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Vishay General Semiconductor - Diodes Division SMF17A-HM3-08
- Part No.:
- SMF17A-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF17A-HM3-08.pdf
- Description:
- TVS DIODE 17VWM 27.6VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:2,144
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Product details
Overview
SMF17A-HM3-08 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 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 applications.
For engineers reviewing the SMF17A-HM3-08 datasheet, SMF17A-HM3-08 pinout, SMF17A-HM3-08 application, or SMF17A-HM3-08 equivalent, this device is selected for USB 2.0, HDMI, Ethernet PHY interfaces, and automotive infotainment data lines where low clamping voltage, fast response, and robust ESD survivability are critical design requirements.
Technical Context
This diode operates as a unidirectional TVS (Transient Voltage Suppressor) with avalanche breakdown behavior, optimized for electrostatic discharge protection in signal paths. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients, while its "Low Noise" technology delivers sub-nanosecond response time to clamp ESD events before downstream ICs are damaged.
The SMF17A-HM3-08 is rated for 200 W peak pulse power (10/1000 μs waveform), supports 50 A non-repetitive forward surge current, and maintains stable performance across -65 °C to +175 °C operating temperature range - enabling use in under-hood automotive environments and industrial edge nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 17 V - Maximum continuous reverse voltage before conduction; defines safe operating margin for 15 V nominal data lines. |
| Clamping Voltage (VC) | 27.6 V max at IPPM = 7.2 A - Limits transient voltage seen by protected ICs during 10/1000 μs surge. |
| Peak Pulse Power | 200 W (10/1000 μs) - Sustains single high-energy ESD strikes without degradation. |
| Capacitance (CD) | 324 pF at VR = 0 V, f = 1 MHz - Low enough for USB 2.0 (480 Mbps) and CAN FD signal integrity. |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Exceeds Level 4 immunity standard for end-equipment certification. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including HBM >8 kV and high-temp operation up to 175 °C junction. |
| Package | DO-219AB (SOD-123W compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile footprint for space-constrained PCB layouts. |
Pinout & Package
SMF17A-HM3-08 uses the DO-219AB (SOD-123W-compatible) surface-mount package with two terminals: anode and cathode. The cathode is marked by a bar on the device body. Mounting requires reflow-compatible solder profile (peak ≤260 °C) and conforms to MSL level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Signal Line Connection | Connected to protected line (e.g., USB D+); conducts during positive transients when cathode is biased higher. |
| Cathode | Ground Reference Terminal | Connected to system ground or low-impedance return path; enables clamping action by shunting surge current to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional ESD Protection | Protects only against positive transients on signal-to-ground paths; ideal for single-ended data lines with defined reference. |
| Low Clamping Voltage | 27.6 V max at 7.2 A ensures downstream 3.3 V or 5 V logic ICs remain within absolute maximum ratings during ESD events. |
| Fast Response Time | Sub-nanosecond turn-on via avalanche breakdown enables clamping before transient energy couples into sensitive receivers. |
| AEC-Q101 Qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock - suitable for ADAS and infotainment modules. |
| Wave & Reflow Solderable | Compatible with standard SMT assembly processes including lead-free reflow (260 °C peak), eliminating hand-soldering or special tooling. |
Applications
| USB 2.0 Interface Protection | HDMI Data Lane Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D− lines in automotive head units against hot-plug ESD and cable discharge events. IC Role / Device Role: Unidirectional TVS diode placed between connector and USB transceiver IC input pins. Use Value: 324 pF capacitance avoids signal integrity degradation at 480 Mbps; 27.6 V clamping prevents damage to 3.3 V PHY inputs. |
Use Scenario: Shielding HDMI TMDS clock and data channels from ESD during board-level integration in digital signage controllers. IC Role / Device Role: Point-of-entry protection diode mounted adjacent to HDMI receptacle, referenced to chassis ground. Use Value: ±30 kV ESD rating meets IEC 61000-4-2 Level 4; DO-219AB footprint allows placement within tight HDMI trace spacing. |
| Automotive CAN FD Bus Protection | Industrial Ethernet PHY Protection |
Use Scenario: Safeguarding CAN FD transceivers in vehicle body control modules exposed to ISO 10605 and IEC 61000-4-2 threats. IC Role / Device Role: Bidirectional protection not required; unidirectional SMF17A-HM3-08 used on CAN_H line with proper grounding strategy. Use Value: 175 °C max junction temperature supports under-dash mounting; AEC-Q101 qualification ensures long-term field reliability. |
Use Scenario: Protecting 10/100BASE-TX PHY differential pairs in factory automation gateways subjected to maintenance-handling ESD. IC Role / Device Role: Discrete TVS on each TX+/TX− and RX+/RX− line, grounded via short low-inductance traces. Use Value: 200 W pulse power handles multiple ESD strikes; 180 K/W thermal resistance enables effective heat dissipation on 2-layer PCBs. |
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 at 6.4 A), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 500 pF capacitance. | Less suitable for high-speed interfaces due to higher capacitance and slower response; better for lower-frequency power rail protection. | Select when board space permits larger package and signal bandwidth < 100 Mbps. |
| TPD2E001DRYR | Integrated dual-channel bidirectional TVS array (0.85 pF per channel), 5 V VRWM, SC-70 package, no AEC-Q101 qualification. | Designed for ultra-high-speed USB 3.0/PCIe; lacks automotive qualification and cannot replace SMF17A-HM3-08 in 17 V systems. | Choose only for low-voltage, high-bandwidth consumer applications where AEC-Q101 is not required. |
Compared with SMAJ17A-E3/57T and TPD2E001DRYR, SMF17A-HM3-08 uniquely balances 17 V stand-off, 324 pF capacitance, AEC-Q101 compliance, and DO-219AB compactness - making it optimal for automotive and industrial high-speed data line protection where size, speed, and qualification are jointly constrained.
Availability
SMF17A-HM3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial Ethernet gateways, and USB-based test equipment requiring stable component supply and long-term lifecycle support.
Supply support for SMF17A-HM3-08 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets high-speed interface protection with AEC-Q101 qualification, low capacitance, and robust ESD performance - engineered specifically for automotive data buses, USB, HDMI, and industrial communication ports.
FAQ
What is the maximum clamping voltage of the SMF17A-HM3-08 under a 10/1000 µs surge?
The SMF17A-HM3-08 has a maximum clamping voltage (VC) of 27.6 V at 7.2 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 and ensures protected ICs remain within safe voltage limits during standardized surge events. The clamping performance is guaranteed across the full operating temperature range of -65 °C to +175 °C.
Is SMF17A-HM3-08 qualified for automotive applications?
Yes, SMF17A-HM3-08 is AEC-Q101 qualified and tested for human body model (HBM) >8 kV, operating temperatures up to +175 °C junction, and full automotive environmental stress screening. It is explicitly listed in Vishay's AEC-Q101 qualified SMF family and approved for use in engine control units, infotainment systems, and ADAS sensor interfaces.
What package does SMF17A-HM3-08 use, and is it compatible with automated SMT assembly?
SMF17A-HM3-08 uses the DO-219AB (SOD-123W-compatible) package - measuring 3.9 mm × 1.9 mm × 1.08 mm - and is fully compatible with wave and reflow soldering. It meets J-STD-020 MSL level 1 and supports peak reflow temperatures up to 260 °C, making it suitable for high-volume automated SMT lines without moisture sensitivity concerns.
How does the capacitance of SMF17A-HM3-08 affect high-speed signal integrity?
With 324 pF typical capacitance at 0 V and 1 MHz, SMF17A-HM3-08 introduces minimal loading on 480 Mbps USB 2.0 and 100BASE-TX Ethernet signals. Its low capacitance preserves signal rise/fall times and eye diagram margins, especially when placed close to connectors with short ground paths. For >1 Gbps interfaces, lower-capacitance alternatives would be required.
Can SMF17A-HM3-08 be used for bidirectional protection?
No - SMF17A-HM3-08 is a unidirectional TVS diode intended for single-polarity transient suppression (e.g., signal-to-ground). It conducts only during positive excursions relative to its cathode. For bidirectional protection (e.g., RS-485, CAN), a dedicated bidirectional part like SMBJ17CA or a dual-diode configuration is required; SMF17A-HM3-08 must not be substituted without circuit redesign.
SMF17A-HM3-08 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):
- 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-HM3-08 FAQ
1.How can I place an order for SMF17A-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF17A-HM3-08 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 SMF17A-HM3-08 reliable?
The price and inventory of SMF17A-HM3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF17A-HM3-08 is usually 5 days.
3.What payment methods are accepted for SMF17A-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF17A-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF17A-HM3-08?
SMF17A-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF17A-HM3-08 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 SMF17A-HM3-08?
For technical support, including SMF17A-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF17A-HM3-08 requirements.
6.How does Aetrix verify that SMF17A-HM3-08 is sourced from the original manufacturer or authorized distributors?
All SMF17A-HM3-08 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 SMF17A-HM3-08 meets industry standards.
7.What is the process for return or replacement of SMF17A-HM3-08?
All SMF17A-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF17A-HM3-08, 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 SMF17A-HM3-08 part is unused and in its original packaging.
Return procedure for SMF17A-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF17A-HM3-08 Tags
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