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Vishay General Semiconductor - Diodes Division SMA6F11A-M3/6B
- Part No.:
- SMA6F11A-M3/6B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F11A-M3/6B.pdf
- Description:
- TVS DIODE 11VWM 21.5VC DO221AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6F11A-M3/6B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SlimSMA (DO-221AC) package, designed for clamping inductive switching transients and ESD events on signal lines. It features a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR at 1 mA), 17.2 V maximum clamping voltage (VC) at 34.8 A (10/1000 μs), 600 W peak pulse power rating, and IEC 61000-4-2 Level 4 ESD immunity (±15 kV air / ±8 kV contact).
For engineers reviewing the SMA6F11A-M3/6B datasheet, SMA6F11A-M3/6B pinout, SMA6F11A-M3/6B application, or SMA6F11A-M3/6B equivalent, this device is selected for robust overvoltage protection in space-constrained consumer, industrial, and telecom interfaces where low-profile mounting, automated placement compatibility, and stable clamping under repetitive surge stress are critical.
Technical Context
This TVS diode operates as a unidirectional Zener-clamped protector with fast response to transient overvoltages. Its electrical behavior is defined by precise VBR tolerance (±5% typical), low dynamic resistance (0.107 Ω), and temperature-stable breakdown (αT = 8.1 × 10⁻⁴ /°C), enabling predictable clamping across -55 °C to +175 °C junction temperature range.
The device uses silicon planar construction in a halogen-free, RoHS-compliant SlimSMA package with matte tin-plated leads. It meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C) and passes JESD201 Class 2 whisker testing, supporting high-reliability automated SMT assembly without solderability degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe signal line bias margin. |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - Tight breakdown window ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM (10/1000 μs) | 17.2 V at 34.8 A - Clamping voltage during standard lightning-surge test; limits downstream IC stress to safe levels. |
| PPPM (10/1000 μs) | 600 W - Peak transient energy absorption capability under standardized surge waveform; enables single-device protection for moderate-energy transients. |
| ESD Rating | IEC 61000-4-2 Level 4: ±15 kV air / ±8 kV contact - Validated human-body-model immunity for front-panel and connector interfaces. |
| TJ max. | +175 °C - High junction temperature rating supports operation in thermally demanding environments like enclosed industrial enclosures. |
| RθJA | 120–150 °C/W - Thermal resistance to ambient on FR4 PCB; informs derating requirements for sustained power dissipation. |
Pinout & Package
Package: SlimSMA (DO-221AC), surface-mount, low-profile (0.95 mm typical height), cathode indicated by color band. Meets UL 94 V-0 flammability rating and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected line's lower-potential side (e.g., ground or signal return); forms clamping path when cathode is biased above anode. |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line's higher-potential side (e.g., supply rail or signal input); conducts surge current to anode during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (0.95 mm height) | Enables use in ultra-thin consumer devices and dense PCB layouts without mechanical interference or height clearance issues. |
| Unidirectional clamping only | Optimized for DC-biased or single-polarity signal paths (e.g., USB VBUS, RS-485 A/B lines), avoiding unnecessary capacitance of bidirectional designs. |
| 600 W (10/1000 μs) & 4 kW (8/20 μs) PPPM | Supports both IEC 61000-4-5 surge immunity and telecom lightning strike standards with a single component. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement and allows direct placement into standard lead-free SMT reflow profiles. |
| Halogen-free, RoHS-compliant, industrial grade | Meets global environmental compliance mandates and supports long-term reliability in harsh operating conditions. |
Applications
| USB Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Protecting USB VBUS line against hot-plug inrush, cable ESD, and nearby relay switching noise in embedded host controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp transients before they reach USB controller or PMIC. Use Value: Limits VBUS overshoot to ≤17.2 V during 34.8 A surges, preserving USB 2.0/3.0 PHY integrity and preventing latch-up in connected SoCs. |
Use Scenario: Safeguarding analog output (4–20 mA) or digital I/O (RS-485) lines of factory-floor pressure/temperature sensors exposed to motor drive noise. IC Role / Device Role / Timing Role: Standoff-connected TVS on sensor transmitter output, referenced to local ground, absorbing inductive kickback from solenoid actuation. Use Value: Clamps 600 W transients within 1 ns response time, maintaining signal fidelity and preventing damage to isolated ADC drivers or level translators. |
| Telecom Line Interface | Consumer Audio Port ESD Guard |
|
Use Scenario: Front-end protection for POTS or VoIP line interface ICs subjected to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary clamping device on tip/ring lines, coordinated with gas discharge tube (GDT) for staged surge handling. Use Value: Delivers 4 kW (8/20 μs) surge capacity while maintaining <1 μA leakage at 11 V, ensuring minimal impact on line impedance and voice signal quality. |
Use Scenario: ESD protection for 3.5 mm audio jack inputs/outputs in smartphones and portable speakers exposed to user-handling discharges. IC Role / Device Role / Timing Role: Direct-coupled TVS on left/right channel and ground traces, positioned adjacent to jack connector. Use Value: Withstands ±15 kV air-gap ESD per IEC 61000-4-2 without degradation, preserving audio SNR and eliminating pop/click artifacts during discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F11A-M3/6A | Identical electrical specs and SlimSMA package; differs only in tape-and-reel packaging (3500 pcs vs. 14000 pcs per reel). | No functional difference; suitable for same PCB footprints and protection circuits. | Select SMA6F11A-M3/6A for smaller batch prototyping or low-volume production runs requiring shorter reels. |
| SMAJ11A-M3/61 | Same VWM (11 V), but lower PPPM (400 W vs. 600 W), higher VC (18.2 V), and larger SMA (DO-214AC) package (2.4 mm height). | Less effective for high-energy transients; requires more board area and may not meet compact design constraints. | Choose SMAJ11A-M3/61 only if legacy SMA footprint compatibility is required and 400 W surge rating suffices. |
Compared with SMA6F11A-M3/6B, SMA6F11A-M3/6A offers identical protection performance in a smaller reel format, while SMAJ11A-M3/61 trades surge capacity and profile height for backward package compatibility-making SMA6F11A-M3/6B optimal for new designs prioritizing energy handling and space efficiency.
Availability
SMA6F11A-M3/6B is available at Aetrix Electronics and suitable for USB power line protection, industrial sensor signal conditioning, telecom line interface, and consumer audio port ESD guard applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SMA6F11A-M3/6B 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 General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The SMA6FxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-energy, low-profile transient suppression in automated SMT environments where board space, thermal resilience, and ESD robustness are critical.
FAQ
What is the maximum clamping voltage of the SMA6F11A-M3/6B under a 10/1000 μs surge?
The SMA6F11A-M3/6B has a maximum clamping voltage (VC) of 17.2 V when subjected to its rated peak pulse current of 34.8 A under the 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMA6F11A-M3/6B maintains this clamping performance across its full operating temperature range due to its low dynamic resistance (0.107 Ω) and stable Zener characteristics.
Does the SMA6F11A-M3/6B support bidirectional transient suppression?
No, the SMA6F11A-M3/6B is a unidirectional TVS diode and does not provide symmetrical clamping for AC or bipolar signal lines. Its design intentionally omits the second Zener junction found in bidirectional variants, resulting in lower capacitance and optimized performance for DC-biased applications such as USB VBUS, RS-485, or sensor supply rails. For bidirectional protection, engineers must select a designated bidirectional variant like SMA6F11CA.
What is the standoff voltage (VWM) rating of the SMA6F11A-M3/6B, and why is it important?
The SMA6F11A-M3/6B has a standoff voltage (VWM) of 11 V, meaning it remains in high-impedance state with ≤1 μA leakage current up to this reverse voltage. This parameter ensures reliable operation without loading or interfering with normal circuit signals-critical for protecting 12 V supply rails or 3.3 V/5 V logic lines where excessive leakage could disrupt biasing or cause false triggering. The SMA6F11A-M3/6B's VWM is precisely matched to common system voltage thresholds to maximize protection margin without compromising functionality.
Can the SMA6F11A-M3/6B be used in lead-free reflow processes?
Yes, the SMA6F11A-M3/6B is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C, meeting J-STD-020 MSL Level 1 requirements. Its matte tin-plated terminals comply with J-STD-002 and JESD22-B102 solderability standards, and it passes JESD201 Class 2 whisker testing-ensuring robust interconnect reliability after standard SAC305 reflow profiles. No pre-baking is required prior to assembly, simplifying manufacturing flow for the SMA6F11A-M3/6B.
How does the thermal resistance (RθJA) of the SMA6F11A-M3/6B affect its power handling?
The SMA6F11A-M3/6B has a typical junction-to-ambient thermal resistance (RθJA) of 120–150 °C/W on a standard FR4 PCB with 2 oz. copper. This value determines how much the junction temperature rises per watt of average power dissipated-critical for applications involving repetitive transients or elevated ambient temperatures. For example, at 1 W continuous dissipation, junction temperature may rise 120–150 °C above ambient, necessitating derating above TA = 25 °C per Figure 5 in the datasheet to keep TJ ≤ 175 °C. The SMA6F11A-M3/6B's RθJA directly governs its usable duty cycle in high-frequency surge environments.
SMA6F11A-M3/6B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 172A (8/20µs)
- Power - Peak Pulse:
- 4000W (4kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
SMA6F11A-M3/6B FAQ
1.How can I place an order for SMA6F11A-M3/6B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F11A-M3/6B 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 SMA6F11A-M3/6B reliable?
The price and inventory of SMA6F11A-M3/6B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F11A-M3/6B is usually 5 days.
3.What payment methods are accepted for SMA6F11A-M3/6B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F11A-M3/6B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F11A-M3/6B?
SMA6F11A-M3/6B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F11A-M3/6B 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 SMA6F11A-M3/6B?
For technical support, including SMA6F11A-M3/6B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F11A-M3/6B requirements.
6.How does Aetrix verify that SMA6F11A-M3/6B is sourced from the original manufacturer or authorized distributors?
All SMA6F11A-M3/6B 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 SMA6F11A-M3/6B meets industry standards.
7.What is the process for return or replacement of SMA6F11A-M3/6B?
All SMA6F11A-M3/6B units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F11A-M3/6B, 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 SMA6F11A-M3/6B part is unused and in its original packaging.
Return procedure for SMA6F11A-M3/6B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F11A-M3/6B Tags
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