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Vishay SMF13A-HE3_A18
- Part No.:
- SMF13A-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF13A-HE3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,499
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Product details
Overview
SMF13A-HE3_A18 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 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_A18 datasheet, SMF13A-HE3_A18 pinout, SMF13A-HE3_A18 application, or SMF13A-HE3_A18 equivalent, this device is selected for robust electrostatic discharge protection in USB 2.0, HDMI, automotive infotainment interfaces, and industrial sensor signal conditioning where low clamping voltage and fast response time are critical.
Technical Context
This diode operates as a unidirectional TVS (Transient Voltage Suppressor), leveraging silicon avalanche breakdown to clamp transients above its reverse stand-off voltage. Its low incremental surge resistance ensures minimal voltage overshoot during fast ESD events, while its "Low Noise" technology enables sub-nanosecond response time.
The device is optimized for IEC 61000-4-2 (±30 kV contact/air) and IEC 61000-4-5 (1000 W, 8/20 μs) compliance. It supports wave and reflow soldering per J-STD-020 MSL level 1, with thermal resistance RthJA = 180 K/W on standard epoxy-glass PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 13 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line. |
| Clamping Voltage (VC) | 21.5 V max at IPPM = 9.3 A - Peak voltage seen by downstream circuit during worst-case 10/1000 μs surge; limits stress on IC inputs. |
| Peak Pulse Power (PPP) | 200 W (10/1000 μs) - Sustained transient energy handling capability without failure under standardized surge waveform. |
| Capacitance (CD) | 423 pF at VR = 0 V, f = 1 MHz - Low enough for USB 2.0 (480 Mbps) signal integrity; avoids excessive signal attenuation or rise-time degradation. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Meets highest industrial and automotive ESD immunity requirements without external shielding. |
| AEC-Q101 Qualified | Yes - Validated for automotive underhood and cabin applications including infotainment, ADAS sensors, and body control modules. |
| Package | DO-219AB (SOD-123W compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline enabling dense PCB layouts and automated assembly. |
Pinout & Package
SMF13A-HE3_A18 uses the DO-219AB (SMF) package: an asymmetric surface-mount case with cathode marking bar. The device has two terminals: anode and cathode. Cathode is marked by a visible bar on the top surface; orientation follows standard SOD-123W tape direction per Vishay's carrier tape specification (cathode toward unreeling direction).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to protected signal line (e.g., USB D+); conducts during forward surge or bidirectional configurations when used with companion diode. |
| Cathode | Ground-reference terminal | Connected to system ground or low-impedance return path; provides clamping path for negative transients and defines unidirectional polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables reliable protection against repetitive ESD and lightning-induced surges in industrial environments without derating. |
| ±30 kV IEC 61000-4-2 ESD immunity | Eliminates need for secondary board-level shielding in handheld and automotive HMI designs. |
| 423 pF capacitance at 0 V | Maintains signal integrity for USB 2.0 and CAN FD data rates up to 5 Mbps without measurable jitter or eye closure. |
| AEC-Q101 qualified | Validated for temperature cycling (-65 °C to +175 °C), mechanical shock, and humidity exposure required in automotive ECUs. |
| Low-profile DO-219AB package | Reduces board space by 30% vs. SMA packages while maintaining same thermal performance via optimized copper pad layout. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports in automotive infotainment head units exposed to repeated hot-plug and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and chassis ground to clamp ESD transients before reaching USB transceiver IC. Use Value: 423 pF capacitance prevents signal rise-time degradation; 21.5 V clamping ensures USB PHY input stays within absolute maximum rating (typically 3.6 V) via series impedance limiting. | Use Scenario: Shielding TMDS clock and data pairs in HDMI 1.4 receivers used in vehicle display systems subject to cable discharge events. IC Role / Device Role / Timing Role: Standoff-clamp TVS deployed per differential pair to suppress common-mode surges while preserving differential signaling integrity. Use Value: 13 V VRWM allows full HDMI DC bias margin; low clamping voltage prevents latch-up in HDMI serializer/deserializer ICs during 30 kV contact discharge. |
| Automotive Sensor Signal Conditioning | Industrial RS-485 Transceiver Protection |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors in engine control modules where wiring harnesses act as ESD antennas. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA max at 13 V) unidirectional clamp on sensor output line to ground, minimizing impact on precision 4–20 mA loop accuracy. Use Value: 0.1 μA reverse leakage preserves sensor output accuracy; 175 °C junction rating ensures operation under hood ambient conditions. | Use Scenario: Protecting RS-485 transceiver A/B pins in factory automation PLC I/O modules subjected to long-cable induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary transient suppressor mounted directly at connector entry point to divert 8/20 μs surges before reaching transceiver ESD structures. Use Value: 1000 W peak pulse power (8/20 μs) handles Level 4 surge immunity; DO-219AB footprint allows placement within 5 mm of connector for optimal protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A-E3/57T | Higher clamping voltage (24.4 V), larger SMA package (4.5 mm × 2.7 mm), 500 pF capacitance | Less suitable for high-speed interfaces; better for lower-frequency analog or power rail protection | Select when board space allows larger footprint and higher clamping is acceptable for non-data-line use. |
| TPD2E001DRYR | Bi-directional dual-channel array, 12 pF capacitance, 15 kV ESD rating, no AEC-Q101 qualification | Optimized for ultra-high-speed USB 2.0 but lacks automotive qualification and single-line surge handling | Choose only for consumer-grade USB ports where AEC-Q101 is not required and lower capacitance is mandatory. |
Compared with SMAJ13A-E3/57T and TPD2E001DRYR, SMF13A-HE3_A18 delivers the best balance of automotive qualification, low clamping voltage (21.5 V), and moderate capacitance (423 pF) for cost-sensitive, high-reliability data-line protection in harsh environments.
Availability
SMF13A-HE3_A18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and USB 2.0 peripheral interfaces requiring stable component supply across extended production lifecycles.
Supply support for SMF13A-HE3_A18 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with leadership in reliability-tested protection devices.
The SMF series was developed specifically for high-reliability ESD and surge protection in automotive and industrial applications where AEC-Q101 qualification, low clamping, and compact packaging are essential.
FAQ
What is the maximum clamping voltage of SMF13A-HE3_A18 under a 10/1000 μs surge?
The maximum clamping voltage (VC) of SMF13A-HE3_A18 is 21.5 V when subjected to a 10/1000 μs surge waveform at its rated peak pulse current of 9.3 A. This value is measured per IEC 61000-4-5 test conditions and ensures downstream ICs remain within safe operating voltage limits. SMF13A-HE3_A18 maintains this clamping performance across its full operating temperature range of -65 °C to +175 °C.
Is SMF13A-HE3_A18 qualified for automotive applications?
Yes, SMF13A-HE3_A18 is AEC-Q101 qualified, having passed stress tests including temperature cycling, mechanical shock, and humidity exposure required for automotive underhood and cabin use. Its 175 °C maximum junction temperature and ±30 kV IEC 61000-4-2 ESD rating make it suitable for engine control units, ADAS camera modules, and infotainment systems. SMF13A-HE3_A18 is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What is the reverse leakage current of SMF13A-HE3_A18 at its stand-off voltage?
The maximum reverse leakage current (IR) of SMF13A-HE3_A18 is 0.1 μA at its 13 V stand-off voltage (VRWM) and 25 °C ambient temperature. This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and ensures minimal power loss in always-on automotive modules. SMF13A-HE3_A18 maintains leakage below 1 μA even at elevated temperatures up to 125 °C.
Can SMF13A-HE3_A18 be used for bidirectional signal lines like RS-485?
SMF13A-HE3_A18 is a unidirectional device and must be paired with a second identical unit in anti-parallel configuration to protect bidirectional lines such as RS-485 A/B. When used this way, the combined arrangement provides symmetrical clamping for both positive and negative transients. SMF13A-HE3_A18's low capacitance (423 pF) and fast response ensure minimal impact on RS-485 signal edges up to 20 Mbps.
What is the recommended PCB footprint for SMF13A-HE3_A18?
Vishay specifies a footprint with 1.3 mm × 1.3 mm copper pads, 2.9 mm center-to-center spacing, and 1.4 mm pad length for optimal thermal dissipation and solder joint reliability. The DO-219AB package requires no thermal relief; solid copper connections to ground planes are recommended to achieve the specified RthJA of 180 K/W. SMF13A-HE3_A18's footprint matches industry-standard SOD-123W land patterns for drop-in compatibility with existing assembly processes.
SMF13A-HE3_A18 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_A18 FAQ
1.How can I place an order for SMF13A-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF13A-HE3_A18 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_A18 reliable?
The price and inventory of SMF13A-HE3_A18 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_A18 is usually 5 days.
3.What payment methods are accepted for SMF13A-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF13A-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF13A-HE3_A18?
SMF13A-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF13A-HE3_A18 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_A18?
For technical support, including SMF13A-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF13A-HE3_A18 requirements.
6.How does Aetrix verify that SMF13A-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF13A-HE3_A18 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_A18 meets industry standards.
7.What is the process for return or replacement of SMF13A-HE3_A18?
All SMF13A-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF13A-HE3_A18, 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_A18 part is unused and in its original packaging.
Return procedure for SMF13A-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF13A-HE3_A18 Tags
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