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Vishay General Semiconductor - Diodes Division SMA6F11A-M3/6A
- Part No.:
- SMA6F11A-M3/6A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F11A-M3/6A.pdf
- Description:
- TVS DIODE 11VWM 21.5VC DO221AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6F11A-M3/6A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SlimSMA (DO-221AC) package, designed for clamping voltage transients on power and signal lines. It features 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, and IEC 61000-4-2 Level 4 ESD protection (15 kV air / 8 kV contact).
For engineers reviewing the SMA6F11A-M3/6A datasheet, SMA6F11A-M3/6A pinout, SMA6F11A-M3/6A application, or SMA6F11A-M3/6A equivalent, key selection criteria include clamping performance under 10/1000 μs surge, thermal derating above 25 °C, unidirectional polarity alignment, and compatibility with automated placement on FR4 PCBs using standard 2 oz. copper footprint.
Technical Context
This TVS diode operates as a Zener-based overvoltage clamp, triggered when reverse voltage exceeds its breakdown threshold. Its dynamic resistance (RD) is 0.107 Ω, enabling low-voltage overshoot during transient events, and it exhibits a voltage temperature coefficient (αT) of 8.1 × 10⁻⁴ /°C for predictable VBR drift across -55 to +175 °C junction range.
The device is rated for 600 W peak pulse power (10/1000 μs) and 4 kW (8/20 μs), with thermal resistance junction-to-ambient (RθJA) up to 150 °C/W on FR4 PCB. It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - Confirmed breakdown window ensures reliable turn-on margin above VWM |
| VC @ IPPM | 17.2 V at 34.8 A (10/1000 μs) - Clamping voltage defines worst-case overvoltage seen by protected IC |
| PPPM (10/1000 μs) | 600 W - Sustains standardized lightning-surge energy without failure |
| ID @ VWM | 1.0 μA max - Ultra-low leakage preserves signal integrity and battery life in standby |
| TJ max. | +175 °C - Enables operation in high-temperature industrial and automotive under-hood environments |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - Validated human-body-model robustness for front-panel interfaces |
Pinout & Package
Package: SlimSMA (DO-221AC), ultra-low-profile surface-mount case with 0.95 mm typical height, matte tin-plated leads, halogen-free and RoHS-compliant (M3 suffix), MSL Level 1, JESD201 Class 2 whisker tested. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., GND or return path) in unidirectional clamp configuration |
| Cathode | Current exit terminal during reverse clamping | Connected to protected line (e.g., VBUS or signal); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | 17.2 V VC at 34.8 A (10/1000 μs) enables safe protection of 12 V logic and power rails |
| Low-profile mounting | 0.95 mm typical height allows use in space-constrained consumer and portable electronics |
| Automated assembly support | Slender SlimSMA outline and matte tin plating ensure reliable pick-and-place and solder wetting |
| High-temperature reliability | 175 °C max junction temperature supports extended-life operation in industrial motor drives and power supplies |
| ESD-hardened interface | IEC 61000-4-2 Level 4 rating protects USB, UART, and sensor I/O against user-handling surges |
Applications
| USB Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 5 V/12 V USB-C power delivery inputs from load-dump and hot-swap transients in docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp surges before they reach USB PD controller or load switch. Use Value: Limits transient overvoltage to ≤17.2 V, preventing latch-up or gate oxide damage in downstream silicon rated for 20 V absolute maximum. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) in factory-floor pressure/temperature sensors exposed to relay switching noise. IC Role / Device Role / Timing Role: TVS connected across signal and return to absorb inductive kickback from nearby solenoids or contactors. Use Value: 600 W 10/1000 μs rating handles repetitive 100–500 V spikes without degradation, maintaining long-term calibration stability. |
| Automotive Body Control Module (BCM) Inputs | Telecom Ethernet PHY Interface Clamp |
Use Scenario: Protecting LIN bus or switched 12 V inputs in BCMs subjected to ISO 7637-2 pulse 1 and pulse 2a transients. IC Role / Device Role / Timing Role: Unidirectional clamp on each input rail referenced to chassis ground, leveraging low RD (0.107 Ω) for fast response. Use Value: 175 °C TJ max and MSL Level 1 enable reflow-compatible integration into high-reliability automotive PCBs without post-assembly handling concerns. | Use Scenario: Shielding 2.5 V/3.3 V Ethernet PHY differential pairs from ESD events during cable insertion in enterprise switches. IC Role / Device Role / Timing Role: Discrete TVS applied per pair (e.g., TX+/TX− to GND) to meet IEC 61000-4-2 Level 4 compliance. Use Value: 8 kV contact / 15 kV air ESD rating exceeds EN 61000-4-2 requirements while adding <0.5 pF parasitic capacitance per line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F11A-M3/6B | Same electrical specs; differs only in tape-and-reel packaging (14,000 pcs/reel vs. 3,500 pcs/reel) | No functional difference; selected for high-volume automated assembly requiring larger reels | Choose SMA6F11A-M3/6B when optimizing for feeder change frequency and production throughput |
| SMAJ11A-M3/A | Higher RθJA (175 °C/W), lower PPPM (400 W), same VWM/VBR/VC but higher RD (0.12 Ω) | Less effective clamping under high-energy surges; suitable only for lower-risk consumer-grade interfaces | Select SMA6F11A-M3/6A over SMAJ11A-M3/A where 600 W surge immunity and tighter thermal management are required |
Compared with SMA6F11A-M3/6B, the original part offers identical protection performance in smaller reel format; versus SMAJ11A-M3/A, SMA6F11A-M3/6A delivers 50 % higher surge power handling and lower clamping impedance-critical for protecting sensitive 12 V microcontrollers and CAN transceivers in harsh environments.
Availability
SMA6F11A-M3/6A is available at Aetrix Electronics and suitable for USB power delivery systems, industrial sensor nodes, automotive body control modules, and telecom PHY interfaces requiring stable component supply, consistent M3-grade material compliance, and verified SlimSMA footprint compatibility.
Supply support for SMA6F11A-M3/6A 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMA6FxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in compact, automated-assembly-ready packages targeting automotive, industrial, and communications infrastructure designs.
FAQ
What is the maximum clamping voltage of the SMA6F11A-M3/6A under a 10/1000 μs surge?
The SMA6F11A-M3/6A has a maximum clamping voltage (VC) of 17.2 V when subjected to a 34.8 A peak pulse current with a 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-M3/6A maintains this clamping performance across its specified operating temperature range, supporting robust design margin for 12 V systems.
Does the SMA6F11A-M3/6A support lead-free reflow soldering?
Yes, the SMA6F11A-M3/6A is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C, compliant with J-STD-020 MSL Level 1 requirements. Its matte tin-plated terminals meet J-STD-002 and JESD22-B102 solderability standards, and the M3 suffix confirms halogen-free, RoHS-compliant construction and JESD201 Class 2 whisker resistance-ensuring long-term interconnect reliability in production assemblies.
How does the SMA6F11A-M3/6A differ from bidirectional TVS diodes?
The SMA6F11A-M3/6A is unidirectional, meaning it conducts only during negative transients relative to its cathode, functioning like a Zener diode in reverse bias. Unlike bidirectional variants, it does not suppress positive-going surges on AC-coupled lines. This makes the SMA6F11A-M3/6A ideal for DC power rails and single-ended signal lines where polarity is fixed, offering tighter VBR tolerance and lower leakage than equivalent bidirectional parts.
Can the SMA6F11A-M3/6A be used in automotive applications?
Yes, the SMA6F11A-M3/6A is suitable for automotive applications including body control modules and infotainment power inputs. It operates across -55 to +175 °C junction temperature, meets ISO 7637-2 pulse immunity requirements via its 600 W (10/1000 μs) and 4 kW (8/20 μs) ratings, and carries MSL Level 1 qualification for reflow compatibility. The SMA6F11A-M3/6A is widely deployed in 12 V vehicle subsystems requiring compact, high-reliability transient suppression.
What is the thermal resistance of the SMA6F11A-M3/6A on a standard FR4 PCB?
The SMA6F11A-M3/6A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and a maximum of 150 °C/W when mounted on a standard FR4 PCB with 2 oz. copper and the recommended footprint. This value is critical for calculating allowable power dissipation at elevated ambient temperatures using the derating curve in Figure 5 of the datasheet. The SMA6F11A-M3/6A's low RθJA supports sustained operation in thermally dense layouts without external heatsinking.
SMA6F11A-M3/6A 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-M3/6A FAQ
1.How can I place an order for SMA6F11A-M3/6A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F11A-M3/6A 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-M3/6A reliable?
The price and inventory of SMA6F11A-M3/6A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F11A-M3/6A is usually 5 days.
3.What payment methods are accepted for SMA6F11A-M3/6A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F11A-M3/6A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F11A-M3/6A?
SMA6F11A-M3/6A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F11A-M3/6A 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-M3/6A?
For technical support, including SMA6F11A-M3/6A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F11A-M3/6A requirements.
6.How does Aetrix verify that SMA6F11A-M3/6A is sourced from the original manufacturer or authorized distributors?
All SMA6F11A-M3/6A 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-M3/6A meets industry standards.
7.What is the process for return or replacement of SMA6F11A-M3/6A?
All SMA6F11A-M3/6A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F11A-M3/6A, 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-M3/6A part is unused and in its original packaging.
Return procedure for SMA6F11A-M3/6A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F11A-M3/6A Tags
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