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Vishay General Semiconductor - Diodes Division SMF36A-HM3-18
- Part No.:
- SMF36A-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF36A-HM3-18.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:4,325
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Product details
Overview
SMF36A-HM3-18 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 36 V stand-off voltage (VRWM), 40–44.3 V reverse breakdown (VBR), 58.1 V maximum clamping voltage at 3.4 A peak pulse current, and 200 W peak pulse power (10/1000 μs). It delivers ±30 kV IEC 61000-4-2 ESD immunity and supports automotive-grade reliability per AEC-Q101.
For engineers reviewing the SMF36A-HM3-18 datasheet, SMF36A-HM3-18 pinout, SMF36A-HM3-18 application, or SMF36A-HM3-18 equivalent, key selection criteria include clamping performance under 3.4 A surge, low 178 pF capacitance at 0 V for USB 2.0 and HDMI signal integrity, SOD-123W-compatible footprint, and AEC-Q101 qualification for harsh-environment deployment.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche technology to clamp transient overvoltages before they damage downstream ICs. Its low incremental surge resistance ensures rapid response and minimal voltage overshoot during ESD events.
The SMF36A-HM3-18 is optimized for DC-biased signal paths where reverse polarity protection is not required-its cathode-anode configuration enables integration into supply rail or I/O line protection with minimal forward voltage drop (VF = 2.5 V at 50 A surge) and stable thermal performance up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 36 V - Maximum continuous reverse operating voltage before leakage exceeds 0.1 µA; sets safe margin below system supply rails. |
| Reverse Breakdown (VBR) | 40–44.3 V at 1 mA - Confirmed avalanche initiation range; ensures reliable triggering above normal operating voltage. |
| Clamping Voltage (VC) | 58.1 V max at 3.4 A (10/1000 µs) - Limits transient voltage seen by protected IC; critical for 3.3 V/5 V interface survivability. |
| Peak Pulse Power | 200 W (10/1000 µs) - Sustains short-duration surges without degradation; validated per IEC 61000-4-5 Level 3. |
| Capacitance (CD) | 178 pF at 0 V, 1 MHz - Low enough for USB 2.0 (480 Mbps) and HDMI 1.4 signal integrity; avoids data eye closure. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Meets industrial and automotive ESD robustness requirements without external filtering. |
| Junction Temp Range | −65 to +175 °C - Enables operation in under-hood automotive, industrial control, and outdoor telecom environments. |
Pinout & Package
SMF36A-HM3-18 uses the DO-219AB (SOD-123W-compatible) surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, MSL level 1, reflow-solderable, with cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected signal or power line; conducts surge current toward cathode during overvoltage event. |
| Cathode | Ground/reference side | Connected to system ground or low-impedance return path; defines unidirectional clamping direction and polarity. |
Key Features
| Feature | Design Value |
|---|---|
| "Low Noise" fast-response technology | Sub-nanosecond response time ensures clamping activation before ESD transients propagate into sensitive circuitry. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment, ADAS sensors, and body electronics requiring long-term reliability. |
| Wave and reflow solderable | Compatible with standard SMT assembly processes up to 260 °C peak temperature; no special handling required. |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meets safety standards for enclosed industrial and transportation equipment. |
| Low incremental surge resistance | Minimizes voltage overshoot during high-current transients, improving clamping precision and downstream IC protection margin. |
Applications
| USB 2.0 Interface Protection | HDMI 1.4 Data Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable media devices against ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between each data line and ground, clamping transients while preserving signal rise/fall times. Use Value: 178 pF capacitance avoids USB 2.0 eye diagram distortion; ±30 kV ESD rating eliminates need for secondary filtering stages. | Use Scenario: Safeguarding TMDS clock and data channels in set-top boxes and AV receivers exposed to user-accessible ports. IC Role / Device Role / Timing Role: Standoff-rated clamping device on each TMDS lane, referenced to chassis ground to suppress common-mode surges. Use Value: 36 V VRWM aligns with HDMI 1.4 DC bias levels; 58.1 V VC ensures receiver ICs (e.g., ADV7611) remain within absolute maximum ratings. |
| Automotive Infotainment Display Port | Industrial CAN FD Transceiver Protection |
Use Scenario: Shielding LVDS or FPD-Link III video bus lines connecting head unit to dashboard display in vehicles. IC Role / Device Role / Timing Role: Single-channel unidirectional suppressor on each signal line, mounted adjacent to connector to minimize inductance. Use Value: AEC-Q101 qualification guarantees operation across −40 to +105 °C ambient; 175 °C TJ rating supports under-dash thermal environments. | Use Scenario: Protecting CAN FD transceiver I/O pins (e.g., TCAN1042H) from load dump and ESD in factory automation nodes. IC Role / Device Role / Timing Role: Rail-to-rail clamping diode on CANH/CANL lines, referenced to local ground to limit differential and common-mode transients. Use Value: 200 W peak pulse power handles ISO 7637-2 Pulse 1/2b surges; 3.4 A IPPM matches typical CAN FD bus fault current limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/57T | Higher 64.5 V clamping voltage at 3.1 A; SMA (DO-214AC) package; 200 W rating same, but larger footprint (4.5 × 2.7 mm). | Less suitable for space-constrained USB/HDMI layouts; better for higher-energy industrial surge zones. | Select when board area allows larger package and higher clamping tolerance is acceptable for 3.3 V systems. |
| TPD2E001DRYR | 2-channel, 15 pF per line, 12 V VRWM; ultra-low capacitance but lower voltage rating; QFN-6 package. | Designed for high-speed digital interfaces (USB 3.0, MIPI); not rated for 36 V rail protection or AEC-Q101. | Choose only for low-voltage, multi-line, high-frequency applications-never as direct replacement for SMF36A-HM3-18's 36 V capability. |
Compared with SMAJ36A-E3/57T and TPD2E001DRYR, the SMF36A-HM3-18 uniquely balances 36 V standoff, 178 pF capacitance, AEC-Q101 qualification, and DO-219AB compactness-making it optimal for automotive and industrial signal-line protection where voltage rating, size, and reliability are jointly constrained.
Availability
SMF36A-HM3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI 1.4 data line safeguarding, and automotive infotainment display port hardening requiring stable component supply and long-term lifecycle assurance.
Supply support for SMF36A-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, application-optimized devices for automotive, industrial, and computing markets.
The SMF series targets high-speed signal line protection with AEC-Q101 qualification, low capacitance, and precise clamping-designed specifically for ESD-hardened interfaces in demanding environments.
FAQ
What is the clamping voltage of the SMF36A-HM3-18 at its rated peak pulse current?
The SMF36A-HM3-18 has a maximum clamping voltage (VC) of 58.1 V at 3.4 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMF36A-HM3-18 maintains this clamping performance across its full operating temperature range.
Is the SMF36A-HM3-18 suitable for automotive applications?
Yes, the SMF36A-HM3-18 is AEC-Q101 qualified and rated for operation from −65 °C to +175 °C junction temperature. Its construction, testing, and packaging meet automotive reliability requirements for use in infotainment, ADAS sensor interfaces, and body electronics. The SMF36A-HM3-18 is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the SMF family.
What package type does the SMF36A-HM3-18 use, and is it compatible with standard SMT processes?
The SMF36A-HM3-18 uses the DO-219AB (SOD-123W-compatible) surface-mount package, measuring 3.9 mm × 1.9 mm × 1.08 mm. It is fully wave and reflow solderable, qualified for peak reflow temperatures up to 260 °C per J-STD-020, and classified as MSL level 1-requiring no dry pack or baking prior to assembly. The SMF36A-HM3-18 footprint matches industry-standard SOD-123W land patterns.
How does the capacitance of the SMF36A-HM3-18 affect high-speed signal integrity?
The SMF36A-HM3-18 exhibits 178 pF typical capacitance at 0 V and 1 MHz, which is low enough to avoid significant signal degradation on USB 2.0 (480 Mbps) and HDMI 1.4 (up to 3.4 Gbps) links when properly laid out. Its capacitance rolls off with increasing reverse bias, further reducing loading at operating voltages. The SMF36A-HM3-18 is routinely deployed in these interfaces without equalization or compensation.
Does the SMF36A-HM3-18 provide bidirectional or unidirectional ESD protection?
The SMF36A-HM3-18 is a unidirectional ESD protection diode, configured as a single avalanche junction with anode and cathode terminals. It clamps only in the reverse direction-protecting against positive transients on the cathode side and negative transients on the anode side-making it ideal for DC-biased lines like power rails or single-ended I/O. The SMF36A-HM3-18 is not suitable for AC-coupled or truly bidirectional signal paths without additional design considerations.
SMF36A-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):
- 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-HM3-18 FAQ
1.How can I place an order for SMF36A-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF36A-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 SMF36A-HM3-18 reliable?
The price and inventory of SMF36A-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 SMF36A-HM3-18 is usually 5 days.
3.What payment methods are accepted for SMF36A-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF36A-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF36A-HM3-18?
SMF36A-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF36A-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 SMF36A-HM3-18?
For technical support, including SMF36A-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF36A-HM3-18 requirements.
6.How does Aetrix verify that SMF36A-HM3-18 is sourced from the original manufacturer or authorized distributors?
All SMF36A-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 SMF36A-HM3-18 meets industry standards.
7.What is the process for return or replacement of SMF36A-HM3-18?
All SMF36A-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF36A-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 SMF36A-HM3-18 part is unused and in its original packaging.
Return procedure for SMF36A-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF36A-HM3-18 Tags
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