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Vishay General Semiconductor - Diodes Division SMF11A-HM3-18
- Part No.:
- SMF11A-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF11A-HM3-18.pdf
- Description:
- TVS DIODE 11VWM 18.2VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:2,315
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Product details
Overview
SMF11A-HM3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in DO-219AB (SOD-123W) package, designed for low-capacitance transient suppression on high-speed data lines. It features 11 V standoff voltage (VRWM), 12.2–13.5 V breakdown range (VBR), 18.2 V max clamping voltage at 11 A IPPM, 509 pF typical capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF11A-HM3-18 datasheet, SMF11A-HM3-18 pinout, SMF11A-HM3-18 application, or SMF11A-HM3-18 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low capacitance for signal integrity, AEC-Q101 qualification status, and SOD-123W footprint compatibility with automated assembly.
Technical Context
This device operates as a unidirectional TVS diode with avalanche breakdown mechanism, optimized for fast response (<1 ns) to electrostatic discharge events. Its low incremental surge resistance ensures minimal voltage overshoot during transient clamping, while the "Low Noise" technology minimizes parasitic oscillation in high-frequency signal paths.
The SMF11A-HM3-18 is rated for 200 W peak pulse power (10/1000 μs), supports 50 A non-repetitive forward surge current (8.3 ms half-sine), and maintains stable operation across -65 °C to +175 °C ambient temperature - enabling use in automotive under-hood and industrial control environments where thermal robustness is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 11 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 12 V nominal bus systems. |
| Breakdown Voltage (VBR) | 12.2–13.5 V at 1 mA - guaranteed avalanche initiation range; ensures reliable triggering without premature leakage. |
| Clamping Voltage (VC) | 18.2 V max at 11 A IPPM - limits downstream IC voltage stress during 10/1000 μs transients; enables robust protection of 16 V-tolerant receivers. |
| Capacitance (CD) | 509 pF typical at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) signal integrity; avoids excessive rise-time degradation. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for industrial and automotive end-equipment. |
| Package | DO-219AB (SOD-123W) - 3.9 × 1.9 × 1.08 mm outline; compatible with standard SMT reflow profiles and 8 mm tape-and-reel handling (18" reel). |
Pinout & Package
SMF11A-HM3-18 uses a 2-terminal DO-219AB (SOD-123W) package with cathode-bar marking. The device has no internal circuitry beyond the single PN junction; terminals are non-polarized in function but polarity-sensitive in placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference plane; carries full surge current during clamping event. |
| Cathode | Protected line connection | Connected to I/O line (e.g., USB D+, HDMI TMDS+); blocks normal operation up to 11 V, then avalanches to shunt energy. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | ±30 kV contact/air - eliminates need for secondary ESD stages in cost-sensitive consumer and industrial designs. |
| AEC-Q101 qualification | Qualified per Rev. D - supports automotive infotainment and body electronics applications requiring reliability validation. |
| Low-profile SOD-123W footprint | 1.08 mm height - enables routing beneath connectors and dense PCB layouts without mechanical interference. |
| Wave/reflow solderable | Compatible with J-STD-020 MSL level 1 - zero bake requirement; simplifies manufacturing and reduces process risk. |
| "Low Noise" fast response | <1 ns turn-on - prevents signal distortion on high-speed differential pairs by minimizing clamping delay jitter. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D- lines against ESD events during hot-plug insertion in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between connector and PHY IC input pins. Use Value: 509 pF capacitance preserves 480 Mbps eye diagram integrity; 18.2 V clamping prevents damage to 16 V-tolerant USB transceivers. | Use Scenario: Safeguarding HDMI TMDS+/- channels from user-handling ESD in home theater AV receivers. IC Role / Device Role / Timing Role: Low-capacitance TVS diode mounted directly at HDMI receptacle to minimize stub length. Use Value: ±30 kV ESD rating meets IEC 61000-4-2 Level 4; DO-219AB package fits tight spacing near HDMI Type A connector. |
| Automotive Sensor Interface | Industrial CAN FD Transceiver Port |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in engine control modules exposed to under-hood ESD. IC Role / Device Role / Timing Role: Standoff-limited TVS protecting 12 V supply-rail referenced analog front-end inputs. Use Value: -65 °C to +175 °C operating range matches under-hood thermal profile; 11 V VRWM aligns with 12 V system nominal. | Use Scenario: Adding secondary ESD protection on CAN FD transceiver high-speed data lines (CANH/CANL) in factory automation gateways. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to CAN common-mode voltage, not ground. Use Value: 200 W peak pulse power handles coupled surges from nearby relay switching; AEC-Q101 qualification supports automotive-grade supply chain traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/5A | Higher clamping voltage (23.5 V), larger SMA package (4.5 × 2.7 × 2.2 mm), 600 pF capacitance | Less suitable for USB 2.0 due to higher capacitance and slower response; better for lower-speed 24 V industrial lines | Select SMAJ11A-E3/5A only when board space allows larger footprint and signal bandwidth is ≤100 Mbps. |
| TPD2E001DRYR | Bi-directional dual-channel array, 12 pF per channel, integrated 5 V DC blocking, 3.5 × 1.5 mm X2SON | Designed for high-density USB Type-C port protection; requires separate 5 V bias rail | Choose TPD2E001DRYR for new USB-C designs needing ultra-low capacitance; SMF11A-HM3-18 remains optimal for legacy USB 2.0 or single-line protection. |
Compared with SMAJ11A-E3/5A and TPD2E001DRYR, SMF11A-HM3-18 delivers the best balance of low capacitance, compact DO-219AB size, and automotive-qualified reliability for discrete single-line ESD protection - especially where cost, thermal performance, and proven manufacturability are prioritized over multi-channel integration.
Availability
SMF11A-HM3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line safeguarding, and automotive sensor interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMF11A-HM3-18 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 and passive components, specializing in high-reliability devices for automotive, industrial, and computing markets.
The SMF series targets high-speed data line protection with AEC-Q101 qualification, low capacitance, and robust surge handling - engineered specifically for ESD-critical interfaces in harsh environments.
FAQ
What is the clamping voltage of SMF11A-HM3-18 at its rated peak pulse current?
The SMF11A-HM3-18 has a maximum clamping voltage (VC) of 18.2 V at 11 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per IEC 61000-4-5 test methodology and ensures protected circuits remain below 19 V during worst-case transients. The SMF11A-HM3-18 achieves this with low incremental surge resistance, minimizing voltage overshoot beyond VC.
Is SMF11A-HM3-18 qualified to AEC-Q101, and what does that mean for automotive use?
Yes, SMF11A-HM3-18 is AEC-Q101 qualified per Rev. D, confirming it meets stress-test requirements for automotive electronic components including HTOL, temperature cycling, and ESD. This qualification validates its suitability for non-safety-critical automotive applications such as infotainment, body control modules, and sensor interfaces - though SMF11A-HM3-18 is not intended for safety-critical ADAS or powertrain functions unless explicitly validated by the end customer.
What is the capacitance of SMF11A-HM3-18, and how does it affect high-speed signal lines?
The SMF11A-HM3-18 exhibits 509 pF typical capacitance at 0 V and 1 MHz, measured per standard test conditions. This value is low enough to maintain signal integrity on USB 2.0 (480 Mbps) and HDMI 1.4 (up to 3.4 Gbps) differential pairs when placed with minimal trace stub length. The SMF11A-HM3-18's capacitance vs. voltage curve shows monotonic decrease above 1 V, further reducing loading during active signaling.
Does SMF11A-HM3-18 support both contact and air discharge ESD testing per IEC 61000-4-2?
Yes, SMF11A-HM3-18 is rated for ±30 kV contact discharge and ±30 kV air discharge per IEC 61000-4-2, tested with 10 pulses per polarity. This performance exceeds Level 4 (the highest defined severity level) of the standard, making SMF11A-HM3-18 appropriate for end equipment deployed in high-ESD-risk environments such as factory floors, medical labs, and consumer retail settings.
What package type does SMF11A-HM3-18 use, and is it compatible with standard SMT assembly processes?
SMF11A-HM3-18 uses the DO-219AB (SOD-123W) package: 3.9 mm × 1.9 mm × 1.08 mm with cathode-bar marking. It is fully compatible with standard wave and reflow soldering per J-STD-020 MSL level 1, with peak temperature tolerance up to 260 °C. The SMF11A-HM3-18's footprint matches IPC-7351B recommendations and supports automated optical inspection (AOI) due to its well-defined terminal geometry.
SMF11A-HM3-18 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 11A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 509pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF11A-HM3-18 FAQ
1.How can I place an order for SMF11A-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF11A-HM3-18 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 SMF11A-HM3-18 reliable?
The price and inventory of SMF11A-HM3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF11A-HM3-18 is usually 5 days.
3.What payment methods are accepted for SMF11A-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF11A-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF11A-HM3-18?
SMF11A-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF11A-HM3-18 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 SMF11A-HM3-18?
For technical support, including SMF11A-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF11A-HM3-18 requirements.
6.How does Aetrix verify that SMF11A-HM3-18 is sourced from the original manufacturer or authorized distributors?
All SMF11A-HM3-18 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 SMF11A-HM3-18 meets industry standards.
7.What is the process for return or replacement of SMF11A-HM3-18?
All SMF11A-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF11A-HM3-18, 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 SMF11A-HM3-18 part is unused and in its original packaging.
Return procedure for SMF11A-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF11A-HM3-18 Tags
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