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Vishay SMF36A-HM3_A18
- Part No.:
- SMF36A-HM3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF36A-HM3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,630
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Product details
Overview
SMF36A-HM3_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 (VBR), 58.1 V maximum clamping voltage at 3.4 A peak pulse current (IPPM), ±30 kV IEC 61000-4-2 ESD immunity, and 178 pF typical capacitance at 0 V.
For engineers reviewing the SMF36A-HM3_A18 datasheet, SMF36A-HM3_A18 pinout, SMF36A-HM3_A18 application, or SMF36A-HM3_A18 equivalent, this device is selected for robust electrostatic discharge protection in automotive infotainment interfaces, USB 2.0 ports, and industrial sensor signal conditioning where low clamping voltage and sub-200 pF capacitance are critical to signal integrity.
Technical Context
This diode operates as a single-channel unidirectional TVS device with cathode-anode polarity, leveraging silicon avalanche technology to clamp transients above its breakdown threshold. Its 10/1000 μs waveform rating of 200 W peak pulse power and 1000 W rating under 8/20 μs IEC 61000-4-5 surges enables protection against both ESD and lightning-induced surges.
The SMF36A-HM3_A18 is qualified to AEC-Q101, supports wave and reflow soldering per J-STD-020 MSL level 1, and exhibits low incremental surge resistance for tight voltage clamping during fast-rising transients - key for preserving signal fidelity in 480 Mbps USB 2.0 and CAN FD data paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 36 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below breakdown. |
| Reverse Breakdown (VBR) | 40–44.3 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system supply rails. |
| Clamping Voltage (VC) | 58.1 V at 3.4 A (10/1000 μs) - Actual voltage seen by protected circuit during surge; limits stress on downstream ICs. |
| Capacitance (CD) | 178 pF at 0 V, 1 MHz - Low enough for USB 2.0 full-speed operation without signal degradation or eye-diagram closure. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Meets highest industrial and automotive ESD immunity requirements. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 × 1.9 × 1.08 mm low-profile outline enabling dense PCB layouts and automated assembly. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per AEC-Q101 Rev G. |
Pinout & Package
SMF36A-HM3_A18 uses the DO-219AB (SMF) package: a two-terminal, surface-mount, low-profile case with cathode marked by a bar on the body. The device has no internal connections beyond anode and cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to signal line or power rail requiring protection; conducts during reverse-biased transient events. |
| Cathode | Ground-reference terminal | Connected to system ground or low-impedance return path; establishes reference for clamping action and ESD current diversion. |
Key Features
| Feature | Design Value |
|---|---|
| "Low Noise" fast-response technology | Sub-nanosecond response time enables clamping before ESD pulse energy couples into sensitive IC inputs. |
| 200 W peak pulse power (10/1000 μs) | Sustains repeated low-duty-cycle surges without degradation - suitable for field-deployed industrial equipment. |
| Reflow/wave solder compatible | Rated for peak temperatures up to 260 °C, supporting standard Pb-free SMT processes without delamination or parameter shift. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulant meets flame-retardancy requirements for automotive and industrial end-equipment certifications. |
| MSL level 1 moisture sensitivity | No dry-pack or baking required prior to assembly - simplifies manufacturing logistics and reduces handling cost. |
Applications
| Automotive Infotainment Display Interface | Industrial RS-485 Communication Port |
|---|---|
|
Use Scenario: Protecting LVDS or FPD-Link III video data lines between head unit and display panel in vehicles exposed to ESD during service or environmental charging. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed inline on differential pairs to shunt ESD transients to chassis ground while maintaining signal integrity. Use Value: 178 pF capacitance avoids skew or jitter in >100 MHz pixel clock signals; ±30 kV ESD rating exceeds ISO 10605 requirements for automotive interiors. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs connected to long cable runs subject to induced surges and operator ESD. IC Role / Device Role / Timing Role: Standoff-clamp TVS on A/B bus lines to limit common-mode transients before they reach transceiver input stages. Use Value: 58.1 V clamping voltage ensures protected transceiver remains within absolute maximum ratings even during 4-kV surge events per IEC 61000-4-4. |
| USB 2.0 Full-Speed Peripheral Port | Automotive CAN FD Node Protection |
|
Use Scenario: ESD protection for D+ and D− lines on USB 2.0 ports in medical handheld devices, where compact size and low capacitance are mandatory. IC Role / Device Role / Timing Role: Bidirectionally configured pair (two SMF36A-HM3_A18 devices) across differential data lines to suppress ±30 kV contact discharges. Use Value: 3.9 mm length and 1.9 mm width enable placement directly at USB connector footprint; 178 pF prevents bit error rate increase at 480 Mbps. |
Use Scenario: Transient suppression on CAN_H and CAN_L lines in ADAS domain controllers subjected to load dump and ESD in vehicle harnesses. IC Role / Device Role / Timing Role: Unidirectional TVS on each CAN line referenced to ground, providing asymmetric clamping aligned with CAN bus voltage swing. Use Value: 36 V VRWM accommodates CAN FD's extended common-mode range (±35 V); AEC-Q101 qualification ensures operation from −65 °C to +175 °C junction temperature. |
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 | DO-214AC (SMA) package; 3.5 mm height vs. SMF's 1.08 mm; 200 W same rating but higher thermal resistance (RthJA = 40°C/W vs. 180 K/W). | Less suitable for ultra-thin consumer electronics; better for high-power industrial boards with larger copper areas. | Select SMAJ36A-E3/57T when board space allows taller profile and higher surge repetition is needed with heatsinking. |
| TPD2E007DRYR | Quad-channel, bidirectional, 5.5 V VRWM; 10 pF capacitance; integrated ESD array in USON-6; not AEC-Q101 qualified. | Designed for low-voltage digital I/O (e.g., I²C, GPIO), not 36 V bus protection; unsuitable for CAN or RS-485. | Choose TPD2E007DRYR only for sub-6 V logic-level interfaces where ultra-low capacitance outweighs voltage rating and qualification needs. |
Compared with SMAJ36A-E3/57T and TPD2E007DRYR, SMF36A-HM3_A18 uniquely balances 36 V standoff, automotive qualification, ultra-low profile, and proven 178 pF performance for mid-voltage serial buses - making it the preferred choice for space-constrained, high-reliability ESD protection where voltage rating and qualification are non-negotiable.
Availability
SMF36A-HM3_A18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and USB 2.0 peripheral designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for SMF36A-HM3_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 power management, sensing, and protection components with emphasis on reliability, efficiency, and miniaturization.
The SMF series targets high-density, high-reliability ESD protection for automotive, industrial, and computing applications - engineered specifically for low-profile mounting, AEC-Q101 compliance, and precise clamping in fast data interfaces.
FAQ
What is the maximum clamping voltage of the SMF36A-HM3_A18 under standard test conditions?
The SMF36A-HM3_A18 has a maximum reverse 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 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMF36A-HM3_A18 maintains this clamping performance across its qualified temperature range and after repeated stress cycles.
Is the SMF36A-HM3_A18 suitable for protecting USB 2.0 data lines?
Yes, the SMF36A-HM3_A18 is suitable for USB 2.0 full-speed (480 Mbps) data line protection when used in a dual-diode configuration (one per D+ and D− line). Its 178 pF capacitance at 0 V and 1 MHz introduces negligible signal distortion, and its ±30 kV IEC 61000-4-2 rating exceeds USB-IF ESD requirements. The SMF36A-HM3_A18 must be placed adjacent to the connector with short, symmetric traces to preserve differential impedance.
Does the SMF36A-HM3_A18 meet AEC-Q101 qualification standards?
Yes, the SMF36A-HM3_A18 is explicitly AEC-Q101 qualified per Rev G, covering stress tests including HTGB, HTRB, temperature cycling, and ESD. This qualification confirms suitability for automotive applications such as infotainment, ADAS, and body electronics. The SMF36A-HM3_A18 data sheet (Document Number: 85881, Rev. 2.4) lists AEC-Q101 compliance in the Features section and Package Data table.
What is the package type and dimensions of the SMF36A-HM3_A18?
The SMF36A-HM3_A18 uses the DO-219AB (SMF) package: 3.9 mm length × 1.9 mm width × 1.08 mm height, with cathode indicated by a bar marking. Its footprint matches SOD-123W and is compatible with standard 8 mm tape-and-reel packaging (10K per 13″ reel, code _A18). The SMF36A-HM3_A18's low profile supports high-density routing in thin-form-factor modules.
How does the SMF36A-HM3_A18 compare to lower-voltage variants like SMF12A in terms of application scope?
The SMF36A-HM3_A18 is rated for 36 V stand-off and 40–44.3 V breakdown, making it appropriate for 24 V and 32 V automotive and industrial buses, whereas SMF12A (12 V VRWM) suits 5 V or 12 V logic interfaces. Their clamping voltages, capacitance, and surge ratings scale accordingly - the SMF36A-HM3_A18's 58.1 V VC protects higher-voltage transceivers like ISO1176, while SMF12A's 19.9 V VC fits RS-232 or MCU GPIO. The SMF36A-HM3_A18 is not interchangeable with SMF12A without redesigning voltage margins.
SMF36A-HM3_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-HM3_A18 FAQ
1.How can I place an order for SMF36A-HM3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF36A-HM3_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-HM3_A18 reliable?
The price and inventory of SMF36A-HM3_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-HM3_A18 is usually 5 days.
3.What payment methods are accepted for SMF36A-HM3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF36A-HM3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF36A-HM3_A18?
SMF36A-HM3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF36A-HM3_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-HM3_A18?
For technical support, including SMF36A-HM3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF36A-HM3_A18 requirements.
6.How does Aetrix verify that SMF36A-HM3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF36A-HM3_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-HM3_A18 meets industry standards.
7.What is the process for return or replacement of SMF36A-HM3_A18?
All SMF36A-HM3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF36A-HM3_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-HM3_A18 part is unused and in its original packaging.
Return procedure for SMF36A-HM3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF36A-HM3_A18 Tags
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