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Vishay General Semiconductor - Diodes Division SMF8V5A-HM3-18
- Part No.:
- SMF8V5A-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF8V5A-HM3-18.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:4,862
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Product details
Overview
SMF8V5A-HM3-18 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 8.5 V stand-off voltage, 9.44–10.5 V reverse breakdown at 1 mA, 13.9 A peak pulse current (10/1000 μs), 14.4 V maximum clamping voltage at IPPM, and 674 pF typical junction capacitance at 0 V and 1 MHz.
For engineers reviewing the SMF8V5A-HM3-18 datasheet, SMF8V5A-HM3-18 pinout, SMF8V5A-HM3-18 application, or SMF8V5A-HM3-18 equivalent, this device is selected for I/O line protection in automotive infotainment, USB 2.0 interfaces, and industrial sensor signal conditioning where ±30 kV IEC 61000-4-2 ESD immunity and AEC-Q101 qualification are required.
Technical Context
This diode operates as a unidirectional TVS device with cathode-anode polarity, optimized for fast response to electrostatic discharge events. Its "Low Noise" technology ensures sub-nanosecond response time, and its low incremental surge resistance enables effective clamping during 10/1000 μs transients up to 200 W peak pulse power.
The SMF8V5A-HM3-18 is rated for operation from –65 °C to +175 °C, qualified to AEC-Q101, and compatible with wave and reflow soldering per J-STD-020 MSL level 1 (peak 260 °C). Its DO-219AB package provides a compact 3.9 mm × 1.9 mm footprint with 1.08 mm max height and 15 mg weight.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 8.5 V - Maximum continuous reverse operating voltage before significant leakage begins; sets upper limit for protected line DC bias. |
| Breakdown Voltage (VBR) | 9.44–10.5 V at 1 mA - Confirmed reverse conduction onset range; defines ESD triggering threshold under test conditions. |
| Clamping Voltage (VC) | 14.4 V at 13.9 A - Peak voltage seen by downstream circuit during worst-case 10/1000 μs surge; determines IC survivability margin. |
| Junction Capacitance (CD) | 674 pF at 0 V, 1 MHz - Measured signal-line loading; impacts high-frequency integrity in USB 2.0 or CAN FD interfaces. |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Validated robustness against human-body and system-level ESD events. |
| AEC-Q101 Qualification | Qualified - Confirmed reliability for automotive applications including temperature cycling, HBM >8 kV, and mechanical stress testing. |
Pinout & Package
The SMF8V5A-HM3-18 uses the DO-219AB (SMF) package: a low-profile, surface-mount, molded plastic case with cathode marking bar. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H), weight 15 mg, UL 94 V-0 molding compound, MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Protected Line Terminal | Connected to signal line requiring ESD protection; carries surge current into diode during overvoltage event. |
| Cathode | Ground Reference Terminal | Connected to system ground or low-impedance return path; completes clamping loop and establishes reference for VRWM and VC. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W Peak Pulse Power (10/1000 μs) | Enables reliable suppression of high-energy transients without thermal runaway in compact PCB layouts. |
| ±30 kV ESD Immunity (IEC 61000-4-2) | Meets automotive and industrial ESD immunity requirements without external shielding or layout reinforcement. |
| Low Incremental Surge Resistance | Minimizes voltage overshoot during fast-rising ESD pulses, improving clamping precision and downstream IC safety. |
| SOD-123W/SOD-123F/SOD-123FL Compatibility | Allows drop-in replacement or layout reuse across Vishay's eSMP® platform with identical footprint constraints. |
Applications
| Automotive Infotainment Interfaces | USB 2.0 Data Lines |
|---|---|
Use Scenario: Protecting HDMI, LVDS, or FPD-Link III video signal paths in head units and digital dashboards exposed to assembly-line ESD and vehicle-level surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector entry point to clamp transients before reaching SerDes ICs or display controllers. Use Value: Prevents latch-up or gate oxide damage in high-speed serializer/deserializer ICs while maintaining <1 ns response and minimal signal distortion. | Use Scenario: Safeguarding D+ and D− lines in automotive-grade USB host/device ports used for firmware updates and diagnostics. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp integrated adjacent to USB PHY to meet USB-IF ESD compliance without degrading eye diagram integrity. Use Value: Maintains full-speed USB 2.0 signal fidelity (480 Mbps) with only 674 pF loading and clamps to ≤14.4 V during ±30 kV contact discharge. |
| Industrial Sensor Signal Conditioning | RS-485 Transceiver Protection |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA, 0–10 V) from ESD in factory-floor pressure, temperature, or flow sensors. IC Role / Device Role / Timing Role: Standoff-voltage-matched TVS placed between sensor output and PLC input to prevent false readings or ADC saturation. Use Value: Ensures stable 8.5 V VRWM aligns with common industrial supply rails, avoiding leakage-induced offset errors in precision analog chains. | Use Scenario: Protecting differential bus lines in industrial automation RS-485 nodes subjected to cable coupling and field ESD. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional diode pair (one per line) referenced to local ground to suppress common-mode surges on A/B lines. Use Value: Delivers 14.4 V clamping at 13.9 A while preserving RS-485 common-mode range (–7 V to +12 V) and noise margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A-E3/5A | Higher clamping voltage (15.0 V), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 600 pF capacitance. | Less suitable for high-speed data lines due to higher VC and larger footprint; better for power rail protection. | Select when board space allows larger package and higher clamping is acceptable for non-data-line use. |
| TPD2E001DRYR | 2-channel, 15 pF ultra-low capacitance, 5.5 V VRWM, not AEC-Q101 qualified, SOT-553 package. | Designed for USB Type-C and high-speed digital interfaces; lacks automotive qualification and higher stand-off voltage. | Choose for consumer-grade high-speed interfaces where low capacitance outweighs automotive reliability needs. |
Compared with SMAJ8.5A-E3/5A and TPD2E001DRYR, the SMF8V5A-HM3-18 uniquely balances AEC-Q101 qualification, 8.5 V stand-off, 674 pF capacitance, and DO-219AB compactness-making it optimal for space-constrained automotive data line protection where both ESD robustness and signal integrity are critical.
Availability
SMF8V5A-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, and USB 2.0 peripheral designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant ESD protection.
Supply support for SMF8V5A-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 power management, sensing, and protection devices with emphasis on reliability, miniaturization, and automotive-grade qualification.
The SMF series belongs to Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for high-reliability ESD and surge protection in automotive, industrial, and communications applications where compact size and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of the SMF8V5A-HM3-18 under standard test conditions?
The SMF8V5A-HM3-18 has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current of 13.9 A using a 10/1000 μs waveform. This value is measured at the device terminals and represents the highest voltage seen by the protected circuit during an ESD or surge event, ensuring downstream ICs remain within safe operating limits.
Is the SMF8V5A-HM3-18 qualified for automotive applications?
Yes, the SMF8V5A-HM3-18 is AEC-Q101 qualified, confirming its suitability for automotive environments. It meets rigorous stress tests including temperature cycling, humidity bias, mechanical shock, and human body model ESD (>8 kV), making it appropriate for use in infotainment systems, ADAS sensors, and body control modules where reliability under extreme conditions is essential.
What package type does the SMF8V5A-HM3-18 use, and what are its key mechanical dimensions?
The SMF8V5A-HM3-18 uses the DO-219AB (SMF) package: a low-profile surface-mount outline measuring 3.9 mm in length, 1.9 mm in width, and 1.08 mm maximum height, with a weight of 15 mg. Its cathode is marked by a bar on the top surface, and it complies with J-STD-020 MSL level 1 for reflow compatibility.
How does the junction capacitance of the SMF8V5A-HM3-18 affect high-speed signal integrity?
The SMF8V5A-HM3-18 exhibits 674 pF typical junction capacitance at 0 V and 1 MHz, which introduces controlled loading on protected lines. While higher than ultra-low-capacitance TVS devices, this value is well-suited for USB 2.0 and industrial serial interfaces where bandwidth demands are moderate (<500 Mbps), and the trade-off delivers superior clamping performance and AEC-Q101 reliability.
Can the SMF8V5A-HM3-18 be used in bidirectional protection configurations?
No-the SMF8V5A-HM3-18 is a unidirectional TVS diode, intended for circuits with defined polarity such as power rails or single-ended data lines referenced to ground. For true bidirectional protection (e.g., RS-485 or AC-coupled signals), two SMF8V5A-HM3-18 devices must be connected in series opposition, or a dedicated bidirectional part like SMBJ8.5CA should be selected instead.
SMF8V5A-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 13.9A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 674pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF8V5A-HM3-18 FAQ
1.How can I place an order for SMF8V5A-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF8V5A-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 SMF8V5A-HM3-18 reliable?
The price and inventory of SMF8V5A-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 SMF8V5A-HM3-18 is usually 5 days.
3.What payment methods are accepted for SMF8V5A-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF8V5A-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF8V5A-HM3-18?
SMF8V5A-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF8V5A-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 SMF8V5A-HM3-18?
For technical support, including SMF8V5A-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF8V5A-HM3-18 requirements.
6.How does Aetrix verify that SMF8V5A-HM3-18 is sourced from the original manufacturer or authorized distributors?
All SMF8V5A-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 SMF8V5A-HM3-18 meets industry standards.
7.What is the process for return or replacement of SMF8V5A-HM3-18?
All SMF8V5A-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF8V5A-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 SMF8V5A-HM3-18 part is unused and in its original packaging.
Return procedure for SMF8V5A-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF8V5A-HM3-18 Tags
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