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Vishay General Semiconductor - Diodes Division SMA6F85A-M3/H
- Part No.:
- SMA6F85A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F85A-M3/H.pdf
- Description:
- 600W,85V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:457
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Product details
Overview
SMA6F85A-M3/H 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), 136 V maximum clamping voltage 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).
For engineers reviewing the SMA6F85A-M3/H datasheet, SMA6F85A-M3/H pinout, SMA6F85A-M3/H application, or SMA6F85A-M3/H equivalent, this device is selected for robust overvoltage protection in industrial sensor interfaces, telecom power rails, and automotive control modules where low-profile mounting and high surge immunity are critical.
Technical Context
This TVS diode operates as a unidirectional clamping device with Zener-based avalanche breakdown. Its electrical behavior is defined by precise VBR (94.4–104 V at 1 mA), low dynamic resistance (4.4 Ω typical), and temperature-stable voltage coefficient (αT = 10.6 × 10⁻⁴ /°C), enabling predictable clamping across -55 °C to +175 °C junction range.
The SlimSMA (DO-221AC) package supports automated placement with 0.95 mm profile and meets MSL level 1 (260 °C reflow). It delivers 4 kW surge capability under 8/20 μs waveform and maintains <0.2 μA leakage at 85 V, ensuring minimal standby power impact in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 94.4 V / 104 V at 1 mA - Ensures reliable turn-on above normal operating rail |
| VC @ IPPM (10/1000 μs) | 136 V at 7.27 A - Clamps transient energy while limiting downstream voltage stress |
| PPPM (10/1000 μs) | 600 W - Sustains standard lightning-surge energy without failure |
| ESD Rating | IEC 61000-4-2 Level 4: 15 kV air / 8 kV contact - Protects against human-body model discharges |
| Package | SlimSMA (DO-221AC) - 0.95 mm height enables ultra-thin PCB designs and high-density layouts |
| Junction Temp Range | -55 °C to +175 °C - Supports operation in under-hood automotive and industrial environments |
Pinout & Package
SlimSMA (DO-221AC) package with cathode band marking; anode and cathode terminals aligned for standard surface-mount footprint per JEDEC DO-221AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction; tied to system ground in unidirectional TVS configuration | Provides low-impedance path to ground when clamping positive transients on cathode-side rail |
| Cathode | Protected line connection; receives transient voltage to be clamped | Connected to supply rail or signal line requiring overvoltage protection; color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SlimSMA package | 0.95 mm height enables use in space-constrained consumer and portable electronics |
| High 4 kW surge rating (8/20 μs) | Withstands telecom-grade lightning surges without degradation or parametric shift |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking or special handling |
| Halogen-free, RoHS-compliant construction | Meets environmental compliance requirements for industrial and EU-market products |
| 175 °C max junction temperature | Enables reliable operation in high-ambient-temperature environments like motor drives and power supplies |
Applications
| Industrial Sensor Interface | Telecom Power Rail Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes induced by relay coil de-energization or nearby motor starts. Use Value: Prevents sensor IC latch-up or ADC input damage by limiting voltage excursion to ≤136 V during 600 W surges. | Use Scenario: Safeguarding 48 V DC power inputs of VoIP gateways and base station backhaul equipment against lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input bulk rail, coordinated with upstream fuse and downstream DC-DC converter. Use Value: Absorbs 4 kW (8/20 μs) surges while maintaining <0.2 μA leakage at nominal 48 V, avoiding standby current penalty. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
Use Scenario: Shielding LIN bus transceivers and microcontroller I/O pins from load-dump transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor placed at connector entry point before ESD protection and filtering. Use Value: Clamps 136 V within nanoseconds, preserving signal integrity and meeting ISO 16750-2 pulse 5a requirements. | Use Scenario: Protecting microcontroller GPIOs and Hall-effect rotor position sensors in smart washing machine motor inverters. IC Role / Device Role / Timing Role: Secondary-level transient suppression on low-voltage control signals adjacent to high-current switching nodes. Use Value: Survives repeated 600 W surges without parameter drift, supporting 10+ year appliance lifecycle under harsh EMI 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 |
|---|---|---|---|
| SMA6F85A-M3/6B | Same electrical specs; differs only in tape-and-reel packaging (14,000 pcs/reel vs. 3,500 pcs/reel) and package code suffix | Identical functional performance; used interchangeably where volume procurement favors larger reels | Select SMA6F85A-M3/6B for high-volume production runs requiring fewer reel changes. |
| SMAJ85A-M3/61 | Same VWM/VBR/VC ratings but in larger SMA (DO-214AC) package; 1.5 mm height vs. 0.95 mm; RθJA = 100 °C/W vs. 120–150 °C/W | Better thermal dissipation in high-power ambient, but incompatible with ultra-low-profile layouts | Choose SMAJ85A-M3/61 only when board height >1.5 mm is acceptable and higher thermal margin is required. |
Compared with SMA6F85A-M3/H, SMA6F85A-M3/6B offers identical protection in a higher-volume reel format, while SMAJ85A-M3/61 trades slimness for improved thermal resistance-making the H-suffix version optimal for space-constrained, high-density designs where 0.95 mm profile is mandatory.
Availability
SMA6F85A-M3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom power rail protection, and automotive body control modules requiring stable component supply and long-term manufacturability.
Supply support for SMA6F85A-M3/H 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, MOSFETs, and protection devices with emphasis on reliability and application-specific optimization.
The SMA6F series is engineered for high-energy transient suppression in compact surface-mount formats, targeting design-in across automotive, industrial, and communications infrastructure where low profile and high surge immunity are jointly critical.
FAQ
What is the maximum clamping voltage of the SMA6F85A-M3/H under a 10/1000 μs surge?
The SMA6F85A-M3/H has a maximum clamping voltage (VC) of 136 V when subjected to a 7.27 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 89458) and defines the upper voltage limit imposed on protected circuitry during such transients. The SMA6F85A-M3/H achieves this clamping performance while maintaining low dynamic resistance (4.4 Ω typical), ensuring consistent response across its operating temperature range.
Is the SMA6F85A-M3/H suitable for automotive applications?
Yes, the SMA6F85A-M3/H is suitable for automotive applications including body control modules and infotainment power supplies. Its -55 °C to +175 °C operating junction temperature range, AEC-Q101 alignment (per Vishay qualification practices), and ability to withstand load-dump transients make it appropriate for under-hood and cabin environments. The SMA6F85A-M3/H also meets IEC 61000-4-2 Level 4 ESD requirements, supporting robustness against assembly-line and end-user electrostatic events in automotive electronics.
Does the SMA6F85A-M3/H have bidirectional capability?
No, the SMA6F85A-M3/H is a unidirectional TVS diode, intended for clamping positive transients on a grounded-cathode configuration. It does not provide symmetrical protection for AC or bipolar signal lines. For bidirectional protection, engineers must select a dedicated bidirectional variant such as the SMA6F85CA-M3/H or use back-to-back unidirectional devices. The SMA6F85A-M3/H polarity is marked by a cathode band and must be oriented correctly in-circuit to avoid forward conduction during normal operation.
What is the leakage current specification for the SMA6F85A-M3/H at rated stand-off voltage?
The SMA6F85A-M3/H exhibits a maximum reverse leakage current (ID) of 0.2 μA at its 85 V stand-off voltage (VWM), tested at 25 °C. This ultra-low leakage ensures negligible power loss in battery-powered or energy-sensitive systems. The value remains stable up to 85 °C, with leakage increasing predictably per temperature coefficient data in the Vishay datasheet. This performance makes the SMA6F85A-M3/H suitable for always-on monitoring circuits where standby current budget is tightly constrained.
How does the SlimSMA (DO-221AC) package of the SMA6F85A-M3/H compare thermally to standard SMA packages?
The SlimSMA (DO-221AC) package of the SMA6F85A-M3/H has a higher thermal resistance junction-to-ambient (RθJA = 120–150 °C/W) compared to standard SMA (DO-214AC) packages (~100 °C/W), due to reduced copper pad area and thinner mold compound. However, its lower profile (0.95 mm) improves airflow and reduces mechanical stress in thin assemblies. For the SMA6F85A-M3/H, thermal design should prioritize adequate copper pour and via stitching beneath the cathode/anode pads to mitigate temperature rise during repetitive surge events.
SMA6F85A-M3/H 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/H FAQ
1.How can I place an order for SMA6F85A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F85A-M3/H 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/H reliable?
The price and inventory of SMA6F85A-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMA6F85A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F85A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F85A-M3/H?
SMA6F85A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F85A-M3/H 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/H?
For technical support, including SMA6F85A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F85A-M3/H requirements.
6.How does Aetrix verify that SMA6F85A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMA6F85A-M3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMA6F85A-M3/H?
All SMA6F85A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F85A-M3/H, 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/H part is unused and in its original packaging.
Return procedure for SMA6F85A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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