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Vishay General Semiconductor - Diodes Division SMF7V5A-HM3-18
- Part No.:
- SMF7V5A-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF7V5A-HM3-18.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:5,999
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Product details
Overview
SMF7V5A-HM3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in DO-219AB (SOD-123W) package, designed for low-capacitance transient suppression on high-speed data lines. It features a 7.5 V stand-off voltage (VRWM), 8.33–9.3 V reverse breakdown range (VBR), 12.9 V maximum clamping voltage at 15.5 A peak pulse current (VC), 773 pF typical capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity.
For engineers reviewing the SMF7V5A-HM3-18 datasheet, SMF7V5A-HM3-18 pinout, SMF7V5A-HM3-18 application, or SMF7V5A-HM3-18 equivalent, this device is selected for robust electrostatic discharge protection in automotive infotainment interfaces, USB 2.0 signal paths, and industrial sensor I/O where low clamping voltage and sub-1 nF capacitance are critical to signal integrity.
Technical Context
This diode operates as a unidirectional avalanche clamp with cathode-anode polarity, leveraging silicon planar technology to deliver fast response (<1 ns) and low incremental surge resistance. Its 12.9 V clamping voltage at 15.5 A (10/1000 μs) ensures effective overvoltage limiting during ESD events while maintaining minimal forward voltage drop (2.5 V at 50 A surge).
The device meets AEC-Q101 qualification for automotive use, supports wave and reflow soldering per J-STD-020 MSL level 1, and exhibits stable performance across -65 °C to +175 °C operating temperature range - enabling deployment in under-hood and powertrain control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 7.5 V - Maximum continuous reverse voltage before significant leakage; sets operating margin for 5 V–6 V logic interfaces. |
| Breakdown Voltage (VBR) | 8.33–9.3 V at 1 mA - Ensures reliable triggering above normal signal swing while avoiding false clamping. |
| Clamping Voltage (VC) | 12.9 V max at IPPM = 15.5 A (10/1000 μs) - Limits transient voltage seen by downstream ICs to safe levels during ESD. |
| Capacitance (CD) | 773 pF at VR = 0 V, f = 1 MHz - Low enough for USB 2.0 (480 Mbps) and CAN FD signal integrity without excessive rise-time degradation. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Exceeds Level 4 immunity requirements for consumer and automotive electronics. |
| Peak Pulse Power | 200 W (10/1000 μs), 1000 W (8/20 μs) - Handles multiple ESD strikes and lightning-induced surges in industrial fieldbus nodes. |
| Leakage Current (IR) | 0.1 μA max at VRWM = 7.5 V - Minimizes standby power loss and avoids signal distortion in high-impedance analog sensing paths. |
Pinout & Package
SMF7V5A-HM3-18 uses the DO-219AB (SOD-123W) surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, MSL level 1, compatible with standard SMT reflow profiles (peak 260 °C). Cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to protected signal line (e.g., USB D+); conducts during positive transients when cathode is biased higher. |
| Cathode | Ground-reference terminal | Connected to system ground or low-impedance return path; defines unidirectional clamping direction and ESD current sink path. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping voltage | 12.9 V max at 15.5 A ensures downstream 3.3 V/5 V ICs remain within absolute maximum ratings during ESD. |
| "Low Noise" fast response | <1 ns turn-on time prevents transient energy from propagating past the diode into sensitive circuitry. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment, body control, and ADAS sensor interfaces. |
| Reflow/wave solder compatible | Rated for peak reflow temperature up to 260 °C, supporting high-volume automated PCB assembly without reliability risk. |
| Low profile DO-219AB package | 1.08 mm height enables use in space-constrained modules such as telematics units and compact sensor nodes. |
Applications
| USB 2.0 Interface Protection | Automotive Infotainment Display Port |
|---|---|
Use Scenario: Protecting D+ and D- lines of USB 2.0 host/device ports against ESD during cable insertion or handling. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed directly at connector entry point. Use Value: 773 pF capacitance avoids signal integrity degradation at 480 Mbps; 12.9 V clamping prevents damage to USB PHY transceivers. |
Use Scenario: Shielding LVDS or FPD-Link II video data lanes in center-stack displays from ESD in vehicle cabins. IC Role / Device Role / Timing Role: Point-of-entry ESD clamp on differential video pairs, referenced to chassis ground. Use Value: ±30 kV contact discharge rating meets ISO 10605 requirements; AEC-Q101 qualification ensures long-term reliability in thermal cycling environments. |
| Industrial CAN FD Node Protection | Smart Sensor Signal Conditioning |
Use Scenario: Safeguarding CAN FD transceiver I/O pins (CANH/CANL) in factory automation controllers exposed to maintenance personnel ESD. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two SMF7V5A-HM3-18 devices (anode-to-anode configuration). Use Value: 12.9 V clamping preserves CAN FD common-mode voltage window (−2 V to +7 V); low leakage avoids bus bias shift. |
Use Scenario: Protecting analog output (4–20 mA) or digital I²C/SPI lines of pressure/temperature sensors mounted on machinery. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA) ESD shunt on sensor output traces, minimizing impact on precision measurement accuracy. Use Value: 7.5 V VRWM aligns with 5 V sensor supply rails; 175 °C max junction temperature supports operation near hot engine blocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A-E3/57T | DO-214AC (SMA) package; 7.5 V VRWM; 13.4 V VC at 14.1 A; 1000 pF capacitance. | Higher capacitance limits use to lower-speed interfaces (e.g., RS-485); larger footprint requires PCB redesign. | Select when legacy SMA layout exists and USB 2.0 speed is not required. |
| TPD2E001DRYR | 2-channel, 0.85 pF per channel, 5 V VRWM, SC-70 package; integrated dual-line protection. | Designed for ultra-high-speed data (USB 3.0, HDMI); not rated for ±30 kV ESD or AEC-Q101. | Choose for space-constrained, multi-line digital interfaces where ESD severity is ≤±15 kV. |
Compared with SMAJ7.5A-E3/57T and TPD2E001DRYR, SMF7V5A-HM3-18 uniquely balances automotive qualification, 773 pF capacitance suitable for USB 2.0, and DO-219AB's low-profile form factor - making it optimal for new designs targeting cost-effective, high-reliability ESD protection in compact automotive and industrial modules.
Availability
SMF7V5A-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, and USB 2.0 peripheral interfaces requiring stable component supply and long-term production continuity.
Supply support for SMF7V5A-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 board-level ESD protection in space- and performance-critical applications, with design emphasis on low clamping, fast response, and AEC-Q101 compliance for automotive electronics.
FAQ
What is the maximum clamping voltage of the SMF7V5A-HM3-18 under standard ESD test conditions?
The SMF7V5A-HM3-18 has a maximum clamping voltage (VC) of 12.9 V when subjected to a 10/1000 μs peak pulse current of 15.5 A. This value is measured per IEC 61000-4-5 and ensures protected ICs remain within safe operating limits during surge events. The SMF7V5A-HM3-18 achieves this with low incremental surge resistance and optimized junction design.
Is the SMF7V5A-HM3-18 suitable for automotive applications?
Yes, the SMF7V5A-HM3-18 is AEC-Q101 qualified and rated for operating temperatures from -65 °C to +175 °C, making it suitable for under-hood and cabin-mounted automotive electronics. Its ±30 kV IEC 61000-4-2 ESD rating and DO-219AB package robustness meet stringent automotive EMC and reliability requirements. The SMF7V5A-HM3-18 is commonly used in infotainment, body control, and ADAS sensor interfaces.
What is the capacitance of the SMF7V5A-HM3-18 and how does it affect high-speed signal lines?
The SMF7V5A-HM3-18 has a typical capacitance of 773 pF at 0 V and 1 MHz. This value is low enough to avoid significant signal rise-time degradation on USB 2.0 (480 Mbps) and CAN FD lines, while still providing effective ESD energy absorption. Higher capacitance would attenuate high-frequency harmonics and increase bit error rates - the SMF7V5A-HM3-18 strikes a verified balance between protection efficacy and signal fidelity.
Does the SMF7V5A-HM3-18 require special PCB layout considerations?
Yes - to preserve its 12.9 V clamping performance, the SMF7V5A-HM3-18 must be placed as close as possible to the protected connector or IC pin, with short, low-inductance traces to ground. The DO-219AB footprint recommends 1.3 mm × 1.3 mm pads and 2.9 mm pad center spacing. Avoid vias or stubs in the ground path; use solid ground plane beneath the device. These practices ensure the SMF7V5A-HM3-18 delivers specified transient suppression without impedance-related voltage overshoot.
How does the SMF7V5A-HM3-18 compare to TVS diodes with higher peak pulse power ratings?
The SMF7V5A-HM3-18 offers 200 W peak pulse power (10/1000 μs) - sufficient for IEC 61000-4-2 ESD and most IEC 61000-4-5 surge events in end-equipment interfaces. While higher-power TVS devices (e.g., 600 W+) target AC mains or Ethernet ports, their larger packages and higher capacitance make them unsuitable for high-speed data lines. The SMF7V5A-HM3-18 prioritizes low capacitance and fast response over raw power, matching the needs of signal-line protection where the SMF7V5A-HM3-18 excels.
SMF7V5A-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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 15.5A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 773pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF7V5A-HM3-18 FAQ
1.How can I place an order for SMF7V5A-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF7V5A-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 SMF7V5A-HM3-18 reliable?
The price and inventory of SMF7V5A-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 SMF7V5A-HM3-18 is usually 5 days.
3.What payment methods are accepted for SMF7V5A-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF7V5A-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF7V5A-HM3-18?
SMF7V5A-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF7V5A-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 SMF7V5A-HM3-18?
For technical support, including SMF7V5A-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF7V5A-HM3-18 requirements.
6.How does Aetrix verify that SMF7V5A-HM3-18 is sourced from the original manufacturer or authorized distributors?
All SMF7V5A-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 SMF7V5A-HM3-18 meets industry standards.
7.What is the process for return or replacement of SMF7V5A-HM3-18?
All SMF7V5A-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF7V5A-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 SMF7V5A-HM3-18 part is unused and in its original packaging.
Return procedure for SMF7V5A-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF7V5A-HM3-18 Tags
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