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Vishay SMF17A-HM3_A08
- Part No.:
- SMF17A-HM3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF17A-HM3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,913
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Product details
Overview
SMF17A-HM3_A08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for high-speed data line and power rail protection. It features a 17 V stand-off voltage (VRWM), 18.9–20.9 V reverse breakdown range (VBR), 7.2 A peak pulse current (IPPM), 27.6 V maximum clamping voltage (VC), and 324 pF typical capacitance at 0 V - optimized for USB 2.0, HDMI, and industrial I/O interfaces.
For engineers reviewing the SMF17A-HM3_A08 datasheet, SMF17A-HM3_A08 pinout, SMF17A-HM3_A08 application, or SMF17A-HM3_A08 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification status, SOD-123W-compatible footprint, and low incremental surge resistance for robust transient suppression in automotive and industrial control systems.
Technical Context
This device operates as a unidirectional TVS diode with avalanche breakdown behavior, delivering fast response (<1 ns) to electrostatic discharge events per IEC 61000-4-2. Its low clamping ratio (VC/VBR ≈ 1.45) and 200 W peak pulse power rating (10/1000 µs) ensure effective voltage limiting during transients without compromising signal integrity on high-speed lines.
The SMF17A-HM3_A08 is rated for continuous operation from –65 °C to +175 °C, with thermal resistance RthJA = 180 K/W on standard epoxy-glass PCBs. Its DO-219AB package supports wave and reflow soldering, meets MSL Level 1 per J-STD-020, and complies with AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 17 V - maximum continuous reverse operating voltage before leakage exceeds 0.1 µA; defines safe operating margin for 12 V nominal rails. |
| Breakdown Voltage (VBR) | 18.9–20.9 V at 1 mA - ensures reliable avalanche conduction onset within tight tolerance for predictable clamping. |
| Clamping Voltage (VC) | 27.6 V max at 7.2 A IPPM - limits transient voltage to protect downstream ICs such as microcontrollers or PHYs. |
| Peak Pulse Power (PPP) | 200 W (10/1000 µs) - sustains standardized lightning-surge energy without degradation in single-event stress. |
| Capacitance (CD) | 324 pF at 0 V, 1 MHz - suitable for <10 Mbps digital interfaces; low enough to avoid signal distortion on USB 2.0 D+/D– lines. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds industrial and automotive ESD immunity requirements. |
| Operating Temp Range | –65 °C to +175 °C - enables deployment in under-hood automotive, motor drives, and harsh-environment industrial controls. |
Pinout & Package
SMF17A-HM3_A08 uses the DO-219AB (SMF) package: low-profile (1.08 mm height), 3.9 mm × 1.9 mm footprint, cathode-marked anode-cathode configuration. Compatible with SOD-123W, SOD-123F, and SOD-123FL land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input/Line side terminal | Connected to protected signal or power line; conducts surge current toward cathode during overvoltage event. |
| Cathode (Pin 2) | Ground/reference terminal | Connected to system ground or low-impedance return path; establishes clamping reference and completes transient current loop. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise fast-response technology | Sub-nanosecond response time ensures clamping activation before ESD pulse reaches sensitive circuitry. |
| AEC-Q101 qualified variant | SMF17A-HM3_A08 includes AEC-Q101 qualification - validated for automotive electronics including infotainment and body control modules. |
| 200 W peak pulse power (10/1000 µs) | Provides robust protection against repetitive surges in industrial PLC I/O and factory automation interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping accuracy and system-level reliability. |
| Solder-reflow compatible packaging | DO-219AB construction supports automated assembly with peak temperature up to 260 °C - no special process required. |
Applications
| Industrial Sensor Interface | Automotive Infotainment Port |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., 4–20 mA current loops or 0–10 V voltage signals) from ESD in factory floor environments. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between sensor output and ADC input to clamp transients before they reach precision signal conditioning circuitry. Use Value: Maintains signal fidelity with 324 pF capacitance and 27.6 V clamping, preventing ADC saturation or latch-up during ±30 kV ESD events. | Use Scenario: Shielding USB 2.0 and HDMI ports in head units and display modules from user-handling ESD in vehicles. IC Role / Device Role / Timing Role: Line-side ESD suppressor on differential data pairs, leveraging low capacitance and fast response to preserve signal rise/fall times. Use Value: Enables compliance with ISO 10605 and IEC 61000-4-2 while maintaining eye diagram integrity at 480 Mbps USB 2.0 speeds. |
| Motor Drive Control Input | Smart Meter Communication Port |
Use Scenario: Safeguarding isolated digital inputs (e.g., optocoupler-driven enable lines) in variable-frequency drives exposed to switching noise and field ESD. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor on logic-level control lines, absorbing coupled surges from adjacent high-power gate drivers. Use Value: 17 V VRWM aligns with 24 V control rails; 27.6 V VC prevents false triggering of microcontroller GPIOs during 50 A surge tests. | Use Scenario: Protecting RS-485 and M-Bus communication lines in utility smart meters installed in outdoor enclosures. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional diode used in conjunction with series impedance to suppress common-mode surges on twisted-pair buses. Use Value: Withstands repeated 10/1000 µs surges up to 200 W and operates reliably across –65 °C to +175 °C ambient - critical for wide-temperature deployments. |
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), 400 W PPP rating | Better suited for higher-energy surges but less space-efficient; higher capacitance (450 pF) limits use on >10 Mbps lines | Select when board area allows and surge energy exceeds 200 W - not drop-in due to footprint and height mismatch |
| TPD2E001DRYR | Low-capacitance (12 pF), dual-channel, 5 V VRWM, not AEC-Q101 qualified, 120 W PPP | Optimized for high-speed USB/DisplayPort; unsuitable for 12–24 V power rail or automotive-grade reliability | Choose only for low-voltage, high-speed data lines where sub-15 pF capacitance is mandatory - not interchangeable for SMF17A-HM3_A08's voltage or qualification requirements |
Compared with SMAJ17A-E3/57T and TPD2E001DRYR, SMF17A-HM3_A08 uniquely balances 17 V standoff, 27.6 V clamping, AEC-Q101 qualification, and compact DO-219AB packaging - making it optimal for space-constrained, high-reliability 12–24 V interface protection where both ESD and surge immunity are required.
Availability
SMF17A-HM3_A08 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive infotainment ports, and motor drive control inputs requiring stable component supply and long-term lifecycle support.
Supply support for SMF17A-HM3_A08 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-density ESD protection in automotive and industrial electronics, with design focus on AEC-Q101 qualification, low-profile packaging, and precise clamping performance for modern high-speed interfaces.
FAQ
What is the clamping voltage of SMF17A-HM3_A08 at its rated peak pulse current?
The SMF17A-HM3_A08 has a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPPM) of 7.2 A using a 10/1000 µs waveform. This value is measured under standardized surge conditions and ensures downstream ICs remain below their absolute maximum voltage ratings during transient events. The SMF17A-HM3_A08 achieves this with low incremental surge resistance, minimizing overshoot beyond the specified VC.
Is SMF17A-HM3_A08 qualified to AEC-Q101?
Yes, SMF17A-HM3_A08 is AEC-Q101 qualified - confirmed by Vishay's documentation for the SMF family with "H" suffix in the ordering code. This qualification covers stress tests including HBM (>8 kV), temperature cycling, and high-temperature operating life, validating suitability for automotive applications such as body electronics and infotainment systems. The SMF17A-HM3_A08 meets all requirements for Grade 0 (–40 °C to +150 °C) and extended-range operation up to +175 °C.
What package type does SMF17A-HM3_A08 use, and is it compatible with standard SOD-123 footprints?
SMF17A-HM3_A08 uses the DO-219AB (SMF) package - a low-profile, surface-mount case with 3.9 mm × 1.9 mm outline and 1.08 mm height. Vishay explicitly states compatibility with SOD-123W, SOD-123F, and SOD-123FL land patterns. While dimensions differ slightly (e.g., SOD-123W is 3.7 mm × 1.7 mm), the SMF17A-HM3_A08's recommended footprint (1.3 mm × 2.9 mm pad layout) ensures mechanical and thermal reliability in reflow assembly without requiring PCB redesign.
What is the maximum junction temperature rating for SMF17A-HM3_A08?
The SMF17A-HM3_A08 has a maximum junction temperature (TJ) rating of +175 °C, with a corresponding storage and operating temperature range of –65 °C to +175 °C. This extended range supports deployment in under-hood automotive locations, industrial motor drives, and outdoor metering equipment. Thermal resistance from junction-to-ambient (RthJA) is 180 K/W when mounted on a standard 3 mm × 3 mm Cu pad on epoxy-glass PCB, enabling accurate thermal modeling for high-power transient duty cycles.
How does the capacitance of SMF17A-HM3_A08 affect high-speed signal integrity?
The SMF17A-HM3_A08 exhibits 324 pF typical capacitance at 0 V and 1 MHz, which is appropriate for interfaces up to ~10 Mbps (e.g., RS-485, CAN FD physical layer, industrial I²C). For higher-speed links like USB 2.0 (480 Mbps), this capacitance must be evaluated in context: combined with series impedance and trace length, it may impact rise time but remains acceptable when placed close to connectors with proper layout. The SMF17A-HM3_A08's low clamping voltage and fast response help offset capacitive loading effects during ESD events.
SMF17A-HM3_A08 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-HM3_A08 FAQ
1.How can I place an order for SMF17A-HM3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF17A-HM3_A08 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_A08 reliable?
The price and inventory of SMF17A-HM3_A08 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_A08 is usually 5 days.
3.What payment methods are accepted for SMF17A-HM3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF17A-HM3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF17A-HM3_A08?
SMF17A-HM3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF17A-HM3_A08 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_A08?
For technical support, including SMF17A-HM3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF17A-HM3_A08 requirements.
6.How does Aetrix verify that SMF17A-HM3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF17A-HM3_A08 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_A08 meets industry standards.
7.What is the process for return or replacement of SMF17A-HM3_A08?
All SMF17A-HM3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF17A-HM3_A08, 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_A08 part is unused and in its original packaging.
Return procedure for SMF17A-HM3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF17A-HM3_A08 Tags
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