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Vishay General Semiconductor - Diodes Division SMF26A-HE3-08
- Part No.:
- SMF26A-HE3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF26A-HE3-08.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,696
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Product details
Overview
SMF26A-HE3-08 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 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 - enabling robust protection in USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF26A-HE3-08 datasheet, SMF26A-HE3-08 pinout, SMF26A-HE3-08 application, or SMF26A-HE3-08 equivalent, this device is selected for high-reliability ESD hardening of 24–28 V rail-sensitive signal paths where low clamping voltage, sub-1 ns response time, and AEC-Q101 qualification are required.
Technical Context
This diode operates as a single-channel unidirectional TVS, leveraging silicon avalanche breakdown to clamp transients above its reverse standoff voltage. Its DO-219AB package enables compact PCB layout with MSL level 1 moisture sensitivity and 260 °C reflow compatibility.
The device delivers 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and maintains < 0.1 μA leakage at VRWM - critical for preserving signal integrity in low-power analog and digital interfaces while meeting automotive-grade reliability per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 26 V - defines maximum continuous operating voltage before clamping begins; matches 24 V system rails with margin. |
| Clamping Voltage (VC) | 42.1 V max at 4.8 A - limits transient voltage seen by downstream ICs during 10/1000 μs surge events. |
| Peak Pulse Current (IPPM) | 4.8 A (10/1000 μs) - supports IEC 61000-4-5 Level 3 surge immunity in protected circuits. |
| Capacitance (CD) | 230 pF at 0 V, 1 MHz - suitable for USB 2.0 (480 Mbps) and CAN FD interfaces without signal distortion. |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2) - exceeds industrial and automotive ESD test requirements. |
| Operating Temp Range | −65 °C to +175 °C - enables deployment in under-hood automotive and industrial environments. |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HBM >8 kV. |
Pinout & Package
SMF26A-HE3-08 uses the DO-219AB (SMF) package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, cathode-bar marked, SOD-123W-compatible outline with MSL level 1 rating and 260 °C reflow capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protection path | Connected to protected line (e.g., USB D+); conducts during negative transients. |
| Cathode | Output side / ground reference | Connected to system ground or low-impedance return; defines unidirectional clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping voltage | 42.1 V max ensures downstream 3.3 V/5 V logic remains within safe absolute maximum ratings during surges. |
| "Low Noise" fast response | Sub-1 ns turn-on time minimizes voltage overshoot during ESD events, preserving signal fidelity. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, mechanical shock, and HBM ESD stress. |
| Wave/reflow solderable | Compatible with standard SMT processes including lead-free reflow up to 260 °C peak temperature. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets flammability safety requirements for enclosed systems. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+/D− differential pairs in portable USB peripherals against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between data line and chassis ground to shunt ESD energy before it reaches the USB transceiver. Use Value: 230 pF capacitance avoids signal rise-time degradation at 480 Mbps, while ±30 kV ESD rating prevents latch-up or damage in handheld devices. |
Use Scenario: Safeguarding TMDS clock and data channels in HDMI source/sink devices exposed to user-handling ESD. IC Role / Device Role / Timing Role: Standoff-rated clamping device on each TMDS pair, referenced to shield ground to suppress common-mode transients. Use Value: 26 V VRWM aligns with HDMI sink-side DC bias margins, and 42.1 V VC prevents pixel corruption or EDID communication failure during discharge events. |
| Automotive Sensor Signal Lines | Industrial RS-485 Transceivers |
Use Scenario: Protecting analog outputs (e.g., 4–20 mA loop sensors) and LIN bus signals in engine control modules. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA) unidirectional clamp on sensor output lines to prevent false triggering or ADC saturation. Use Value: −65 °C to +175 °C operation supports under-hood placement; AEC-Q101 qualification ensures long-term reliability in vibration-prone environments. |
Use Scenario: Shielding RS-485 driver/receiver pins in factory automation gateways from induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary transient suppressor on A/B differential lines, coordinated with common-mode chokes for full IEC 61000-4-5 Level 3 compliance. Use Value: 200 W (10/1000 μs) and 1000 W (8/20 μs) ratings enable robust protection against lightning-induced surges without derating at elevated ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57T | Higher clamping voltage (47.3 V), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 500 pF capacitance. | Less suitable for high-speed interfaces; better for power-rail protection due to higher PPP (400 W). | Select when board space allows larger footprint and lower speed (≤10 Mbps) interfaces dominate. |
| TPD2E001DRYR | 2-channel bidirectional array, 15 pF capacitance, 5.5 V VRWM, not AEC-Q101 qualified. | Targeted at low-voltage consumer USB ports; lacks automotive qualification and 26 V standoff capability. | Choose only for cost-sensitive, non-automotive 3.3 V USB applications requiring ultra-low capacitance. |
Compared with SMAJ26A-E3/57T and TPD2E001DRYR, SMF26A-HE3-08 uniquely balances 26 V standoff, 42.1 V clamping, 230 pF, and AEC-Q101 qualification in a 3.9 mm × 1.9 mm footprint - making it optimal for space-constrained automotive and industrial high-speed data line protection.
Availability
SMF26A-HE3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive sensor signal conditioning, and industrial RS-485 transceiver hardening requiring stable component supply across production lifecycles.
Supply support for SMF26A-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 signal line protection with optimized clamping performance and AEC-Q101 qualification - engineered specifically for ESD-hardened interfaces in harsh-environment electronics.
FAQ
What is the maximum clamping voltage of the SMF26A-HE3-08 under a 10/1000 µs surge?
The SMF26A-HE3-08 has a maximum reverse clamping voltage (VC) of 42.1 V when subjected to a 4.8 A peak pulse current with a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table of Vishay's document 85881 and ensures downstream ICs remain within safe operating limits during standardized surge events.
Is SMF26A-HE3-08 qualified for automotive applications?
Yes, SMF26A-HE3-08 is AEC-Q101 qualified, having passed stress tests including human body model ESD (>8 kV), temperature cycling, and mechanical shock. The qualification applies directly to this part number as confirmed in Vishay's Rev. 2.4 datasheet (document 85881), supporting use in engine control units, infotainment interfaces, and ADAS sensor modules.
What package type does SMF26A-HE3-08 use, and what are its key dimensions?
SMF26A-HE3-08 uses the DO-219AB (SMF) package: 3.9 mm length × 1.9 mm width × 1.08 mm height, with cathode bar marking and MSL level 1 rating. Its footprint matches SOD-123W outlines and supports wave/reflow soldering up to 260 °C, as documented in Vishay's package drawing S8-V-3915.01-001.
How does the capacitance of SMF26A-HE3-08 affect high-speed signal integrity?
With 230 pF typical capacitance at 0 V and 1 MHz, SMF26A-HE3-08 introduces minimal loading on USB 2.0 (480 Mbps) and CAN FD (5 Mbps) signals - verified via Vishay's Fig. 5 and Fig. 6 showing CD vs. VR characteristics. This enables reliable eye diagram compliance without equalization or signal attenuation in standard-length traces.
What is the standoff voltage (VRWM) and why is it critical for SMF26A-HE3-08 selection?
The SMF26A-HE3-08 has a maximum standoff voltage (VRWM) of 26 V, meaning it remains non-conductive below this DC or RMS voltage. This parameter is essential for matching 24 V nominal systems (e.g., industrial PLC I/O, automotive body controllers), ensuring no leakage current or false triggering during normal operation while maintaining headroom for ripple and tolerance.
SMF26A-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):
- 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:
- -
- Capacitance @ Frequency:
- 230pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF26A-HE3-08 FAQ
1.How can I place an order for SMF26A-HE3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF26A-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 SMF26A-HE3-08 reliable?
The price and inventory of SMF26A-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 SMF26A-HE3-08 is usually 5 days.
3.What payment methods are accepted for SMF26A-HE3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF26A-HE3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF26A-HE3-08?
SMF26A-HE3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF26A-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 SMF26A-HE3-08?
For technical support, including SMF26A-HE3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF26A-HE3-08 requirements.
6.How does Aetrix verify that SMF26A-HE3-08 is sourced from the original manufacturer or authorized distributors?
All SMF26A-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 SMF26A-HE3-08 meets industry standards.
7.What is the process for return or replacement of SMF26A-HE3-08?
All SMF26A-HE3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF26A-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 SMF26A-HE3-08 part is unused and in its original packaging.
Return procedure for SMF26A-HE3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF26A-HE3-08 Tags
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