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Vishay General Semiconductor - Diodes Division SMF36A-HE3-18
- Part No.:
- SMF36A-HE3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF36A-HE3-18.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:29,099
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Product details
Overview
SMF36A-HE3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for clamping transient overvoltages on data and signal lines. It features a 36 V stand-off voltage (VRWM), 40–44.3 V reverse breakdown range (VBR), 58.1 V maximum clamping voltage at 3.4 A peak pulse current (VC), 178 pF typical capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity - ideal for protecting USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF36A-HE3-18 datasheet, SMF36A-HE3-18 pinout, SMF36A-HE3-18 application, or SMF36A-HE3-18 equivalent, key selection criteria include clamping voltage vs. protected line voltage margin, capacitance impact on signal integrity, AEC-Q101 qualification status, and SOD-123W-compatible footprint compatibility with automated assembly processes.
Technical Context
This device operates as a single-channel, cathode-anode unidirectional TVS diode optimized for fast transient suppression. Its low incremental surge resistance enables tight clamping during 10/1000 μs surges, while "Low Noise" technology ensures sub-nanosecond response time to ESD events per IEC 61000-4-2.
The SMF36A-HE3-18 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 human body model >8 kV and is qualified for automotive and harsh-environment industrial use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 36 V - maximum continuous reverse operating voltage before significant leakage; defines upper limit of protected line DC bias. |
| Reverse Breakdown (VBR) | 40–44.3 V at 1 mA - onset voltage where clamping begins; ensures reliable turn-on above normal operating voltage margin. |
| Clamping Voltage (VC) | 58.1 V at 3.4 A (10/1000 μs) - peak voltage seen by downstream circuit during surge; determines minimum safe IC withstand rating. |
| Capacitance (CD) | 178 pF at 0 V, 1 MHz - directly impacts high-speed signal rise time and insertion loss; suitable for ≤480 Mbps interfaces. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds Level 4 immunity requirement; eliminates need for external ESD staging in many designs. |
| Package | DO-219AB (SOD-123W-compatible) - low-profile (1.08 mm height), reflow-solderable, MSL level 1, 3 mm × 1.9 mm footprint. |
| Thermal Resistance (RthJA) | 180 K/W on 3 mm × 3 mm Cu pads - informs derating under sustained surge duty cycles or elevated ambient temperatures. |
Pinout & Package
SMF36A-HE3-18 uses the DO-219AB (SMF) package: molded plastic case with cathode band marking, 2-terminal configuration, and dimensions of 3.9 mm × 1.9 mm × 1.08 mm. The package is compatible with SOD-123W, SOD-123F, and SOD-123FL footprints and supports wave and reflow soldering per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Transient return path | Connected to ground or low-impedance reference; carries full surge current during clamping event. |
| Cathode (K) | Protected line connection | Connected to I/O line being safeguarded; voltage at this terminal is clamped to ≤58.1 V during transients. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables robust protection against lightning-induced surges and system-level EFT without thermal runaway. |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for secondary ESD stages in consumer and industrial port designs meeting Level 4 compliance. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment, body electronics, and ADAS sensor interfaces. |
| 178 pF capacitance at 0 V | Preserves signal integrity on USB 2.0 (480 Mbps) and RS-485 links without requiring equalization or layout compensation. |
| Low-profile DO-219AB package | Reduces board space and improves mechanical reliability in vibration-prone environments such as transportation and industrial control. |
Applications
| USB 2.0 Interface Protection | HDMI DDC Channel Protection |
|---|---|
|
Use Scenario: Protecting USB 2.0 data lines (D+/D−) against ESD events during hot-plug and handling. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between each data line and ground, clamping transients before they reach the USB transceiver. Use Value: Maintains 480 Mbps signaling integrity with 178 pF capacitance while delivering ±30 kV contact discharge immunity per IEC 61000-4-2. |
Use Scenario: Safeguarding HDMI Display Data Channel (DDC) lines (SCL/SDA) from ESD during cable insertion and field maintenance. IC Role / Device Role / Timing Role: Standoff-rated TVS connected inline on 3.3 V DDC bus, suppressing transients without loading the 100 kHz I²C timing budget. Use Value: 36 V VRWM ensures no conduction during normal 3.3 V operation; 58.1 V VC prevents damage to HDMI source/sink EEPROMs. |
| Industrial Sensor Signal Lines | Automotive LIN Bus Nodes |
|
Use Scenario: Protecting analog and digital outputs of pressure, temperature, and position sensors in factory automation equipment. IC Role / Device Role / Timing Role: Single-channel unidirectional clamp on 0–10 V or 4–20 mA loop signals, referenced to system ground. Use Value: 175 °C max junction temperature and –65 °C min storage rating enable deployment in unheated enclosures and outdoor cabinets. |
Use Scenario: ESD hardening of LIN transceiver I/O pins in automotive door modules, seat controls, and lighting nodes. IC Role / Device Role / Timing Role: AEC-Q101-qualified TVS on LIN bus line, placed between transceiver and connector to absorb coupling-induced transients. Use Value: AEC-Q101 qualification and 36 V VRWM align with LIN physical layer specs (12 V nominal, 18 V max supply); 58.1 V VC stays below LIN IC absolute max ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/57T | Higher clamping voltage (69.4 V at 3.2 A), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 200 W rating same. | Less suitable for space-constrained layouts; higher VC may exceed downstream IC limits in low-voltage systems. | Prefer SMF36A-HE3-18 when board area is limited or clamping voltage margin is tight. |
| TPD2E007DRYR | 2-channel, 15 pF, 12 V VRWM, ±8 kV HBM, not AEC-Q101 qualified; uses SOT-553 package. | Designed for high-speed digital interfaces (e.g., I²C, GPIO); insufficient for 36 V line protection or automotive qualification. | Choose SMF36A-HE3-18 for single-line 36 V standoff, AEC-Q101 compliance, and higher surge robustness. |
Compared with SMAJ36A-E3/57T and TPD2E007DRYR, SMF36A-HE3-18 delivers tighter clamping (58.1 V vs. 69.4 V), smaller footprint (DO-219AB vs. SMA), and automotive qualification - making it optimal for space-limited, high-reliability 36 V signal line protection.
Availability
SMF36A-HE3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC channel safeguarding, and industrial sensor signal line hardening requiring stable component supply across production lifecycles.
Supply support for SMF36A-HE3-18 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, specializing in power management, sensing, and protection components with emphasis on reliability, precision, and automotive-grade qualification.
The SMF series targets high-density ESD protection for high-speed and automotive signal paths, combining low capacitance, fast response, and AEC-Q101 validation in ultra-compact surface-mount packages.
FAQ
What is the maximum clamping voltage of the SMF36A-HE3-18 under standard surge conditions?
The SMF36A-HE3-18 has a maximum clamping voltage (VC) of 58.1 V when subjected to a 10/1000 μs waveform at 3.4 A peak pulse current. This value is measured per IEC 61000-4-5 test conditions and defines the highest voltage that will appear across the protected line during a defined transient event. The SMF36A-HE3-18 maintains this clamping performance consistently across its qualified temperature range.
Is the SMF36A-HE3-18 qualified for automotive applications?
Yes, the SMF36A-HE3-18 is AEC-Q101 qualified, having passed stress tests including human body model ESD >8 kV and high-temperature operating life. It is rated for continuous operation from –65 °C to +175 °C and is suitable for use in automotive subsystems such as LIN bus nodes, sensor interfaces, and infotainment I/O protection. The SMF36A-HE3-18 meets the reliability and environmental requirements specified in the AEC-Q101 standard.
What package type does the SMF36A-HE3-18 use, and is it compatible with automated assembly?
The SMF36A-HE3-18 uses the DO-219AB (SMF) package - a low-profile, surface-mount case measuring 3.9 mm × 1.9 mm × 1.08 mm with cathode band marking. It is fully compatible with standard reflow and wave soldering processes, conforms to J-STD-020 MSL level 1, and supports automated pick-and-place with tape-and-reel packaging (7" or 13" reels). The SMF36A-HE3-18 footprint aligns with SOD-123W, enabling drop-in replacement in many existing layouts.
How does the capacitance of the SMF36A-HE3-18 affect high-speed signal integrity?
The SMF36A-HE3-18 exhibits 178 pF typical capacitance at 0 V and 1 MHz, which is well-suited for interfaces up to USB 2.0 speeds (480 Mbps) and industrial serial buses like RS-485. This capacitance introduces minimal signal degradation when placed on properly terminated lines and avoids excessive rise-time distortion. For higher-speed applications (e.g., USB 3.0 or HDMI TMDS), lower-capacitance alternatives would be required - but the SMF36A-HE3-18 remains optimal for cost-sensitive, robust 36 V line protection where bandwidth is secondary to surge resilience.
What is the standoff voltage rating of the SMF36A-HE3-18, and how does it relate to system design?
The SMF36A-HE3-18 has a maximum stand-off voltage (VRWM) of 36 V, meaning it remains in high-impedance state for reverse voltages up to this level during normal operation. This allows safe integration into 24 V and 32 V industrial or automotive signal paths without leakage or premature conduction. Designers must ensure the protected line's maximum steady-state voltage stays below 36 V to prevent device stress - the SMF36A-HE3-18 is therefore ideal for 24 V sensor outputs, LIN bus, and auxiliary power rail monitoring circuits.
SMF36A-HE3-18 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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 3.4A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 178pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF36A-HE3-18 FAQ
1.How can I place an order for SMF36A-HE3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF36A-HE3-18 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 SMF36A-HE3-18 reliable?
The price and inventory of SMF36A-HE3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF36A-HE3-18 is usually 5 days.
3.What payment methods are accepted for SMF36A-HE3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF36A-HE3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF36A-HE3-18?
SMF36A-HE3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF36A-HE3-18 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 SMF36A-HE3-18?
For technical support, including SMF36A-HE3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF36A-HE3-18 requirements.
6.How does Aetrix verify that SMF36A-HE3-18 is sourced from the original manufacturer or authorized distributors?
All SMF36A-HE3-18 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 SMF36A-HE3-18 meets industry standards.
7.What is the process for return or replacement of SMF36A-HE3-18?
All SMF36A-HE3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF36A-HE3-18, 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 SMF36A-HE3-18 part is unused and in its original packaging.
Return procedure for SMF36A-HE3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF36A-HE3-18 Tags
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