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Vishay SMF36A-HE3_A18
- Part No.:
- SMF36A-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF36A-HE3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,524
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Product details
Overview
SMF36A-HE3_A18 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 range (VBR), 58.1 V maximum clamping voltage at 3.4 A peak pulse current, and 200 W peak pulse power (10/1000 μs). It is widely used in USB 2.0, HDMI, and automotive infotainment interfaces.
For engineers reviewing the SMF36A-HE3_A18 datasheet, SMF36A-HE3_A18 pinout, SMF36A-HE3_A18 application, or SMF36A-HE3_A18 equivalent, key selection criteria include clamping voltage under 3.4 A surge, low 178 pF capacitance at 0 V, ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification, and SOD-123W-compatible DO-219AB packaging for space-constrained PCB layouts.
Technical Context
This device operates as a single-channel unidirectional TVS diode with cathode-anode polarity, optimized for fast response to electrostatic discharge events. Its "Low Noise" technology ensures sub-nanosecond response time, and its low incremental surge resistance enables effective clamping during 10/1000 μs transients.
The SMF36A-HE3_A18 is rated for continuous operation from –65 °C to +175 °C, supports wave and reflow soldering per J-STD-020 MSL level 1, and maintains stable performance across its full operating temperature range without derating up to 125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 36 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin for 33 V nominal bus systems. |
| Clamping Voltage (VC) | 58.1 V at IPPM = 3.4 A - Peak voltage seen by protected circuit during 10/1000 μs surge; limits stress on downstream ICs. |
| Capacitance (CD) | 178 pF at VR = 0 V, f = 1 MHz - Low enough for USB 2.0 (480 Mbps) signal integrity without significant edge degradation. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Meets highest industrial and automotive ESD immunity requirements. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline enabling dense layout in portable electronics. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including HBM > 8 kV, enabling use in ADAS camera links and infotainment ports. |
| Peak Pulse Power | 200 W (10/1000 μs) - Sustains short-duration surges common in hot-plug and cable-discharge events. |
Pinout & Package
SMF36A-HE3_A18 uses the DO-219AB (SMF) package: a 2-terminal, surface-mount, low-profile case with cathode marking bar. Dimensions are 3.9 mm (L) × 1.9 mm (W) × 1.08 mm (H); footprint requires 2.9 mm × 1.4 mm pad area with 1.3 mm solder mask opening per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Ground reference node | Connected to system ground plane; carries surge current away from protected line during clamping. |
| Cathode (bar-marked end) | Protected line interface | Connected directly to I/O line (e.g., USB D+); conducts when line voltage exceeds VRWM + VBR tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-nanosecond response | Enables clamping before ESD energy couples into sensitive analog/digital receivers - critical for HDMI and MIPI interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Indicates high surge current handling efficiency and minimal overvoltage stress on protected ICs during transients. |
| 178 pF capacitance at 0 V | Preserves signal rise/fall times in 480 Mbps USB 2.0 channels; avoids jitter or bit errors in high-speed serial links. |
| AEC-Q101 qualified | Validates robustness for automotive applications including temperature cycling, humidity testing, and mechanical shock per AEC standards. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profiles up to 260 °C peak - eliminates baking requirements and simplifies manufacturing. |
Applications
| USB 2.0 Interface Protection | HDMI Port ESD Suppression |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines in portable medical devices against repeated hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between each data line and chassis ground, providing low-capacitance, fast-response clamping. Use Value: Maintains <1 ns response and 178 pF loading to preserve 480 Mbps eye diagram integrity while surviving ±30 kV contact ESD. | Use Scenario: Safeguarding HDMI Type-A receptacles in automotive head units from ESD during user connection of external displays. IC Role / Device Role / Timing Role: Single-channel unidirectional suppressor on TMDS clock and data lanes, referenced to shield ground. Use Value: Clamps transients to ≤58.1 V within nanoseconds, preventing latch-up in HDMI receiver ICs without degrading 165 MHz pixel clock timing. |
| Automotive Camera Link Protection | Industrial Sensor Interface Guarding |
Use Scenario: Shielding FAKRA or mini-FAKRA coaxial video inputs in rear-view cameras from ESD induced by door closure or static discharge. IC Role / Device Role / Timing Role: Cathode-connected to signal line, anode to ground; deployed per differential pair in GMSL or HD-SDI analog video paths. Use Value: Withstands -65 °C to +175 °C junction temperature and passes AEC-Q101, ensuring reliability in under-hood camera modules. | Use Scenario: Protecting RS-485 transceiver I/O pins in factory automation PLCs exposed to maintenance personnel ESD and relay-switching transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on A/B bus lines, grounded via short trace to local ground pour near connector. Use Value: 36 V VRWM matches typical RS-485 common-mode range; 58.1 V clamping prevents transceiver damage during 2 kV EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5A (Vishay) | DO-214AC (SMA) package; larger 4.5 mm × 2.7 mm footprint; 60 V VC at 3.2 A; 250 pF capacitance. | Higher capacitance limits use to ≤100 Mbps interfaces; better thermal mass suits higher-power surge environments. | Select when board space allows larger package and higher surge energy absorption is prioritized over signal integrity. |
| TPD2E001DRYR (TI) | 0.65 mm × 0.65 mm DRY (X2SON) dual-channel array; 3.6 V VRWM; 10 pF capacitance; not AEC-Q101 qualified. | Designed for ultra-low-capacitance USB/MIPI protection; lacks automotive qualification and 36 V standoff capability. | Choose only for low-voltage, high-speed digital interfaces where VRWM < 5 V and AEC-Q101 is not required. |
Compared with SMAJ36A-E3/5A and TPD2E001DRYR, SMF36A-HE3_A18 uniquely balances 36 V standoff, 178 pF capacitance, ±30 kV ESD rating, AEC-Q101 qualification, and DO-219AB compactness - making it optimal for automotive and industrial high-speed data line protection where space, speed, and reliability intersect.
Availability
SMF36A-HE3_A18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial USB host ports, and medical imaging equipment requiring stable component supply and long-term lifecycle assurance.
Supply support for SMF36A-HE3_A18 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 interface protection with AEC-Q101 qualification, low capacitance, and tight clamping - engineered specifically for USB, HDMI, and automotive camera links demanding robust ESD resilience in miniature packages.
FAQ
What is the maximum clamping voltage of the SMF36A-HE3_A18 under standard test conditions?
The SMF36A-HE3_A18 has a maximum clamping voltage (VC) of 58.1 V when subjected to a 10/1000 μs surge current of 3.4 A. This value is measured per IEC 61000-4-5 and defines the peak voltage imposed on the protected circuit during transient events. The clamping performance is guaranteed across the full operating temperature range from –65 °C to +175 °C, and the SMF36A-HE3_A18 maintains this specification without derating up to 125 °C ambient.
Is the SMF36A-HE3_A18 suitable for automotive applications?
Yes, the SMF36A-HE3_A18 is AEC-Q101 qualified and rated for operation from –65 °C to +175 °C, meeting automotive reliability requirements for under-hood and cabin electronics. It delivers ±30 kV contact and air discharge ESD immunity per IEC 61000-4-2 and supports human body model (HBM) > 8 kV. These attributes make the SMF36A-HE3_A18 appropriate for protecting camera links, infotainment ports, and sensor interfaces in production vehicles.
What is the capacitance of the SMF36A-HE3_A18 and how does it affect high-speed signal integrity?
The SMF36A-HE3_A18 exhibits 178 pF typical capacitance at 0 V reverse bias and 1 MHz frequency. This value is low enough to avoid significant signal distortion in USB 2.0 (480 Mbps) and HDMI 1.4 (up to 165 MHz TMDS clock) applications. Capacitance decreases with increasing reverse voltage, further minimizing loading during normal operation. The SMF36A-HE3_A18's capacitance profile is verified in Vishay's Fig. 5–8 and supports clean eye diagrams without added jitter.
Does the SMF36A-HE3_A18 require special PCB layout considerations?
Yes - to maximize ESD protection effectiveness, the SMF36A-HE3_A18 must be placed as close as possible to the protected connector, with the cathode tied directly to the I/O line and the anode connected via the shortest possible trace to a low-inductance ground plane. The recommended footprint (2.9 mm × 1.4 mm) and solder mask openings (1.3 mm × 1.3 mm) are specified in Vishay's S8-V-3915.01-001. Avoid routing other signals beneath the SMF36A-HE3_A18 body to prevent coupling.
What packaging and reel options are available for the SMF36A-HE3_A18?
The SMF36A-HE3_A18 is supplied in 8 mm tape on 13″ reels, with 10,000 units per reel and a minimum order quantity of 50,000 units. The "_A18" suffix denotes this specific packaging configuration. The device is RoHS-compliant and lead (Pb)-free with tin-plated terminations, compatible with standard reflow profiles up to 260 °C peak temperature. Moisture sensitivity level is MSL 1, permitting unlimited floor life without baking prior to assembly.
SMF36A-HE3_A18 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):
- 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF36A-HE3_A18 FAQ
1.How can I place an order for SMF36A-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF36A-HE3_A18 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_A18 reliable?
The price and inventory of SMF36A-HE3_A18 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_A18 is usually 5 days.
3.What payment methods are accepted for SMF36A-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF36A-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF36A-HE3_A18?
SMF36A-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF36A-HE3_A18 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_A18?
For technical support, including SMF36A-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF36A-HE3_A18 requirements.
6.How does Aetrix verify that SMF36A-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF36A-HE3_A18 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_A18 meets industry standards.
7.What is the process for return or replacement of SMF36A-HE3_A18?
All SMF36A-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF36A-HE3_A18, 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_A18 part is unused and in its original packaging.
Return procedure for SMF36A-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF36A-HE3_A18 Tags
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