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Vishay General Semiconductor - Diodes Division SMF26A-E3-08
- Part No.:
- SMF26A-E3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF26A-E3-08.pdf
- Description:
- TVS DIODE 26VWM 42.1VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:65,044
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Product details
Overview
SMF26A-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. It features a 26 V standoff voltage (VRWM), 42.1 V maximum clamping voltage at 4.8 A peak pulse current, 230 pF typical capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity - ideal for USB 2.0, HDMI, and industrial sensor interface protection.
For engineers reviewing the SMF26A-E3-08 datasheet, SMF26A-E3-08 pinout, SMF26A-E3-08 application, or SMF26A-E3-08 equivalent, key selection criteria include clamping voltage vs. signal integrity trade-offs, capacitance impact on high-frequency rise time, thermal resistance under repeated surge events, and compatibility with SOD-123W footprint layouts.
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 voltage limiting during 10/1000 µs surges, while "Low Noise" technology enables sub-nanosecond response time critical for protecting gigabit-speed interfaces.
The SMF26A-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 qualification for automotive-grade reliability and is compatible with standard reflow soldering profiles up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 26 V - defines maximum continuous operating voltage before clamping begins; sets upper limit for protected line DC bias. |
| Clamping Voltage (VC) | 42.1 V at IPPM = 4.8 A - peak voltage seen by downstream circuit during worst-case 10/1000 µs surge; determines safe margin for IC I/O tolerance. |
| Capacitance (CD) | 230 pF at 0 V, 1 MHz - directly impacts signal integrity on high-speed lines; requires layout compensation for >100 Mbps interfaces. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for consumer and industrial end-equipment. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline enabling dense PCB layouts and automated assembly. |
| Thermal Resistance | RthJA = 180 K/W on 3 mm × 3 mm Cu pads - governs steady-state power dissipation capability and limits repetition rate of surge events. |
| Operating Temp. | –65 °C to +175 °C - supports under-hood automotive, industrial control, and extended-temperature IoT deployments without derating. |
Pinout & Package
SMF26A-E3-08 uses the DO-219AB (SOD-123W-equivalent) surface-mount package with cathode-bar marking. The two-terminal configuration supports unidirectional transient suppression across a single signal line and ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Signal line connection (protected side) | Connected to I/O trace requiring ESD protection; must be routed with minimal inductance to maintain clamping speed. |
| Cathode | Ground reference (cathode bar marked) | Direct low-inductance path to system ground plane required; shared ground with protected IC improves clamping efficiency. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 µs) | Enables robust protection against lightning-induced surges and inductive switching transients in industrial fieldbus nodes. |
| ±30 kV IEC 61000-4-2 ESD immunity | Meets highest ESD immunity class for handheld, panel-mounted, and exposed connector applications without external shielding. |
| 230 pF capacitance at 0 V | Optimized for <150 Mbps digital interfaces (e.g., RS-485, CAN FD physical layer); lower than legacy SMA/SMB TVS diodes. |
| AEC-Q101 qualified | Validated for automotive infotainment, ADAS camera links, and body electronics where component lifetime and failure mode rigor are mandated. |
| Reflow-solderable SOD-123W footprint | Enables drop-in replacement in existing designs using industry-standard pick-and-place and reflow processes without tooling changes. |
Applications
| USB 2.0 Interface Protection | HDMI Data Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable docking stations against user-handling ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between connector and USB transceiver IC to clamp fast-rising ESD pulses before they reach sensitive PHY inputs. Use Value: 230 pF capacitance avoids signal distortion on 480 Mbps data streams; ±30 kV rating eliminates need for secondary board-level shielding. | Use Scenario: Safeguarding TMDS clock and data channels in set-top box HDMI ports exposed to frequent cable insertion/removal. IC Role / Device Role / Timing Role: Standoff-clamp TVS positioned at connector entry point to suppress contact discharge transients while preserving 165 MHz pixel clock integrity. Use Value: 42.1 V clamping voltage provides ≥2.5 V margin over HDMI 1.4 receiver absolute max rating (VDDIO = 3.6 V, VI/O = 4.0 V). |
| Automotive Camera Link Protection | Industrial RS-485 Transceiver Protection |
Use Scenario: Shielding FAKRA or mini-FARAK coaxial video links in rear-view cameras from ESD and load-dump induced transients. IC Role / Device Role / Timing Role: Single-channel unidirectional suppressor on shielded video signal path, mounted adjacent to connector to minimize loop inductance. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle service life; 175 °C junction rating supports under-hood mounting near camera ECUs. | Use Scenario: Guarding RS-485 transceiver I/O pins in factory automation PLC modules subjected to long-cable EFT bursts and ground potential differences. IC Role / Device Role / Timing Role: Bidirectional protection implemented via dual SMF26A-E3-08 devices (anode-to-anode) across differential pair to handle common-mode surges. Use Value: 200 W pulse rating withstands repetitive 10/1000 µs surges per IEC 61000-4-4; low Rsurge maintains differential signal symmetry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57T | Higher 500 pF capacitance; SMA package (4.5 mm × 2.7 mm); 300 W peak power (10/1000 µs) | Less suitable for >100 Mbps interfaces due to higher capacitance; better for lower-speed power-line or AC input protection | Select when board space allows larger footprint and signal bandwidth is ≤10 Mbps. |
| TPD2E007DRYR | 2-channel, 7 pF per line, 5 V VRWM; DSBGA package; integrated ESD + EMI filtering | Designed for ultra-high-speed USB 3.0/PCIe; not rated for 26 V standoff or automotive temp range | Choose only for low-voltage, high-frequency applications where VRWM ≤5.5 V and capacitance <10 pF is mandatory. |
Compared with SMAJ26A-E3/57T and TPD2E007DRYR, the SMF26A-E3-08 delivers optimal balance of 26 V standoff, 230 pF capacitance, and AEC-Q101 qualification - making it the preferred choice for mid-speed industrial and automotive data interfaces where both voltage headroom and signal fidelity matter.
Availability
SMF26A-E3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive camera link safeguarding, and industrial RS-485 transceiver guarding requiring stable component supply across production lifecycles.
Supply support for SMF26A-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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with leadership in power management, signal conditioning, and protection technologies.
The SMF series belongs to Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for high-reliability ESD and surge protection in space-constrained, high-speed electronic systems across automotive, industrial, and computing markets.
FAQ
What is the maximum clamping voltage of the SMF26A-E3-08 under a 10/1000 µs surge?
The SMF26A-E3-08 has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 4.8 A with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with downstream ICs rated for ≤45 V absolute maximum input.
Is the SMF26A-E3-08 suitable for automotive applications?
Yes, the SMF26A-E3-08 is AEC-Q101 qualified and rated for operation from –65 °C to +175 °C, making it suitable for automotive applications including camera links, infotainment interfaces, and body control modules. Its ±30 kV IEC 61000-4-2 ESD rating and robust surge handling meet stringent OEM requirements for in-vehicle electronics exposed to harsh electrical environments.
What does the "E3-08" suffix indicate in SMF26A-E3-08?
The "E3-08" suffix denotes RoHS-compliant, lead-free terminations with tin plating and packaging in a 3,000-piece 7-inch reel using 8 mm tape width (MOQ = 30,000 units). This coding follows Vishay's standardized ordering nomenclature and confirms compliance with environmental regulations and surface-mount assembly compatibility.
How does the 230 pF capacitance of SMF26A-E3-08 affect high-speed signal integrity?
The 230 pF typical capacitance at 0 V and 1 MHz introduces measurable loading on high-speed signals - acceptable for USB 2.0 (480 Mbps) and RS-485 (<20 Mbps), but may degrade eye diagrams in HDMI 1.4 (165 MHz) if not carefully routed. Layout best practices include minimizing trace length between SMF26A-E3-08 and connector, using ground cutouts, and verifying signal integrity via TDR simulation.
Can SMF26A-E3-08 be used for bidirectional protection?
No, the SMF26A-E3-08 is a unidirectional TVS diode optimized for clamping positive transients relative to ground. For bidirectional protection (e.g., AC-coupled lines or symmetric surges), two SMF26A-E3-08 devices can be connected anode-to-anode, or a dedicated bidirectional part like SMBJ26A should be selected - as confirmed by Vishay's application guidance for differential bus protection.
SMF26A-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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 4.8A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 230pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF26A-E3-08 FAQ
1.How can I place an order for SMF26A-E3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF26A-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 SMF26A-E3-08 reliable?
The price and inventory of SMF26A-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 SMF26A-E3-08 is usually 5 days.
3.What payment methods are accepted for SMF26A-E3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF26A-E3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF26A-E3-08?
SMF26A-E3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF26A-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 SMF26A-E3-08?
For technical support, including SMF26A-E3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF26A-E3-08 requirements.
6.How does Aetrix verify that SMF26A-E3-08 is sourced from the original manufacturer or authorized distributors?
All SMF26A-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 SMF26A-E3-08 meets industry standards.
7.What is the process for return or replacement of SMF26A-E3-08?
All SMF26A-E3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF26A-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 SMF26A-E3-08 part is unused and in its original packaging.
Return procedure for SMF26A-E3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF26A-E3-08 Tags
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