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Vishay General Semiconductor - Diodes Division SMF36A-HM3-08
- Part No.:
- SMF36A-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF36A-HM3-08.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:3,421
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Product details
Overview
SMF36A-HM3-08 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 and power rails. It features a 36 V stand-off voltage (VRWM), 40 V minimum reverse breakdown voltage (VBR), 58.1 V maximum clamping voltage at 3.4 A peak pulse current, ±30 kV IEC 61000-4-2 ESD immunity, and 178 pF typical capacitance at 0 V.
For engineers reviewing the SMF36A-HM3-08 datasheet, SMF36A-HM3-08 pinout, SMF36A-HM3-08 application, or SMF36A-HM3-08 equivalent, this device is selected for robust electrostatic discharge protection in automotive infotainment interfaces, USB 2.0 signal lines, and industrial sensor I/O where low clamping voltage and sub-200 pF capacitance are critical to signal integrity.
Technical Context
The SMF36A-HM3-08 operates as a single-channel unidirectional TVS diode with avalanche breakdown behavior, optimized for fast response (<1 ns) to ESD transients per IEC 61000-4-2. Its DO-219AB package supports wave and reflow soldering, with MSL level 1 moisture sensitivity and peak reflow temperature up to 260 °C.
It delivers 200 W peak pulse power (10/1000 μs waveform) and 1000 W (8/20 μs per IEC 61000-4-5), with thermal resistance RthJA of 180 K/W on standard epoxy-glass PCBs. The device meets AEC-Q101 qualification for automotive-grade reliability, including H3B-class human body model ESD (>8 kV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 36 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold. |
| Reverse Breakdown (VBR) | 40–44.3 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| Clamping Voltage (VC) | 58.1 V at 3.4 A (10/1000 μs) - Peak 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 (480 Mbps) and CAN FD signal paths without signal degradation. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Full compliance with Level 4 system-level ESD testing requirements. |
| Peak Pulse Power | 200 W (10/1000 μs), 1000 W (8/20 μs) - Sustains high-energy surges from lightning-induced or inductive switching transients. |
| Operating Temp Range | −65 °C to +175 °C - Supports under-hood automotive and industrial environments without derating. |
Pinout & Package
SMF36A-HM3-08 uses the DO-219AB (SMF) package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, cathode-bar marked, SOD-123W-compatible footprint. Mold compound rated UL 94 V-0; terminals tin-plated, lead (Pb)-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to signal or power line requiring protection; referenced to ground via cathode path during clamping. |
| Cathode | Ground reference | Connected to system ground plane; provides low-impedance path for surge current during avalanche conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping voltage | 58.1 V at 3.4 A enables protection of 3.3 V and 5 V logic without overvoltage damage to interface ICs. |
| "Low Noise" fast response | <1 ns rise time ensures clamping activation before ESD energy couples into sensitive circuitry. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment, body control modules, and ADAS sensor interfaces. |
| Reflow/wave solder compatible | Rated for peak reflow temperatures up to 260 °C, supporting automated assembly in high-volume manufacturing. |
| MSL level 1 handling | No dry-pack or baking required prior to assembly-reduces production overhead and moisture-related defects. |
Applications
| Automotive Infotainment Display Interface | Industrial RS-485 Sensor Bus |
|---|---|
Use Scenario: Protecting LVDS or FPD-Link III video data lines between head unit and TFT display against ESD during service or cable insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed inline on differential pairs, grounded at chassis via short trace to minimize loop inductance. Use Value: 178 pF capacitance avoids skew or attenuation in >100 MHz video signals; 58.1 V clamping prevents latch-up in display timing controllers. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation nodes exposed to ESD from operator touch or relay switching noise. IC Role / Device Role / Timing Role: Bidirectional protection not required-unidirectional SMF36A-HM3-08 used on VCC rail and receiver inputs where ground-referenced surges dominate. Use Value: −65 °C to +175 °C operation ensures reliability across warehouse temperature swings; 200 W pulse rating handles repetitive motor drive noise. |
| USB 2.0 Host Port Protection | Automotive LIN Bus Node |
Use Scenario: Clamping ESD on D+ and D− lines of automotive USB host ports (e.g., center console), where space constraints demand ultra-low-profile devices. IC Role / Device Role / Timing Role: One SMF36A-HM3-08 per line, anode-to-signal, cathode-to-ground, placed immediately at connector entry point. Use Value: DO-219AB footprint (3.9 mm × 1.9 mm) fits tight USB Type-A port layouts; 178 pF preserves eye diagram integrity at 480 Mbps. |
Use Scenario: Protecting LIN transceiver inputs in door module ECUs subjected to ESD from window switch actuation or static discharge from occupants. IC Role / Device Role / Timing Role: Unidirectional clamp on LIN bus line, referenced to vehicle ground, with VRWM = 36 V exceeding 12 V nominal and 18 V load-dump margins. Use Value: 40 V VBR ensures no conduction during normal operation; ±30 kV ESD rating exceeds ISO 10605 requirements for interior modules. |
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 × 2.5 mm × 1.5 mm; higher RthJA (200 K/W); 60 V VC at 3.2 A. | Larger footprint; less suitable for dense USB or FPD-Link layouts; better for higher-power 8/20 μs surges due to larger junction area. | Select SMAJ36A-E3/57T when board space allows and thermal dissipation on larger copper pours is available. |
| TPD2E001DRYR | 2-channel, 0.65 mm × 0.65 mm DSBGA; 12 pF capacitance; 12 V VRWM; not AEC-Q101 qualified. | Designed for ultra-high-speed digital interfaces (e.g., HDMI, PCIe); insufficient VRWM for 12 V/24 V automotive rails. | Choose TPD2E001DRYR only for low-voltage, high-frequency data lines-not for power rail or LIN/RS-485 protection. |
Compared with SMAJ36A-E3/57T and TPD2E001DRYR, SMF36A-HM3-08 uniquely balances compact DO-219AB size, automotive qualification, 36 V VRWM headroom, and 178 pF capacitance-making it optimal for space-constrained, high-reliability 12 V system interfaces where both ESD robustness and signal fidelity matter.
Availability
SMF36A-HM3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and USB 2.0 host ports requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant ESD protection.
Supply support for SMF36A-HM3-08 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, space-constrained ESD protection in automotive and industrial electronics, emphasizing low capacitance, AEC-Q101 qualification, and compatibility with modern SMT assembly processes.
FAQ
What is the maximum clamping voltage of the SMF36A-HM3-08 under standard test conditions?
The SMF36A-HM3-08 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 protected circuitry during transient events. The clamping performance is guaranteed across the full operating temperature range of −65 °C to +175 °C, making SMF36A-HM3-08 suitable for under-hood automotive use.
Is SMF36A-HM3-08 qualified for automotive applications?
Yes, SMF36A-HM3-08 is AEC-Q101 qualified and rated for H3B-class human body model ESD (>8 kV). It meets stringent automotive reliability requirements including temperature cycling, humidity bias, and mechanical shock testing. The device's −65 °C to +175 °C operating range and DO-219AB package robustness make SMF36A-HM3-08 appropriate for engine control units, body electronics, and infotainment systems.
What is the capacitance of SMF36A-HM3-08 and how does it affect high-speed signal lines?
SMF36A-HM3-08 exhibits 178 pF typical capacitance at 0 V and 1 MHz. This value is low enough to avoid signal integrity issues on USB 2.0 (480 Mbps), LIN, and RS-485 buses, where excessive capacitance can cause rise-time degradation or reflection. For higher-speed interfaces like USB 3.0 or HDMI, lower-capacitance alternatives would be required-but SMF36A-HM3-08 remains optimal for cost-sensitive, robust 12 V system protection.
Does SMF36A-HM3-08 support automated PCB assembly processes?
Yes, SMF36A-HM3-08 is fully compatible with both wave and reflow soldering. Its DO-219AB package is rated for peak reflow temperatures up to 260 °C and classified as MSL level 1, meaning it can be stored indefinitely at ambient conditions without baking. The cathode-bar marking and standardized tape-and-reel packaging (3K per 7″ reel, code "08") ensure reliable pick-and-place placement in high-volume SMT lines.
How does the stand-off voltage (VRWM) of SMF36A-HM3-08 relate to its use in 12 V automotive systems?
The SMF36A-HM3-08 has a 36 V stand-off voltage (VRWM), providing ample margin above nominal 12 V and transient conditions such as load dump (up to 27 V per ISO 7637-2). This ensures the diode remains non-conductive during normal operation and only activates during ESD or surge events exceeding 40 V (VBR min). That margin makes SMF36A-HM3-08 ideal for protecting 12 V power rails and signal lines in automotive modules without false triggering.
SMF36A-HM3-08 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-HM3-08 FAQ
1.How can I place an order for SMF36A-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF36A-HM3-08 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-HM3-08 reliable?
The price and inventory of SMF36A-HM3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF36A-HM3-08 is usually 5 days.
3.What payment methods are accepted for SMF36A-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF36A-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF36A-HM3-08?
SMF36A-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF36A-HM3-08 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-HM3-08?
For technical support, including SMF36A-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF36A-HM3-08 requirements.
6.How does Aetrix verify that SMF36A-HM3-08 is sourced from the original manufacturer or authorized distributors?
All SMF36A-HM3-08 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-HM3-08 meets industry standards.
7.What is the process for return or replacement of SMF36A-HM3-08?
All SMF36A-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF36A-HM3-08, 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-HM3-08 part is unused and in its original packaging.
Return procedure for SMF36A-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF36A-HM3-08 Tags
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