My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMF17A-HE3-08
- Part No.:
- SMF17A-HE3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF17A-HE3-08.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF17A-HE3-08 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, ±30 kV IEC 61000-4-2 ESD immunity, and 200 W peak pulse power (10/1000 μs). It is AEC-Q101 qualified and used in automotive infotainment interfaces.
For engineers reviewing the SMF17A-HE3-08 datasheet, SMF17A-HE3-08 pinout, SMF17A-HE3-08 application, or SMF17A-HE3-08 equivalent, key selection criteria include clamping voltage vs. protected IC's absolute maximum rating, capacitance (324 pF at 0 V) for signal integrity, thermal resistance (180 K/W), and SOD-123W-compatible footprint compatibility with automated assembly.
Technical Context
The SMF17A-HE3-08 operates as a unidirectional TVS diode with avalanche breakdown behavior, optimized for fast response to ESD transients (sub-nanosecond rise time per IEC 61000-4-2). Its low incremental surge resistance ensures minimal voltage overshoot during 7.2 A transient events.
It is rated for continuous operation from –65 °C to +175 °C, supports wave and reflow soldering (peak 260 °C), and meets AEC-Q101 stress test requirements including H3B-class human body model (>8 kV) and ±30 kV contact/air discharge - making it suitable for under-hood and dashboard electronics where thermal and ESD robustness are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 17 V - Maximum continuous reverse voltage before significant leakage; sets minimum operating margin above circuit nominal voltage. |
| Clamping Voltage (VC) | 27.6 V max at IPPM = 7.2 A - Peak voltage seen by protected IC during worst-case transient; must be below IC's absolute maximum rating. |
| Peak Pulse Power | 200 W (10/1000 μs) - Sustains short-duration surges without degradation; defines energy-handling capability in telecom/data line protection. |
| Capacitance | 324 pF at 0 V, 1 MHz - Impacts high-frequency signal integrity; suitable for USB 2.0 or CAN FD but not PCIe Gen3+. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Exceeds automotive OEM requirements for touch-sensitive control panels. |
| Thermal Resistance | 180 K/W (RthJA on 3 mm × 3 mm Cu pad) - Determines steady-state temperature rise under leakage; informs PCB copper area design. |
| Package | DO-219AB (SOD-123W compatible) - Low-profile (1.08 mm height), 3.9 mm × 1.9 mm footprint; enables dense layout in space-constrained modules. |
Pinout & Package
SMF17A-HE3-08 uses the DO-219AB (SMF) package: molded, surface-mount, cathode-bar marked, single-channel unidirectional configuration. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H); weight: 15 mg; MSL level 1; UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input side of protected line | Connected to signal trace upstream of IC input; carries transient current into device during clamping. |
| Cathode (Pin 2) | Ground reference node | Connected to low-impedance system ground plane; provides return path for surge current; cathode bar marking identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| "Low Noise" fast-response technology | Sub-nanosecond response to ESD events ensures clamping initiates before protected IC sustains damage. |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment displays. |
| Wave and reflow solderable | Compatible with standard SMT processes up to 260 °C peak, eliminating hand-soldering risk in production. |
| Low incremental surge resistance | Minimizes voltage overshoot during high-current transients, improving protection margin for 3.3 V/5 V logic interfaces. |
| SOD-123W footprint compatibility | Enables drop-in replacement or shared PCB land pattern across Vishay's SMF family and legacy SOD-123 designs. |
Applications
| Automotive Infotainment Display Interface | Industrial CAN FD Bus Node |
|---|---|
Use Scenario: Protecting HDMI or LVDS video data lines between head unit and TFT display in vehicles exposed to ESD from user touch. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector entry point to clamp transients before reaching serializer/deserializer ICs. Use Value: 27.6 V clamping voltage ensures safe operation with 3.3 V or 5 V interface ICs; 324 pF capacitance avoids signal distortion at 1080p60 rates. | Use Scenario: Shielding CAN FD transceivers in factory automation controllers from ESD induced via cable handling or nearby switching noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on CANH/CANL lines, absorbing fast transients while maintaining bus differential signaling integrity. Use Value: ±30 kV ESD rating exceeds ISO 10605 requirements; 17 V VRWM aligns with CAN FD common-mode range (–2 V to +7 V differential, ~12 V common-mode). |
| Medical Patient Monitor Sensor Port | Smart Building PoE-Powered Access Control Reader |
Use Scenario: Safeguarding analog front-end inputs of ECG or SpO₂ sensor interfaces against accidental ESD during clinical use. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA at VRWM) unidirectional suppressor placed adjacent to op-amp input stage. Use Value: 0.1 μA max reverse leakage prevents DC offset errors in precision biopotential amplifiers; 175 °C TJ rating supports sterilization cycles. | Use Scenario: Protecting Ethernet PHY inputs on PoE-powered door readers installed in high-traffic lobbies subject to frequent static discharge. IC Role / Device Role / Timing Role: Primary ESD clamp on 10/100BASE-TX pairs, coordinated with secondary filtering on PHY side. Use Value: 200 W pulse power handles multiple IEC 61000-4-2 strikes without parameter shift; DO-219AB package withstands mechanical stress from repeated cable insertion. |
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 package (4.5 mm × 2.7 mm), lower capacitance (220 pF) | Better suited for higher-voltage industrial I/O where board space allows larger footprint | Select when lower capacitance is prioritized over compact size and tighter clamping margin. |
| TPD2EUSB30DRYR | Integrated dual-channel USB 3.0 ESD protector (0.8 pF per line), 3.6 V VRWM, no AEC-Q101 qualification | Designed specifically for high-speed differential USB 3.0 lanes; not suitable for 17 V bias rails | Choose only for USB 3.0 Type-A/B interfaces requiring ultra-low capacitance; not a functional substitute for SMF17A-HE3-08's voltage rating or automotive qualification. |
Compared with SMAJ17A-E3/57T and TPD2EUSB30DRYR, SMF17A-HE3-08 delivers optimal balance of low clamping (27.6 V), compact DO-219AB packaging, and AEC-Q101 compliance - making it the preferred choice for space-constrained automotive and industrial data-line protection where 17 V standoff and ±30 kV ESD immunity are mandatory.
Availability
SMF17A-HE3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN FD nodes, and medical sensor interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMF17A-HE3-08 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 power management, sensing, and protection components with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMF series targets high-reliability ESD protection in automotive, industrial, and medical electronics, engineered to meet stringent AEC-Q101 requirements while maintaining low profile and high surge robustness.
FAQ
What is the maximum clamping voltage of the SMF17A-HE3-08 under specified test conditions?
The SMF17A-HE3-08 has a maximum clamping voltage (VC) of 27.6 V when subjected to a 10/1000 μs waveform with a peak pulse current (IPPM) of 7.2 A. This value is measured per the electrical characteristics table in Vishay's Document Number 85881, Rev. 2.4. The clamping voltage defines the upper limit of voltage imposed on protected circuitry during transient events, and SMF17A-HE3-08 maintains this performance across its full operating temperature range (–65 °C to +175 °C).
Is SMF17A-HE3-08 qualified for automotive applications?
Yes, SMF17A-HE3-08 is AEC-Q101 qualified and rated for human body model (HBM) Class H3B (>8 kV) and IEC 61000-4-2 ±30 kV contact/air discharge. Its construction, testing, and packaging meet automotive reliability standards for under-hood and cabin electronics. The SMF17A-HE3-08 datasheet explicitly lists AEC-Q101 qualification in the FEATURES section and confirms compliance in the ordering information table - confirming its suitability for automotive infotainment, ADAS, and body control modules.
What is the capacitance of SMF17A-HE3-08 and how does it affect high-speed signal lines?
The SMF17A-HE3-08 exhibits a typical capacitance of 324 pF at 0 V and 1 MHz, as specified in the Electrical Characteristics table. This value impacts signal integrity on high-speed lines: it is appropriate for USB 2.0, CAN FD, and RS-485, but may introduce excessive loading on PCIe Gen3+ or HDMI 2.0+ interfaces. Designers should verify eye diagram margins when using SMF17A-HE3-08 on data lines exceeding 100 Mbps; for such cases, lower-capacitance alternatives like the TPD2EUSB30DRYR (0.8 pF) may be considered - though they lack the 17 V standoff and AEC-Q101 rating of SMF17A-HE3-08.
Does SMF17A-HE3-08 have a unidirectional or bidirectional configuration?
SMF17A-HE3-08 is a unidirectional TVS diode, indicated by its single reverse breakdown voltage specification (VBR min/max), absence of symmetric clamping data, and designation as "Nchannel" in the Electrical Characteristics table. Its cathode-bar marking and anode/cathode pinout confirm polarity-sensitive placement - it must be oriented with cathode toward ground to protect positive-going transients on a line referenced to ground. Bidirectional variants (e.g., SMBJ17CA) are separate part numbers and not interchangeable with SMF17A-HE3-08 without circuit redesign.
What is the thermal resistance and maximum junction temperature of SMF17A-HE3-08?
The SMF17A-HE3-08 has a junction-to-ambient thermal resistance (RthJA) of 180 K/W when mounted on an epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 μm thick, and a maximum junction temperature (TJ) of +175 °C. This allows reliable operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. The 175 °C TJ rating also supports reflow soldering profiles and intermittent high-power surge dissipation without parametric shift - a key advantage confirmed in Vishay's AEC-Q101 stress testing for SMF17A-HE3-08.
SMF17A-HE3-08 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-HE3-08 FAQ
1.How can I place an order for SMF17A-HE3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF17A-HE3-08 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-HE3-08 reliable?
The price and inventory of SMF17A-HE3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF17A-HE3-08 is usually 5 days.
3.What payment methods are accepted for SMF17A-HE3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF17A-HE3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF17A-HE3-08?
SMF17A-HE3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF17A-HE3-08 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-HE3-08?
For technical support, including SMF17A-HE3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF17A-HE3-08 requirements.
6.How does Aetrix verify that SMF17A-HE3-08 is sourced from the original manufacturer or authorized distributors?
All SMF17A-HE3-08 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-HE3-08 meets industry standards.
7.What is the process for return or replacement of SMF17A-HE3-08?
All SMF17A-HE3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF17A-HE3-08, 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-HE3-08 part is unused and in its original packaging.
Return procedure for SMF17A-HE3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF17A-HE3-08 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
