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Vishay General Semiconductor - Diodes Division SMAJ6.5A-M3/61
- Part No.:
- SMAJ6.5A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5A-M3/61.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ6.5A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 11.2 V maximum clamping voltage (VC) at 35.7 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform.
For engineers reviewing the SMAJ6.5A-M3/61 datasheet, SMAJ6.5A-M3/61 pinout, SMAJ6.5A-M3/61 application, or SMAJ6.5A-M3/61 equivalent, key selection criteria include clamping performance under 35.7 A surge, thermal resistance (RθJA = 120 °C/W), unidirectional polarity marking, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device across power rails or signal lines, activating when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage behavior, while low incremental surge resistance enables rapid energy diversion during transient events.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and delivers 3.3 W steady-state power dissipation on infinite heatsink at 50 °C ambient. It is not AEC-Q101 qualified - the M3 suffix denotes halogen-free commercial grade only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 11.2 V at 35.7 A - Clamping voltage under standardized 10/1000 μs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 400 W - Peak pulse power handling capability with 10/1000 μs waveform; defines transient energy absorption limit. |
| ID @ VWM | 500 μA - Maximum reverse leakage at 6.5 V; low value minimizes standby power loss and avoids false triggering. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; critical for thermal derating above 25 °C. |
| Package | SMA (DO-214AC) - Surface-mount outline with cathode band marking; compatible with JEDEC-standard SMT assembly. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, 0.208" × 0.157" footprint, cathode indicated by band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge (e.g., ESD event polarity reversal). |
| Cathode | Reverse-biased clamping terminal | Marked end; connected to higher-potential rail (e.g., VCC); initiates avalanche clamping when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (e.g., 4 kV line-to-line) without failure. |
| 11.2 V clamping voltage at 35.7 A | Limits transient overvoltage to safe levels for 3.3 V or 5 V logic ICs, MOSFET gates, and sensor interfaces. |
| Glass passivated chip junction | Ensures long-term stability of VBR and low leakage drift across temperature and lifetime stress conditions. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and consumer electronics without compromising solderability. |
| MSL Level 1 rating (260 °C peak) | Supports single-reflow Pb-free SMT processes without moisture-induced popcorning or delamination. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins from inductive kickback during relay or solenoid switching in PLCs and HVAC controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MCU GPIO and external switch node to clamp negative transients to ground. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic inputs by limiting voltage to ≤11.2 V during 35.7 A surge events. |
Use Scenario: Input line protection for LIN bus transceivers and window lift control circuits exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO regulators to absorb short-duration spikes. Use Value: Maintains system uptime by suppressing >60 V transients down to 11.2 V clamping level, within safe operating area of downstream regulators. |
| Consumer Power Adapters | Telecom Interface Ports |
|
Use Scenario: Secondary-side overvoltage suppression on USB-C PD adapter output rails during fault conditions or hot-plug events. IC Role / Device Role / Timing Role: Fast-response clamping diode across VBUS and GND to prevent overvoltage propagation to connected devices. Use Value: Achieves <1 ns response time to limit transient duration, reducing risk of USB controller reset or port disablement. |
Use Scenario: Surge protection on RS-485 differential pairs and Ethernet PHY power rails in base station backhaul equipment. IC Role / Device Role / Timing Role: Unidirectional TVS on isolated DC-DC converter outputs feeding PHY ICs to suppress common-mode surges. Use Value: Withstands repetitive 400 W pulses without parameter shift, ensuring long-term reliability in outdoor telecom deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5A-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 gear). | Select E3 for cost-sensitive, non-halogen-restricted designs; M3 required for strict environmental compliance. |
| SMBJ6.5A-M3 | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; same VWM/VBR/VC. | Better suited for higher-energy transients; requires larger PCB footprint and different pad layout. | Choose SMBJ6.5A-M3 when surge energy exceeds 400 W limits or when design allows larger package. |
Compared with SMAJ6.5A-E3/61, the SMAJ6.5A-M3/61 adds halogen-free compliance without sacrificing clamping or thermal performance; versus SMBJ6.5A-M3, it trades peak power headroom for compact size and lower board space cost - ideal for space-constrained 3.3 V/5 V interface protection.
Availability
SMAJ6.5A-M3/61 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply, halogen-free compliance, and repeatable TVS clamping performance.
Supply support for SMAJ6.5A-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 leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series was engineered for high-volume surface-mount transient protection in cost-sensitive, space-constrained applications across industrial, computing, and communications systems - prioritizing fast response, stable clamping, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMAJ6.5A-M3/61 under a 10/1000 μs surge?
The SMAJ6.5A-M3/61 has a maximum clamping voltage (VC) of 11.2 V at 35.7 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMAJ6.5A-M3/61 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMAJ6.5A-M3/61 AEC-Q101 qualified?
No, SMAJ6.5A-M3/61 is not AEC-Q101 qualified. It carries the M3 suffix, indicating halogen-free, RoHS-compliant commercial-grade construction. For automotive-qualified versions, Vishay offers SMAJ6.5AHM3_X variants (e.g., SMAJ6.5AHM3_A/H), which include AEC-Q101 qualification and additional reliability testing. The SMAJ6.5A-M3/61 is intended for industrial, consumer, and telecom applications where automotive qualification is not required.
What does the "/61" in SMAJ6.5A-M3/61 indicate?
The "/61" suffix in SMAJ6.5A-M3/61 specifies the preferred packaging format: 7-inch diameter plastic tape and reel, with a base quantity of 1800 units per reel. This packaging supports high-speed automated pick-and-place assembly. The "61" code is part of Vishay's standardized ordering nomenclature and does not affect electrical or thermal specifications of the SMAJ6.5A-M3/61 device itself.
How does SMAJ6.5A-M3/61 differ from bidirectional SMAJ6.5CA variants?
The SMAJ6.5A-M3/61 is unidirectional, with polarity marked by a cathode band and specified for reverse-biased clamping only; it conducts forward current up to 40 A (IFSM). In contrast, SMAJ6.5CA is bidirectional, has no polarity marking, and provides symmetrical clamping in both directions - making it suitable for AC lines or differential signals. The SMAJ6.5A-M3/61 is optimized for DC rail protection where polarity is fixed and forward conduction must be controlled.
What is the thermal resistance of SMAJ6.5A-M3/61, and how does it affect layout?
The SMAJ6.5A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes. To maintain safe junction temperature under sustained power dissipation, designers must ensure adequate copper area and avoid excessive ambient temperature rise. The SMAJ6.5A-M3/61's RθJL of 30 °C/W further supports heat transfer through leads to adjacent copper.
SMAJ6.5A-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):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 35.7A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ6.5A-M3/61 FAQ
1.How can I place an order for SMAJ6.5A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5A-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 SMAJ6.5A-M3/61 reliable?
The price and inventory of SMAJ6.5A-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 SMAJ6.5A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ6.5A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5A-M3/61?
SMAJ6.5A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5A-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 SMAJ6.5A-M3/61?
For technical support, including SMAJ6.5A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5A-M3/61 requirements.
6.How does Aetrix verify that SMAJ6.5A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5A-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 SMAJ6.5A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ6.5A-M3/61?
All SMAJ6.5A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5A-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 SMAJ6.5A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ6.5A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5A-M3/61 Tags
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