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Vishay General Semiconductor - Diodes Division SMF17A-HM3-18
- Part No.:
- SMF17A-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF17A-HM3-18.pdf
- Description:
- TVS DIODE 17VWM 27.6VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:8,291
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Product details
Overview
SMF17A-HM3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient 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, 324 pF typical capacitance at 0 V, ±30 kV IEC 61000-4-2 ESD immunity, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMF17A-HM3-18 datasheet, SMF17A-HM3-18 pinout, SMF17A-HM3-18 application, or SMF17A-HM3-18 equivalent, this device is selected for robust electrostatic discharge protection in USB 2.0, HDMI, automotive infotainment interfaces, and industrial sensor signal conditioning where low clamping voltage and stable capacitance are critical.
Technical Context
This unidirectional TVS diode operates as a reverse-biased clamp, activating above its 17 V stand-off voltage to shunt transients while maintaining signal integrity below that threshold. Its 324 pF capacitance at 0 V and low incremental surge resistance ensure minimal distortion on high-frequency lines up to ~100 MHz.
The device uses "Low Noise" silicon technology with sub-nanosecond response time and is qualified per AEC-Q101 for automotive under-hood and infotainment applications. It meets IEC 61000-4-2 (±30 kV contact/air) and IEC 61000-4-5 (1000 W, 8/20 μs) surge standards, with thermal resistance of 180 K/W on standard epoxy-glass PCB pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 17 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin for 15 V nominal bus lines. |
| Clamping Voltage (VC) | 27.6 V max at 7.2 A (10/1000 μs) - Limits transient voltage seen by downstream ICs during ESD or surge events. |
| Peak Pulse Power | 200 W (10/1000 μs), 1000 W (8/20 μs) - Sustains short-duration surges without degradation in automotive and industrial environments. |
| Capacitance (CD) | 324 pF at 0 V, 1 MHz - Low enough for USB 2.0 (480 Mbps) and CAN FD signal integrity; drops significantly above VRWM. |
| ESD Rating | ±30 kV contact & air (IEC 61000-4-2) - Exceeds Level 4 immunity requirements for consumer and automotive electronics. |
| AEC-Q101 Qualified | Yes - Validated for automotive temperature range (−65 °C to +175 °C) and reliability testing including HBM >8 kV. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline enabling dense PCB layouts and automated assembly. |
Pinout & Package
SMF17A-HM3-18 is housed in the DO-219AB (SMF) package: a two-terminal, surface-mount, cathode-marked case with molded plastic body and gull-wing leads. Dimensions: 3.9 mm length × 1.9 mm width × 1.08 mm height. Compatible with wave and reflow soldering (peak temp ≤260 °C); MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to protected signal line; conducts forward during positive transients when used in bidirectional configurations (requires external series resistor). |
| Cathode | Ground reference terminal | Connected to system ground or low-impedance return path; defines unidirectional clamping direction and enables fast turn-on during negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping voltage | 27.6 V max at 7.2 A ensures downstream 3.3 V or 5 V logic remains within absolute maximum ratings during ESD events. |
| Fast response time | Sub-nanosecond turn-on via "Low Noise" silicon process protects sensitive analog and high-speed digital inputs before damage occurs. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock-suitable for infotainment and ADAS interfaces. |
| Low-profile DO-219AB package | 1.08 mm height enables use in space-constrained modules such as telematics units and compact sensor nodes without compromising thermal performance. |
| High ESD immunity | ±30 kV contact/air per IEC 61000-4-2 exceeds industrial and automotive ESD test requirements, reducing need for secondary protection layers. |
Applications
| USB 2.0 Data Lines | HDMI Interface Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines in portable USB peripherals against ESD from human contact or cable coupling. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between connector and USB transceiver IC. Use Value: 324 pF capacitance avoids signal rise-time degradation at 480 Mbps; 27.6 V clamping prevents latch-up in USB PHYs rated for 3.6 V absolute max. |
Use Scenario: Safeguarding TMDS clock and data channels in automotive head units against hot-plug and ESD events. IC Role / Device Role / Timing Role: Line-side ESD clamp on each differential pair, referenced to chassis ground. Use Value: AEC-Q101 qualification ensures operation across −40 °C to +105 °C ambient; low clamping preserves eye diagram integrity at 2.25 Gbps. |
| Automotive Infotainment | Industrial Sensor Signal Conditioning |
Use Scenario: Shielding audio/video input/output ports (e.g., AUX, AV-IN) in vehicle entertainment systems from ESD and load dump coupling. IC Role / Device Role / Timing Role: Primary ESD protection element at connector interface, upstream of EMI filters and level shifters. Use Value: ±30 kV ESD rating eliminates field failures during service; DO-219AB footprint allows placement directly at board edge without trace stubs. |
Use Scenario: Protecting 4–20 mA current loop or RS-485 transceiver inputs in factory automation sensors exposed to maintenance-handling ESD. IC Role / Device Role / Timing Role: Standoff-clamp TVS on signal line, paired with series impedance to limit peak current into IC pins. Use Value: 17 V VRWM matches common 24 V industrial supply rails; 200 W pulse power withstands repetitive surge events in noisy plant environments. |
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 | DO-214AC (SMA) package; 1.9 mm height vs. SMF's 1.08 mm; 350 pF capacitance; same 17 V VRWM and 27.6 V VC. | Larger footprint and higher profile limits use in ultra-thin modules; better thermal dissipation for higher average power. | Select SMAJ17A-E3/57T when board space permits and higher MSL tolerance (MSL 1 vs. SMF's MSL 1) or legacy layout compatibility is required. |
| TPD2E001DRYR | 2-channel, 0.85 pF dual ESD array in USON-6; no discrete anode/cathode; 5 V VRWM; not AEC-Q101 qualified. | Designed for ultra-high-speed interfaces (USB 3.0, PCIe); unsuitable for 17 V rail protection or automotive qualification needs. | Choose TPD2E001DRYR only for low-capacitance (<1 pF), multi-line protection below 5.5 V; not a functional substitute for SMF17A-HM3-18 in 17 V applications. |
Compared with SMAJ17A-E3/57T and TPD2E001DRYR, SMF17A-HM3-18 uniquely balances low profile (1.08 mm), AEC-Q101 compliance, and 17 V standoff in a single-device solution-making it optimal for space-constrained automotive and industrial signal line protection where both voltage rating and qualification matter.
Availability
SMF17A-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment interfaces, industrial sensor signal conditioning, and high-speed data line protection requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant ESD hardening.
Supply support for SMF17A-HM3-18 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets high-speed interface protection with optimized capacitance-clamping trade-offs; it was engineered specifically for AEC-Q101-compliant ESD suppression in next-generation automotive electronics and ruggedized industrial communications.
FAQ
What is the maximum clamping voltage of SMF17A-HM3-18 under standard test conditions?
The SMF17A-HM3-18 has a maximum clamping voltage (VC) of 27.6 V when subjected to a 10/1000 μs waveform at 7.2 A peak pulse current. This value is measured per IEC 61000-4-5 and ensures downstream ICs remain within safe operating limits during transient events. The clamping behavior is consistent across its full operating temperature range of −65 °C to +175 °C.
Is SMF17A-HM3-18 suitable for protecting USB 2.0 data lines?
Yes, SMF17A-HM3-18 is suitable for USB 2.0 data line protection due to its 324 pF capacitance at 0 V and 27.6 V clamping voltage. While higher than ultra-low-capacitance arrays, this value maintains signal integrity at 480 Mbps when placed with minimized trace length and proper grounding. Its unidirectional configuration requires correct polarity orientation relative to the protected line and ground.
Does SMF17A-HM3-18 meet automotive qualification standards?
Yes, SMF17A-HM3-18 is AEC-Q101 qualified, having passed stress tests including high-temperature operating life, temperature cycling, and human-body-model ESD (>8 kV). It supports the full automotive temperature range (−65 °C to +175 °C junction) and is rated for use in infotainment, body control, and ADAS subsystems where reliability under harsh environmental conditions is mandatory.
What is the package type and mounting compatibility of SMF17A-HM3-18?
SMF17A-HM3-18 uses the DO-219AB (SMF) package: a 3.9 mm × 1.9 mm × 1.08 mm surface-mount outline compatible with SOD-123W footprints. It supports both wave and reflow soldering per J-STD-020 (peak temperature ≤260 °C), with MSL level 1 rating and no dry-pack requirement. The cathode is marked by a bar on the device top surface.
How does the 17 V stand-off voltage of SMF17A-HM3-18 relate to system voltage selection?
The 17 V stand-off voltage (VRWM) of SMF17A-HM3-18 is selected to protect circuits operating near 15 V nominal rails-such as automotive 12 V systems with ripple or industrial 24 V lines with local regulation. It provides ≥2 V margin above steady-state voltage while ensuring reliable clamping onset before damage occurs. This makes SMF17A-HM3-18 appropriate for CAN FD, LIN, and analog sensor interfaces tied to 12–18 V domains.
SMF17A-HM3-18 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):
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF17A-HM3-18 FAQ
1.How can I place an order for SMF17A-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF17A-HM3-18 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-HM3-18 reliable?
The price and inventory of SMF17A-HM3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF17A-HM3-18 is usually 5 days.
3.What payment methods are accepted for SMF17A-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF17A-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF17A-HM3-18?
SMF17A-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF17A-HM3-18 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-HM3-18?
For technical support, including SMF17A-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF17A-HM3-18 requirements.
6.How does Aetrix verify that SMF17A-HM3-18 is sourced from the original manufacturer or authorized distributors?
All SMF17A-HM3-18 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-HM3-18 meets industry standards.
7.What is the process for return or replacement of SMF17A-HM3-18?
All SMF17A-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF17A-HM3-18, 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-HM3-18 part is unused and in its original packaging.
Return procedure for SMF17A-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF17A-HM3-18 Tags
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