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Vishay SMF22A-HE3_A08
- Part No.:
- SMF22A-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF22A-HE3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,187
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Product details
Overview
SMF22A-HE3_A08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for clamping transient overvoltages on signal or power lines. It features a 22 V standoff voltage (VRWM), 24.4–27 V reverse breakdown (VBR), 5.6 A peak pulse current (IPPM) at 10/1000 μs, 35.5 V maximum clamping voltage (VC), and 271 pF typical capacitance at 1 MHz - optimized for high-speed data lines including USB 2.0 and HDMI interfaces.
For engineers reviewing the SMF22A-HE3_A08 datasheet, SMF22A-HE3_A08 pinout, SMF22A-HE3_A08 application, or SMF22A-HE3_A08 equivalent, this device is selected for robust ±30 kV IEC 61000-4-2 ESD protection, AEC-Q101 qualification, low clamping voltage under surge, and compatibility with automated SMT assembly using wave/reflow soldering.
Technical Context
The SMF22A-HE3_A08 operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche technology to clamp transients above its reverse standoff voltage. Its low incremental surge resistance enables fast response (<1 ns) and stable clamping performance across temperature (−65 °C to +175 °C).
It complies with IEC 61000-4-2 (±30 kV contact/air discharge) and AEC-Q101 (H3B human body model >8 kV), and is rated for 200 W peak pulse power (10/1000 μs) and 1000 W (8/20 μs per IEC 61000-4-5). The device uses a planar junction structure housed in an ultra-low-profile SOD-123W-compatible DO-219AB package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 18–20 V nominal supply rails. |
| Breakdown Voltage (VBR) | 24.4–27 V at 1 mA - ensures reliable turn-on during overvoltage events while avoiding false triggering during normal operation. |
| Clamping Voltage (VC) | 35.5 V at 5.6 A (10/1000 μs) - limits downstream voltage stress to protect 3.3 V or 5 V logic interfaces and analog front-ends. |
| Peak Pulse Current (IPPM) | 5.6 A (10/1000 μs) - supports robust protection against common ESD and lightning-induced surges in industrial and automotive environments. |
| Capacitance (CD) | 271 pF at 0 V, 1 MHz - suitable for <10 Mbps data lines (e.g., CAN, RS-485); low enough to avoid signal integrity degradation. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for consumer, automotive, and industrial end-equipment. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 × 1.9 × 1.08 mm footprint enables high-density PCB layout and automated reflow assembly. |
Pinout & Package
SMF22A-HE3_A08 is a two-terminal unidirectional TVS diode in the DO-219AB (SOD-123W-equivalent) surface-mount package. Cathode is marked by a bar on the device top surface. The package is RoHS-compliant, lead (Pb)-free, and qualified for MSL level 1 (J-STD-020) with peak reflow temperature up to 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side connection point | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode (bar-marked end) | High-side connection point | Connected to protected line (e.g., USB D+, HDMI TMDS+); conducts avalanche current when VRWM is exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables sustained protection against repetitive ESD and surge events without thermal runaway in compact layouts. |
| ±30 kV IEC 61000-4-2 ESD immunity | Meets highest industrial and automotive ESD immunity class without external shielding or filtering overhead. |
| AEC-Q101 qualified | Validated for automotive under-hood and infotainment applications requiring extended temperature range and reliability. |
| Low clamping voltage (35.5 V @ 5.6 A) | Minimizes voltage overshoot on protected ICs, reducing risk of latch-up or gate oxide damage in sensitive receivers. |
| "Low Noise" fast-response technology | Sub-nanosecond response time ensures clamping activation before transient energy couples into downstream circuitry. |
Applications
| USB 2.0 Data Lines | HDMI TMDS Channels |
|---|---|
|
Use Scenario: Protecting differential high-speed data pairs (D+/D−) in portable and embedded USB hosts/peripherals against ESD during hot-plug events. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between each data line and ground, absorbing ±30 kV contact discharge pulses. Use Value: Maintains signal integrity with 271 pF capacitance while limiting clamped voltage to 35.5 V - below absolute maximum ratings of USB transceivers. |
Use Scenario: Safeguarding HDMI 1.4/2.0 TMDS clock and data channels (TMDS0/1/2/C) from ESD in AV receivers, monitors, and set-top boxes. IC Role / Device Role / Timing Role: Single-channel TVS per TMDS lane, mounted adjacent to connector to minimize trace inductance and improve clamping efficiency. Use Value: Clamps transients within 1 ns, preserving edge rate and eye diagram integrity for 2.25 Gbps signals without added jitter or attenuation. |
| Automotive Infotainment Displays | Industrial RS-485 Communication Ports |
|
Use Scenario: ESD protection for LVDS or FPD-Link II video interface lines connecting head units to TFT displays in vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS on each video data pair, leveraging AEC-Q101 qualification and −65 °C to +175 °C operating range. Use Value: Withstands harsh automotive thermal cycling and meets OEM-level ESD test requirements (e.g., GMW3172, Ford ES-XW7T-1A278-AC). |
Use Scenario: Transient suppression on RS-485 bus lines (A/B) in factory automation controllers, PLCs, and motor drives exposed to long cable runs. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two SMF22A-HE3_A08 devices (anode-to-anode configuration) for balanced clamping. Use Value: Delivers 35.5 V clamping at 5.6 A while maintaining <100 Ω dynamic impedance - critical for maintaining common-mode noise rejection in noisy industrial settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Same 22 V VRWM and DO-214AC (SMA) package; higher IPPM (12.3 A) but larger footprint (4.5 × 2.7 mm) and 400 pF capacitance. | Better suited for power-line protection where size and capacitance are less critical than surge handling. | Select SMAJ22A-E3/57T when higher surge current rating is required and board space allows larger package. |
| TPD2E001DRYR | 2-channel, 15 pF dual ESD array in USON-6; lower capacitance but only 12 kV IEC 61000-4-2 rating and no AEC-Q101 qualification. | Targeted at space-constrained, low-capacitance USB/MIPI interfaces - not for automotive or high-surge environments. | Choose TPD2E001DRYR for ultra-high-speed, low-capacitance applications where ESD severity is moderate and AEC-Q101 is not mandated. |
Compared with SMAJ22A-E3/57T and TPD2E001DRYR, the SMF22A-HE3_A08 uniquely balances compact DO-219AB size, AEC-Q101 qualification, ±30 kV ESD rating, and 271 pF capacitance - making it optimal for automotive and industrial high-speed serial interfaces where reliability, size, and signal fidelity are jointly constrained.
Availability
SMF22A-HE3_A08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial communication ports, HDMI/USB interface protection, and other applications requiring stable component supply with full traceability and lifecycle support.
Supply support for SMF22A-HE3_A08 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 is part of Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for high-reliability ESD and surge protection in automotive, industrial, and computing applications demanding AEC-Q101 compliance and low-profile packaging.
FAQ
What is the maximum clamping voltage of the SMF22A-HE3_A08 under standard test conditions?
The SMF22A-HE3_A08 has a maximum clamping voltage (VC) of 35.5 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 5.6 A. This value is measured per IEC 61000-4-5 and ensures downstream ICs remain within safe operating voltage limits during transient events. The SMF22A-HE3_A08 maintains this clamping performance across its full operating temperature range of −65 °C to +175 °C.
Is the SMF22A-HE3_A08 qualified for automotive applications?
Yes, the SMF22A-HE3_A08 is AEC-Q101 qualified and rated for human body model (HBM) ESD >8 kV (Class H3B). It operates reliably from −65 °C to +175 °C and meets stringent automotive environmental stress requirements, including thermal cycling and humidity testing. The SMF22A-HE3_A08 is widely used in automotive infotainment, ADAS camera links, and body control modules where certified transient protection is mandatory.
What package type does the SMF22A-HE3_A08 use, and is it compatible with standard SMT processes?
The SMF22A-HE3_A08 uses the DO-219AB package (also known as SOD-123W outline), measuring 3.9 × 1.9 × 1.08 mm. It is fully compatible with standard wave and reflow soldering processes, rated for peak reflow temperatures up to 260 °C (J-STD-020 MSL level 1), and supports automated pick-and-place assembly. The SMF22A-HE3_A08's low-profile design minimizes board space while maintaining mechanical robustness in vibration-prone environments.
How does the capacitance of the SMF22A-HE3_A08 affect high-speed signal integrity?
The SMF22A-HE3_A08 exhibits 271 pF typical capacitance at 0 V and 1 MHz, which is well-suited for data rates up to 10 Mbps (e.g., RS-485, CAN FD) and moderate-speed interfaces like USB 2.0 (480 Mbps) when placed with minimal stub length. Its low capacitance avoids excessive signal rise-time degradation or insertion loss. For higher-speed protocols (e.g., USB 3.0, PCIe), lower-capacitance alternatives are recommended - but the SMF22A-HE3_A08 remains effective for cost-sensitive, robust protection where bandwidth is secondary to reliability.
Can the SMF22A-HE3_A08 be used for bidirectional protection?
The SMF22A-HE3_A08 is a unidirectional TVS diode and is not inherently bidirectional. However, it can be configured for bidirectional protection by connecting two devices anode-to-anode in series across the line and ground - a standard practice for RS-485 or CAN bus protection. In that configuration, each SMF22A-HE3_A08 clamps one polarity of transient, delivering symmetrical ±35.5 V clamping. This approach preserves the SMF22A-HE3_A08's low capacitance and AEC-Q101 qualification while achieving full bidirectional coverage.
SMF22A-HE3_A08 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 5.6A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 271pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF22A-HE3_A08 FAQ
1.How can I place an order for SMF22A-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF22A-HE3_A08 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 SMF22A-HE3_A08 reliable?
The price and inventory of SMF22A-HE3_A08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF22A-HE3_A08 is usually 5 days.
3.What payment methods are accepted for SMF22A-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF22A-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF22A-HE3_A08?
SMF22A-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF22A-HE3_A08 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 SMF22A-HE3_A08?
For technical support, including SMF22A-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF22A-HE3_A08 requirements.
6.How does Aetrix verify that SMF22A-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF22A-HE3_A08 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 SMF22A-HE3_A08 meets industry standards.
7.What is the process for return or replacement of SMF22A-HE3_A08?
All SMF22A-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF22A-HE3_A08, 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 SMF22A-HE3_A08 part is unused and in its original packaging.
Return procedure for SMF22A-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF22A-HE3_A08 Tags
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