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Vishay SMF15A-HE3_A08
- Part No.:
- SMF15A-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF15A-HE3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,440
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Product details
Overview
SMF15A-HE3_A08 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, 367 pF typical capacitance at 0 V, ±30 kV IEC 61000-4-2 ESD immunity, and 200 W peak pulse power (10/1000 μs).
For engineers reviewing the SMF15A-HE3_A08 datasheet, SMF15A-HE3_A08 pinout, SMF15A-HE3_A08 application, or SMF15A-HE3_A08 equivalent, this device is selected for robust electrostatic discharge protection in USB 2.0, HDMI, and industrial sensor interfaces where low capacitance and fast response are critical.
Technical Context
The SMF15A-HE3_A08 operates as a unidirectional TVS diode with avalanche breakdown behavior, optimized for clamping transients before downstream ICs sustain damage. Its low incremental surge resistance ensures minimal voltage overshoot during fast-rising ESD events, while its "Low Noise" technology delivers sub-nanosecond response time.
It is rated for operation across -65 °C to +175 °C, qualified to AEC-Q101 for automotive-grade reliability, and compatible with standard SOD-123W/SOD-123F footprint layouts. The device uses silicon planar construction and is RoHS-compliant with lead-free tin terminations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line. |
| Clamping Voltage (VC) | 24.4 V max at IPPM = 8.2 A - Peak voltage seen by protected circuit during 10/1000 μs surge; limits stress on downstream ICs. |
| Capacitance (CD) | 367 pF typ at 0 V, 1 MHz - Low enough for USB 2.0 (480 Mbps) and HDMI 1.4 signal integrity without excessive attenuation. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Meets highest industrial and automotive ESD immunity requirements. |
| Peak Pulse Power | 200 W (10/1000 μs) - Sustains short-duration surges common in board-level ESD events without degradation. |
| Operating Temp Range | -65 °C to +175 °C - Supports under-hood automotive, industrial control, and harsh-environment deployments. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress-test requirements including HBM >8 kV and temperature cycling. |
Pinout & Package
The SMF15A-HE3_A08 is housed in the DO-219AB (SMF) package: low-profile (1.08 mm height), SOD-123W-compatible outline, molded UL 94 V-0 compound, MSL level 1, and reflow-solderable with peak temperature ≤260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to ground or low-impedance return; enables clamping when cathode voltage exceeds VRWM + VF. |
| Cathode | Protected line connection | Connected to signal line (e.g., USB D+, HDMI TMDS+); conducts surge current to anode during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables DC-biased signal line protection (e.g., RS-485, CAN, analog sensors) without forward-conduction leakage during normal operation. |
| 200 W peak pulse power | Handles IEC 61000-4-5 Level 3 surges (1 kV, 2 Ω source) without failure in industrial port protection designs. |
| 367 pF capacitance | Preserves signal edge rate in 480 Mbps USB 2.0 channels; avoids eye diagram closure or jitter accumulation. |
| AEC-Q101 qualification | Validates long-term reliability in automotive infotainment and ADAS sensor interfaces subject to thermal cycling and vibration. |
| Low-profile DO-219AB | Reduces PCB real estate and mechanical profile-critical for slim consumer devices and stacked module assemblies. |
Applications
| USB 2.0 Interface Protection | HDMI 1.4 Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D- lines of embedded USB host/device ports against ESD events during hot-plug or handling. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector, clamping transients before reaching USB transceiver IC. Use Value: 367 pF capacitance avoids signal integrity loss at 480 Mbps; ±30 kV ESD rating exceeds IEC 61000-4-2 requirement for consumer electronics. |
Use Scenario: Safeguarding TMDS clock and data pairs in HDMI 1.4 sources (e.g., set-top boxes, media players) against cable-discharge events. IC Role / Device Role / Timing Role: Point-of-entry transient suppressor on each differential pair, referenced to local ground plane. Use Value: 24.4 V clamping voltage ensures HDMI receiver input remains below absolute maximum rating (typically 3.6 V) via proper series impedance design. |
| Automotive Sensor Interface | Industrial RS-485 Transceiver Port |
Use Scenario: Protecting analog or digital outputs of pressure/temperature sensors in engine control modules exposed to under-hood ESD. IC Role / Device Role / Timing Role: Unidirectional clamp on sensor output line, grounded at ECU side to absorb transients induced on harnesses. Use Value: -65 °C to +175 °C operating range and AEC-Q101 qualification ensure functionality across full automotive thermal envelope. |
Use Scenario: Shielding RS-485 transceiver pins (A/B) in factory automation gateways from lightning-induced surges and cable coupling. IC Role / Device Role / Timing Role: Primary line-side TVS, placed before common-mode choke and transceiver, with 200 W pulse rating sustaining repetitive noise bursts. Use Value: 15 V VRWM aligns with RS-485 common-mode range (-7 V to +12 V); 24.4 V VC prevents latch-up in transceivers with 15 V abs max ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T | Higher clamping voltage (26.9 V), larger SMA (DO-214AC) package (2.4 mm height), 400 pF capacitance. | Less suitable for high-speed interfaces; better for lower-frequency power/signal lines with space allowance. | Select SMAJ15A-E3/57T only if board layout accommodates taller profile and higher capacitance is acceptable. |
| TPD2E001DRYR | 2-channel bidirectional array, 15 pF per channel, integrated 4.7 kΩ resistors, 5 V VRWM, not AEC-Q101 qualified. | Targeted at portable USB/SDIO protection; lacks automotive qualification and single-line flexibility of SMF15A-HE3_A08. | Choose TPD2E001DRYR for space-constrained dual-line protection where low capacitance outweighs automotive compliance needs. |
Compared with SMAJ15A-E3/57T and TPD2E001DRYR, the SMF15A-HE3_A08 uniquely balances low capacitance (367 pF), AEC-Q101 qualification, and compact DO-219AB packaging-making it optimal for automotive and industrial high-speed signal line protection where reliability and footprint are co-prioritized.
Availability
SMF15A-HE3_A08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI 1.4 signal line safeguarding, and automotive sensor interface hardening requiring stable component supply and long-lifecycle support.
Supply support for SMF15A-HE3_A08 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 board-level ESD protection with emphasis on low capacitance, AEC-Q101 compliance, and SMT manufacturability-designed specifically for high-speed data interfaces in demanding environments.
FAQ
What is the clamping voltage of the SMF15A-HE3_A08 at its rated peak pulse current?
The SMF15A-HE3_A08 has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated 8.2 A peak pulse current (IPPM) under the 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures downstream ICs remain within safe operating voltage limits during transient events. The SMF15A-HE3_A08 maintains this performance across its full operating temperature range.
Is the SMF15A-HE3_A08 suitable for protecting USB 2.0 data lines?
Yes, the SMF15A-HE3_A08 is suitable for USB 2.0 data line protection due to its 367 pF typical capacitance at 0 V and 1 MHz, which preserves signal integrity at 480 Mbps without significant edge degradation. Its 15 V standoff voltage allows placement on D+ and D− lines with appropriate series impedance, and its ±30 kV ESD rating exceeds USB compliance requirements. The SMF15A-HE3_A08 is widely deployed in embedded host and peripheral designs.
Does the SMF15A-HE3_A08 meet automotive qualification standards?
Yes, the SMF15A-HE3_A08 is AEC-Q101 qualified, having passed stress tests including human body model (HBM) >8 kV, temperature cycling, and high-temperature operating life. This qualification confirms its suitability for automotive applications such as infotainment interfaces, sensor signal conditioning, and body control modules where reliability under thermal and electrical stress is mandatory. The SMF15A-HE3_A08 supports full automotive temperature range (-65 °C to +175 °C).
What package type does the SMF15A-HE3_A08 use, and is it compatible with automated assembly?
The SMF15A-HE3_A08 uses the DO-219AB (SMF) package-a low-profile, surface-mount outline with 3.9 mm length, 1.9 mm width, and 1.08 mm height. It is fully compatible with wave and reflow soldering processes, rated for peak reflow temperatures up to 260 °C (per J-STD-020 MSL level 1), and features tin-plated, lead-free terminations. The SMF15A-HE3_A08's tape-and-reel packaging (7" or 13" reels) supports high-volume SMT placement.
How does the SMF15A-HE3_A08 compare to bidirectional TVS diodes in ESD protection?
The SMF15A-HE3_A08 is unidirectional, meaning it protects DC-biased lines (e.g., RS-485, analog sensors, powered USB lines) with lower leakage and tighter clamping than bidirectional equivalents at the same VRWM. Unlike bidirectional diodes, it does not conduct during normal negative signal excursions-reducing power loss and avoiding false triggering. For AC-coupled or symmetric lines like HDMI, the SMF15A-HE3_A08 must be used in pairs or with complementary grounding schemes. Its design makes the SMF15A-HE3_A08 ideal for asymmetric signal paths.
SMF15A-HE3_A08 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-HE3_A08 FAQ
1.How can I place an order for SMF15A-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF15A-HE3_A08 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-HE3_A08 reliable?
The price and inventory of SMF15A-HE3_A08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF15A-HE3_A08 is usually 5 days.
3.What payment methods are accepted for SMF15A-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF15A-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF15A-HE3_A08?
SMF15A-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF15A-HE3_A08 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-HE3_A08?
For technical support, including SMF15A-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF15A-HE3_A08 requirements.
6.How does Aetrix verify that SMF15A-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF15A-HE3_A08 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-HE3_A08 meets industry standards.
7.What is the process for return or replacement of SMF15A-HE3_A08?
All SMF15A-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF15A-HE3_A08, 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-HE3_A08 part is unused and in its original packaging.
Return procedure for SMF15A-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF15A-HE3_A08 Tags
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