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Vishay General Semiconductor - Diodes Division SMCJ6.5AHE3/9AT
- Part No.:
- SMCJ6.5AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ6.5AHE3/9AT.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,507
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Product details
Overview
SMCJ6.5AHE3/9AT from Vishay General Semiconductor is a unidirectional 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, 11.2 V maximum clamping voltage (VC) at 133.9 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the SMCJ6.5AHE3/9AT datasheet, SMCJ6.5AHE3/9AT pinout, SMCJ6.5AHE3/9AT application, or SMCJ6.5AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability, low 11.2 V clamping under 133.9 A surge, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ6.5AHE3/9AT operates as a silicon avalanche diode that enters controlled breakdown when reverse voltage exceeds its VBR threshold, diverting transient energy to ground while clamping the protected line to ≤11.2 V. Its glass-passivated junction ensures stable leakage (<500 µA at VWM) and fast response time (<1 ns), critical for suppressing ESD and inductive switching spikes.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and meets J-STD-020 MSL Level 1 with 260 °C reflow peak, supporting high-volume automotive-grade manufacturing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before leakage exceeds 500 µA; defines safe DC rail margin. |
| VBR @ IT = 10 mA | 7.22–7.98 V - Breakdown onset range; ensures predictable turn-on during transients without false triggering. |
| VC @ IPPM = 133.9 A | 11.2 V - Clamped voltage during 1500 W surge; limits downstream IC stress below logic-level thresholds. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 µs waveform; supports high-energy lightning/surge immunity per IEC 61000-4-5. |
| IFSM | 200 A - Single half-sine surge rating (8.3 ms); protects against motor commutation or relay bounce events. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive reliability including HTOL, TC, UHAST, and ESD testing per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band on one end; anode and cathode terminals defined per unidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VREV > VBR. |
| Anode | Reference / ground return | Typically tied to system ground plane; completes low-inductance path for surge current dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control, ADAS sensors, and body modules. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift across temperature and lifetime. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation. |
| MSL Level 1 (260 °C) | Enables single-pass lead-free reflow without moisture-related popcorning or delamination. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V ICs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in vehicle body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND, clamping surges within nanoseconds to prevent MCU brownout or latch-up. Use Value: With 11.2 V clamping at 133.9 A, SMCJ6.5AHE3/9AT holds rail voltage below 12 V regulator dropout threshold during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature transmitters in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge events. Use Value: Sub-1 ns response and <500 µA leakage at 6.5 V ensure signal integrity remains uncompromised during normal operation and transient suppression. |
| DC-DC Converter Input Protection | USB Power Delivery Line Protection |
|
Use Scenario: Shielding buck converter input stage from inductive kickback caused by upstream relay or switch-mode power supply coupling. IC Role / Device Role / Timing Role: Placed directly at converter VIN pin, absorbing repetitive 1500 W pulses without thermal runaway due to RθJL = 15 °C/W. Use Value: 200 A IFSM rating handles worst-case 8.3 ms inductive surges, while 150 °C TJ max supports enclosed enclosure designs. |
Use Scenario: Protecting USB Type-C VBUS line in portable medical devices against accidental 12 V adapter misconnection or hot-swap transients. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and GND, selected for 6.5 V VWM to avoid interfering with 5 V nominal operation. Use Value: Tight VBR range (7.22–7.98 V) ensures early conduction before USB PD controller damage threshold (~15 V), with no false triggering during 5.5 V tolerance excursions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5AHE3/9AT | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR specs. | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy ESD and local switching noise. | Select when board space is constrained and surge energy is ≤400 W; verify thermal derating for ambient >70 °C. |
| SMCJ6.5CAHE3/9AT | Bidirectional variant; identical VWM, VBR, VC, and PPPM but symmetrical clamping in both polarities. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus); not usable on DC rails with defined polarity. | Choose only if protecting bidirectional signals; unidirectional SMCJ6.5AHE3/9AT offers better cost and layout simplicity for DC power rails. |
Compared with SMAJ6.5AHE3/9AT, SMCJ6.5AHE3/9AT delivers 3.75× higher surge power in a slightly larger footprint, making it preferred for automotive and industrial mains-connected systems; versus SMCJ6.5CAHE3/9AT, it avoids unnecessary bidirectional complexity and cost where polarity is fixed.
Availability
SMCJ6.5AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and DC-DC converter input hardening requiring stable component supply, full AEC-Q101 traceability, and 13" tape-and-reel delivery for SMT production.
Supply support for SMCJ6.5AHE3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience is mission-critical.
FAQ
What is the clamping voltage of the SMCJ6.5AHE3/9AT under maximum surge conditions?
The SMCJ6.5AHE3/9AT has a maximum clamping voltage (VC) of 11.2 V at 133.9 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the actual voltage seen by protected circuitry during worst-case surge events - critical for ensuring downstream 5 V or 3.3 V ICs remain within absolute maximum ratings. The SMCJ6.5AHE3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ6.5AHE3/9AT qualified for automotive applications?
Yes, the SMCJ6.5AHE3/9AT carries AEC-Q101 qualification, verified through stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and human-body-model ESD (≥8 kV). Its HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction. The SMCJ6.5AHE3/9AT is widely used in automotive body control modules, infotainment power supplies, and ADAS sensor front-ends where reliability under vibration, thermal cycling, and electrical transients is mandatory.
How does the SMCJ6.5AHE3/9AT differ from the bidirectional SMCJ6.5CAHE3/9AT?
The SMCJ6.5AHE3/9AT is unidirectional with cathode marking and conducts only in reverse bias above VBR, while the SMCJ6.5CAHE3/9AT is bidirectional - symmetric in both polarities with no polarity marking. Both share identical VWM (6.5 V), VBR, VC, and PPPM (1500 W), but the SMCJ6.5AHE3/9AT is optimized for DC power rail protection where polarity is fixed. Using the unidirectional SMCJ6.5AHE3/9AT avoids unnecessary cost and layout overhead in such applications.
What is the thermal resistance and maximum junction temperature of the SMCJ6.5AHE3/9AT?
The SMCJ6.5AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads. Its maximum operating junction temperature is +150 °C, enabling deployment in under-hood automotive locations and enclosed industrial enclosures. Derating curves in the datasheet (Fig. 2) confirm sustained 1500 W surge capability down to TA = +85 °C with proper PCB copper area - a key specification for the SMCJ6.5AHE3/9AT in thermally demanding designs.
Does the SMCJ6.5AHE3/9AT meet lead-free reflow requirements?
Yes, the SMCJ6.5AHE3/9AT meets J-STD-020 Moisture Sensitivity Level (MSL) 1 with a maximum peak reflow temperature of 260 °C, fully compatible with lead-free SAC305 solder profiles. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and the device passes JESD 201 Class 2 whisker testing. The HE3 suffix confirms RoHS compliance and suitability for automated SMT assembly - essential for high-yield production of the SMCJ6.5AHE3/9AT in automotive and industrial manufacturing lines.
SMCJ6.5AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ6.5AHE3/9AT FAQ
1.How can I place an order for SMCJ6.5AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ6.5AHE3/9AT 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 SMCJ6.5AHE3/9AT reliable?
The price and inventory of SMCJ6.5AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ6.5AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ6.5AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ6.5AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ6.5AHE3/9AT?
SMCJ6.5AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ6.5AHE3/9AT 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 SMCJ6.5AHE3/9AT?
For technical support, including SMCJ6.5AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ6.5AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ6.5AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ6.5AHE3/9AT 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 SMCJ6.5AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ6.5AHE3/9AT?
All SMCJ6.5AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ6.5AHE3/9AT, 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 SMCJ6.5AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ6.5AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ6.5AHE3/9AT Tags
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