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Vishay General Semiconductor - Diodes Division SMA6F6.5A-M3/6B
- Part No.:
- SMA6F6.5A-M3/6B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F6.5A-M3/6B.pdf
- Description:
- TVS DIODE 6.5VWM 14.5VC DO221AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,749
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Product details
Overview
SMA6F6.5A-M3/6B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) 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 at 10 mA), 10.2 V max clamping voltage (VC) at 250 A (8/20 μs), 600 W peak pulse power (10/1000 μs), and meets IEC 61000-4-2 Level 4 ESD immunity (15 kV air / 8 kV contact). It protects MOSFETs and ICs in consumer and industrial power supplies.
For engineers reviewing the SMA6F6.5A-M3/6B datasheet, SMA6F6.5A-M3/6B pinout, SMA6F6.5A-M3/6B application, or SMA6F6.5A-M3/6B equivalent, key selection criteria include clamping performance at 250 A (8/20 μs), thermal resistance (RθJA = 120–150 °C/W), unidirectional polarity, MSL Level 1 rating, and compatibility with automated SMT assembly on FR4 PCBs.
Technical Context
This TVS diode operates as a voltage-clamped overvoltage protection device, triggered when reverse voltage exceeds its breakdown threshold (7.2–7.96 V). Its low dynamic resistance (0.038 Ω typical) ensures rapid response and minimal overshoot during transient events such as inductive load switching or ESD strikes.
It is rated for 600 W peak pulse power under 10/1000 μs waveform and 4 kW under 8/20 μs waveform, with junction temperature range from –55 °C to +175 °C. The device uses Zener-based avalanche clamping and is optimized for placement on DC power rails and low-voltage signal lines where space-constrained, high-reliability surge suppression is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 7.2 V / 7.96 V at 10 mA - Confirmed breakdown voltage range; determines precise turn-on threshold under standardized test current. |
| VC @ IPP | 10.2 V at 250 A (8/20 μs) - Clamped voltage during worst-case surge; directly limits stress on downstream ICs or MOSFETs. |
| PPPM (10/1000 μs) | 600 W - Sustained transient energy handling capability for longer-duration surges like load dump or switching spikes. |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV (air), 8 kV (contact) - Validated immunity to human-body-model ESD events without degradation. |
| RθJA | 120–150 °C/W - Thermal resistance from junction to ambient on standard FR4 PCB; governs derating above 25 °C ambient. |
| Package | SlimSMA (DO-221AC) - 2.70 × 4.35 mm footprint, 0.95 mm height; supports high-density layout and reflow-compatible assembly. |
Pinout & Package
SlimSMA (DO-221AC) package: surface-mount, unidirectional, cathode indicated by color band. Two-terminal device with anode and cathode leads formed for gull-wing soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward bias; connected to lower-potential side of protected line | Provides reference ground path during clamping; must be routed with low-inductance connection to system ground or return plane. |
| Cathode | Current exit point during reverse conduction; marked by color band | Connected to protected line (e.g., VIN, signal rail); clamps voltage to ≤10.2 V when transients exceed VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (0.95 mm height) | Enables use in ultra-thin consumer electronics and stacked PCB assemblies without mechanical interference. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow without moisture-induced damage; eliminates pre-bake requirement. |
| Halogen-free, RoHS-compliant, industrial grade (M3 suffix) | Meets global environmental compliance and reliability standards for automotive-adjacent and industrial deployments. |
| Matte tin-plated leads | Ensures reliable solder wetting per J-STD-002 and JESD22-B102; prevents intermetallic voiding in high-volume SMT lines. |
| Junction temperature max = 175 °C | Allows operation in high-ambient environments (e.g., enclosed power supplies, motor drives) with full derating margin. |
Applications
| Power Supply Input Protection | MOSFET Gate Protection |
|---|---|
|
Use Scenario: Suppresses inductive kickback and load-dump transients on 5–12 V DC input rails of wall adapters, PoE injectors, and industrial SMPS. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground, clamping surges within 1 ns to protect upstream rectifiers and downstream regulators. Use Value: Limits VIN to ≤10.2 V during 250 A (8/20 μs) events, preventing latch-up or oxide rupture in 12 V-rated controllers and LDOs. |
Use Scenario: Shields gate oxide of N-channel power MOSFETs in half-bridge motor drivers and LED constant-current circuits. IC Role / Device Role / Timing Role: Connected from gate-to-source, absorbing Miller-induced voltage spikes during fast switching transitions. Use Value: Clamps gate-source voltage to ≤10.2 V, avoiding gate oxide breakdown while maintaining <100 ps response time for sub-μs edge rates. |
| USB/UART Signal Line Protection | Automotive Body Control Module (BCM) Sensors |
|
Use Scenario: Protects 3.3 V or 5 V data lines (D+/D−, TX/RX) against ESD and cable discharge events in portable devices and docking stations. IC Role / Device Role / Timing Role: Placed in series with signal path or shunted to ground; leverages low capacitance (<100 pF at 0 V) to preserve signal integrity. Use Value: Withstands ±15 kV air-gap ESD per IEC 61000-4-2 without parameter shift, ensuring USB 2.0 eye diagram compliance and UART bit-error rate stability. |
Use Scenario: Guards LIN bus or analog sensor inputs (e.g., temperature, position) in BCMs exposed to battery transients and load dump. IC Role / Device Role / Timing Role: Mounted at connector interface, clamping 12 V supply rail surges up to 4 kW (8/20 μs) before reaching microcontroller ADC inputs. Use Value: Maintains VWM = 6.5 V margin below nominal 12 V system voltage, enabling robust operation across cold-crank (6.5 V) to load-dump (35 V) conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F6.0A-M3/6B | VWM = 6.0 V, VBR = 6.7–7.41 V, VC = 9.5 V @ 1500 A (10/1000 μs) | Lower clamping voltage but reduced standoff margin; better for 5 V systems with tighter tolerance. | Select when protecting 5 V logic rails where 6.0 V VWM provides optimal margin over 5.5 V max supply. |
| SMA6F7.5A-M3/6B | VWM = 7.5 V, VBR = 8.33–9.21 V, VC = 11.8 V @ 125 A (10/1000 μs) | Higher standoff and clamping; suited for 9–12 V systems with larger transient headroom. | Choose for 9 V or 12 V supply rails where 6.5 V VWM would risk premature conduction during normal ripple or cold-crank dips. |
Compared with SMA6F6.5A-M3/6B, SMA6F6.0A-M3/6B offers lower clamping at the cost of reduced overvoltage margin, while SMA6F7.5A-M3/6B increases system-level surge resilience but raises minimum operating voltage threshold-requiring careful validation against supply rail tolerances and fault thresholds.
Availability
SMA6F6.5A-M3/6B is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, consumer USB interfaces, and embedded sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA6F6.5A-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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMA6F series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy, low-profile surge suppression in space-constrained power and signal protection applications across automotive, industrial, and computing markets.
FAQ
What is the maximum clamping voltage of the SMA6F6.5A-M3/6B under an 8/20 μs surge?
The SMA6F6.5A-M3/6B has a maximum clamping voltage (VC) of 10.2 V when subjected to a 250 A peak pulse with an 8/20 μs waveform. This value is measured per IEC 61000-4-5 and confirmed in the Vishay datasheet revision 17-Sep-2021. The SMA6F6.5A-M3/6B maintains this clamping performance across its specified operating temperature range and is validated for repeated surge events without parameter drift.
Is the SMA6F6.5A-M3/6B suitable for bidirectional signal line protection?
No, the SMA6F6.5A-M3/6B is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics-including breakdown voltage, clamping behavior, and leakage current-are specified only for reverse-biased conduction. For bidirectional protection (e.g., RS-485, CAN), a dedicated bidirectional TVS such as SMBJ6.5CA or equivalent must be used instead of the SMA6F6.5A-M3/6B.
What is the thermal resistance (RθJA) of the SMA6F6.5A-M3/6B on a standard FR4 PCB?
The SMA6F6.5A-M3/6B exhibits a typical junction-to-ambient thermal resistance (RθJA) of 120–150 °C/W when mounted on a standard FR4 PCB with 2 oz. copper and the recommended footprint. This value is defined per JEDEC 51-2A and is critical for calculating power derating above 25 °C ambient. The SMA6F6.5A-M3/6B must be thermally modeled using this RθJA to ensure junction temperature remains ≤175 °C under worst-case surge duty cycles.
Does the SMA6F6.5A-M3/6B meet automotive AEC-Q200 requirements?
The SMA6F6.5A-M3/6B is not AEC-Q200 qualified. It is rated for industrial-grade operation (–55 °C to +175 °C junction temperature) and meets MSL Level 1 and IEC 61000-4-2 ESD standards, but it lacks the stress testing, failure analysis, and qualification documentation required for automotive use. For AEC-Q200-compliant alternatives, consult Vishay's Automotive TVS portfolio-do not substitute SMA6F6.5A-M3/6B in automotive safety-critical designs without formal qualification.
What does the "/6B" suffix indicate in SMA6F6.5A-M3/6B?
Within the SMA6F family, the "/6B" suffix denotes the preferred packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 14,000 units per reel. This contrasts with "/6A", which specifies a 7-inch reel containing 3,500 units. Both "/6A" and "/6B" share identical electrical, thermal, and mechanical specifications-the "/6B" designation applies solely to packaging and logistics, not device functionality. The SMA6F6.5A-M3/6B is fully interchangeable with SMA6F6.5A-M3/6A in circuit design.
SMA6F6.5A-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):
- 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-M3/6B FAQ
1.How can I place an order for SMA6F6.5A-M3/6B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F6.5A-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 SMA6F6.5A-M3/6B reliable?
The price and inventory of SMA6F6.5A-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 SMA6F6.5A-M3/6B is usually 5 days.
3.What payment methods are accepted for SMA6F6.5A-M3/6B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F6.5A-M3/6B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F6.5A-M3/6B?
SMA6F6.5A-M3/6B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F6.5A-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 SMA6F6.5A-M3/6B?
For technical support, including SMA6F6.5A-M3/6B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F6.5A-M3/6B requirements.
6.How does Aetrix verify that SMA6F6.5A-M3/6B is sourced from the original manufacturer or authorized distributors?
All SMA6F6.5A-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 SMA6F6.5A-M3/6B meets industry standards.
7.What is the process for return or replacement of SMA6F6.5A-M3/6B?
All SMA6F6.5A-M3/6B units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F6.5A-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 SMA6F6.5A-M3/6B part is unused and in its original packaging.
Return procedure for SMA6F6.5A-M3/6B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F6.5A-M3/6B Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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