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Vishay SMF17A-HE3_A08
- Part No.:
- SMF17A-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF17A-HE3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,611
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Product details
Overview
SMF17A-HE3_A08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for clamping transient overvoltages on signal or power lines. It features a 17 V stand-off voltage (VRWM), 27.6 V maximum reverse 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-HE3_A08 datasheet, SMF17A-HE3_A08 pinout, SMF17A-HE3_A08 application, or SMF17A-HE3_A08 equivalent, this device is selected for high-reliability ESD suppression in compact automotive infotainment interfaces, USB 2.0 data lines, and industrial sensor signal conditioning where low clamping voltage and robust surge handling are critical.
Technical Context
The SMF17A-HE3_A08 operates as a unidirectional avalanche diode with a 17 V working peak reverse voltage and 18.9–20.9 V breakdown range at 1 mA test current. Its low incremental surge resistance enables fast clamping response (<1 ns), and its 200 W peak pulse power rating (10/1000 μs) supports repeated transient suppression without degradation.
Designed for SOD-123W-compatible footprints, it delivers 324 pF capacitance at 0 V and 0.1 μA maximum reverse leakage at VRWM - balancing ESD robustness with signal integrity for DC-coupled analog and digital lines up to ~100 MHz bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 15 V nominal systems. |
| Clamping Voltage (VC) | 27.6 V max at IPPM = 7.2 A - limits transient voltage seen by downstream ICs during 10/1000 μs surges. |
| Peak Pulse Power (PPP) | 200 W (10/1000 μs) - sustains single or low-duty-cycle transients common in automotive load-dump or ESD events. |
| Capacitance (CD) | 324 pF at 0 V, 1 MHz - suitable for low-speed interfaces (e.g., CAN, LIN, I²C) but not high-speed USB 3.0 or HDMI. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for automotive and industrial end-equipment. |
| AEC-Q101 Qualified | Yes - validated for automotive underhood and cabin applications requiring extended temperature operation (-65 °C to +175 °C). |
| Package | DO-219AB (SOD-123W footprint) - 3.9 mm × 1.9 mm × 1.08 mm low-profile package compatible with automated SMT assembly and reflow. |
Pinout & Package
SMF17A-HE3_A08 uses the DO-219AB (SOD-123W) surface-mount package with two terminals: anode and cathode. The cathode is marked by a bar on the device body. Mounting follows standard SMT guidelines with 1.3 mm × 1.3 mm pad dimensions and 2.9 mm center-to-center spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Input/line side connection | Connected to protected line (e.g., USB D+, CAN_H); conducts during forward surge or ESD event to ground path. |
| Cathode (bar-marked end) | Ground reference terminal | Connected to system ground or low-impedance return path; establishes clamping threshold relative to GND. |
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 surge events. |
| Ultra-fast response | <1 ns turn-on time enables effective suppression of ESD pulses defined in IEC 61000-4-2 (rise time 0.7–1 ns). |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress - suitable for Tier-1 module designs. |
| Wave and reflow solderable | Compatible with standard Pb-free reflow profiles (peak 260 °C), supporting high-volume manufacturing without special process steps. |
| Low-profile packaging | 1.08 mm height enables use in space-constrained modules such as telematics control units and ADAS camera housings. |
Applications
| Automotive Infotainment Display Interface | Industrial RS-485 Communication Line |
|---|---|
Use Scenario: Protecting LVDS or FPD-Link III video data lines between head unit and display panel against ESD during service or environmental exposure. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed inline between serializer/deserializer ICs and connector pins. Use Value: Prevents latch-up or gate oxide damage in display driver ICs while maintaining signal integrity via 324 pF capacitance and 17 V VRWM margin over 12 V supply rails. |
Use Scenario: Safeguarding RS-485 transceiver inputs/outputs in factory automation PLCs exposed to cable-induced surges and operator ESD. IC Role / Device Role / Timing Role: Standalone ESD clamp on differential bus lines (A/B), referenced to local ground plane. Use Value: Enables compliance with IEC 61000-4-2 Level 4 and IEC 61000-4-5 (1 kV surge) without degrading common-mode rejection or data rate (≤20 Mbps). |
| USB 2.0 Host Port Protection | Automotive LIN Bus Node |
Use Scenario: Clamping ESD events on USB D+ and D− lines of automotive diagnostic ports or infotainment USB hosts. IC Role / Device Role / Timing Role: Dual-diode configuration (one per line) with cathodes tied to chassis ground; used with series impedance matching. Use Value: Maintains USB 2.0 full-speed signaling integrity (480 Mbps) due to low capacitance and avoids false disconnect detection caused by excessive clamping overshoot. |
Use Scenario: Protecting LIN transceiver pins in door modules, seat controllers, or lighting nodes from battery disconnect transients and tool-based ESD. IC Role / Device Role / Timing Role: Single unidirectional diode per LIN line (LIN-bus to GND), leveraging 17 V VRWM to tolerate 14 V nominal vehicle supply variations. Use Value: Ensures uninterrupted LIN communication during cranking (6–7 V) and load dump (up to 40 V) by clamping above VRWM but below transceiver breakdown limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/57T | Same VRWM (17 V), higher VC (33.2 V), larger SMA package (4.5 mm × 2.7 mm), 500 W PPP (10/1000 μs) | Higher power handling but 2× footprint area; less suitable for ultra-compact PCB layouts | Choose SMAJ17A-E3/57T when surge energy exceeds 200 W or board space allows larger package. |
| TPD2E001DRYR | Lower capacitance (12 pF), dual-channel, 5.5 V VRWM, not AEC-Q101 qualified, 30 kV ESD rating | Optimized for high-speed data (USB 2.0, HDMI), lacks automotive qualification and 17 V standoff capability | Choose TPD2E001DRYR only for non-automotive, high-frequency signal lines requiring sub-15 pF loading. |
Compared with SMAJ17A-E3/57T and TPD2E001DRYR, SMF17A-HE3_A08 uniquely balances AEC-Q101 qualification, 17 V standoff, compact DO-219AB size, and 324 pF capacitance - making it optimal for cost-sensitive, space-constrained automotive and industrial signal-line protection where moderate bandwidth suffices.
Availability
SMF17A-HE3_A08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and USB 2.0 host port protection requiring stable component supply across long production lifecycles.
Supply support for SMF17A-HE3_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 ESD-sensitive signal and power lines in harsh environments, with design emphasis on AEC-Q101 compliance, low clamping voltage, and SMT manufacturability for automotive ECUs and industrial controls.
FAQ
What is the maximum clamping voltage of the SMF17A-HE3_A08 under standard test conditions?
The SMF17A-HE3_A08 has a maximum reverse clamping voltage (VC) of 27.6 V when subjected to a 10/1000 μs peak pulse current of 7.2 A. This value is measured per IEC 61000-4-5 and ensures protected ICs remain within safe operating limits. The clamping behavior is consistent across the full operating temperature range of -65 °C to +175 °C, as verified in Vishay's AEC-Q101 qualification testing for SMF17A-HE3_A08.
Is SMF17A-HE3_A08 suitable for bidirectional signal lines like USB D+ and D−?
No - SMF17A-HE3_A08 is a unidirectional ESD protection diode, optimized for clamping positive transients to ground. For bidirectional lines such as USB D+ and D−, two SMF17A-HE3_A08 devices must be used in opposing polarity (anode-to-line/cathode-to-ground and cathode-to-line/anode-to-ground), or a dedicated bidirectional part like SMF17CA should be selected. The unidirectional nature of SMF17A-HE3_A08 is confirmed in the "Protection Paths" column of the Electrical Characteristics table, which specifies "1" channel and no symmetrical breakdown data.
Does SMF17A-HE3_A08 meet automotive qualification standards?
Yes - SMF17A-HE3_A08 is explicitly AEC-Q101 qualified, as stated in the Features section and Ordering Information table of the Vishay datasheet (Document Number: 85881, Rev. 2.4). This qualification covers stress tests including HTGB, H3TRB, temperature cycling, and ESD, validating its suitability for automotive cabin and under-hood applications operating from -65 °C to +175 °C. The "HE3" in SMF17A-HE3_A08 denotes AEC-Q101 qualification and RoHS-compliant lead-free terminations.
What is the thermal resistance (RthJA) of SMF17A-HE3_A08 on a standard PCB?
The junction-to-ambient thermal resistance (RthJA) of SMF17A-HE3_A08 is 180 K/W when mounted on an epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 μm thick, per the Absolute Maximum Ratings table. This value assumes standard SMT layout practices and directly impacts power derating: at 70 °C ambient, the device can safely dissipate ~0.56 W continuously without exceeding its 175 °C junction limit. No heatsinking is required for transient ESD events due to their short duration.
Can SMF17A-HE3_A08 be used in place of SMF15A or SMF18A without circuit redesign?
Substitution requires verification - SMF17A-HE3_A08 has a 17 V VRWM, distinct from SMF15A (15 V) and SMF18A (18 V), meaning clamping onset and system margin differ. While all share identical DO-219AB packaging and pinout, changing to SMF17A-HE3_A08 may alter transient response timing and voltage overshoot in sensitive analog circuits. The datasheet confirms no drop-in compatibility statement; selection must be based on actual line voltage, tolerance stack-up, and clamping margin analysis for each specific SMF17A-HE3_A08 application.
SMF17A-HE3_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-HE3_A08 FAQ
1.How can I place an order for SMF17A-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF17A-HE3_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-HE3_A08 reliable?
The price and inventory of SMF17A-HE3_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-HE3_A08 is usually 5 days.
3.What payment methods are accepted for SMF17A-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF17A-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF17A-HE3_A08?
SMF17A-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF17A-HE3_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-HE3_A08?
For technical support, including SMF17A-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF17A-HE3_A08 requirements.
6.How does Aetrix verify that SMF17A-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF17A-HE3_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-HE3_A08 meets industry standards.
7.What is the process for return or replacement of SMF17A-HE3_A08?
All SMF17A-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF17A-HE3_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-HE3_A08 part is unused and in its original packaging.
Return procedure for SMF17A-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF17A-HE3_A08 Tags
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