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Vishay General Semiconductor - Diodes Division SMA6F70A-M3/I
- Part No.:
- SMA6F70A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F70A-M3/I.pdf
- Description:
- 600W,70V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,784
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Product details
Overview
SMA6F70A-M3/I 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 a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 113 V maximum clamping voltage (VC) at 5.3 A (10/1000 μs), 600 W peak pulse power rating, and ESD immunity per IEC 61000-4-2 level 4 (15 kV air / 8 kV contact).
For engineers reviewing the SMA6F70A-M3/I datasheet, SMA6F70A-M3/I pinout, SMA6F70A-M3/I application, or SMA6F70A-M3/I equivalent, this device is selected for robust overvoltage protection in DC power rails, sensor interfaces, and MOSFET gate drivers where low-profile mounting, high surge capability, and industrial-grade reliability are required.
Technical Context
This TVS diode operates as a unidirectional Zener-based clamp, activated when reverse voltage exceeds VBR. Its dynamic resistance (RD) is 5.09 Ω (typ.) at 10/1000 μs, enabling precise clamping with minimal overshoot under transient stress. The device is rated for TJ = -55 °C to +175 °C and meets MSL level 1 per J-STD-020.
It delivers 600 W peak pulse power (10/1000 μs) and 4 kW (8/20 μs), with thermal resistance RθJA = 120–150 °C/W (FR4 PCB, 2 oz.), supporting operation in compact, thermally constrained layouts. Polarity is marked by a cathode band; terminals are matte tin-plated and whisker-tested per JESD201 class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Ensures reliable turn-on above normal operating rail |
| VC @ IPP | 113 V at 5.3 A (10/1000 μs) - Limits downstream voltage during surge events |
| PPPM (10×1000 μs) | 600 W - Sustains standard lightning/surge test waveforms without failure |
| ID @ VWM | 0.2 μA max - Negligible leakage current preserves system efficiency |
| TJ max. | +175 °C - Enables use in high-temperature industrial and automotive under-hood environments |
| ESD Rating | IEC 61000-4-2 level 4: 15 kV (air), 8 kV (contact) - Protects against human-body ESD events |
Pinout & Package
Package: SlimSMA (DO-221AC), ultra-low profile (0.95 mm typical height), halogen-free, RoHS-compliant, industrial grade. Cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during clamping | Connected to protected line; conducts surge current to ground when V > VBR |
| Cathode | Reference terminal | Connected to system ground or lower-potential rail; polarity marking ensures correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (0.95 mm) | Enables placement in space-constrained PCBs, including portable and stacked-module designs |
| Peak pulse power: 4 kW (8/20 μs) | Withstands high-energy surges common in industrial motor drives and telecom line interfaces |
| MSL level 1, LF peak 260 °C | Compatible with standard lead-free reflow processes without preconditioning |
| Matte tin-plated leads | Ensures reliable solderability per J-STD-002 and JESD22-B102 |
| Junction temperature range: -55 °C to +175 °C | Supports deployment in extended-temperature environments such as factory automation and outdoor infrastructure |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
Use Scenario: Protection of gate driver ICs and microcontroller I/O lines from inductive kickback in 24 V solenoid and relay circuits. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across MOSFET gate-source or MCU input pins to limit transient voltage spikes. Use Value: Prevents latch-up or permanent damage during load switching, extending system lifetime in harsh electromagnetic environments. | Use Scenario: Surge suppression on LIN bus lines and sensor supply rails in door modules and seat control units. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing ISO 7637-2 pulse 1/2a/3a transients while maintaining signal integrity. Use Value: Maintains functional safety compliance without adding series impedance or propagation delay to low-speed control signals. |
| Consumer Power Adapters | Telecom Interface Protection |
Use Scenario: Input-stage overvoltage protection for AC/DC adapters handling universal mains input (90–264 VAC). IC Role / Device Role / Timing Role: Primary-side TVS suppressing fast-rising line transients before they reach rectifier and controller ICs. Use Value: Reduces need for oversized input capacitors and improves pass/fail margin in EN 61000-4-5 testing. | Use Scenario: Secondary-side protection of Ethernet PHY power rails and RS-485 transceiver VCC pins. IC Role / Device Role / Timing Role: Low-capacitance TVS limiting induced surges from cable coupling without degrading signal rise time. Use Value: Preserves data integrity at 10/100 Mbps rates while meeting IEC 61000-4-5 level 3 (1 kV/2 kV) requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F70A-M3/6B | Same electrical specs; differs only in tape-and-reel packaging (6B = 7" reel, 3500 pcs; M3/I = 13" reel, 14000 pcs) | No functional difference; identical performance and footprint | Select M3/I for high-volume production requiring larger reels and reduced changeover frequency. |
| SMAJ70A-M3/5B | Higher clamping voltage (115 V vs. 113 V), same VWM/VBR, but lower PPPM (400 W vs. 600 W); DO-214AC (SMA) package, not SlimSMA | Less effective for high-energy transients; requires PCB layout change due to larger body and different pad geometry | Use only if SlimSMA footprint is not required and surge energy is limited to <400 W. |
Compared with SMA6F70A-M3/6B, the SMA6F70A-M3/I offers identical protection performance with optimized logistics for volume manufacturing; versus SMAJ70A-M3/5B, it delivers 50 % higher surge power handling and fits into tighter board spaces, making it preferable for next-generation compact power electronics.
Availability
SMA6F70A-M3/I is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and consumer power adapter designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for SMA6F70A-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 SMA6FxxA family is engineered for high-surge, low-profile transient suppression in DC power and signal lines across industrial, automotive, and consumer systems-prioritizing clamping precision, thermal robustness, and automated assembly compatibility.
FAQ
What is the maximum clamping voltage of the SMA6F70A-M3/I under a 10/1000 μs surge?
The SMA6F70A-M3/I has a maximum clamping voltage (VC) of 113 V at 5.3 A under a 10/1000 μs waveform. This value is measured per standard test conditions and reflects the peak voltage seen across the device during that transient event. The SMA6F70A-M3/I maintains this clamping performance across its specified junction temperature range and is validated per JEDEC test methods.
Is the SMA6F70A-M3/I suitable for automotive applications?
Yes, the SMA6F70A-M3/I is suitable for automotive body electronics applications such as LIN bus protection and sensor supply rail clamping. It meets AEC-Q101 stress test requirements (as part of the qualified SMA6FxxA family), operates from -55 °C to +175 °C, and withstands ISO 7637-2 pulse waveforms when properly applied. The SMA6F70A-M3/I is not intended for safety-critical powertrain functions unless explicitly qualified.
Does the SMA6F70A-M3/I have bidirectional capability?
No, the SMA6F70A-M3/I is a unidirectional TVS diode only. Its electrical characteristics-including breakdown voltage, clamping behavior, and leakage-are specified for reverse-biased operation. Forward conduction follows standard silicon diode behavior (~0.85 V VF), but it is not rated or characterized for bidirectional surge suppression. For bidirectional protection, a separate part number (e.g., SMA6F70CA) must be used.
What is the thermal resistance junction-to-ambient (RθJA) for the SMA6F70A-M3/I?
The SMA6F70A-M3/I 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 pad layout. This value assumes no additional heatsinking and is critical for calculating safe power derating above 25 °C ambient. The SMA6F70A-M3/I's low RθJM (12–15 °C/W) supports efficient heat transfer to the PCB ground plane.
How does the M3/I suffix affect the SMA6F70A-M3/I's specifications?
"M3" denotes halogen-free, RoHS-compliant, industrial-grade construction with matte tin plating and JESD201 class 2 whisker resistance. "I" specifies the tape-and-reel packaging format: 13-inch diameter reel containing 14,000 units. Neither suffix alters electrical or thermal specifications-the SMA6F70A-M3/I shares identical VWM, VBR, VC, PPPM, and TJ ratings with other M3-suffixed variants like SMA6F70A-M3/6B.
SMA6F70A-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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- 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)
SMA6F70A-M3/I FAQ
1.How can I place an order for SMA6F70A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F70A-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 SMA6F70A-M3/I reliable?
The price and inventory of SMA6F70A-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 SMA6F70A-M3/I is usually 5 days.
3.What payment methods are accepted for SMA6F70A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F70A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F70A-M3/I?
SMA6F70A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F70A-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 SMA6F70A-M3/I?
For technical support, including SMA6F70A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F70A-M3/I requirements.
6.How does Aetrix verify that SMA6F70A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMA6F70A-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 SMA6F70A-M3/I meets industry standards.
7.What is the process for return or replacement of SMA6F70A-M3/I?
All SMA6F70A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F70A-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 SMA6F70A-M3/I part is unused and in its original packaging.
Return procedure for SMA6F70A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F70A-M3/I Tags
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