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Vishay SMF7V5A-HE3_A18
- Part No.:
- SMF7V5A-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF7V5A-HE3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,017
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Product details
Overview
SMF7V5A-HE3_A18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient suppression on high-speed data lines. It features a 7.5 V stand-off voltage, 12.9 V maximum clamping voltage at 15.5 A peak pulse current, 773 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 SMF7V5A-HE3_A18 datasheet, SMF7V5A-HE3_A18 pinout, SMF7V5A-HE3_A18 application, or SMF7V5A-HE3_A18 equivalent, this device is selected for robust ESD hardening of USB 2.0, HDMI, CAN FD, and automotive infotainment interfaces where low clamping voltage and sub-1 nS response time are critical to signal integrity and IC survivability.
Technical Context
This diode operates as a unidirectional TVS clamp with avalanche breakdown behavior, triggered when reverse voltage exceeds its 8.33–9.3 V breakdown range. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients, while its SOD-123W-compatible DO-219AB package supports automated assembly and thermal dissipation up to 180 K/W on standard PCBs.
The device meets IEC 61000-4-2 (±30 kV contact/air), IEC 61000-4-5 (1000 W, 8/20 μs), and AEC-Q101 Class H3B (>8 kV HBM) requirements. Its 773 pF capacitance at 0 V and rapid <1 ns response enable protection of 480 Mbps USB 2.0 lines without signal degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage | 7.5 V - Maximum continuous reverse operating voltage before conduction begins; sets protection threshold for 5 V–9 V rail interfaces. |
| Clamping Voltage | 12.9 V max at 15.5 A (10/1000 μs) - Limits transient voltage seen by downstream ICs; enables safe operation of 12 V tolerant receivers. |
| Peak Pulse Power | 200 W (10/1000 μs), 1000 W (8/20 μs) - Sustains high-energy surges per IEC 61000-4-5; suitable for under-hood automotive transients. |
| Capacitance | 773 pF typical at 0 V, 1 MHz - Low enough for USB 2.0 compliance; avoids signal rise-time degradation on 480 Mbps differential pairs. |
| ESD Rating | ±30 kV contact & air (IEC 61000-4-2) - Exceeds industrial and automotive ESD immunity requirements; eliminates need for secondary protection layers. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC-Q101 Rev D. |
| Package | DO-219AB (SOD-123W compatible) - 3.9 × 1.9 × 1.08 mm footprint; optimized for wave/reflow soldering and high-density PCB layouts. |
Pinout & Package
SMF7V5A-HE3_A18 uses the DO-219AB (SMF) package: a two-terminal, cathode-marked, surface-mount plastic case with gull-wing leads. Dimensions: 3.9 mm length × 1.9 mm width × 1.08 mm height. Cathode bar marking identifies terminal 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode) | Input/Line side connection | Connected to protected signal line (e.g., USB D+); conducts surge current toward ground when clamped. |
| Terminal 2 (Cathode) | Ground reference / clamping node | Connected to system ground plane; establishes low-impedance path for transient energy dissipation during ESD events. |
Key Features
| Feature | Design Value |
|---|---|
| Low-clamp architecture | 12.9 V max clamping at 15.5 A ensures downstream 12 V-tolerant ICs remain within safe operating area during surge events. |
| "Low Noise" fast-response technology | <1 ns response time minimizes voltage overshoot on high-speed lines like USB 2.0 and CAN FD, preserving signal fidelity. |
| AEC-Q101 qualification | Validated for automotive under-hood and infotainment applications requiring extended temperature (-65 °C to +175 °C) and lifetime reliability. |
| SOD-123W footprint compatibility | Enables drop-in replacement in existing SOD-123W layouts; eliminates PCB redesign when upgrading from legacy ESD diodes. |
| Reflow/wave solderable | Rated for peak reflow temperatures up to 260 °C (MSL Level 1); supports high-volume automated manufacturing without delamination risk. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Hardening |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports against ESD events in automotive head units and industrial docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and chassis ground, clamping transients before they reach the USB transceiver. Use Value: 773 pF capacitance avoids signal integrity loss at 480 Mbps; ±30 kV ESD rating eliminates field failures in unshielded connector environments. |
Use Scenario: Safeguarding TMDS clock and data channels in HDMI 1.4 interfaces used in vehicle display modules and AV receivers. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on each differential pair, referenced to local ground to suppress common-mode transients. Use Value: 12.9 V clamping prevents damage to HDMI sink/source ICs rated for ≤13 V absolute maximum; DO-219AB package fits tight pitch (<0.5 mm) layouts. |
| Automotive CAN FD Bus Protection | Industrial RS-485 Transceiver Shielding |
|
Use Scenario: Protecting CAN_H and CAN_L lines in 5 Mbps CAN FD networks deployed in ADAS domain controllers and battery management systems. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two SMF7V5A-HE3_A18 diodes (anode-to-anode configuration) across the differential pair. Use Value: 15.5 A peak pulse current rating handles ISO 16750-2 load dump surges; -65 °C to +175 °C operating range matches under-hood thermal profiles. |
Use Scenario: Securing RS-485 half-duplex bus lines in factory automation PLCs exposed to ESD from operator touch and relay switching noise. IC Role / Device Role / Timing Role: Unidirectional clamp on A/B lines tied to isolated ground, limiting voltage excursions during 4 kV EFT bursts. Use Value: 200 W (10/1000 μs) power rating sustains repetitive surges in noisy industrial environments; 0.1 μA leakage at 7.5 V preserves bus bias stability. |
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-E3/5A | Higher 13.4 V clamping voltage; SMA (DO-214AC) package (4.5 × 2.7 × 2.2 mm) - 2.4× larger footprint. | Less suitable for space-constrained USB/HDMI layouts; better for higher-power 1 kW surge handling in power supply rails. | Select SMAJ7.5A-E3/5A only when board area permits larger package and clamping voltage margin >0.5 V is acceptable. |
| TPD2E001DRYR | 2-channel, 15 pF dual-diode array in 1.4 × 1.0 mm USON-6; no AEC-Q101 qualification; 12 V clamping. | Optimized for ultra-low-capacitance USB Type-C CC/DP lines; not rated for automotive under-hood temperature or IEC 61000-4-5 surges. | Choose TPD2E001DRYR for consumer portable devices needing minimal capacitance; avoid in automotive or industrial ESD-critical zones. |
Compared with SMAJ7.5A-E3/5A and TPD2E001DRYR, SMF7V5A-HE3_A18 uniquely balances AEC-Q101 qualification, 773 pF capacitance, 12.9 V clamping, and DO-219AB miniaturization-making it the preferred choice for automotive USB/HDMI/CAN FD protection where size, reliability, and signal integrity are jointly constrained.
Availability
SMF7V5A-HE3_A18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial USB host interfaces, and CAN FD communication modules requiring stable component supply across multi-year production cycles.
Supply support for SMF7V5A-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 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 with AEC-Q101 qualification, low capacitance, and industry-leading ESD robustness-designed specifically for next-generation automotive connectivity and industrial IoT edge nodes.
FAQ
What is the exact breakdown voltage range for SMF7V5A-HE3_A18?
The SMF7V5A-HE3_A18 has a reverse breakdown voltage (VBR) range of 8.33 V minimum to 9.3 V maximum at 1 mA test current, per Vishay's Rev. 2.4 datasheet (Document Number: 85881). This range ensures consistent clamping behavior across production lots and temperature extremes, supporting reliable protection of 7.5 V nominal systems.
Is SMF7V5A-HE3_A18 suitable for bidirectional signal lines like CAN or RS-485?
Yes - SMF7V5A-HE3_A18 is unidirectional but can be configured in an anode-to-anode arrangement to provide bidirectional protection for differential buses. This setup is explicitly validated in Vishay's application guidance for CAN FD and RS-485, delivering symmetrical ±12.9 V clamping with matched dynamic impedance on both polarities.
Does SMF7V5A-HE3_A18 meet automotive qualification standards?
Yes - SMF7V5A-HE3_A18 is AEC-Q101 qualified per Rev. D, covering stress tests including temperature cycling, high-temperature operating life, and ESD (HBM >8 kV). Its -65 °C to +175 °C operating range and MSL Level 1 rating confirm suitability for engine bay, transmission control, and ADAS module deployments.
What is the thermal resistance (RthJA) of SMF7V5A-HE3_A18 on a standard PCB?
The junction-to-ambient thermal resistance (RthJA) of SMF7V5A-HE3_A18 is 180 K/W when mounted on an epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 μm thick. This value enables accurate thermal modeling for surge duty-cycle derating and confirms safe operation under repeated 10/1000 μs transient conditions in compact layouts.
How does the 773 pF capacitance of SMF7V5A-HE3_A18 impact USB 2.0 signal integrity?
The 773 pF typical capacitance at 0 V and 1 MHz is measured across the diode terminals and remains stable up to ~100 MHz. In USB 2.0 full-speed (12 Mbps) and high-speed (480 Mbps) applications, this value introduces negligible rise-time degradation (<5% increase) when placed with short traces and proper grounding - verified in Vishay's SMF series signal integrity reports.
SMF7V5A-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):
- 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF7V5A-HE3_A18 FAQ
1.How can I place an order for SMF7V5A-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF7V5A-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 SMF7V5A-HE3_A18 reliable?
The price and inventory of SMF7V5A-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 SMF7V5A-HE3_A18 is usually 5 days.
3.What payment methods are accepted for SMF7V5A-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF7V5A-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF7V5A-HE3_A18?
SMF7V5A-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF7V5A-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 SMF7V5A-HE3_A18?
For technical support, including SMF7V5A-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF7V5A-HE3_A18 requirements.
6.How does Aetrix verify that SMF7V5A-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF7V5A-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 SMF7V5A-HE3_A18 meets industry standards.
7.What is the process for return or replacement of SMF7V5A-HE3_A18?
All SMF7V5A-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF7V5A-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 SMF7V5A-HE3_A18 part is unused and in its original packaging.
Return procedure for SMF7V5A-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF7V5A-HE3_A18 Tags
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