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Vishay General Semiconductor - Diodes Division SMF30A-E3-08
- Part No.:
- SMF30A-E3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF30A-E3-08.pdf
- Description:
- TVS DIODE 30VWM 48.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:21,289
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Product details
Overview
SMF30A-E3-08 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 and power rails. It features a 30 V standoff voltage (VRWM), 48.4 V maximum clamping voltage at 4.1 A peak pulse current (IPPM), and ±30 kV IEC 61000-4-2 ESD immunity - deployed in automotive infotainment interfaces and USB 2.0 port protection.
For engineers reviewing the SMF30A-E3-08 datasheet, SMF30A-E3-08 pinout, SMF30A-E3-08 application, or SMF30A-E3-08 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low capacitance (207 pF at 0 V), AEC-Q101 qualification status, and SOD-123W-compatible footprint compatibility with automated assembly processes.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche breakdown to clamp transients above its reverse standoff voltage. Its low incremental surge resistance ensures rapid response (<1 ns) and minimal voltage overshoot during ESD events per IEC 61000-4-2.
The SMF30A-E3-08 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and supports continuous operation from –65 °C to +175 °C. It meets AEC-Q101 stress test requirements including HBM >8 kV and IEC 61000-4-2 ±30 kV contact/air discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 30 V - defines maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 33.3–36.9 V at 1 mA - ensures reliable turn-on margin above VRWM for robust overvoltage margin |
| Clamping Voltage (VC) | 48.4 V at IPPM = 4.1 A (10/1000 μs) - limits downstream IC voltage stress during surge events |
| Capacitance (CD) | 207 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) signal integrity without excessive rise-time degradation |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 industrial and automotive ESD immunity requirements |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 × 1.9 × 1.08 mm low-profile outline enabling high-density PCB layout |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock testing |
Pinout & Package
SMF30A-E3-08 uses the DO-219AB (SMF) package: molded, surface-mount, cathode-banded, single-diode configuration. Dimensions: 3.9 mm length × 1.9 mm width × 1.08 mm height. Compatible with standard SOD-123W footprint and reflow soldering profiles (peak ≤260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to protected signal or power line; conducts surge current toward ground during clamping |
| Cathode | Ground-reference terminal | Connected to system ground plane; establishes reference for reverse-biased clamping operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-clamp architecture | 48.4 V VC at 4.1 A enables safe protection of 3.3 V and 5 V logic interfaces without overstressing downstream ICs |
| "Low Noise" fast response | <1 ns response time minimizes voltage overshoot during ESD transients, preserving signal integrity |
| AEC-Q101 qualification | Validated for automotive under-hood and infotainment applications requiring extended temperature and lifetime reliability |
| Wave/reflow solderable | Compatible with IPC-J-STD-020 MSL level 1 handling and standard lead-free reflow profiles (260 °C peak) |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meets safety standards for enclosed automotive and industrial enclosures |
Applications
| Automotive Infotainment Display Interface | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting LVDS or FPD-Link III video data lines between head unit and display panel against ESD from user touch or cable coupling. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed inline on differential signal pairs, referenced to chassis ground. Use Value: 207 pF capacitance avoids skew or jitter in 1+ Gbps video streams; ±30 kV ESD rating prevents latch-up in display timing controllers. |
Use Scenario: Safeguarding D+ and D− pins of USB 2.0 host/device connectors against electrostatic discharge during hot-plug events. IC Role / Device Role / Timing Role: Single-channel unidirectional clamp per signal line, grounded to local digital ground. Use Value: 48.4 V clamping voltage stays below USB PHY absolute max ratings (5.25 V); low capacitance preserves eye diagram integrity at 480 Mbps. |
| Industrial CAN Bus Node Protection | DC Power Rail Surge Suppression |
Use Scenario: Shielding CAN_H/CAN_L transceivers from ESD and load-dump induced transients in factory automation nodes. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two SMF30A-E3-08 devices (anode-to-anode) across differential bus lines. Use Value: 30 V VRWM aligns with 24 V nominal CAN systems; 200 W 10/1000 μs rating handles repetitive EFT bursts without degradation. |
Use Scenario: Clamping voltage spikes on 24 V DC input rails caused by inductive switching or lightning-induced surges in PLC power supplies. IC Role / Device Role / Timing Role: Unidirectional TVS connected between rail and ground, sized for sustained 24 V operation and transient energy absorption. Use Value: 175 °C max junction temperature supports operation in sealed enclosures; 1000 W 8/20 μs rating handles IEC 61000-4-5 surge waveforms. |
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 (49.9 V), larger SMA (DO-214AC) package (4.5 × 2.7 × 2.2 mm), same VRWM and AEC-Q101 qualification | Less suitable for ultra-thin modules due to 2.2 mm height; better thermal dissipation for higher average power | Select when board space allows larger footprint and higher thermal mass is needed for repeated surge events |
| TPSMF30A | Same DO-219AB package and electrical specs, but offered by STMicroelectronics with identical 30 V VRWM, 48.4 V VC, and ±30 kV ESD rating | No functional or mechanical difference; dual-sourcing option with alternate supply chain and logistics terms | Choose for second-source assurance while maintaining identical PCB layout and performance behavior |
Compared with SMAJ30A-E3/57T and TPSMF30A, the SMF30A-E3-08 offers identical clamping and ESD performance in the smallest possible footprint (3.9 × 1.9 mm), making it optimal for space-constrained automotive and portable industrial designs where height clearance is limited to ≤1.1 mm.
Availability
SMF30A-E3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial USB peripherals, and 24 V DC power rail protection requiring stable component supply across multi-year production cycles.
Supply support for SMF30A-E3-08 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 compact, high-performance ESD protection for next-generation automotive and industrial interfaces, emphasizing low capacitance, AEC-Q101 compliance, and SMT manufacturability in ultra-low-profile packages.
FAQ
What is the maximum clamping voltage of the SMF30A-E3-08 under standard surge conditions?
The SMF30A-E3-08 has a maximum clamping voltage (VC) of 48.4 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 4.1 A. This value is measured per IEC 61000-4-5 test conditions and ensures downstream circuitry remains within safe operating limits during transient events. The SMF30A-E3-08 maintains this clamping performance across its full operating temperature range of –65 °C to +175 °C.
Is the SMF30A-E3-08 qualified to AEC-Q101 for automotive use?
Yes, the SMF30A-E3-08 is AEC-Q101 qualified, having passed all required stress tests including human body model ESD (>8 kV), temperature cycling, high-temperature reverse bias, and mechanical shock. This qualification confirms its suitability for automotive applications such as infotainment displays, body control modules, and sensor interfaces where reliability under harsh environmental conditions is mandatory. The SMF30A-E3-08 carries this qualification in its standard production lot release.
What is the capacitance of the SMF30A-E3-08 and how does it affect high-speed signal lines?
The SMF30A-E3-08 exhibits a typical capacitance of 207 pF at 0 V and 1 MHz, which is optimized for high-speed interfaces like USB 2.0 (480 Mbps) and LVDS video links. This value introduces minimal signal distortion or rise-time degradation when placed on differential pairs with proper layout practices. The SMF30A-E3-08's capacitance remains stable across bias voltages up to VRWM, ensuring consistent performance during normal operation and transient suppression.
Can the SMF30A-E3-08 be used for bidirectional protection, and if so, how?
The SMF30A-E3-08 is a unidirectional TVS diode, but it can be configured for bidirectional protection by connecting two units anode-to-anode, with cathodes tied to opposite sides of the protected line pair - a standard method for safeguarding differential buses like CAN or RS-485. In this arrangement, each SMF30A-E3-08 clamps transients in one polarity direction. The SMF30A-E3-08's low leakage (<0.1 μA at VRWM) ensures no DC loading on the bus during normal operation.
What package type does the SMF30A-E3-08 use, and is it compatible with automated SMT assembly?
The SMF30A-E3-08 uses the DO-219AB (SMF) package - a low-profile, surface-mount outline measuring 3.9 mm × 1.9 mm × 1.08 mm - and is fully compatible with automated SMT assembly, including wave and lead-free reflow soldering (IPC-J-STD-020 MSL level 1, peak temperature ≤260 °C). Its cathode band and standardized tape-and-reel packaging (E3-08 = 3K per 7″ reel) enable seamless integration into high-volume manufacturing lines. The SMF30A-E3-08 footprint matches SOD-123W land patterns for drop-in placement flexibility.
SMF30A-E3-08 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:
- General Purpose
- Capacitance @ Frequency:
- 207pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF30A-E3-08 FAQ
1.How can I place an order for SMF30A-E3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF30A-E3-08 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-E3-08 reliable?
The price and inventory of SMF30A-E3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF30A-E3-08 is usually 5 days.
3.What payment methods are accepted for SMF30A-E3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF30A-E3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF30A-E3-08?
SMF30A-E3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF30A-E3-08 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-E3-08?
For technical support, including SMF30A-E3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF30A-E3-08 requirements.
6.How does Aetrix verify that SMF30A-E3-08 is sourced from the original manufacturer or authorized distributors?
All SMF30A-E3-08 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-E3-08 meets industry standards.
7.What is the process for return or replacement of SMF30A-E3-08?
All SMF30A-E3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF30A-E3-08, 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-E3-08 part is unused and in its original packaging.
Return procedure for SMF30A-E3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF30A-E3-08 Tags
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