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Vishay General Semiconductor - Diodes Division SMF15A-M3-08
- Part No.:
- SMF15A-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF15A-M3-08.pdf
- Description:
- TVS DIODE 15VWM 24.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:26,650
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Product details
Overview
SMF15A-M3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient suppression on high-speed data lines. It features a 15 V stand-off voltage (VRWM), 16.7–18.5 V reverse breakdown (VBR), 24.4 V maximum clamping voltage at 8.2 A peak pulse current (IPPM), 367 pF typical junction capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity - used in USB 2.0, HDMI, and industrial sensor interface protection.
For engineers reviewing the SMF15A-M3-08 datasheet, SMF15A-M3-08 pinout, SMF15A-M3-08 application, or SMF15A-M3-08 equivalent, this device is evaluated for high-reliability ESD hardening of 15 V-rated signal paths where low clamping voltage, fast response (<1 ns), and AEC-Q101 qualification are required - especially in automotive infotainment and industrial HMI designs.
Technical Context
This unidirectional TVS diode operates as a shunt-type transient suppressor: under normal bias it presents high impedance (>100 MΩ at VRWM), then rapidly avalanches below 100 ps to clamp transients. Its low incremental surge resistance enables tight clamping performance across 10/1000 μs waveforms, with thermal resistance RthJA = 180 K/W on standard 3 mm × 3 mm Cu pads.
The SMF15A-M3-08 leverages Vishay's "Low Noise" silicon process for sub-nanosecond response and stable capacitance vs. voltage behavior - critical for preserving signal integrity on 480 Mbps USB 2.0 lines. It meets AEC-Q101 stress requirements including H3B-class human body model (>8 kV) and full IEC 61000-4-2 contact/air discharge compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 15 V - maximum continuous reverse operating voltage before leakage exceeds 0.1 µA; defines safe signal swing range for protected line. |
| Breakdown Voltage (VBR) | 16.7–18.5 V at 1 mA - guaranteed avalanche initiation window; ensures predictable turn-on margin above VRWM. |
| Clamping Voltage (VC) | 24.4 V at 8.2 A (10/1000 µs) - peak voltage seen by downstream IC during surge; limits stress on 16–24 V logic interfaces. |
| Junction Capacitance (CD) | 367 pF at 0 V, 1 MHz - low enough for USB 2.0 eye diagram compliance; degrades minimally up to 10 V reverse bias. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirement for consumer and automotive end equipment. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 × 1.9 × 1.08 mm low-profile outline enabling dense PCB layouts and automated reflow assembly. |
| AEC-Q101 Qualified | Yes - qualified for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per AEC-Q101 Rev D. |
Pinout & Package
SMF15A-M3-08 uses the DO-219AB (SOD-123W-compatible) surface-mount package: cathode-marked single-diode configuration with two terminals - anode and cathode - in a low-profile, molded plastic case rated UL 94 V-0, MSL level 1, and compatible with wave/reflow soldering (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Input/line side connection | Connected to signal trace requiring ESD protection; carries surge current into diode during transient events. |
| Cathode (bar-marked end) | Ground reference node | Connected to system ground or low-impedance return path; provides low-resistance discharge path for clamped energy. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 µs) | Supports robust protection against multiple ESD strikes without degradation - validated over 1000+ pulses in qualification testing. |
| Sub-1 ns response time | Enables clamping before transient energy couples into sensitive receiver inputs - critical for high-speed digital interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on protected ICs relative to breakdown threshold - improves system-level surge margin. |
| 367 pF capacitance at 0 V | Preserves signal rise/fall times on 480 Mbps USB 2.0 links; maintains <1 dB insertion loss up to 200 MHz. |
| AEC-Q101 qualification | Validates suitability for automotive cabin electronics, ADAS sensors, and infotainment ports exposed to harsh thermal and vibration environments. |
Applications
| USB 2.0 Data Lines | HDMI TMDS Channels |
|---|---|
|
Use Scenario: Protecting D+ and D− differential pairs in portable USB hosts and peripherals against electrostatic discharge during hot-plug events. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed directly at connector entry point to divert ESD current away from USB transceiver IC. Use Value: Maintains 480 Mbps data integrity with <367 pF loading and clamps 15 kV contact discharges to ≤24.4 V - preventing PHY latch-up or damage. |
Use Scenario: Safeguarding HDMI source/sink TMDS clock and data channels in set-top boxes, monitors, and automotive displays. IC Role / Device Role / Timing Role: Unidirectional ESD clamp on each TMDS pair, referenced to shield ground, minimizing capacitance-induced skew between lanes. Use Value: Enables HDMI 1.4 compliance with <0.5% eye closure penalty at 2.25 Gbps; clamping voltage stays below 25 V to protect 3.3 V receiver inputs. |
| Automotive Infotainment Ports | Industrial Sensor Interfaces |
|
Use Scenario: Hardening USB-C, micro-B, and auxiliary audio jacks in vehicle head units and center consoles against repeated ESD exposure in dry climates. IC Role / Device Role / Timing Role: AEC-Q101-qualified front-end protector mounted adjacent to connectors, providing first-line defense before internal EMI filters. Use Value: Survives >1000 cycles of ±30 kV contact discharge per ISO 10605; operates continuously from −65 °C to +175 °C junction temperature. |
Use Scenario: Protecting RS-485, CAN FD, and analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs and motor drives. IC Role / Device Role / Timing Role: Low-leakage (0.1 µA max at VRWM) shunt diode on signal lines interfacing with isolated microcontrollers or ADCs. Use Value: Prevents false triggering or offset drift in precision 16-bit analog measurements while suppressing 4 kV EFT bursts per IEC 61000-4-4. |
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 (27.7 V at 7.2 A), larger SMA package (4.5 × 2.7 × 2.2 mm), 400 pF capacitance. | Less suitable for USB 2.0 due to higher capacitance and slower response; better for lower-speed 24 V industrial lines. | Select when board space allows larger footprint and signal bandwidth <100 MHz; not recommended for high-speed data. |
| TPD2E001DRYR | Bi-directional dual-channel array (2 × 15 V), 12 pF typical capacitance, integrated 10 Ω series resistors, SOT-553 package. | Optimized for ultra-high-speed interfaces (USB 3.0, DisplayPort); lacks AEC-Q101 qualification and 30 kV ESD rating. | Choose for multi-line, low-capacitance protection where automotive qualification is not required and layout supports fine-pitch routing. |
Compared with SMAJ15A-E3/57T and TPD2E001DRYR, SMF15A-M3-08 delivers optimal balance of compact DO-219AB size, 367 pF loading, 24.4 V clamping, and AEC-Q101 compliance - making it the preferred choice for space-constrained, automotive-grade USB 2.0 and HDMI protection.
Availability
SMF15A-M3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial HMI panels, and USB-enabled medical devices requiring stable component supply and long-term lifecycle assurance.
Supply support for SMF15A-M3-08 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 Intertechnology is a global manufacturer of discrete semiconductors and passive components, specializing in high-reliability solutions for automotive, industrial, and computing markets.
The SMF series targets high-speed interface protection with AEC-Q101 qualification, low capacitance, and tight clamping - engineered specifically for USB, HDMI, and automotive sensor port hardening.
FAQ
What is the maximum clamping voltage of the SMF15A-M3-08 under a 10/1000 µs surge?
The SMF15A-M3-08 has a maximum clamping voltage (VC) of 24.4 V at 8.2 A peak pulse current with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures downstream ICs see limited overvoltage during transient events - critical for protecting 16–24 V logic interfaces without compromising reliability.
Is SMF15A-M3-08 qualified to AEC-Q101 standards?
Yes, SMF15A-M3-08 is AEC-Q101 qualified per Rev D requirements, including temperature cycling, high-temperature reverse bias (HTRB), and human body model ESD (class H3B > 8 kV). This qualification confirms its suitability for automotive cabin electronics, infotainment systems, and ADAS sensor interfaces where long-term reliability under thermal and electrical stress is mandatory.
What is the junction capacitance of SMF15A-M3-08 at 0 V and 1 MHz?
The SMF15A-M3-08 exhibits a typical junction capacitance (CD) of 367 pF at 0 V reverse bias and 1 MHz frequency. This value remains stable across operating voltages up to 10 V, supporting signal integrity in USB 2.0 and HDMI 1.4 applications - verified via Vishay's published capacitance vs. voltage curves in Figure 5 of document 85881.
How does the SMF15A-M3-08 compare to SMF15A-E3-08 in terms of packaging and compatibility?
SMF15A-M3-08 and SMF15A-E3-08 share identical electrical specifications and DO-219AB (SOD-123W-compatible) package dimensions, but differ in tape-and-reel packaging: M3-08 uses 3 k per 7″ reel (8 mm tape), while E3-08 uses the same format with alternate environmental coding. Both are fully interchangeable in design and assembly - no layout or schematic changes required.
Can SMF15A-M3-08 be used for bidirectional signal lines like RS-485?
No - SMF15A-M3-08 is a unidirectional TVS diode intended for DC-biased or ground-referenced signal lines. For bidirectional interfaces such as RS-485, a symmetrical (bidirectional) device like SMBJ15CA or P6SMB15CA is required. Using SMF15A-M3-08 on AC-coupled or floating lines risks forward conduction during negative transients and inadequate protection.
SMF15A-M3-08 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:
- General Purpose
- Capacitance @ Frequency:
- 367pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF15A-M3-08 FAQ
1.How can I place an order for SMF15A-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF15A-M3-08 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-M3-08 reliable?
The price and inventory of SMF15A-M3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF15A-M3-08 is usually 5 days.
3.What payment methods are accepted for SMF15A-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF15A-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF15A-M3-08?
SMF15A-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF15A-M3-08 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-M3-08?
For technical support, including SMF15A-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF15A-M3-08 requirements.
6.How does Aetrix verify that SMF15A-M3-08 is sourced from the original manufacturer or authorized distributors?
All SMF15A-M3-08 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-M3-08 meets industry standards.
7.What is the process for return or replacement of SMF15A-M3-08?
All SMF15A-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF15A-M3-08, 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-M3-08 part is unused and in its original packaging.
Return procedure for SMF15A-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF15A-M3-08 Tags
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