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Vishay General Semiconductor - Diodes Division SMF9V0A-HM3-18
- Part No.:
- SMF9V0A-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF9V0A-HM3-18.pdf
- Description:
- TVS DIODE 9VWM 15.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:4,195
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Product details
Overview
SMF9V0A-HM3-18 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 9.0 V stand-off voltage (VRWM), 15.4 V maximum clamping voltage at 13.5 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 USB interfaces.
For engineers reviewing the SMF9V0A-HM3-18 datasheet, SMF9V0A-HM3-18 pinout, SMF9V0A-HM3-18 application, or SMF9V0A-HM3-18 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, and validated alternatives for automotive-grade signal line protection.
Technical Context
This diode operates as a unidirectional TVS device with a single protection path, optimized for low-capacitance (640 pF at 0 V, 1 MHz) and fast response to ESD transients. Its junction temperature range spans −65 °C to +175 °C, and it maintains stable reverse leakage (<0.1 μA at VRWM) across its full operating range.
The SMF9V0A-HM3-18 uses silicon planar technology with "Low Noise" design for sub-nanosecond response, enabling effective clamping of IEC 61000-4-2 contact/air discharges without signal distortion in 100 Mbps+ interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 9.0 V - Maximum continuous reverse voltage before significant leakage; sets operating margin above 5 V/9 V logic rails. |
| Clamping Voltage (VC) | 15.4 V max at IPPM = 13.5 A - Limits downstream IC voltage stress during 10/1000 μs surges. |
| Peak Pulse Power | 200 W (10/1000 μs) - Sustains short-duration transients common in automotive and industrial environments. |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Meets highest system-level ESD robustness requirements. |
| Capacitance | 640 pF at 0 V, 1 MHz - Low enough for USB 2.0 and CAN FD signal integrity, but not suitable for PCIe Gen3+. |
| AEC-Q101 Qualified | Yes - Validated for automotive underhood and cabin applications per stress test conditions. |
| Package | DO-219AB (SOD-123W compatible footprint) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline for dense PCB layouts. |
Pinout & Package
SMF9V0A-HM3-18 is housed in the DO-219AB (SMF) package: a 2-terminal, cathode-marked, surface-mount plastic case measuring 3.9 mm × 1.9 mm × 1.08 mm max. It is compatible with SOD-123W land patterns and supports wave/reflow soldering per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to protected signal line (e.g., USB D+); conducts surge current toward ground when clamped. |
| Cathode | Ground reference terminal | Connected to system ground plane; defines unidirectional conduction path and establishes clamping threshold relative to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Low incremental surge resistance | Enables tight clamping (15.4 V @ 13.5 A) with minimal voltage overshoot during fast transients. |
| "Low Noise" fast-response technology | Sub-nanosecond turn-on ensures clamping activation before sensitive ICs experience overstress. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD stress per AEC standard. |
| SOD-123W footprint compatibility | Allows drop-in replacement in existing designs using industry-standard SOD-123W layout and assembly processes. |
Applications
| Automotive USB Port Protection | Industrial CAN FD Interface |
|---|---|
Use Scenario: Protecting USB 2.0 data lines in vehicle infotainment head units exposed to ESD during connector insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between D+ and ground, clamping transients before they reach the USB transceiver IC. Use Value: Maintains signal integrity up to 480 Mbps while surviving ±30 kV contact discharge-critical for AEC-Q101-compliant automotive systems. | Use Scenario: Safeguarding CAN FD physical layer transceivers in factory automation controllers subject to cable-induced surges. IC Role / Device Role / Timing Role: Standoff-clamp TVS on CAN_H line, referenced to chassis ground, suppressing 10/1000 μs surges without distorting 5 Mbps differential signaling. Use Value: 640 pF capacitance avoids CAN FD bit timing skew; 15.4 V clamping prevents transceiver latch-up during ISO 16750-2 load dump events. |
| Consumer HDMI Source Port | Medical Sensor Interface |
Use Scenario: ESD protection on HDMI DDC (I²C) lines in set-top boxes handling frequent hot-plug events. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional diode (cathode-to-ground) protecting SDA/SCL against user-handling ESD. Use Value: 9.0 V VRWM exceeds I²C bus voltage (3.3 V), ensuring no leakage during normal operation while delivering ±30 kV system-level immunity. | Use Scenario: Shielding analog front-end inputs of portable ECG monitors connected via detachable leads. IC Role / Device Role / Timing Role: First-line transient suppressor on electrode input traces, limiting voltage excursion to <15.4 V during electrostatic discharge. Use Value: 175 °C max junction temperature supports sterilization cycles; low leakage (<0.1 μA) preserves microvolt-level signal accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | Higher clamping voltage (17.5 V), larger SMA package (4.5 mm × 2.7 mm), 400 W peak power (10/1000 μs) | Less suitable for space-constrained automotive modules; better for higher-energy surges in industrial power supplies | Select SMAJ9.0A only if board area allows larger footprint and clamping voltage margin >17.5 V is acceptable. |
| TPD2E001DRYR | 2-channel, 15 pF per line, 5.5 V VRWM, integrated ESD array in USON-6; not AEC-Q101 qualified | Designed for high-speed digital buses (USB, HDMI) where ultra-low capacitance is mandatory; lacks automotive qualification | Choose TPD2E001DRYR for consumer USB 2.0 ports needing <20 pF loading; avoid for automotive or high-energy surge environments. |
Compared with SMAJ9.0A and TPD2E001DRYR, SMF9V0A-HM3-18 uniquely balances AEC-Q101 compliance, compact DO-219AB size, 640 pF capacitance, and precise 9.0 V standoff-making it optimal for automotive signal line protection where space, reliability, and standardized qualification are jointly critical.
Availability
SMF9V0A-HM3-18 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 traceability.
Supply support for SMF9V0A-HM3-18 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 high-speed interface protection in harsh environments, with design emphasis on low clamping, AEC-Q101 qualification, and compatibility with automated SMT assembly for mission-critical applications.
FAQ
What is the clamping voltage of the SMF9V0A-HM3-18 under a 10/1000 μs surge?
The SMF9V0A-HM3-18 has a maximum reverse clamping voltage (VC) of 15.4 V when subjected to its rated peak pulse current of 13.5 A with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures downstream ICs remain below absolute maximum ratings during surge events. The SMF9V0A-HM3-18 achieves this clamping performance while maintaining low incremental resistance and fast response.
Is SMF9V0A-HM3-18 suitable for bidirectional signal lines like RS-485?
No - the SMF9V0A-HM3-18 is a unidirectional TVS diode, configured with anode and cathode terminals for single-polarity clamping (cathode to ground). For true bidirectional protection on balanced lines such as RS-485, a symmetric dual-diode array or dedicated bidirectional TVS like SMBJ9.0CA is required. The SMF9V0A-HM3-18 must be used in conjunction with complementary devices or only on unidirectional lines like USB D+ or CAN_H with proper grounding.
Does SMF9V0A-HM3-18 meet automotive qualification standards?
Yes - the SMF9V0A-HM3-18 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD robustness per the AEC-Q101 standard. This qualification confirms suitability for automotive applications including body electronics, infotainment, and ADAS subsystems where reliability under thermal and electrical stress is mandatory. The SMF9V0A-HM3-18 carries the "H" grade code indicating AEC-Q101 compliance.
What is the thermal resistance (RthJA) of SMF9V0A-HM3-18 on a standard PCB?
The junction-to-ambient thermal resistance (RthJA) of SMF9V0A-HM3-18 is 180 K/W when mounted on an epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 μm thick. This value reflects typical thermal performance in standard SMT layouts and informs derating calculations for repetitive surge duty cycles. At ambient temperatures up to +125 °C, the SMF9V0A-HM3-18 maintains full functionality within its 175 °C max junction rating.
How does the capacitance of SMF9V0A-HM3-18 affect high-speed signal integrity?
The SMF9V0A-HM3-18 exhibits 640 pF typical capacitance at 0 V and 1 MHz, which is appropriate for USB 2.0 (480 Mbps) and CAN FD (5 Mbps) but too high for USB 3.2 Gen 1 (5 Gbps) or PCIe Gen3 (8 GT/s), where sub-10 pF loading is required. Its capacitance rolls off with increasing reverse bias, dropping to ~100 pF at 5 V VR - a behavior confirmed in Vishay's Fig. 5–12. Designers must verify eye diagram margins when using SMF9V0A-HM3-18 on any high-speed link.
SMF9V0A-HM3-18 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 13.5A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 640pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF9V0A-HM3-18 FAQ
1.How can I place an order for SMF9V0A-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF9V0A-HM3-18 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 SMF9V0A-HM3-18 reliable?
The price and inventory of SMF9V0A-HM3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF9V0A-HM3-18 is usually 5 days.
3.What payment methods are accepted for SMF9V0A-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF9V0A-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF9V0A-HM3-18?
SMF9V0A-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF9V0A-HM3-18 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 SMF9V0A-HM3-18?
For technical support, including SMF9V0A-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF9V0A-HM3-18 requirements.
6.How does Aetrix verify that SMF9V0A-HM3-18 is sourced from the original manufacturer or authorized distributors?
All SMF9V0A-HM3-18 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 SMF9V0A-HM3-18 meets industry standards.
7.What is the process for return or replacement of SMF9V0A-HM3-18?
All SMF9V0A-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF9V0A-HM3-18, 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 SMF9V0A-HM3-18 part is unused and in its original packaging.
Return procedure for SMF9V0A-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF9V0A-HM3-18 Tags
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