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Vishay General Semiconductor - Diodes Division SMA6J8.5A-M3/61
- Part No.:
- SMA6J8.5A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J8.5A-M3/61.pdf
- Description:
- TVS DIODE 8.5VWM 13.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,879
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Product details
Overview
SMA6J8.5A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in SMA (DO-214AC) package, with 8.5 V stand-off voltage (VWM), 9.4–10.4 V breakdown voltage (VBR at IT = 1 mA), and 13.3 V maximum clamping voltage (VC) at 45.1 A peak pulse current (IPP) under 10/1000 μs waveform. It delivers 600 W peak pulse power and is rated for 150 °C junction temperature, used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and telecom equipment.
For engineers reviewing the SMA6J8.5A-M3/61 datasheet, SMA6J8.5A-M3/61 pinout, SMA6J8.5A-M3/61 application, or SMA6J8.5A-M3/61 equivalent, key selection considerations include clamping performance at 45.1 A IPP, unidirectional polarity, M3 halogen-free RoHS compliance, and thermal resistance (RθJA = 120 °C/W) under PCB-mounted conditions.
Technical Context
This device operates as a voltage-clamped avalanche diode, triggered when reverse voltage exceeds its specified VBR range (9.4–10.4 V). Its dynamic resistance (RD = 0.064 Ω) enables low-voltage overshoot during transient suppression, and its 13.3 V VC at 45.1 A ensures robust protection of downstream 3.3 V or 5 V logic interfaces.
Designed for surface-mount automation, it meets J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker testing. The SMA (DO-214AC) package uses matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, with cathode indicated by a color band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 8.5 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 9.4–10.4 V at 1 mA - Avalanche initiation range; defines minimum overvoltage triggering point |
| VC (Clamping Voltage) | 13.3 V at 45.1 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge |
| PPPM (10/1000 μs) | 600 W - Sustained transient energy handling capability on standard PCB copper pads (5 mm × 5 mm) |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient; determines derating above 25 °C ambient |
| Polarity | Unidirectional - Blocks reverse surges only; requires correct orientation relative to protected line |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.54 mm lead pitch and 1.88 mm pad width |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional, with cathode denoted by color band. Terminals are matte tin-plated leads compatible with standard reflow profiles (LF peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-impedance return path; carries surge current during clamping |
| Cathode | Reverse-biased terminal | Connected to protected line; voltage referenced to anode; marked by color band |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables high-density PCB layouts and compatibility with automated pick-and-place systems |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declarations and environmental compliance for industrial end equipment |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics |
| 150 °C maximum junction temperature | Supports operation in high-ambient environments such as enclosed industrial controllers or telecom base stations |
| Dynamic resistance of 0.064 Ω | Minimizes voltage overshoot during fast-rising transients, improving protection margin for 3.3 V I/O |
Applications
| Industrial Motor Drives | Telecom Power Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensing lines against flyback voltage from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across MOSFET gate-source or op-amp input pins. Use Value: Limits transient excursions to ≤13.3 V, preventing latch-up or oxide damage in 5 V-rated control ICs. |
Use Scenario: Surge suppression on -48 V DC power feed lines entering telecom shelf management units. IC Role / Device Role / Timing Role: Primary-level transient suppressor mounted at board edge before DC-DC converter input. Use Value: Absorbs 600 W (10/1000 μs) surges while maintaining <1 μA leakage at nominal -48 V system voltage. |
| Automotive Body Control Modules | Consumer Sensor Signal Conditioning |
Use Scenario: Protection of LIN bus transceivers and microcontroller GPIOs exposed to load dump or ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rail and bidirectional data lines (with external series resistor). Use Value: Clamps 8.5 V standby rail to 13.3 V within 1 ns response time, preserving signal integrity during pulse group 3a/b events. |
Use Scenario: ESD and switching transient protection for analog outputs of MEMS pressure sensors in HVAC controllers. IC Role / Device Role / Timing Role: Point-of-entry suppressor on 3.3 V analog output line driving long cables to display modules. Use Value: Maintains <100 nA leakage at 3.3 V, avoiding offset error in 16-bit ADC front-end circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J8.5A-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Acceptable where halogen-free requirement is not mandated (e.g., non-EU commercial products) | Select E3 for cost-sensitive, non-halogen-restricted designs; verify M3 compliance for IPC-1752A reporting |
| SMB6J8.5A-M3/5A | Same VWM/VBR/VC, but SMB (DO-214AA) package - 30 % larger footprint, lower RθJA (90 °C/W) | Better thermal performance in high-power density layouts; requires PCB pad revision | Choose SMB variant only if thermal derating headroom is insufficient with SMA's 120 °C/W RθJA |
Compared with SMA6J8.5A-M3/61, the E3 variant offers identical protection performance with standard RoHS compliance, while the SMB6J8.5A-M3/5A provides improved thermal dissipation at the cost of board area - neither is pin-compatible due to differing package outlines, requiring layout adjustment.
Availability
SMA6J8.5A-M3/61 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power interfaces, and automotive body control modules requiring stable component supply, halogen-free compliance, and MSL Level 1 manufacturability.
Supply support for SMA6J8.5A-M3/61 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, and transient protection devices with emphasis on reliability and application-specific performance.
The SMA6JxxA family is engineered for robust, surface-mount transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where repeatable clamping and thermal stability are critical.
FAQ
What is the maximum clamping voltage of the SMA6J8.5A-M3/61 under a 10/1000 µs surge?
The SMA6J8.5A-M3/61 has a maximum clamping voltage (VC) of 13.3 V when subjected to a 45.1 A peak pulse current with a 10/1000 µs waveform. This value is measured per the test conditions defined in the Vishay datasheet (Document Number: 89460), using a PCB mount with 5.0 mm × 5.0 mm copper pads per terminal. The SMA6J8.5A-M3/61 maintains this clamping performance across its specified operating temperature range.
Does the SMA6J8.5A-M3/61 support bidirectional transient suppression?
No, the SMA6J8.5A-M3/61 is a unidirectional transient voltage suppressor, designed to clamp only reverse-polarity transients. Its cathode is marked by a color band, and it must be oriented with cathode toward the protected line and anode to ground. For bidirectional protection, a separate device or a dedicated bidirectional TVS (e.g., SMA6J8.5CA) would be required - the SMA6J8.5A-M3/61 does not provide forward conduction clamping.
What is the meaning of the "M3" suffix in SMA6J8.5A-M3/61?
The "M3" suffix in SMA6J8.5A-M3/61 indicates halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance and Vishay's material categorization standards (www.vishay.com/doc?99912). It distinguishes the part from the "E3" variant, which is RoHS-compliant but contains brominated flame retardants. The SMA6J8.5A-M3/61 is certified for industrial-grade reliability and environmental compliance in regulated markets.
Can the SMA6J8.5A-M3/61 be used in a 3.3 V logic interface protection circuit?
Yes, the SMA6J8.5A-M3/61 is suitable for protecting 3.3 V logic interfaces when placed with appropriate series impedance (e.g., current-limiting resistor) to limit IPP into the device. Its 8.5 V stand-off voltage ensures minimal leakage (<20 µA) at 3.3 V, and its 13.3 V clamping voltage provides safe margin above the absolute maximum rating of most 3.3 V ICs. The SMA6J8.5A-M3/61 must be oriented correctly with cathode toward the protected line.
What is the thermal resistance (RθJA) of the SMA6J8.5A-M3/61, and how does it affect derating?
The SMA6J8.5A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on a PCB with 5.0 mm × 5.0 mm copper pads per terminal. This value directly governs power derating: at 50 °C ambient, its power dissipation drops to 4.0 W (per datasheet), and at 75 °C ambient, usable power falls to ~2.7 W. Engineers must apply this derating curve (Fig. 2 in Document 89460) when designing for elevated ambient temperatures - the SMA6J8.5A-M3/61 cannot sustain full 600 W pulse power above 25 °C without thermal consideration.
SMA6J8.5A-M3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.4V
- Voltage - Clamping (Max) @ Ipp:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 45.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J8.5A-M3/61 FAQ
1.How can I place an order for SMA6J8.5A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J8.5A-M3/61 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 SMA6J8.5A-M3/61 reliable?
The price and inventory of SMA6J8.5A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J8.5A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMA6J8.5A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J8.5A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J8.5A-M3/61?
SMA6J8.5A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J8.5A-M3/61 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 SMA6J8.5A-M3/61?
For technical support, including SMA6J8.5A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J8.5A-M3/61 requirements.
6.How does Aetrix verify that SMA6J8.5A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMA6J8.5A-M3/61 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 SMA6J8.5A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMA6J8.5A-M3/61?
All SMA6J8.5A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J8.5A-M3/61, 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 SMA6J8.5A-M3/61 part is unused and in its original packaging.
Return procedure for SMA6J8.5A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J8.5A-M3/61 Tags
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