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Vishay General Semiconductor - Diodes Division SMF30A-HE3-08
- Part No.:
- SMF30A-HE3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF30A-HE3-08.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:23,972
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Product details
Overview
SMF30A-HE3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for transient voltage suppression on data and signal lines. It features a 30 V stand-off voltage (VRWM), 48.4 V maximum clamping voltage at 4.1 A peak pulse current, 200 W peak pulse power (10/1000 μs), ±30 kV IEC 61000-4-2 ESD immunity, and 207 pF typical capacitance at 0 V - ideal for protecting USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF30A-HE3-08 datasheet, SMF30A-HE3-08 pinout, SMF30A-HE3-08 application, or SMF30A-HE3-08 equivalent, this device delivers verified AEC-Q101 qualification, low-clamp performance with fast response time, and compatibility with automated SMT assembly including reflow up to 260 °C.
Technical Context
This diode operates as a unidirectional TVS element with a single protection path, leveraging silicon avalanche breakdown to clamp transients above its reverse standoff voltage. Its low incremental surge resistance ensures minimal voltage overshoot during fast ESD events, while the "Low Noise" technology enables sub-nanosecond response to 0.7–1 ns rise-time discharges per IEC 61000-4-2.
The device is rated for continuous operation from –65 °C to +175 °C, with thermal resistance RthJA = 180 K/W on standard 3 mm × 3 mm Cu pads. It meets AEC-Q101 stress test requirements including HBM > 8 kV and supports wave/reflow soldering per J-STD-020 MSL level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe interface voltage margin. |
| Clamping Voltage (VC) | 48.4 V at IPPM = 4.1 A (10/1000 μs) - limits transient voltage seen by downstream ICs during surge events. |
| Peak Pulse Power | 200 W (10/1000 μs) - sustains short-duration surges without degradation; suitable for IEC 61000-4-5 Level 3. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity requirements. |
| Capacitance | 207 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) and RS-485 signal integrity; avoids data distortion. |
| Reverse Leakage | 0.1 μA at VRWM = 30 V - negligible DC loading on protected lines; preserves signal bias and power efficiency. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HBM, and mechanical shock testing. |
Pinout & Package
SMF30A-HE3-08 uses the DO-219AB (SOD-123W-compatible) surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, cathode-bar marked, MSL level 1, reflow-compatible up to 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-marked end) | Input/line side connection | Connected to signal/data line requiring protection; carries surge current into the diode junction. |
| Cathode (bar-marked end) | Ground reference terminal | Must be tied to low-impedance system ground or chassis return to enable effective clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables robust protection against repetitive surges in industrial control and automotive infotainment systems. |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for secondary ESD stages in handheld and connector-facing designs. |
| 207 pF capacitance at 0 V | Maintains signal integrity for high-speed interfaces up to 480 Mbps without added jitter or attenuation. |
| AEC-Q101 qualified | Validated for under-hood and ADAS applications where long-term reliability under thermal cycling is critical. |
| DO-219AB package | Compatible with SOD-123W footprint - allows drop-in replacement in existing layouts using standard pick-and-place equipment. |
Applications
| USB 2.0 Interface Protection | HDMI DDC Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 data lines (D+/D−) against ESD events during hot-plug insertion in portable medical devices. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between data line and ground to clamp transients before they reach the USB transceiver. Use Value: 207 pF capacitance avoids signal rise/fall time degradation; 48.4 V clamping prevents damage to 3.3 V tolerant PHY inputs. |
Use Scenario: Safeguarding HDMI Display Data Channel (DDC) lines (SCL/SDA) from ESD in commercial digital signage controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS suppressing fast transients on 5 V open-drain I²C bus lines without loading pull-up resistors. Use Value: 0.1 μA leakage at 30 V ensures no impact on I²C timing or logic thresholds; ±30 kV rating covers field-repair scenarios. |
| Automotive Sensor Signal Lines | Industrial RS-485 Transceivers |
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to ISO 10605 pulses. IC Role / Device Role / Timing Role: Low-capacitance TVS on 0–5 V analog outputs to prevent latch-up or parametric shift in ADC front-ends. Use Value: 175 °C max junction temperature and AEC-Q101 qualification ensure stable operation across under-hood thermal profiles. |
Use Scenario: Guarding RS-485 differential pairs (A/B) against lightning-induced surges in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional protection implemented via two SMF30A-HE3-08 diodes (anode-to-ground, cathode-to-ground) per line. Use Value: 200 W pulse rating handles 10/1000 μs surges per IEC 61000-4-5; DO-219AB package fits tight PCB spacing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T | Higher clamping voltage (53.3 V at 4.3 A); SMA package (larger footprint, higher inductance). | Less suitable for high-speed interfaces due to ~350 pF capacitance and slower response. | Prefer SMF30A-HE3-08 when board space, signal integrity, or ESD robustness > 25 kV is required. |
| TPD2E001DRYR | 2-channel, 15 pF dual-diode array; lower power rating (120 W), not AEC-Q101 qualified. | Targeted at consumer USB ports; lacks automotive qualification and high-energy surge capability. | Choose SMF30A-HE3-08 for single-line, high-reliability, high-power transient suppression in harsh environments. |
Compared with SMAJ30A-E3/57T and TPD2E001DRYR, SMF30A-HE3-08 offers superior ESD margin (±30 kV), lower capacitance for signal fidelity, and AEC-Q101 validation - making it the preferred choice for automotive and industrial signal-line protection where both reliability and speed matter.
Availability
SMF30A-HE3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive sensor signal conditioning, and industrial RS-485 communication systems requiring stable component supply and long-term lifecycle support.
Supply support for SMF30A-HE3-08 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, low-capacitance ESD protection for signal integrity-critical applications - engineered specifically for USB, HDMI, and automotive sensor interfaces demanding AEC-Q101 compliance and robust transient suppression.
FAQ
What is the clamping voltage of SMF30A-HE3-08 at its rated peak pulse current?
The SMF30A-HE3-08 has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current of 4.1 A under the 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Rev. 2.4, July 2023) and ensures downstream ICs see limited overvoltage during transient events. The clamping behavior is repeatable and stable across its full operating temperature range.
Is SMF30A-HE3-08 suitable for automotive applications?
Yes, SMF30A-HE3-08 is AEC-Q101 qualified and explicitly rated for automotive use. It passes human body model (HBM) testing > 8 kV and operates reliably from –65 °C to +175 °C. Its DO-219AB package, low leakage (0.1 μA), and ±30 kV ESD immunity make it appropriate for engine control units, ADAS sensor interfaces, and infotainment data lines where environmental ruggedness is mandatory.
What package type does SMF30A-HE3-08 use, and is it compatible with standard SMT processes?
SMF30A-HE3-08 uses the DO-219AB (also referenced as SOD-123W-compatible) surface-mount package. It is fully compatible with standard reflow soldering per J-STD-020, supporting peak temperatures up to 260 °C. The package is MSL level 1, requires no dry-pack handling, and fits standard SOD-123 footprints - enabling seamless integration into high-volume automated assembly lines.
How does the capacitance of SMF30A-HE3-08 affect high-speed signal lines?
SMF30A-HE3-08 exhibits 207 pF typical capacitance at 0 V and 1 MHz, which is optimized for signal integrity in USB 2.0 (480 Mbps) and RS-485 applications. This value introduces negligible impedance mismatch or rise-time degradation on properly terminated lines. For higher-speed interfaces like USB 3.0 or HDMI 2.0, lower-capacitance alternatives would be required - but SMF30A-HE3-08 remains ideal for cost-sensitive, robust protection where bandwidth ≤ 200 MHz is sufficient.
Does SMF30A-HE3-08 support bidirectional transient protection?
No, SMF30A-HE3-08 is a unidirectional TVS diode, intended for circuits with defined polarity such as DC-powered signal lines referenced to ground. For bidirectional protection (e.g., AC-coupled or floating lines), two SMF30A-HE3-08 devices can be used in series opposition (anode-to-anode or cathode-to-cathode), or a dedicated bidirectional part like SMBJ30CA should be selected. The datasheet confirms single-path, unidirectional operation only.
SMF30A-HE3-08 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 207pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF30A-HE3-08 FAQ
1.How can I place an order for SMF30A-HE3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF30A-HE3-08 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 SMF30A-HE3-08 reliable?
The price and inventory of SMF30A-HE3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF30A-HE3-08 is usually 5 days.
3.What payment methods are accepted for SMF30A-HE3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF30A-HE3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF30A-HE3-08?
SMF30A-HE3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF30A-HE3-08 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 SMF30A-HE3-08?
For technical support, including SMF30A-HE3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF30A-HE3-08 requirements.
6.How does Aetrix verify that SMF30A-HE3-08 is sourced from the original manufacturer or authorized distributors?
All SMF30A-HE3-08 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 SMF30A-HE3-08 meets industry standards.
7.What is the process for return or replacement of SMF30A-HE3-08?
All SMF30A-HE3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF30A-HE3-08, 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 SMF30A-HE3-08 part is unused and in its original packaging.
Return procedure for SMF30A-HE3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF30A-HE3-08 Tags
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