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Vishay General Semiconductor - Diodes Division SMA6F85A-M3/I
- Part No.:
- SMA6F85A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F85A-M3/I.pdf
- Description:
- 600W,85V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,775
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Product details
Overview
SMA6F85A-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 85 V stand-off voltage (VWM), 94.4–104 V breakdown voltage (VBR at 1 mA), 136 V maximum clamping voltage (VC) at 7.27 A (10/1000 μs), 600 W peak pulse power, and IEC 61000-4-2 Level 4 ESD protection (15 kV air / 8 kV contact). It is used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMA6F85A-M3/I datasheet, SMA6F85A-M3/I pinout, SMA6F85A-M3/I application, or SMA6F85A-M3/I equivalent, key selection criteria include clamping performance at 85 V operating level, SlimSMA footprint compatibility with automated placement, thermal derating above 25 °C, and compliance with MSL Level 1 reflow profile (260 °C peak).
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transient overvoltages before they damage downstream components. Its unidirectional polarity enables use on DC-biased lines where reverse conduction must be blocked until breakdown threshold is exceeded.
The device delivers 600 W peak pulse power under 10/1000 μs waveform and 4 kW under 8/20 μs surge, with dynamic resistance of 4.4 Ω enabling low-voltage clamping at high currents. Junction temperature range spans –55 °C to +175 °C, supporting operation in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before leakage exceeds 0.2 μA |
| VBR (min/max) | 94.4 V / 104 V at 1 mA - Ensures reliable turn-on within defined tolerance band at rated test current |
| VC @ IPP (10/1000 μs) | 136 V at 7.27 A - Clamps surge to safe level for protected ICs with margin below absolute max ratings |
| Peak Pulse Power | 600 W (10/1000 μs) - Sustains single transient events without degradation under standard lightning surge test |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - Meets industrial immunity requirements for user-accessible ports |
| Thermal Resistance | RθJA = 120–150 °C/W - Determines junction temperature rise under steady-state power dissipation on FR4 PCB |
| Package | SlimSMA (DO-221AC) - 0.95 mm typical height enables ultra-thin board designs and high-density layout |
Pinout & Package
SlimSMA (DO-221AC) package with cathode band marking; two-terminal device with anode and cathode leads optimized for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to lower-potential side of protected line | Enables bidirectional blocking in unidirectional configuration - only conducts when cathode-to-anode voltage exceeds VBR |
| Cathode | Current exit terminal during avalanche clamping; marked by color band | Defines polarity orientation on PCB - must align with circuit's reference ground or negative rail for correct transient shunting |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (0.95 mm typical height) | Enables integration into space-constrained modules such as IoT edge sensors and portable telecom interfaces |
| MSL Level 1 rating (260 °C peak reflow) | Supports single-pass lead-free reflow without moisture-induced failure or delamination |
| Halogen-free, RoHS-compliant, industrial-grade construction | Meets environmental compliance mandates for global industrial and telecom deployments |
| Matte tin-plated leads (J-STD-002/JESD22-B102 compliant) | Ensures robust solder joint reliability and long-term intermetallic stability in thermal cycling environments |
| Junction temperature range: –55 °C to +175 °C | Validates operation across automotive under-hood, industrial motor drive, and base station RF front-end conditions |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protecting gate drivers and bus voltage sense circuits from switching transients generated by IGBTs in variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or gate resistor to clamp inductive kickback spikes. Use Value: Limits transient overshoot to ≤136 V, preventing gate oxide rupture in 100 V-rated MOSFETs and ensuring system uptime in factory automation. |
Use Scenario: Safeguarding 48 V DC input stage of PoE-powered switches against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary-level TVS on power input rail, coordinated with secondary-side protection for layered immunity. Use Value: Absorbs 4 kW (8/20 μs) surges per IEC 61000-4-5, maintaining <100 ns response time to preserve upstream DC-DC converter integrity. |
| Automotive Body Control Modules | Consumer Sensor Hubs |
Use Scenario: Shielding LIN bus transceivers and microcontroller I/O pins from load dump and alternator ripple in vehicle body electronics. IC Role / Device Role / Timing Role: Point-of-use TVS on each protected signal line, leveraging low capacitance (<100 pF) to avoid signal distortion. Use Value: Withstands 175 °C junction temperature and meets AEC-Q200 stress testing, enabling under-hood deployment without derating. |
Use Scenario: Protecting analog outputs of MEMS accelerometers and temperature sensors in smart home hubs exposed to ESD during handling. IC Role / Device Role / Timing Role: ESD suppression element on sensor output traces, placed immediately before connector interface. Use Value: Provides 8 kV contact / 15 kV air discharge immunity per IEC 61000-4-2, eliminating field failures due to human-body-model discharges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F85A-M3/H | Identical electrical specs; differs only in tape-and-reel packaging (3500 pcs/reel vs. 14000 pcs/reel) | No functional difference - same SlimSMA footprint, thermal performance, and clamping behavior | Select SMA6F85A-M3/H for prototyping or low-volume production requiring smaller reels |
| SMA6F85AHE3/A/H | Same VWM, VBR, and VC; uses standard SMA (DO-214AC) instead of SlimSMA (DO-221AC); 2.3 mm height vs. 0.95 mm | Higher profile limits use in ultra-thin assemblies; otherwise identical surge handling and ESD rating | Choose SMA6F85AHE3/A/H only if legacy SMA footprint is required and board height budget allows ≥2.3 mm |
Compared with SMA6F85A-M3/I, SMA6F85A-M3/H offers identical protection in smaller reel quantities, while SMA6F85AHE3/A/H trades compactness for broader industry-standard footprint availability - neither is pin-compatible due to differing package outlines (DO-221AC vs. DO-214AC).
Availability
SMA6F85A-M3/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and consumer sensor hubs requiring stable component supply and guaranteed MSL Level 1 compliance.
Supply support for SMA6F85A-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 and application-specific performance.
The SMA6F series targets high-energy transient suppression in space-constrained, high-reliability systems - engineered for robust clamping, low-profile mounting, and seamless integration into automated SMT lines.
FAQ
What is the clamping voltage of SMA6F85A-M3/I at its rated peak pulse current?
The SMA6F85A-M3/I has a maximum clamping voltage (VC) of 136 V at 7.27 A peak pulse current under the 10/1000 μs waveform. This value is measured per standard test conditions and ensures protected downstream components remain within safe operating voltage margins during transient events. The SMA6F85A-M3/I achieves this with a dynamic resistance of 4.4 Ω, contributing to predictable and repeatable clamping behavior across production lots.
Does SMA6F85A-M3/I support lead-free reflow soldering?
Yes, SMA6F85A-M3/I is qualified to MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, making it fully compatible with standard lead-free soldering processes. Its matte tin-plated terminals meet J-STD-002 and JESD22-B102 solderability requirements, and the molding compound complies with UL 94 V-0 flammability rating. The SMA6F85A-M3/I also passes JESD201 Class 2 whisker testing, ensuring long-term interconnect reliability.
How does the SlimSMA (DO-221AC) package of SMA6F85A-M3/I differ from standard SMA (DO-214AC)?
The SlimSMA (DO-221AC) package used by SMA6F85A-M3/I has a typical height of 0.95 mm versus 2.3 mm for standard SMA (DO-214AC), enabling significantly lower profile board designs. While both share similar outline length and width, SlimSMA features tighter lead spacing and optimized thermal pad geometry. The SMA6F85A-M3/I is not mechanically interchangeable with DO-214AC parts - PCB land patterns and pick-and-place tooling must be specifically configured for DO-221AC.
What is the maximum operating junction temperature for SMA6F85A-M3/I?
The SMA6F85A-M3/I has a maximum operating junction temperature (TJ) of +175 °C, verified per JEDEC standards and supported by its thermal resistance characteristics (RθJA = 120–150 °C/W). This rating allows reliable operation in high-ambient environments such as automotive engine compartments or industrial power converters. Derating curves in the datasheet confirm usable power dissipation down to 0 W at 175 °C ambient when mounted on FR4 with 2 oz. copper, and the SMA6F85A-M3/I maintains full specification compliance across its full –55 °C to +175 °C junction range.
Is SMA6F85A-M3/I suitable for protecting RS-485 communication lines?
Yes, SMA6F85A-M3/I is suitable for protecting RS-485 transceivers when applied across differential pairs or individual lines referenced to ground, provided system common-mode voltage remains within its 85 V stand-off rating. Its low clamping voltage (136 V), fast response time (<1 ns), and low junction capacitance (<100 pF at zero bias) minimize signal distortion. For full-duplex RS-485, two SMA6F85A-M3/I devices (one per line) are typically used - the SMA6F85A-M3/I's unidirectional polarity matches standard RS-485 DC bias configurations.
SMA6F85A-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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 136V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- 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)
SMA6F85A-M3/I FAQ
1.How can I place an order for SMA6F85A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F85A-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 SMA6F85A-M3/I reliable?
The price and inventory of SMA6F85A-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 SMA6F85A-M3/I is usually 5 days.
3.What payment methods are accepted for SMA6F85A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F85A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F85A-M3/I?
SMA6F85A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F85A-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 SMA6F85A-M3/I?
For technical support, including SMA6F85A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F85A-M3/I requirements.
6.How does Aetrix verify that SMA6F85A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMA6F85A-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 SMA6F85A-M3/I meets industry standards.
7.What is the process for return or replacement of SMA6F85A-M3/I?
All SMA6F85A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F85A-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 SMA6F85A-M3/I part is unused and in its original packaging.
Return procedure for SMA6F85A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F85A-M3/I Tags
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