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Vishay General Semiconductor - Diodes Division SMA6F6.5A-M3/6A
- Part No.:
- SMA6F6.5A-M3/6A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F6.5A-M3/6A.pdf
- Description:
- TVS DIODE 6.5VWM 14.5VC DO221AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,195
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Product details
Overview
SMA6F6.5A-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 6.5 V stand-off voltage (VWM), 7.2–7.96 V breakdown voltage (VBR), 10.2 V max clamping voltage at 250 A (8/20 μs), 600 W peak pulse power (10/1000 μs), and IEC 61000-4-2 Level 4 ESD protection (15 kV air / 8 kV contact). It is used to protect MOSFET gates, sensor interfaces, and microcontroller I/O in industrial power supplies.
For engineers reviewing the SMA6F6.5A-M3/6A datasheet, SMA6F6.5A-M3/6A pinout, SMA6F6.5A-M3/6A application, or SMA6F6.5A-M3/6A equivalent, this page delivers verified electrical specs, thermal derating behavior, clamping performance under standardized surge waveforms, JEDEC-compliant MSL level 1 reflow compatibility, and real-world design implications of its 0.95 mm profile and matte tin terminals.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (7.2–7.96 V), it avalanches to divert transient current while limiting VC to ≤10.2 V at 250 A (8/20 μs) and ≤14.5 V at 100 A (10/1000 μs). Its dynamic resistance is 58.8 Ω, enabling predictable clamping via VC = RD × IPP + VBR(max).
Thermally, it supports junction temperatures from –55 °C to +175 °C, with RθJA = 120–150 °C/W (FR4, 2 oz. copper) and RθJM = 12–15 °C/W. Power dissipation is derated linearly above TA = 25 °C, dropping to 8 W at TM = 55 °C and 1.0 W at TA = 25 °C on standard PCB mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before significant leakage; sets minimum system operating margin. |
| VBR (min/max) | 7.2 V / 7.96 V - Breakdown threshold range at 10 mA test current; defines turn-on consistency across production lots. |
| VC @ IPP | 10.2 V at 250 A (8/20 μs) - Clamped voltage during high-energy surges; determines protected IC's voltage stress limit. |
| PPPM (10/1000 μs) | 600 W - Surge energy handling capacity for long-duration transients like inductive switch-off. |
| PPPM (8/20 μs) | 4000 W - Short-duration surge rating matching lightning-induced transients per IEC 61000-4-5. |
| ID @ VWM | 100 μA max - Reverse leakage at stand-off voltage; ensures minimal quiescent power loss in battery-powered systems. |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - Validates robustness against human-body-model electrostatic discharge events. |
Pinout & Package
Package: SlimSMA (DO-221AC), ultra-low-profile surface-mount case with 0.95 mm typical height, matte tin-plated leads, cathode indicated by color band, MSL level 1 (260 °C peak reflow), halogen-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to lower-potential side of protected line. | Provides low forward voltage drop (~1.0 V) for bidirectional testing or fault-current path definition. |
| Cathode | Current exit terminal during reverse avalanche; connected to higher-potential side (e.g., VCC or signal line). | Defines polarity-sensitive clamping direction; color band identifies this terminal for automated placement verification. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | 10.2 V max at 250 A (8/20 μs) enables reliable protection of 5 V logic and 3.3 V MCU I/O without overvoltage damage. |
| Low-profile packaging | 0.95 mm typical height allows use in space-constrained portable and automotive ECUs where Z-height is critical. |
| Automated placement readiness | Matte tin terminals meet J-STD-002/JESD22-B102 solderability; M3 suffix passes JESD201 Class 2 whisker test. |
| Thermal robustness | 175 °C max junction temperature and defined RθJA/RθJM support operation in high-ambient industrial environments. |
| ESD immunity | IEC 61000-4-2 Level 4 compliance ensures survivability against field-level static discharge during handling and deployment. |
Applications
| Industrial Motor Drive Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: Suppresses inductive kickback from 24 V solenoid drivers and relay coils in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt TVS placed between coil supply rail and ground, triggered within nanoseconds of voltage overshoot. Use Value: Limits transient spikes to ≤10.2 V, preventing latch-up or gate oxide rupture in driving MOSFETs rated for 20 V VDS. |
Use Scenario: Shields LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamp on signal line referenced to vehicle chassis ground, activated only during positive transients. Use Value: Maintains signal integrity below 10.2 V clamping threshold while surviving 4 kW (8/20 μs) surges per ISO 16750-2. |
| Consumer Power Adapter Input Stage | Telecom Ethernet PHY Protection |
Use Scenario: Guards AC-DC converter primary-side control ICs and optocoupler inputs against mains-borne surges. IC Role / Device Role / Timing Role: Stand-off device across bulk capacitor or controller VDD-to-GND, absorbing energy before regulator input. Use Value: Withstands 600 W (10/1000 μs) transients while holding clamping voltage below 14.5 V at 100 A-safe for 16 V-rated controllers. |
Use Scenario: Protects 10/100BASE-TX PHY differential pairs from ESD and fast-rising noise coupled from adjacent switching circuits. IC Role / Device Role / Timing Role: Discrete unidirectional TVS on each data line (MDI/MDI-X), grounded at common point near connector. Use Value: 15 kV air-gap ESD rating prevents latch-up in PHY receivers; 0.95 mm height avoids interference with RJ45 jack shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F6.0A-M3/6A | Lower VWM (6.0 V) and VBR (6.7–7.41 V); 9.5 V clamping at 150 A (8/20 μs). | Better suited for 5 V systems with tighter voltage margins; less headroom before clamping vs. SMA6F6.5A-M3/6A. | Select when protecting 5 V rails where 6.5 V VWM risks false triggering during normal ripple. |
| SMA6F7.5A-M3/6A | Higher VWM (7.5 V) and VBR (8.33–9.21 V); 11.8 V clamping at 125 A (8/20 μs). | Appropriate for 6–7 V bias rails; trades higher clamping voltage for improved immunity to nuisance tripping. | Choose for 6.3 V or 7 V logic interfaces where 6.5 V VWM may be too close to operating voltage. |
Compared with SMA6F6.0A-M3/6A and SMA6F7.5A-M3/6A, the SMA6F6.5A-M3/6A offers optimal balance for 5.5–6.0 V nominal systems: sufficient margin above 5 V logic levels while maintaining lower clamping than the 7.5 V variant, reducing stress on downstream components without compromising surge immunity.
Availability
SMA6F6.5A-M3/6A is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and consumer power adapter input stages requiring stable component supply, consistent MSL level 1 reflow compatibility, and traceable halogen-free sourcing.
Supply support for SMA6F6.5A-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, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, thermal performance, and application-specific optimization.
The SMA6F series is part of Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in space-constrained, high-reliability applications including industrial automation, automotive electronics, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of the SMA6F6.5A-M3/6A under an 8/20 μs surge?
The SMA6F6.5A-M3/6A has a maximum clamping voltage (VC) of 10.2 V at 250 A under an 8/20 μs waveform. This value is measured per standard test conditions and reflects worst-case voltage seen by protected circuitry during high-energy transients. The SMA6F6.5A-M3/6A maintains this clamping performance across its specified operating temperature range and is validated per IEC 61000-4-5 surge immunity requirements.
Is the SMA6F6.5A-M3/6A suitable for bidirectional transient protection?
No, the SMA6F6.5A-M3/6A is a unidirectional TVS diode and provides clamping only for positive transients relative to its cathode connection. It does not suppress negative-going surges on the same line. For bidirectional protection, a separate device such as the SMBJ6.5A or a dedicated bidirectional TVS must be used. The SMA6F6.5A-M3/6A datasheet explicitly states "Unidirectional only" in its FEATURES section.
What is the thermal resistance junction-to-ambient (RθJA) for the SMA6F6.5A-M3/6A on a standard PCB?
The SMA6F6.5A-M3/6A has a typical RθJA of 120 °C/W and a maximum of 150 °C/W when mounted on an FR4 PCB with 2 oz. copper and standard footprint per JEDEC 51-2A. This value governs power derating: at ambient temperatures above 25 °C, allowable power dissipation decreases linearly, reaching 8 W at 55 °C case temperature. The SMA6F6.5A-M3/6A's 175 °C max junction temperature supports operation in demanding thermal environments.
Does the SMA6F6.5A-M3/6A meet lead-free reflow requirements?
Yes, the SMA6F6.5A-M3/6A meets lead-free reflow requirements with MSL level 1 rating per J-STD-020 and a maximum peak reflow temperature of 260 °C. Its matte tin-plated terminals comply with J-STD-002 and JESD22-B102 solderability standards, and the M3 suffix confirms passing JESD201 Class 2 whisker testing. The SMA6F6.5A-M3/6A is halogen-free, RoHS-compliant, and qualified for industrial-grade reliability.
How does the SMA6F6.5A-M3/6A compare to SMA6F6.0A-M3/6A in terms of voltage margin?
The SMA6F6.5A-M3/6A offers a 6.5 V stand-off voltage (VWM), providing 1.5 V margin above a nominal 5 V rail, whereas the SMA6F6.0A-M3/6A offers only 1.0 V margin. This extra 0.5 V reduces risk of false triggering due to ripple or noise on 5 V lines. Both share identical SlimSMA packaging and thermal specs, but the SMA6F6.5A-M3/6A's higher VBR (7.2–7.96 V vs. 6.7–7.41 V) and slightly higher clamping voltage (10.2 V vs. 9.5 V) reflect its optimized trade-off between immunity and protection level.
SMA6F6.5A-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):
- 6.5V
- Voltage - Breakdown (Min):
- 7.2V
- Voltage - Clamping (Max) @ Ipp:
- 14.5V
- Current - Peak Pulse (10/1000µs):
- 276A (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)
SMA6F6.5A-M3/6A FAQ
1.How can I place an order for SMA6F6.5A-M3/6A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F6.5A-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 SMA6F6.5A-M3/6A reliable?
The price and inventory of SMA6F6.5A-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 SMA6F6.5A-M3/6A is usually 5 days.
3.What payment methods are accepted for SMA6F6.5A-M3/6A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F6.5A-M3/6A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F6.5A-M3/6A?
SMA6F6.5A-M3/6A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F6.5A-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 SMA6F6.5A-M3/6A?
For technical support, including SMA6F6.5A-M3/6A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F6.5A-M3/6A requirements.
6.How does Aetrix verify that SMA6F6.5A-M3/6A is sourced from the original manufacturer or authorized distributors?
All SMA6F6.5A-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 SMA6F6.5A-M3/6A meets industry standards.
7.What is the process for return or replacement of SMA6F6.5A-M3/6A?
All SMA6F6.5A-M3/6A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F6.5A-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 SMA6F6.5A-M3/6A part is unused and in its original packaging.
Return procedure for SMA6F6.5A-M3/6A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F6.5A-M3/6A Tags
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