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Vishay General Semiconductor - Diodes Division SMF13A-M3-18
- Part No.:
- SMF13A-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF13A-M3-18.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:7,922
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Product details
Overview
SMF13A-M3-18 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, and 423 pF typical junction capacitance at 0 V - optimized for USB 2.0, HDMI, and industrial I/O port protection.
For engineers reviewing the SMF13A-M3-18 datasheet, SMF13A-M3-18 pinout, SMF13A-M3-18 application, or SMF13A-M3-18 equivalent, this device delivers verified ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification, and low-noise fast-response clamping for signal integrity-critical interfaces requiring robust overvoltage resilience without signal distortion.
Technical Context
The SMF13A-M3-18 operates as a single-channel unidirectional TVS diode with avalanche breakdown behavior, triggered when reverse voltage exceeds its 14.4–16.0 V breakdown range (VBR). Its low incremental surge resistance ensures stable clamping under 10/1000 μs transients, while its SOD-123W-compatible DO-219AB package enables high-density PCB layouts with MSL Level 1 moisture sensitivity and 260 °C reflow compatibility.
It supports bidirectional system-level ESD protection via cathode-grounded configuration and maintains <0.1 μA leakage at VRWM (13 V), enabling low-power interface protection in battery-operated and automotive-grade applications where standby current and thermal stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 13 V - defines maximum continuous operating voltage before clamping begins; suitable for 12 V nominal bus systems. |
| Breakdown Voltage (VBR) | 14.4–16.0 V at 1 mA - precise avalanche threshold ensuring reliable triggering without premature conduction. |
| Clamping Voltage (VC) | 21.5 V max at 9.3 A IPPM - limits downstream voltage during 10/1000 μs surges to protect 24 V-rated ICs. |
| Junction Capacitance (CD) | 423 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) and RS-485, but not recommended for USB 3.0+. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds industrial and automotive ESD immunity requirements. |
| Peak Pulse Power | 200 W at 10/1000 μs - sustains short-duration surges without degradation in compact SMT footprint. |
| AEC-Q101 Qualified | Yes - validated for automotive electronics including infotainment and body control modules. |
Pinout & Package
SMF13A-M3-18 uses the DO-219AB (SMF) package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, molded epoxy case with cathode band marking. Compatible with SOD-123W footprint and standard reflow profiles (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected signal line; conducts surge current toward cathode during overvoltage events. |
| Cathode | Ground reference | Connected to system ground or low-impedance return path; defines unidirectional clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Noise Fast Response | Sub-nanosecond turn-on enables clamping before ESD pulse edge damages sensitive receivers. |
| Wave & Reflow Solderable | Qualified for J-STD-020 MSL Level 1 - no baking required prior to assembly; supports automated SMT lines. |
| Low Incremental Surge Resistance | Minimizes voltage overshoot during high di/dt transients, improving clamping precision vs. higher-Rsurge devices. |
| AEC-Q101 Qualified | Validated for automotive underhood and cabin environments per stress test requirements (HTOL, TC, HAST). |
| UL 94 V-0 Mold Compound | Self-extinguishing encapsulation meets flammability safety standards for industrial and transportation end equipment. |
Applications
| USB 2.0 Port Protection | HDMI DDC Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 data lines (D+/D−) against ESD events during hot-plug insertion in industrial docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and ground, clamping transients before they reach the USB transceiver. Use Value: 423 pF capacitance avoids signal integrity degradation at 480 Mbps, while ±30 kV ESD rating exceeds IEC 61000-4-2 compliance margin. |
Use Scenario: Safeguarding HDMI Display Data Channel (DDC) lines (SCL/SDA) from electrostatic discharge in AV receivers and set-top boxes. IC Role / Device Role / Timing Role: Standoff-limited clamping device on 5 V-tolerant I²C bus lines, preserving timing margins and logic thresholds. Use Value: 13 V VRWM aligns with HDMI DDC's 5 V supply + margin; 21.5 V VC prevents latch-up in upstream level shifters. |
| Automotive Body Control Module I/O | Industrial RS-485 Transceiver Interface |
Use Scenario: Protecting LIN bus or sensor input pins in automotive body control units exposed to assembly-line ESD and load-dump coupling. IC Role / Device Role / Timing Role: Primary ESD suppressor on 12 V nominal signal paths, integrated into front-end filtering network. Use Value: AEC-Q101 qualification and -65 °C to +175 °C operating range ensure reliability across vehicle lifecycle conditions. |
Use Scenario: Shielding RS-485 transceiver A/B differential pairs from field-induced surges in factory automation PLCs and motor drives. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on each line referenced to common ground, minimizing skew. Use Value: 200 W peak pulse power handles repetitive 10/1000 μs noise without derating; DO-219AB footprint fits tight 0.8 mm pitch layouts. |
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-E3/57T | DO-214AC (SMA) package; 200 W Pppm; 22.5 V VC @ 9.1 A; 500 pF CD | Larger footprint (4.5 × 2.7 mm); higher capacitance limits use in >100 Mbps interfaces | Preferred where board space allows and higher surge margin is needed; not drop-in due to package mismatch. |
| TPD2E001DRYR | 0402 dual-channel ESD array; 15 V VRWM; 12 V VC @ 1 A; 12 pF CD | Lower power (20 W Pppm); optimized for ultra-high-speed digital (USB 3.0, MIPI) | Select for high-frequency signal lines where capacitance must be <15 pF; insufficient for 9.3 A surge handling. |
Compared with SMAJ13A-E3/57T and TPD2E001DRYR, SMF13A-M3-18 uniquely balances 9.3 A surge capability, 423 pF capacitance, and DO-219AB miniaturization - making it optimal for cost-sensitive, medium-speed industrial and automotive interfaces where both robustness and layout density matter.
Availability
SMF13A-M3-18 is available at Aetrix Electronics and suitable for USB 2.0 port protection, HDMI DDC line safeguarding, and automotive body control module I/O requiring stable component supply across production ramps and long-life programs.
Supply support for SMF13A-M3-18 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 compact, high-surge ESD protection for space-constrained PCBs in automotive and industrial electronics, emphasizing AEC-Q101 qualification, low-profile packaging, and repeatable clamping performance.
FAQ
What is the clamping voltage of SMF13A-M3-18 at its rated peak pulse current?
The SMF13A-M3-18 has a maximum clamping voltage (VC) of 21.5 V when subjected to its rated 9.3 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures downstream circuitry remains within safe voltage limits during surge events. The SMF13A-M3-18 achieves this with low incremental resistance, minimizing overshoot beyond VC.
Is SMF13A-M3-18 suitable for bidirectional signal lines like RS-485?
No - SMF13A-M3-18 is a unidirectional TVS diode, configured for cathode-to-ground operation. For true bidirectional protection on RS-485 A/B lines, a symmetric dual-diode array (e.g., SM712) or back-to-back configuration is required. The SMF13A-M3-18 can protect one side of a differential pair if referenced to ground, but does not suppress positive transients on the anode side without additional circuitry.
Does SMF13A-M3-18 meet automotive qualification standards?
Yes - SMF13A-M3-18 is AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and humidity acceleration (HAST). Its -65 °C to +175 °C operating range and DO-219AB package construction support deployment in engine control units, body modules, and infotainment systems per automotive OEM requirements.
What is the moisture sensitivity level (MSL) of SMF13A-M3-18?
The SMF13A-M3-18 has a Moisture Sensitivity Level (MSL) of Level 1 per J-STD-020, meaning it is not moisture-sensitive and may be stored indefinitely at ambient conditions without baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates floor-life tracking for the SMF13A-M3-18 in SMT assembly lines.
How does the 423 pF capacitance of SMF13A-M3-18 affect high-speed signal integrity?
The 423 pF typical junction capacitance of SMF13A-M3-18 limits its use to interfaces up to ~480 Mbps (e.g., USB 2.0 full-speed), where signal rise times are ≥1 ns. At higher frequencies (e.g., USB 3.0, HDMI 1.4+), this capacitance introduces excessive loading and jitter. For such applications, lower-capacitance alternatives (<15 pF) should be selected - the SMF13A-M3-18 is intentionally optimized for robustness over bandwidth.
SMF13A-M3-18 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- 423pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF13A-M3-18 FAQ
1.How can I place an order for SMF13A-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF13A-M3-18 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-M3-18 reliable?
The price and inventory of SMF13A-M3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF13A-M3-18 is usually 5 days.
3.What payment methods are accepted for SMF13A-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF13A-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF13A-M3-18?
SMF13A-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF13A-M3-18 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-M3-18?
For technical support, including SMF13A-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF13A-M3-18 requirements.
6.How does Aetrix verify that SMF13A-M3-18 is sourced from the original manufacturer or authorized distributors?
All SMF13A-M3-18 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-M3-18 meets industry standards.
7.What is the process for return or replacement of SMF13A-M3-18?
All SMF13A-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF13A-M3-18, 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-M3-18 part is unused and in its original packaging.
Return procedure for SMF13A-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF13A-M3-18 Tags
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