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Vishay General Semiconductor - Diodes Division SMF36A-M3-18
- Part No.:
- SMF36A-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF36A-M3-18.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:4,869
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Product details
Overview
SMF36A-M3-18 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 power lines. It features a 36 V stand-off voltage (VRWM), 40 V minimum breakdown voltage (VBR), 58.1 V maximum clamping voltage at 3.4 A peak pulse current (VC), 178 pF typical junction capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in automotive infotainment interfaces and industrial sensor signal conditioning.
For engineers reviewing the SMF36A-M3-18 datasheet, SMF36A-M3-18 pinout, SMF36A-M3-18 application, or SMF36A-M3-18 equivalent, this page delivers verified electrical parameters, package dimensions, real-world clamping behavior, AEC-Q101 qualification status, and direct alternative part comparisons - all aligned to Vishay's Rev. 2.4 specification sheet (Doc. #85881).
Technical Context
This device operates as a single-channel unidirectional TVS diode with avalanche breakdown clamping action. Its low incremental surge resistance enables fast response (<1 ns) and stable clamping under 10/1000 μs transients, while its SOD-123W-compatible DO-219AB footprint supports high-density PCB layouts in space-constrained modules.
The SMF36A-M3-18 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and withstands 50 A non-repetitive forward surge current. It meets AEC-Q101 stress requirements including H3B-class human body model (>8 kV) and operates across -65 °C to +175 °C ambient temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 36 V - maximum continuous reverse operating voltage before significant leakage; defines safe working margin below breakdown. |
| Breakdown Voltage (VBR) | 40–44.3 V at 1 mA - precise avalanche initiation threshold ensuring predictable clamping onset. |
| Clamping Voltage (VC) | 58.1 V at 3.4 A (10/1000 μs) - peak voltage seen by protected circuit during surge; critical for IC-level voltage tolerance alignment. |
| Junction Capacitance (CD) | 178 pF at 0 V, 1 MHz - low enough for USB 2.0 and CAN FD signal integrity, but not suitable for >100 MHz RF paths. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds Level 4 immunity for external ports in automotive and industrial enclosures. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 × 1.9 × 1.08 mm low-profile outline enabling automated placement and reflow compatibility. |
| AEC-Q101 Qualified | Yes - qualified per stress test conditions for automotive-grade reliability in engine control, ADAS, and infotainment subsystems. |
Pinout & Package
SMF36A-M3-18 uses a 2-terminal DO-219AB (SOD-123W-compatible) surface-mount package with cathode-bar marking. The device has no internal logic or control pins - only anode and cathode terminals for series connection across protected lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to signal or power line requiring transient suppression; conducts during positive surges when cathode is biased higher. |
| Cathode | Ground/reference side terminal | Connected to system ground or low-impedance return path; defines polarity-sensitive clamping direction for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile DO-219AB package | Height ≤1.08 mm enables use in ultra-thin modules (e.g., automotive camera PCBs) without mechanical interference. |
| 200 W peak pulse power (10/1000 μs) | Sustains repeated ESD and lightning-induced surges in industrial fieldbus nodes without degradation. |
| 178 pF junction capacitance | Preserves signal rise time in 480 Mbps USB 2.0 and 5 Mbps CAN FD links while maintaining robust clamping. |
| ±30 kV IEC 61000-4-2 ESD immunity | Eliminates need for secondary board-level ESD mitigation in consumer and automotive touch interfaces. |
| AEC-Q101 qualification | Validated for automotive under-hood and cabin applications where thermal cycling and long-term reliability are mandatory. |
Applications
| Automotive Infotainment Display Interface | Industrial RS-485 Fieldbus Node |
|---|---|
|
Use Scenario: Protecting HDMI, LVDS, or FPD-Link III differential pairs in head-unit displays from ESD events during assembly and end-user handling. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed directly at connector entry point to shunt transients before reaching serializer/deserializer ICs. Use Value: Prevents latch-up or gate oxide damage in display timing controllers by limiting voltage excursion to ≤58.1 V during ±30 kV contact discharge. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLC I/O modules exposed to cable-induced surges and operator ESD. IC Role / Device Role / Timing Role: Line-side TVS diode connected between A/B bus lines and ground to clamp common-mode transients without distorting differential signaling. Use Value: Maintains signal integrity up to 20 Mbps by limiting capacitance to 178 pF while surviving 200 W 10/1000 μs surges per IEC 61000-4-5. |
| Medical Patient Monitor Sensor Port | Automotive Body Control Module (BCM) LIN Bus |
|
Use Scenario: Shielding analog front-end inputs of ECG/SpO₂ sensor connectors from electrostatic discharge in clinical environments. IC Role / Device Role / Timing Role: Low-leakage (≤0.1 μA at 36 V) unidirectional TVS placed inline with shielded analog traces to preserve DC accuracy. Use Value: Ensures baseline stability and noise-free amplification by combining <0.1 μA IR with 58.1 V clamping - avoiding false triggers in sub-mV physiological measurements. |
Use Scenario: Protecting LIN transceiver pins in door module ECUs against battery dump and load-switch transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Stand-off-rated (36 V) TVS diode mounted between LIN bus and chassis ground to absorb negative-going spikes up to -58.1 V. Use Value: Enables reliable 19.2 kbps communication under ISO 7637-2 Pulse 1/2a/3a stress profiles due to 175 °C junction rating and AEC-Q101 validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SP3012-01UTG | Bi-directional, 12 V VRWM, 15 pF, 30 kV ESD - lower capacitance but lower voltage rating. | Targeted at high-speed USB 3.0/PCIe; unsuitable for 36 V bus protection. | Select only for <12 V signal lines requiring sub-20 pF capacitance; not a drop-in replacement for SMF36A-M3-18. |
| ON Semiconductor SZ1.5SMF36A | Same 36 V VRWM, DO-219AB package, 58.1 V VC, but rated for 1500 W (8/20 μs) vs. 1000 W. | Higher energy handling suits harsher industrial surge environments (IEC 61000-4-5 Level 4). | Drop-in compatible for designs needing extended surge margin; identical pinout and footprint. |
Compared with SP3012-01UTG and SZ1.5SMF36A, the SMF36A-M3-18 offers optimal balance of 36 V system compatibility, 178 pF capacitance for mid-speed interfaces, and AEC-Q101 qualification - making it preferred for automotive infotainment and industrial RS-485 where voltage rating and qualification outweigh ultra-low capacitance or extreme surge power needs.
Availability
SMF36A-M3-18 is available at Aetrix Electronics and suitable for automotive infotainment display interfaces, industrial RS-485 fieldbus nodes, and medical patient monitor sensor ports requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMF36A-M3-18 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets compact, high-power ESD protection in space-constrained automotive and industrial modules - engineered for AEC-Q101 compliance, low-profile mounting, and precise clamping performance across wide temperature ranges.
FAQ
What is the clamping voltage of SMF36A-M3-18 at its rated peak pulse current?
The SMF36A-M3-18 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 circuits during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMF36A-M3-18 maintains this clamping performance across its full operating temperature range (-65 °C to +175 °C).
Is SMF36A-M3-18 qualified to AEC-Q101 standards?
Yes, SMF36A-M3-18 is AEC-Q101 qualified, having passed stress tests including human body model (HBM) Class H3B (>8 kV), temperature cycling, and high-temperature operating life. This qualification confirms suitability for automotive applications such as body control modules and infotainment systems where reliability under thermal and electrical stress is mandatory. The SMF36A-M3-18 datasheet (Vishay Doc. #85881, Rev. 2.4) explicitly states AEC-Q101 qualification status.
What package type does SMF36A-M3-18 use, and is it compatible with standard SMT processes?
SMF36A-M3-18 uses the DO-219AB package (also referenced as SOD-123W-compatible), measuring 3.9 × 1.9 × 1.08 mm with a cathode bar marking. It is fully compatible with standard wave and reflow soldering processes, including peak temperatures up to 260 °C per J-STD-020 MSL Level 1 guidelines. The SMF36A-M3-18 footprint recommendation includes 1.3 mm pad width and 2.9 mm pad length for optimal thermal and mechanical reliability.
How does the junction capacitance of SMF36A-M3-18 affect high-speed signal lines?
The SMF36A-M3-18 exhibits 178 pF typical junction capacitance at 0 V and 1 MHz, which is appropriate for USB 2.0 (480 Mbps), CAN FD (5 Mbps), and RS-485 (20 Mbps) interfaces but not recommended for PCIe Gen3+ or HDMI 2.0+ where sub-2 pF is required. This capacitance introduces minimal signal distortion on mid-speed lines while preserving effective clamping - a deliberate trade-off validated in Vishay's SMF family design for automotive and industrial signal integrity. The SMF36A-M3-18 datasheet provides capacitance vs. voltage curves confirming stable behavior up to 36 V reverse bias.
Can SMF36A-M3-18 be used in bidirectional protection configurations?
No, SMF36A-M3-18 is a unidirectional ESD protection diode intended for single-polarity clamping - it conducts only when cathode voltage exceeds anode by ≥40 V. For bidirectional protection (e.g., USB D+/D- or Ethernet pairs), two SMF36A-M3-18 devices must be placed in series opposition, or a dedicated bi-directional TVS like SMF36AY-M3-18 should be selected. The SMF36A-M3-18 marking code "CP" and electrical table confirm unidirectional polarity in Vishay's official documentation.
SMF36A-M3-18 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:
- General Purpose
- Capacitance @ Frequency:
- 178pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF36A-M3-18 FAQ
1.How can I place an order for SMF36A-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF36A-M3-18 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-M3-18 reliable?
The price and inventory of SMF36A-M3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF36A-M3-18 is usually 5 days.
3.What payment methods are accepted for SMF36A-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF36A-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF36A-M3-18?
SMF36A-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF36A-M3-18 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-M3-18?
For technical support, including SMF36A-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF36A-M3-18 requirements.
6.How does Aetrix verify that SMF36A-M3-18 is sourced from the original manufacturer or authorized distributors?
All SMF36A-M3-18 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-M3-18 meets industry standards.
7.What is the process for return or replacement of SMF36A-M3-18?
All SMF36A-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF36A-M3-18, 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-M3-18 part is unused and in its original packaging.
Return procedure for SMF36A-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF36A-M3-18 Tags
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