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Vishay SMF15A-HM3_A18
- Part No.:
- SMF15A-HM3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF15A-HM3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,137
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Product details
Overview
SMF15A-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 15 V standoff voltage (VRWM), 24.4 V maximum clamping voltage at 8.2 A peak pulse current, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF15A-HM3_A18 datasheet, SMF15A-HM3_A18 pinout, SMF15A-HM3_A18 application, or SMF15A-HM3_A18 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low capacitance (367 pF at 0 V), AEC-Q101 qualification status, and SOD-123W-compatible footprint compatibility for automotive-grade board layout.
Technical Context
This device operates as a single-channel unidirectional TVS diode with avalanche breakdown behavior, optimized for fast response (<1 ns) to electrostatic discharge events. Its junction temperature range spans –65 °C to +175 °C, and it delivers 200 W peak pulse power per the 10/1000 μs waveform standard.
The SMF15A-HM3_A18 uses silicon planar technology with low incremental surge resistance to ensure stable clamping across repeated transients. It is rated for 0.01 % duty cycle repetition and supports wave/reflow soldering per J-STD-020 MSL level 1 conditions up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 15 V - maximum continuous reverse operating voltage before conduction begins |
| Clamping Voltage (VC) | 24.4 V at 8.2 A IPPM - limits downstream IC voltage during 10/1000 μs surge |
| Peak Pulse Power (PPP) | 200 W (10/1000 μs) - defines transient energy handling capability per pulse |
| Capacitance (CD) | 367 pF at 0 V, 1 MHz - impacts signal integrity on high-speed lines like USB or CAN |
| ESD Rating | ±30 kV contact/air per IEC 61000-4-2 - exceeds Level 4 system-level ESD immunity requirements |
| Operating Temp Range | –65 °C to +175 °C - supports under-hood automotive and industrial ambient environments |
| Package | DO-219AB (SOD-123W compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile footprint |
Pinout & Package
SMF15A-HM3_A18 is housed in the DO-219AB (SMF) package: a surface-mount, low-profile, cathode-marked case with 2 terminals. Dimensions are 3.9 mm length × 1.9 mm width × 1.08 mm height; recommended footprint includes 2.9 mm pad length and 1.4 mm pad width per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-marked end) | Input/line side connection | Connected to protected signal line; conducts during positive transients relative to cathode |
| Cathode (bar-marked end) | Ground/reference return path | Connected to system ground or low-impedance return; defines unidirectional clamping polarity |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise fast-response technology | Sub-nanosecond response time enables effective suppression of ESD pulses before IC damage occurs |
| AEC-Q101 qualified variant available | This specific part number (HM3_A18 suffix) denotes AEC-Q101 qualified version for automotive applications |
| Reflow/wave solder compatible | Rated for peak reflow temperatures up to 260 °C (MSL level 1), supporting automated PCB assembly |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meets safety standards for enclosed industrial and automotive enclosures |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable USB peripherals against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and chassis ground to clamp transients without loading DC bias. Use Value: 367 pF capacitance avoids signal rise-time degradation while maintaining <24.4 V clamping at 8.2 A surge. | Use Scenario: Safeguarding TMDS clock and data channels in set-top boxes and displays exposed to user-handling ESD. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor on each high-speed channel, referenced to local ground plane. Use Value: ±30 kV IEC 61000-4-2 rating ensures compliance with IEC 61000-6-2 immunity requirements for multimedia equipment. |
| Automotive Sensor Interface | Industrial RS-485 Transceiver Port |
Use Scenario: ESD protection for LIN bus or analog sensor outputs in engine control modules operating at elevated ambient temperatures. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on signal lines entering AEC-Q101-compliant ECUs. Use Value: –65 °C to +175 °C operating range and AEC-Q101 qualification support under-hood deployment without derating. | Use Scenario: Shielding RS-485 transceiver inputs/outputs in factory automation gateways connected to long cable runs. IC Role / Device Role / Timing Role: Bidirectional-capable protection via unidirectional placement on each line with common ground reference. Use Value: 200 W peak pulse power rating handles induced surges from nearby motor switching or lightning-induced coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/5A | Higher clamping voltage (26.9 V), larger SMA package (4.5 mm × 2.7 mm), 400 W PPP (10/1000 μs) | Less suitable for space-constrained layouts; better for higher-energy surge environments | Select when board area allows larger footprint and higher surge margin is prioritized over capacitance |
| TPD2E001DRYR | 2-channel, 15 pF per line, 12 V VRWM, not AEC-Q101 qualified, SC-70 package | Designed for ultra-low-capacitance USB/MIPI protection; lacks automotive qualification and high-power rating | Choose only for low-speed digital interfaces where sub-20 pF capacitance is mandatory and automotive use is excluded |
Compared with SMAJ15A-E3/5A and TPD2E001DRYR, SMF15A-HM3_A18 offers optimal balance of compact DO-219AB size, 367 pF capacitance, AEC-Q101 qualification, and 24.4 V clamping - making it preferred for automotive infotainment and industrial I/O where footprint, reliability, and moderate-speed signal integrity are jointly critical.
Availability
SMF15A-HM3_A18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial fieldbus nodes, and consumer HDMI interface designs requiring stable component supply across extended production lifecycles.
Supply support for SMF15A-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets robust, surface-mount ESD protection for high-speed and harsh-environment applications - engineered specifically for AEC-Q101 compliance, low-clamp performance, and manufacturable SMT integration.
FAQ
What is the clamping voltage specification for SMF15A-HM3_A18 under standard test conditions?
The SMF15A-HM3_A18 has a maximum reverse clamping voltage (VC) of 24.4 V when subjected to an 8.2 A peak pulse current with a 10/1000 μs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuits during transient events, ensuring downstream ICs remain within safe operating voltage margins.
Is SMF15A-HM3_A18 qualified to AEC-Q101 for automotive use?
Yes, SMF15A-HM3_A18 is AEC-Q101 qualified. The "HM3" prefix in the part number explicitly denotes Vishay's AEC-Q101-compliant variant, validated for automotive applications including engine control units, body electronics, and infotainment systems operating across –65 °C to +175 °C.
What package type does SMF15A-HM3_A18 use, and is it compatible with standard SMT processes?
SMF15A-HM3_A18 uses the DO-219AB (SMF) package - a low-profile surface-mount outline measuring 3.9 mm × 1.9 mm × 1.08 mm. It is fully compatible with standard reflow and wave soldering per J-STD-020 MSL level 1, with peak temperature tolerance up to 260 °C, enabling seamless integration into automated PCB assembly lines.
How does the 367 pF capacitance of SMF15A-HM3_A18 affect its suitability for high-speed interfaces?
The 367 pF typical capacitance of SMF15A-HM3_A18 at 0 V and 1 MHz makes it appropriate for USB 2.0 (480 Mbps) and HDMI 1.4 (up to 3.4 Gbps) signal lines where moderate bandwidth preservation is acceptable. While not suited for PCIe or USB 3.x, its capacitance is intentionally balanced against clamping performance and surge robustness for cost-sensitive, high-reliability applications.
Can SMF15A-HM3_A18 be used in bidirectional signal protection configurations?
No - SMF15A-HM3_A18 is a unidirectional TVS diode, intended for protection of signals referenced to ground with defined polarity. For true bidirectional protection (e.g., RS-485), two SMF15A-HM3_A18 devices may be placed in series opposition, or a dedicated bidirectional part such as SMBJ15CA should be selected instead.
SMF15A-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 8.2A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 367pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF15A-HM3_A18 FAQ
1.How can I place an order for SMF15A-HM3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF15A-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 SMF15A-HM3_A18 reliable?
The price and inventory of SMF15A-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 SMF15A-HM3_A18 is usually 5 days.
3.What payment methods are accepted for SMF15A-HM3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF15A-HM3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF15A-HM3_A18?
SMF15A-HM3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF15A-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 SMF15A-HM3_A18?
For technical support, including SMF15A-HM3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF15A-HM3_A18 requirements.
6.How does Aetrix verify that SMF15A-HM3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF15A-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 SMF15A-HM3_A18 meets industry standards.
7.What is the process for return or replacement of SMF15A-HM3_A18?
All SMF15A-HM3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF15A-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 SMF15A-HM3_A18 part is unused and in its original packaging.
Return procedure for SMF15A-HM3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF15A-HM3_A18 Tags
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