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Vishay SMF13A-HE3_A08
- Part No.:
- SMF13A-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF13A-HE3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,859
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Product details
Overview
SMF13A-HE3_A08 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 13 V stand-off voltage (VRWM), 21.5 V maximum clamping voltage at 9.3 A peak pulse current, 423 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 SMF13A-HE3_A08 datasheet, SMF13A-HE3_A08 pinout, SMF13A-HE3_A08 application, or SMF13A-HE3_A08 equivalent, this device is selected for USB 2.0, HDMI, automotive infotainment interfaces, and industrial sensor I/O where low clamping voltage, fast response, and robust ESD survivability are critical - not for power rail protection or bidirectional signal paths.
Technical Context
This diode operates as a single-channel, unidirectional TVS (transient voltage suppressor) with avalanche breakdown behavior. Its junction structure delivers sub-nanosecond response time and low incremental surge resistance, enabling effective clamping of ESD transients before downstream ICs are damaged.
The SMF13A-HE3_A08 is optimized for low-capacitance signal-line protection: its 423 pF capacitance at 0 V and 0.1 μA max reverse leakage at VRWM ensure minimal signal integrity impact on 480 Mbps USB 2.0 or 1.65 Gbps HDMI 1.4a differential pairs, while maintaining 175 °C max junction temperature capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 13 V - defines maximum continuous operating voltage before conduction; compatible with 12 V nominal automotive and industrial bus systems. |
| Clamping Voltage (VC) | 21.5 V at 9.3 A (10/1000 μs) - limits transient voltage seen by protected IC to safe level during ESD events. |
| Peak Pulse Power (PPP) | 200 W (10/1000 μs) - sustains short-duration surges without degradation; sufficient for IEC 61000-4-2 Level 4 compliance. |
| Capacitance (CD) | 423 pF at 0 V, 1 MHz - low enough for USB 2.0 full-speed operation without significant signal rise-time degradation. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds automotive OEM requirements for connector-level ESD robustness. |
| AEC-Q101 Qualified | Yes - validated for automotive underhood and cabin applications per stress test conditions 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. |
Pinout & Package
SMF13A-HE3_A08 uses the DO-219AB (SMF) package: a two-terminal, surface-mount, unidirectional diode with cathode marked by a bar. The package is compatible with standard SOD-123W footprint and reflow soldering profiles (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected signal line; conducts during negative transients only when used in unidirectional configuration. |
| Cathode | Ground reference side | Connected to system ground or low-impedance return path; carries surge current to ground during positive ESD events. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping voltage | 21.5 V at 9.3 A ensures protected ICs experience <22 V stress during worst-case 8/20 μs surges. |
| "Low Noise" fast response | Sub-nanosecond turn-on enables clamping before ESD energy couples into sensitive analog/digital inputs. |
| AEC-Q101 qualification | Validated for automotive environments including temperature cycling, mechanical shock, and HBM > 8 kV. |
| Wave and reflow solderable | Compatible with J-STD-020 MSL level 1 handling and standard lead-free reflow profiles up to 260 °C peak. |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meets automotive and industrial safety standards for board-level fire resistance. |
Applications
| USB 2.0 Data Lines | HDMI 1.4a Differential Pairs |
|---|---|
Use Scenario: Protection of D+ and D− pins on USB 2.0 host/device connectors against repeated ESD events during plugging/unplugging. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and ground, with cathode tied to ground. Use Value: 423 pF capacitance avoids signal integrity loss at 480 Mbps; 21.5 V clamping prevents damage to USB PHY transceivers rated for ≤24 V abs max. |
Use Scenario: ESD protection for TMDS clock and data channels on HDMI source/sink ports exposed to user-accessible connectors. IC Role / Device Role / Timing Role: Single-channel unidirectional clamp per differential pair, mounted adjacent to connector with minimal trace length. Use Value: Low capacitance preserves edge rate and eye diagram integrity; ±30 kV ESD rating exceeds HDMI Compliance Test Specification v1.4 requirement. |
| Automotive Infotainment I/O | Industrial Sensor Interface |
Use Scenario: Protecting CAN-FD, LIN, or audio codec I/O pins in head units and display modules subjected to in-vehicle ESD coupling. IC Role / Device Role / Timing Role: Point-of-entry protection on external-facing signal lines, leveraging AEC-Q101 qualification for reliability. Use Value: 175 °C operating range supports under-dash mounting; 13 V VRWM aligns with 12 V vehicle electrical system nominal voltage. |
Use Scenario: Safeguarding RS-485, I²C, or analog sensor inputs (e.g., pressure, temperature) in factory automation equipment with frequent operator interaction. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA max) unidirectional clamp that avoids DC loading on precision sensor bias networks. Use Value: 0.1 μA reverse current at 13 V minimizes offset error in mV-level sensor outputs; DO-219AB footprint eases automated placement in high-volume production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A-E3/5A (Vishay) | Higher 1500 W PPP (8/20 μs), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 550 pF capacitance. | Better for higher-energy surges (e.g., lightning-induced), but excessive capacitance for USB/HDMI. | Select SMAJ13A-E3/5A only when surge energy exceeds 200 W and board space allows larger footprint. |
| TPD2E001DRYR (TI) | 2-channel, bidirectional, 12 pF capacitance, 12 V VRWM, not AEC-Q101 qualified. | Optimized for ultra-high-speed interfaces (e.g., USB 3.0, MIPI), lacks automotive qualification and single-channel flexibility. | Choose TPD2E001DRYR for multi-line, low-capacitance, non-automotive designs where bidirectional clamping is required. |
Compared with SMAJ13A-E3/5A and TPD2E001DRYR, the SMF13A-HE3_A08 uniquely balances AEC-Q101 qualification, 423 pF capacitance suitable for USB 2.0, and compact DO-219AB packaging - making it optimal for cost-sensitive, space-constrained automotive and industrial signal-line protection where moderate surge energy suffices.
Availability
SMF13A-HE3_A08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, and USB 2.0 peripheral protection requiring stable component supply across extended product lifecycles.
Supply support for SMF13A-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 power management, sensing, and circuit protection components with emphasis on reliability and automotive-grade validation.
The SMF series targets high-reliability ESD protection for automotive and industrial signal lines, delivering low-clamp, low-capacitance TVS performance in miniature surface-mount packages aligned with AEC-Q101 and IEC 61000-4-2 standards.
FAQ
What is the maximum clamping voltage of the SMF13A-HE3_A08 under standard IEC 61000-4-5 surge conditions?
The SMF13A-HE3_A08 has a maximum clamping voltage of 21.5 V when subjected to a 10/1000 μs waveform at 9.3 A peak pulse current. This value is specified in the Electrical Characteristics table and reflects the voltage seen by downstream circuitry during standardized surge events - critical for ensuring protected ICs remain within absolute maximum ratings. The SMF13A-HE3_A08 does not specify clamping for the 8/20 μs IEC 61000-4-5 waveform; its 1000 W PPP rating applies to that condition, but VC must be interpolated or measured.
Is the SMF13A-HE3_A08 suitable for bidirectional signal lines like RS-485 or CAN?
No, the SMF13A-HE3_A08 is a unidirectional ESD protection diode and is not suitable for bidirectional differential buses without additional circuitry. Its design assumes a defined polarity: anode to signal, cathode to ground. For RS-485 or CAN, bidirectional TVS devices such as the SMBJ13CA or dedicated dual-rail protectors are required. Using SMF13A-HE3_A08 on bidirectional lines risks forward conduction during normal signal swings, potentially disrupting communication. Always verify polarity alignment before deploying SMF13A-HE3_A08.
Does the SMF13A-HE3_A08 meet automotive qualification standards?
Yes, the SMF13A-HE3_A08 is AEC-Q101 qualified, as confirmed in the Vishay datasheet Rev. 2.4. It passes stress tests including human body model (HBM) > 8 kV, temperature cycling, and mechanical shock - validating its suitability for automotive cabin and under-hood applications. The "HE3" in the part number denotes AEC-Q101 qualification and halogen-free construction, while "_A08" indicates 3K per 7″ reel packaging. This makes SMF13A-HE3_A08 appropriate for Tier 1 suppliers and OEMs requiring certified components.
What is the thermal resistance (RthJA) of the SMF13A-HE3_A08 when mounted on a standard PCB?
The SMF13A-HE3_A08 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. This value is measured under standardized conditions and informs thermal design margins - for example, at 100 mW steady-state dissipation, junction temperature rise would be ~18 °C above ambient. In real-world layouts with enhanced copper area or thermal vias, RthJA improves significantly. The SMF13A-HE3_A08's 175 °C max junction temperature allows operation in high-ambient environments when properly heatsinked.
How does the capacitance of the SMF13A-HE3_A08 affect high-speed signal integrity?
The SMF13A-HE3_A08 exhibits 423 pF typical capacitance at 0 V and 1 MHz, which is low enough to avoid measurable degradation on USB 2.0 full-speed (480 Mbps) signals but may limit use in USB 3.0 or HDMI 2.0+ interfaces where <1–2 pF is preferred. Its capacitance decreases with increasing reverse bias - dropping to ~100 pF at 10 V - so proper VRWM selection (13 V) ensures minimal dynamic loading during normal operation. For SMF13A-HE3_A08, this balance enables robust ESD protection without compromising rise time or impedance matching in mid-speed digital links.
SMF13A-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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 423pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF13A-HE3_A08 FAQ
1.How can I place an order for SMF13A-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF13A-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 SMF13A-HE3_A08 reliable?
The price and inventory of SMF13A-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 SMF13A-HE3_A08 is usually 5 days.
3.What payment methods are accepted for SMF13A-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF13A-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF13A-HE3_A08?
SMF13A-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF13A-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 SMF13A-HE3_A08?
For technical support, including SMF13A-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF13A-HE3_A08 requirements.
6.How does Aetrix verify that SMF13A-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF13A-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 SMF13A-HE3_A08 meets industry standards.
7.What is the process for return or replacement of SMF13A-HE3_A08?
All SMF13A-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF13A-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 SMF13A-HE3_A08 part is unused and in its original packaging.
Return procedure for SMF13A-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF13A-HE3_A08 Tags
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