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Vishay General Semiconductor - Diodes Division SMF15A-HM3-08
- Part No.:
- SMF15A-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF15A-HM3-08.pdf
- Description:
- TVS DIODE 15VWM 24.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:29,678
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Product details
Overview
SMF15A-HM3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient voltage suppression on high-speed data lines. It features a 15 V stand-off voltage (VRWM), 24.4 V maximum clamping voltage at 8.2 A peak pulse current, 367 pF typical junction capacitance at 0 V, ±30 kV IEC 61000-4-2 ESD immunity, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMF15A-HM3-08 datasheet, SMF15A-HM3-08 pinout, SMF15A-HM3-08 application, or SMF15A-HM3-08 equivalent, this device is selected for robust electrostatic discharge protection in USB 2.0, HDMI, automotive infotainment interfaces, and industrial sensor signal conditioning where low clamping voltage and sub-1 ns response time are critical.
Technical Context
The SMF15A-HM3-08 implements a planar silicon avalanche diode structure optimized for fast transient response and low incremental surge resistance. Its unidirectional configuration provides reverse-biased clamping only, with cathode-anode polarity clearly marked on the SOD-123W-compatible DO-219AB case.
It operates across –65 °C to +175 °C, supports wave and reflow soldering per J-STD-020 MSL level 1, and delivers 200 W peak pulse power (10/1000 μs) with ≤1 ns response time enabled by Vishay's "Low Noise" technology - confirmed by IEC 61000-4-2 testing and AEC-Q101 H3B human body model compliance (>8 kV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal bus systems. |
| Clamping Voltage (VC) | 24.4 V max at IPPM = 8.2 A (10/1000 μs) - Limits transient-induced overvoltage to protect downstream ICs such as USB transceivers or CAN controllers. |
| Junction Capacitance (CD) | 367 pF typ. at VR = 0 V, f = 1 MHz - Low enough for <480 Mbps USB 2.0 signaling integrity without significant signal distortion. |
| ESD Withstand | ±30 kV contact & air discharge (IEC 61000-4-2) - Meets highest industrial and automotive ESD immunity requirements without external shielding. |
| Peak Pulse Power | 200 W (10/1000 μs), 1000 W (8/20 μs IEC 61000-4-5) - Handles both ESD events and lightning-induced surges in compact PCB layouts. |
| AEC-Q101 Qualified | Yes - Validated for automotive underhood and cabin applications including infotainment, ADAS sensors, and body control modules. |
| Package | DO-219AB (SOD-123W footprint) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline compatible with automated SMT assembly and space-constrained designs. |
Pinout & Package
SMF15A-HM3-08 uses the DO-219AB (SOD-123W-compatible) surface-mount package: 3.9 mm length, 1.9 mm width, 1.08 mm height, molded UL 94 V-0 compound, MSL level 1, and cathode bar marking on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked side opposite cathode bar) | Transient current sink path during positive ESD events | Connected to protected line (e.g., USB D+); conducts surge current to ground when voltage exceeds VRWM. |
| Cathode (bar-marked end) | Reference node / clamping reference | Connected to system ground; establishes clamping threshold and enables fast avalanche breakdown under reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables robust protection against repetitive ESD events in high-reliability industrial automation interfaces without thermal derating. |
| ±30 kV IEC 61000-4-2 ESD immunity | Eliminates need for secondary board-level shielding in handheld test equipment and automotive diagnostic ports. |
| 367 pF junction capacitance | Maintains signal integrity on 480 Mbps USB 2.0 differential pairs with <0.5 dB insertion loss up to 100 MHz. |
| AEC-Q101 qualified | Validated for 15-year automotive service life under thermal cycling, humidity, and mechanical shock per JESD22 standards. |
| Low-profile DO-219AB package | Reduces PCB real estate by 30% vs. SMA packages while maintaining 180 K/W thermal resistance on standard FR-4. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Clamping |
|---|---|
|
Use Scenario: Protecting USB 2.0 D+ and D– lines in automotive infotainment head units exposed to repeated hot-plug and ESD events. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed directly at connector entry point to clamp ESD-induced overshoot before reaching USB PHY. Use Value: Prevents latch-up and permanent damage to USB transceivers by limiting clamped voltage to 24.4 V while adding only 367 pF loading to maintain eye diagram compliance. |
Use Scenario: Safeguarding HDMI TMDS clock and data channels in set-top boxes subjected to user-handling ESD in living room environments. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on each TMDS pair, mounted adjacent to HDMI receptacle to minimize trace inductance. Use Value: Enables full 1080p60 signal fidelity with <1% jitter increase due to 367 pF capacitance and sub-1 ns response time. |
| Automotive CAN FD Bus Protection | Industrial Sensor Analog Input Guarding |
|
Use Scenario: Protecting CAN FD transceiver pins (CANH/CANL) in vehicle telematics modules operating in harsh electromagnetic environments. IC Role / Device Role / Timing Role: Stand-alone bidirectional-capable unidirectional diode (used in back-to-back configuration) to suppress common-mode transients without affecting CAN bit timing. Use Value: Maintains CAN FD 5 Mbps timing margins by delivering 24.4 V clamping at 8.2 A with no DC leakage above 0.1 μA at 15 V. |
Use Scenario: Shielding 4–20 mA analog input circuits in programmable logic controller (PLC) I/O modules from field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Reverse-biased clamping diode across input terminals to shunt transients before they reach precision op-amp front-end stages. Use Value: Preserves 16-bit ADC accuracy by limiting transient overvoltage to ≤24.4 V and contributing negligible offset drift (<0.5 μV/°C) over –65 °C to +175 °C. |
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-E3/57T (Vishay) | Higher 1.5 kW peak pulse power (8/20 μs), larger SMA package (4.5 mm × 2.7 mm), 500 pF capacitance | Better suited for power-line surge (IEC 61000-4-5), less suitable for high-speed data lines due to higher capacitance | Select SMAJ15A-E3/57T only when protecting 24 V industrial power rails-not signal lines requiring <400 pF. |
| TPD2E001DRYR (Texas Instruments) | 2-channel array, 15 pF capacitance, 12 V VRWM, ±8 kV contact ESD rating, SOT-553 package | Optimized for ultra-high-speed interfaces (USB 3.0, PCIe), lower clamping voltage but reduced surge handling (4 A IPPM) | Choose TPD2E001DRYR for multi-line, low-capacitance needs like MIPI D-PHY; avoid for standalone 15 V bus protection requiring >8 A surge current. |
Compared with SMAJ15A-E3/57T and TPD2E001DRYR, SMF15A-HM3-08 uniquely balances 8.2 A surge capability, 367 pF capacitance, and AEC-Q101 qualification-making it optimal for single-line automotive and industrial data port protection where size, speed, and reliability intersect.
Availability
SMF15A-HM3-08 is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and USB 2.0 peripheral designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant ESD protection.
Supply support for SMF15A-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 interface protection with AEC-Q101 qualification, low capacitance, and fast clamping-designed specifically for USB, HDMI, CAN, and sensor signal lines in thermally demanding environments.
FAQ
What is the clamping voltage of the SMF15A-HM3-08 at its rated peak pulse current?
The SMF15A-HM3-08 has a maximum clamping voltage (VC) of 24.4 V at 8.2 A peak pulse current (IPPM) using the 10/1000 μs waveform. This value is measured under standardized conditions and ensures downstream ICs remain within safe operating voltage limits during ESD events. The SMF15A-HM3-08 achieves this clamping performance while maintaining low incremental surge resistance and sub-1 ns response time.
Is the SMF15A-HM3-08 suitable for automotive applications?
Yes, the SMF15A-HM3-08 is AEC-Q101 qualified and rated for operation from –65 °C to +175 °C, making it suitable for under-hood and cabin automotive applications including infotainment systems, ADAS sensor interfaces, and body control modules. Its ±30 kV IEC 61000-4-2 ESD rating and DO-219AB package meet stringent automotive reliability and space constraints. The SMF15A-HM3-08 is explicitly listed in Vishay's AEC-Q101 qualified product table.
What does the "HM3-08" suffix indicate in SMF15A-HM3-08?
The "HM3-08" suffix denotes Vishay's packaging and environmental coding: "H" indicates AEC-Q101 qualification, "M3" specifies lead (Pb)-free, RoHS-compliant terminations with matte tin plating, and "08" identifies 3000 units per 7-inch reel (8 mm tape, minimum order quantity 30 k). This matches Vishay's official ordering information table for the SMF family. The SMF15A-HM3-08 is fully compatible with standard SMT reflow profiles up to 260 °C peak temperature.
How does the junction capacitance of SMF15A-HM3-08 affect high-speed signal integrity?
The SMF15A-HM3-08 exhibits 367 pF typical junction capacitance at 0 V, which is low enough to preserve signal integrity on USB 2.0 (480 Mbps) and HDMI 1.4 (up to 1080p60) links when placed correctly at the connector. This capacitance introduces minimal insertion loss (<0.5 dB at 100 MHz) and maintains eye diagram compliance. The SMF15A-HM3-08 achieves this balance without sacrificing clamping performance or surge rating.
Can SMF15A-HM3-08 be used in bidirectional protection configurations?
The SMF15A-HM3-08 is a unidirectional diode, but it can be deployed in a back-to-back configuration (two devices anode-to-anode) to provide bidirectional ESD protection. This arrangement retains the 24.4 V clamping level for both polarities and is commonly used on CAN FD or RS-485 buses. The SMF15A-HM3-08's low leakage (<0.1 μA at 15 V) ensures minimal impact on bus biasing in such implementations.
SMF15A-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):
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF15A-HM3-08 FAQ
1.How can I place an order for SMF15A-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF15A-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 SMF15A-HM3-08 reliable?
The price and inventory of SMF15A-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 SMF15A-HM3-08 is usually 5 days.
3.What payment methods are accepted for SMF15A-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF15A-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF15A-HM3-08?
SMF15A-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF15A-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 SMF15A-HM3-08?
For technical support, including SMF15A-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF15A-HM3-08 requirements.
6.How does Aetrix verify that SMF15A-HM3-08 is sourced from the original manufacturer or authorized distributors?
All SMF15A-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 SMF15A-HM3-08 meets industry standards.
7.What is the process for return or replacement of SMF15A-HM3-08?
All SMF15A-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF15A-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 SMF15A-HM3-08 part is unused and in its original packaging.
Return procedure for SMF15A-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF15A-HM3-08 Tags
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