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Vishay General Semiconductor - Diodes Division SMA6F64A-M3/I
- Part No.:
- SMA6F64A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F64A-M3/I.pdf
- Description:
- 600W,64V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,621
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Product details
Overview
SMA6F64A-M3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the SlimSMA (DO-221AC) package, designed for clamping voltage transients on power and signal lines. It features a 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, 103 V maximum clamping voltage (VC) at 5.8 A (10/1000 μs), 600 W peak pulse power rating, and IEC 61000-4-2 Level 4 ESD protection (15 kV air / 8 kV contact).
For engineers reviewing the SMA6F64A-M3/I datasheet, SMA6F64A-M3/I pinout, SMA6F64A-M3/I application, or SMA6F64A-M3/I equivalent, this device is selected for robust overvoltage protection in space-constrained consumer, industrial, and telecom power rails where low-profile mounting, high surge immunity, and halogen-free RoHS compliance are required.
Technical Context
This TVS diode operates as a unidirectional clamping device with Zener-based avalanche breakdown behavior. Its electrical response is defined by three key voltage thresholds: VWM (64 V), VBR (min 71.1 V), and VC (103 V at 5.8 A), enabling precise coordination with downstream ICs' absolute maximum ratings.
Thermal performance is characterized by RθJA = 120–150 °C/W (FR4 PCB, 2 oz.), TJ max = 175 °C, and PD = 8 W at TM = 55 °C. The M3 suffix confirms halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before leakage exceeds 0.2 μA; sets upper limit for normal circuit operation. |
| VBR (min/max) | 71.1 V / 78.6 V at 1 mA - Breakdown onset range; ensures reliable turn-on above VWM with margin against tolerance drift. |
| VC @ IPPM | 103 V at 5.8 A (10/1000 μs) - Clamped voltage seen by protected circuit during worst-case surge; defines safe stress level for downstream components. |
| PPPM (10/1000 μs) | 600 W - Peak transient energy handling capability under standard lightning surge waveform; determines survivability in IEC 61000-4-5 tests. |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - Confirmed immunity to human-body-model electrostatic discharge events without degradation. |
| Package | SlimSMA (DO-221AC) - 2.70 mm × 4.35 mm footprint, 0.95 mm typical height; enables automated placement in ultra-thin designs. |
| Polarity | Cathode band marked - Unidirectional conduction; anode-to-cathode forward bias allows DC path only when clamping positive transients. |
Pinout & Package
SlimSMA (DO-221AC) package: surface-mount, two-terminal, cathode-band-marked case with matte tin-plated leads. Dimensions: 2.70 mm × 4.35 mm × 0.95 mm (L × W × H), compliant with JEDEC DO-221AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line (e.g., VBUS, signal source) | Connected to line requiring transient suppression; reverse-biased during normal operation; conducts during positive overvoltage events. |
| Cathode | Return path to ground or lower-potential rail | Provides low-impedance shunt path to ground during clamping; must be routed with minimal inductance to preserve VC performance. |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (0.95 mm typical height) | Enables use in slim consumer electronics (e.g., smartphones, wearables) where board thickness is constrained. |
| Peak pulse power: 600 W (10/1000 μs) | Supports IEC 61000-4-5 Level 3 surge immunity (1 kV line-to-ground) on 12–24 V supply rails without derating. |
| IEC 61000-4-2 Level 4 ESD protection | Eliminates need for additional discrete ESD diodes on USB, HDMI, or sensor interfaces in industrial end-equipment. |
| M3 suffix: halogen-free, RoHS-compliant, industrial grade | Meets global environmental regulations and reliability requirements for automotive-adjacent and long-lifecycle industrial applications. |
| MSL Level 1 (J-STD-020), 260 °C reflow compatible | Allows single-pass lead-free reflow assembly without moisture sensitivity concerns or baking preconditioning. |
Applications
| USB Power Delivery Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protects 20 V USB PD input stage from load dump and hot-swap surges in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive transients on VBUS line while remaining non-conductive during normal 5–20 V operation. Use Value: Limits clamped voltage to ≤103 V, ensuring downstream buck converter and USB controller ICs remain within absolute maximum ratings. |
Use Scenario: Shields 4–20 mA analog sensor outputs from ESD and switching noise in factory automation PLC modules. IC Role / Device Role / Timing Role: Placed across sensor output and ground to clamp fast transients (<10 ns rise time) induced by relay coil switching. Use Value: With 8 kV contact ESD immunity and 103 V clamping, prevents latch-up or damage to precision op-amps and ADC front-ends. |
| Telecom PoE+ Midspan Surge Guard | Consumer Appliance Motor Drive Supply Clamp |
Use Scenario: Installed on Ethernet data pairs and power pins of IEEE 802.3at PoE+ midspan injectors to meet UL 60950-1 surge requirements. IC Role / Device Role / Timing Role: Acts as primary line-side transient suppressor before integrated PoE controller ICs and isolation transformers. Use Value: 600 W 10/1000 μs rating handles combined common-mode and differential surges up to 1.5 kV without thermal runaway. |
Use Scenario: Mounted across DC bus of BLDC motor driver in smart home appliances to absorb inductive kickback from MOSFET switching. IC Role / Device Role / Timing Role: Provides fast-response clamping (ns-scale) to protect gate drivers and MCU I/O from >100 V spikes during PWM commutation. Use Value: Low dynamic resistance (4.21 Ω) ensures stable clamping voltage even under high di/dt conditions, reducing stress on 650 V Si MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F64AHE3/52 (Vishay) | Same VWM/VBR/VC specs; differs in packaging (tape-and-reel vs. bulk), no M3 suffix - not halogen-free or JESD201 Class 2 whisker rated. | Acceptable for commercial-grade, non-industrial applications where RoHS/halogen-free compliance is not mandated. | Select SMA6F64A-M3/I when full industrial qualification (MSL 1, whisker resistance, halogen-free) is required for long-term reliability. |
| SMCJ64A (Bourns) | Higher package (DO-214AB), larger footprint (7.11 mm × 6.22 mm), higher VC (104 V), same 600 W rating but 20% taller (2.6 mm). | Used where board space permits larger devices and thermal mass improves sustained surge handling; not suitable for ultra-low-profile layouts. | Choose SMA6F64A-M3/I for space-constrained designs needing <1 mm height; choose SMCJ64A only if thermal derating margin or legacy footprint compatibility is critical. |
Compared with SMA6F64AHE3/52, the SMA6F64A-M3/I adds halogen-free materials and whisker-resistant plating for industrial longevity; compared with SMCJ64A, it delivers identical surge protection in 40% less board area and half the height, enabling next-generation compact power systems.
Availability
SMA6F64A-M3/I is available at Aetrix Electronics and suitable for USB PD input protection, industrial sensor interface hardening, and telecom PoE+ surge guard applications requiring stable component supply, consistent M3-grade material compliance, and verified SlimSMA package integrity.
Supply support for SMA6F64A-M3/I 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 transient suppression in space-constrained surface-mount applications across consumer, industrial, and communications infrastructure.
FAQ
What is the maximum clamping voltage of the SMA6F64A-M3/I under a 10/1000 μs surge?
The SMA6F64A-M3/I has a maximum clamping voltage (VC) of 103 V at 5.8 A under the 10/1000 μs waveform. This value is measured per the standard test condition specified in the Vishay datasheet (Document Number: 89458), and represents the peak voltage imposed on the protected circuit during that transient event. The SMA6F64A-M3/I maintains this clamping performance across its qualified operating temperature range.
Does the SMA6F64A-M3/I support bidirectional transient suppression?
No, the SMA6F64A-M3/I is a unidirectional TVS diode, as explicitly stated in the Vishay datasheet. It provides clamping only for positive transients relative to ground (anode-to-cathode polarity). For bidirectional protection, a separate device such as the SMA6F64CA-M3/I would be required. The SMA6F64A-M3/I's polarity is indicated by a cathode band on the SlimSMA package.
What does the "M3" suffix signify in SMA6F64A-M3/I?
The "M3" suffix denotes Vishay's industrial-grade construction: halogen-free molding compound, RoHS compliance, and matte tin-plated leads qualified to JESD201 Class 2 for whisker resistance. It also meets MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C. The SMA6F64A-M3/I is therefore suitable for high-reliability industrial and automotive-adjacent applications where long-term stability is critical.
Can the SMA6F64A-M3/I be used in place of SMA6F64A-M3/6A?
No - SMA6F64A-M3/6A is not a valid part number. Per the Vishay ordering table, SMA6F64A uses package codes "H" and "I", not "6A" (which applies only to SMA6F5.0A–SMA6F20A). The SMA6F64A-M3/I is the correct, manufacturer-specified orderable version for this voltage grade, with 14,000-unit tape-and-reel packaging on 13-inch reels. Using an invalid suffix risks procurement of incorrect or non-existent material.
What is the thermal resistance junction-to-ambient (RθJA) for the SMA6F64A-M3/I?
The SMA6F64A-M3/I has a typical 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 pad layout. This value is measured per JEDEC 51-2A and directly impacts power derating - for example, at 70 °C ambient, the device's usable power dissipation drops to ~5.3 W based on its 175 °C max junction temperature. The SMA6F64A-M3/I's thermal performance is fully characterized in the Vishay datasheet (Rev. 17-Sep-2021).
SMA6F64A-M3/I 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 5.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
SMA6F64A-M3/I FAQ
1.How can I place an order for SMA6F64A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F64A-M3/I 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 SMA6F64A-M3/I reliable?
The price and inventory of SMA6F64A-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F64A-M3/I is usually 5 days.
3.What payment methods are accepted for SMA6F64A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F64A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F64A-M3/I?
SMA6F64A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F64A-M3/I 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 SMA6F64A-M3/I?
For technical support, including SMA6F64A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F64A-M3/I requirements.
6.How does Aetrix verify that SMA6F64A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMA6F64A-M3/I 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 SMA6F64A-M3/I meets industry standards.
7.What is the process for return or replacement of SMA6F64A-M3/I?
All SMA6F64A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F64A-M3/I, 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 SMA6F64A-M3/I part is unused and in its original packaging.
Return procedure for SMA6F64A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F64A-M3/I Tags
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