in automotive infotainment and industrial HMI front panels.
Technical Context
This device operates as a single-channel unidirectional TVS diode with a silicon avalanche structure optimized for fast response (<1 ns) and low dynamic impedance. Its 1.08 mm height and 3.9 mm × 1.9 mm footprint enable dense PCB layouts while maintaining 200 W peak pulse power (10/1000 µs) and 1000 W (8/20 µs) per IEC 61000-4-5.
The SMF17A-HE3_A18 exhibits 324 pF typical junction capacitance at 0 V, enabling use in sub-100 MHz signal lines without significant signal integrity degradation. Its thermal resistance (RthJA = 180 K/W on 3 mm × 3 mm Cu pads) supports reliable operation up to +175 °C junction temperature in thermally constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 17 V - defines maximum continuous reverse operating voltage before leakage exceeds 0.1 µA; sets upper limit for protected line voltage. |
| Clamping Voltage (VC) | 27.6 V max at IPPM = 7.2 A (10/1000 µs) - ensures downstream ICs see no more than 27.6 V during surge events. |
| Peak Pulse Power | 200 W (10/1000 µs), 1000 W (8/20 µs) - determines survivability against lightning-induced surges and EFT bursts. |
| Junction Capacitance | 324 pF at VR = 0 V, f = 1 MHz - impacts high-frequency signal attenuation; suitable for USB 2.0 (480 Mbps) but not USB 3.x. |
| ESD Rating | ±30 kV contact & air discharge (IEC 61000-4-2) - exceeds Level 4 immunity requirements for consumer and automotive electronics. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| Package | DO-219AB (SOD-123W compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline enabling automated placement and reflow soldering. |
Pinout & Package
SMF17A-HE3_A18 uses the DO-219AB (SOD-123W-equivalent) surface-mount package with cathode-bar marking. The device has two terminals: anode and cathode. Mounting orientation follows standard SOD-123 tape direction with cathode indicated by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to the signal or power line requiring ESD protection; referenced to system ground via cathode path during clamping. |
| Cathode | Ground-reference terminal | Connected to system ground or low-impedance return path; conducts surge current to ground when reverse voltage exceeds VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile DO-219AB package | 1.08 mm height enables use in ultra-thin consumer devices and stacked PCB assemblies where Z-axis space is constrained. |
| "Low Noise" fast-response technology | Sub-1 ns response time minimizes voltage overshoot during ESD transients, reducing risk of latch-up in sensitive CMOS receivers. |
| Wave and reflow solderable | Qualified for peak reflow temperatures up to 260 °C (J-STD-020 MSL level 1), supporting standard lead-free assembly processes. |
| High surge current capability | 7.2 A peak pulse current (10/1000 µs) provides robust protection against multiple ESD strikes without parameter drift. |
| AEC-Q101 qualification | Validated for automotive applications including infotainment displays, body control modules, and ADAS sensor interfaces. |
Applications
| USB 2.0 Data Lines | HDMI Signal Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable media players and docking stations from user-hand ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between each data line and chassis ground to clamp transients before reaching USB transceiver. Use Value: Maintains signal integrity with 324 pF capacitance while delivering ±30 kV ESD immunity - meeting USB-IF compliance requirements. |
Use Scenario: Shielding TMDS clock and data channels in automotive head units against ESD during cable insertion/removal. IC Role / Device Role / Timing Role: Standoff-clamp TVS on each TMDS pair to suppress fast-rising transients without distorting 165 MHz pixel clock timing. Use Value: 27.6 V clamping ensures HDMI receiver inputs remain below absolute maximum ratings during 8 kV HBM ESD events. |
| Industrial Sensor I/O | Automotive Infotainment Display |
Use Scenario: Safeguarding analog outputs (0–10 V, 4–20 mA) and digital GPIOs on PLC I/O modules exposed to factory floor ESD. IC Role / Device Role / Timing Role: Single-channel transient suppressor on each I/O line, referenced to local ground plane to prevent ground bounce coupling. Use Value: 175 °C max junction temperature rating allows operation in uncooled enclosures near motors or power supplies. |
Use Scenario: Protecting touch controller interface lines (I²C, GPIO) in center-stack displays subjected to repeated finger contact ESD. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on touch interrupt and reset lines to avoid false triggering during ±30 kV air discharge. Use Value: AEC-Q101 qualification confirms reliability across -65 °C to +175 °C ambient, matching automotive cabin temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/57T | Higher clamping voltage (33.2 V), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 600 W peak power (10/1000 µs). | Less suitable for space-constrained layouts; better for higher-energy surges in power supply rails. | Select SMAJ17A-E3/57T only if board area permits larger footprint and clamping margin >5.6 V above SMF17A-HE3_A18 is acceptable. |
| TPD2E001DRYR | Bi-directional dual-channel array (0.5 pF/channel), 5 V VRWM, integrated 10 Ω series resistors, QFN-6 package. | Designed for high-speed digital buses (I²C, USB); incompatible with 17 V signal lines due to lower standoff voltage. | Choose TPD2E001DRYR for low-capacitance protection of 3.3 V logic interfaces - not a direct replacement for SMF17A-HE3_A18's 17 V rail protection. |
Compared with SMAJ17A-E3/57T and TPD2E001DRYR, SMF17A-HE3_A18 uniquely balances 17 V standoff, 27.6 V clamping, 324 pF capacitance, and DO-219AB compactness - making it optimal for 12–24 V industrial and automotive data line protection where space and precise voltage thresholds are critical.
Availability
SMF17A-HE3_A18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal path safeguarding, and industrial sensor I/O conditioning requiring stable component supply across long-life production cycles.
Supply support for SMF17A-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 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 targets high-reliability ESD protection for automotive, industrial, and consumer electronics - engineered for low clamping, fast response, and AEC-Q101 compliance in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of the SMF17A-HE3_A18 under a 10/1000 µs surge?
The SMF17A-HE3_A18 has a maximum clamping voltage (VC) of 27.6 V when subjected to a 7.2 A peak pulse current with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures protected circuits remain within safe voltage limits during transient events. The SMF17A-HE3_A18 maintains this clamping performance across its full operating temperature range.
Is the SMF17A-HE3_A18 qualified to AEC-Q101 standards?
Yes, the SMF17A-HE3_A18 is AEC-Q101 qualified, confirming its suitability for automotive applications including infotainment systems, body electronics, and ADAS sensor interfaces. This qualification covers stress tests such as temperature cycling, high-temperature operating life, and ESD robustness. The SMF17A-HE3_A18 meets all required failure criteria under AEC-Q101 Rev D.
What is the junction capacitance of the SMF17A-HE3_A18 at zero bias?
The SMF17A-HE3_A18 exhibits a typical junction capacitance (CD) of 324 pF at VR = 0 V and f = 1 MHz. This value is confirmed in Vishay's official datasheet (Document Number: 85881, Rev. 2.4) and is critical for evaluating signal integrity impact on data lines. The SMF17A-HE3_A18's capacitance decreases significantly above 1 V reverse bias, supporting effective high-speed protection.
Can the SMF17A-HE3_A18 be used in place of the SMF15A or SMF18A?
The SMF17A-HE3_A18 is not a drop-in replacement for SMF15A (15 V VRWM) or SMF18A (18 V VRWM) due to differences in stand-off voltage and clamping behavior. While all three share the same DO-219AB package and pinout, selecting SMF17A-HE3_A18 requires matching the protected line's nominal voltage to its 17 V VRWM. The SMF17A-HE3_A18 must be evaluated independently for each circuit's voltage margin and surge profile.
What is the maximum operating temperature range for the SMF17A-HE3_A18?
The SMF17A-HE3_A18 operates across a temperature range of -65 °C to +175 °C, covering extreme automotive and industrial environments. Its junction temperature rating of 175 °C and storage temperature specification align with AEC-Q101 requirements. This wide range ensures consistent clamping performance and leakage current stability in SMF17A-HE3_A18 deployments from cold-start engine bays to hot industrial enclosures.
SMF17A-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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 7.2A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 324pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF17A-HE3_A18 FAQ
1.How can I place an order for SMF17A-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF17A-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 SMF17A-HE3_A18 reliable?
The price and inventory of SMF17A-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 SMF17A-HE3_A18 is usually 5 days.
3.What payment methods are accepted for SMF17A-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF17A-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF17A-HE3_A18?
SMF17A-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF17A-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 SMF17A-HE3_A18?
For technical support, including SMF17A-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF17A-HE3_A18 requirements.
6.How does Aetrix verify that SMF17A-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF17A-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 SMF17A-HE3_A18 meets industry standards.
7.What is the process for return or replacement of SMF17A-HE3_A18?
All SMF17A-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF17A-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 SMF17A-HE3_A18 part is unused and in its original packaging.
Return procedure for SMF17A-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF17A-HE3_A18 Tags
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