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Vishay General Semiconductor - Diodes Division SMCJ6.5A-M3/9AT
- Part No.:
- SMCJ6.5A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ6.5A-M3/9AT.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,151
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Product details
Overview
SMCJ6.5A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 1500 W peak pulse power (10/1000 µs), 133.9 A peak pulse current (IPPM), and clamps to ≤11.2 V under surge. It is widely deployed in automotive power supply inputs and industrial sensor interface circuits.
For engineers reviewing the SMCJ6.5A-M3/9AT datasheet, SMCJ6.5A-M3/9AT pinout, SMCJ6.5A-M3/9AT application, or SMCJ6.5A-M3/9AT equivalent, this page delivers verified electrical specs, thermal behavior, polarity marking, RoHS/halogen-free compliance status, and real-world design context for ESD and load-switching transient suppression.
Technical Context
This TVS operates as a clamping device: under normal bias it presents high impedance (>1 MΩ leakage at 6.5 V), but triggers into low-impedance conduction when reverse voltage exceeds VBR, limiting transient energy via controlled avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance (typical <0.1 Ω).
Thermally, it uses a DO-214AB package with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. The cathode band marking identifies polarity, and its M3 suffix confirms halogen-free, RoHS-compliant construction per JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 6.5 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 7.22–7.98 V at 10 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | ≤11.2 V at IPPM = 133.9 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream IC survivability. |
| PPPM (Peak Pulse Power) | 1500 W - Surge energy-handling capacity under standardized waveform; supports IEC 61000-4-5 Level 4 immunity. |
| ID (Reverse Leakage) | ≤500 µA at VWM - Low quiescent current preserves battery life and avoids false triggering in low-power systems. |
| TJ max. | 150 °C - Maximum junction temperature; enables use in under-hood automotive and industrial environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement for rated power dissipation. |
Pinout & Package
SMCJ6.5A-M3/9AT uses the SMC (DO-214AB) package: a rectangular, surface-mount case with two coplanar leads. Polarity is marked by a cathode band on the body; the banded end is the cathode (K), and the opposite end is the anode (A). No internal terminals beyond these two.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection point for unidirectional clamping | Connected to protected line (e.g., +12 V rail); conducts surge current toward ground when voltage exceeds VBR. |
| Anode (non-banded end) | Low-side reference terminal | Typically tied to system ground or return path; completes clamping loop during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial OEMs without compromising surge performance. |
| MSL Level 1 (J-STD-020) | Enables standard reflow soldering without moisture sensitivity concerns-no baking required prior to assembly. |
| Very fast response time (<1 ps) | Clamps transients before sensitive downstream components (e.g., microcontrollers, CAN transceivers) experience overstress. |
| Low incremental surge resistance | Minimizes voltage overshoot during high-di/dt events, improving clamping precision and reducing stress on protected ICs. |
| AEC-Q101 qualified variants available | While SMCJ6.5A-M3/9AT is commercial-grade, HE3/HM3 variants support automotive qualification-enabling direct BOM scaling. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load-dump spikes (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between input rail and chassis ground. Use Value: Limits peak voltage to ≤11.2 V during 133.9 A surges, preventing damage to LDOs and MCU power domains. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) from ESD and inductive kickback in factory automation sensors. IC Role / Device Role / Timing Role: Standoff-mode TVS connected across signal and return lines, referenced to local ground. Use Value: Sub-11.2 V clamping preserves ADC input integrity and avoids latch-up in op-amp front-ends during 8 kV contact ESD. |
| Telecom DC Power Feeds | Consumer USB Power Port Protection |
|
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary-level TVS on input stage, upstream of DC/DC converter. Use Value: Withstands 1500 W pulses while maintaining ≤6.5 V standby leakage-critical for low-quiescent-power standby modes. |
Use Scenario: Adding secondary-level surge protection on 5 V USB VBUS lines in portable chargers and docking stations. IC Role / Device Role / Timing Role: Unidirectional clamp between VBUS and GND, sized for consumer-grade surge standards (IEC 61000-4-5). Use Value: Fast clamping (<1 ps) prevents USB PHY damage during hot-plug transients and meets UL 497B protector classification. |
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-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD), not load-dump or lightning-induced surges | Select when board space is constrained and surge threat level is limited to human-body-model ESD. |
| SMCJ6.5AHE3_A/I | Identical electrical specs; AEC-Q101 qualified, HE3 suffix (RoHS, non-halogen-free), 13" tape format | Required for automotive production programs needing PPAP documentation and qualification traceability | Choose for Tier-1 automotive designs where AEC-Q101 compliance and full lifecycle support are mandatory. |
Compared with SMAJ6.5A-E3/61T, SMCJ6.5A-M3/9AT delivers 3.75× higher surge power handling and superior thermal performance; versus SMCJ6.5AHE3_A/I, it trades automotive qualification for cost-effective commercial-grade supply in high-volume industrial applications.
Availability
SMCJ6.5A-M3/9AT is available at Aetrix Electronics and suitable for automotive power inputs, industrial sensor interfaces, telecom DC feeds, and consumer USB port protection requiring stable component supply across multi-year production cycles.
Supply support for SMCJ6.5A-M3/9AT 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, efficiency, and application-specific optimization.
The SMCJ series was engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom infrastructure where 1500 W surge capability and thermal stability are critical.
FAQ
What is the maximum clamping voltage of the SMCJ6.5A-M3/9AT under a 10/1000 µs surge?
The SMCJ6.5A-M3/9AT clamps to a maximum of 11.2 V when subjected to its rated peak pulse current of 133.9 A (10/1000 µs waveform). This value is measured at the device terminals under standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads), and defines the upper voltage limit imposed on protected circuitry during surge events. Designers use this VC value to verify downstream ICs remain within absolute maximum ratings.
Does the SMCJ6.5A-M3/9AT have automotive qualification?
No, the SMCJ6.5A-M3/9AT is a commercial-grade part with halogen-free, RoHS-compliant construction (M3 suffix) but no AEC-Q101 qualification. For automotive applications requiring formal qualification, Vishay offers the SMCJ6.5AHE3_A/I or SMCJ6.5AHM3_A/I variants-identical electrically but certified to AEC-Q101 and supplied with full PPAP documentation. The SMCJ6.5A-M3/9AT remains suitable for non-safety-critical industrial and consumer systems.
How is polarity identified on the SMCJ6.5A-M3/9AT package?
Polarity on the SMCJ6.5A-M3/9AT is indicated by a visible cathode band printed on the body of the SMC (DO-214AB) package. The banded end is the cathode (K), and the opposite end is the anode (A). This marking is essential for correct orientation during PCB layout-reversal would prevent proper clamping function in unidirectional configurations. No additional markings or codes denote polarity beyond this single band.
What is the thermal resistance from junction to ambient for the SMCJ6.5A-M3/9AT?
The SMCJ6.5A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout: 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is critical for calculating maximum allowable power dissipation at elevated ambient temperatures. Derating curves in the datasheet (Fig. 2) must be applied for operation above TA = 25 °C.
Can the SMCJ6.5A-M3/9AT be used in bidirectional protection circuits?
No-the SMCJ6.5A-M3/9AT is a unidirectional TVS diode, intended for DC rail protection where polarity is fixed. Bidirectional operation requires the CA-suffixed variant (e.g., SMCJ6.5CA), which lacks polarity marking and clamps symmetrically in both directions. Using the unidirectional SMCJ6.5A-M3/9AT in AC or floating signal paths risks forward conduction and failure; always match device type (A vs. CA) to circuit topology and voltage polarity constraints.
SMCJ6.5A-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 133.9A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ6.5A-M3/9AT FAQ
1.How can I place an order for SMCJ6.5A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ6.5A-M3/9AT 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 SMCJ6.5A-M3/9AT reliable?
The price and inventory of SMCJ6.5A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ6.5A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ6.5A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ6.5A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ6.5A-M3/9AT?
SMCJ6.5A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ6.5A-M3/9AT 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 SMCJ6.5A-M3/9AT?
For technical support, including SMCJ6.5A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ6.5A-M3/9AT requirements.
6.How does Aetrix verify that SMCJ6.5A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ6.5A-M3/9AT 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 SMCJ6.5A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ6.5A-M3/9AT?
All SMCJ6.5A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ6.5A-M3/9AT, 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 SMCJ6.5A-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ6.5A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ6.5A-M3/9AT Tags
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