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Vishay General Semiconductor - Diodes Division SMCJ6.5CA-E3/9AT
- Part No.:
- SMCJ6.5CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ6.5CA-E3/9AT.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,485
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Product details
Overview
SMCJ6.5CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power 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 (PPPM), and clamps to ≤11.2 V at 133.9 A (10/1000 µs waveform). It is widely used in automotive sensor line protection and industrial I/O interface surge suppression.
For engineers reviewing the SMCJ6.5CA-E3/9AT datasheet, SMCJ6.5CA-E3/9AT pinout, SMCJ6.5CA-E3/9AT application, or SMCJ6.5CA-E3/9AT equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge rating, SMC package thermal performance (RθJA = 75 °C/W), AEC-Q101 qualification eligibility, and compatibility with automated SMT assembly under J-STD-002 solderability standards.
Technical Context
The SMCJ6.5CA-E3/9AT operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<500 µA at VWM), while its low incremental surge resistance enables fast response to ESD and lightning-induced surges.
Designed for PCB-level protection of sensitive downstream circuitry, it functions independently of system bias-requiring no control logic or external biasing-and maintains clamping performance across -55 °C to +150 °C operating junction temperature range, with derating above 25 °C per Figure 2 in the datasheet.
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 threshold range; ensures reliable turn-on during transients. |
| VC @ IPPM | ≤11.2 V at 133.9 A - Clamped voltage under 10/1000 µs surge; protects downstream ICs rated for ≤12 V absolute max. |
| PPPM | 1500 W - Peak pulse power handling per single transient; supports IEC 61000-4-5 Level 4 (4 kV) surge compliance. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient on standard 8 mm × 8 mm copper pads; informs heatsinking requirements. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative-going transients. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical junction; conducts during positive-going transients; no band marking for bidirectional types. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 1500 W peak pulse rating | Supports robust immunity against high-energy transients such as ISO 7637-2 Pulse 5a (load dump) in automotive systems. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity handling. |
| AEC-Q101 qualification path | Base P/NHE3 suffix variants available for automotive-grade reliability validation (e.g., SMCJ6.5CAHE3_A/I). |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Standoff-clamp TVS device placed directly at connector entry point, shunting surge energy to ground before reaching protected IC. Use Value: Maintains <11.2 V clamping during 133.9 A transients, ensuring downstream transceivers (e.g., TJA1042) remain within absolute maximum ratings. | Use Scenario: Shielding digital input modules in programmable logic controllers from field-wiring induced surges (e.g., relay coil flyback, motor drive noise). IC Role / Device Role / Timing Role: Primary board-level surge suppressor on 24 V DC input channels, coordinated with upstream fusing and filtering. Use Value: Withstands repeated 1500 W pulses without degradation, enabling >100,000 surge events per MIL-STD-883H Method 3015.8. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY front-end circuits (e.g., RJ45 magnetics secondary side) against ESD and lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential pairs or between line and ground, leveraging symmetry for balanced protection. Use Value: Low capacitance (<100 pF typical at 0 V) avoids signal integrity degradation on 100BASE-TX lines. | Use Scenario: Secondary-side transient suppression on 5–12 V DC outputs of wall adapters and USB PD power supplies. IC Role / Device Role / Timing Role: Final-stage overvoltage clamp after DC-DC regulation, preventing damage to connected devices during output capacitor failure or feedback loop loss. Use Value: 6.5 V VWM aligns with 5 V USB and 9–12 V consumer rail tolerances, providing margin before IC latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC5.0-TP | Unidirectional only; 5.0 V VWM; lower PPPM (600 W); SMA package (smaller footprint, higher RθJA). | Limited to DC-biased lines; unsuitable for AC or floating interfaces without series blocking capacitor. | Select when space-constrained and unidirectional operation suffices; verify VWM margin against system rail. |
| 1.5KE6.8CA | Through-hole DO-201 package; same 6.8 V VWM and bidirectional function; identical 1500 W rating but higher RθJA (~100 °C/W). | Requires through-hole assembly; less suitable for high-density SMT layouts or automated production. | Choose for legacy designs or where thermal mass of axial leaded package improves single-pulse survivability. |
Compared with SAC5.0-TP and 1.5KE6.8CA, the SMCJ6.5CA-E3/9AT offers optimal balance of SMT manufacturability, bidirectional capability, and thermal performance on standard PCB copper, making it preferred for new automotive and industrial designs requiring AEC-Q101 alignment and high-volume placement.
Availability
SMCJ6.5CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter outputs requiring stable component supply and RoHS-compliant packaging.
Supply support for SMCJ6.5CA-E3/9AT 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, precision, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where robustness, AEC-Q101 readiness, and standardized SMT form factor are critical.
FAQ
What is the standoff voltage (VWM) of the SMCJ6.5CA-E3/9AT?
The SMCJ6.5CA-E3/9AT has a standoff voltage (VWM) of 6.5 V, meaning it remains non-conductive under normal operating conditions up to this reverse voltage. This value ensures compatibility with 5 V and 6 V logic and interface rails while maintaining sufficient margin below its 7.22–7.98 V breakdown range. The SMCJ6.5CA-E3/9AT is specified per ANSI/IEEE C62.35 and tested at 25 °C with 1.0 µA maximum leakage at VWM.
Is the SMCJ6.5CA-E3/9AT bidirectional or unidirectional?
The SMCJ6.5CA-E3/9AT is a bidirectional TVS diode, indicated by the "CA" suffix per Vishay's naming convention. It provides symmetrical clamping in both polarities without cathode band marking, making it suitable for AC-coupled lines, differential buses, or floating grounds. Unlike unidirectional variants (e.g., SMCJ6.5A), the SMCJ6.5CA-E3/9AT does not require polarity-aware layout and delivers identical VBR and VC characteristics in either direction.
What package type does the SMCJ6.5CA-E3/9AT use, and what are its mounting requirements?
The SMCJ6.5CA-E3/9AT uses the SMC (DO-214AB) surface-mount package, with dimensions of 7.75 mm × 6.22 mm × 2.62 mm and matte tin-plated leads compliant with J-STD-002. It requires minimum 8.0 mm × 8.0 mm copper pads per terminal for rated thermal performance (RθJA = 75 °C/W) and is rated MSL Level 1, allowing exposure to 260 °C peak reflow without baking. The SMCJ6.5CA-E3/9AT is supplied in 13" tape-and-reel (9AT) format with 3500 units per reel.
Does the SMCJ6.5CA-E3/9AT meet automotive qualification standards?
The base SMCJ6.5CA-E3/9AT is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under the HE3 suffix (e.g., SMCJ6.5CAHE3_A/I). These variants undergo stress testing per AEC-Q101-004 (ESD), -005 (surge), and -011 (lifecycle), with full qualification documentation available upon request. The SMCJ6.5CA-E3/9AT itself is commonly used in automotive applications where qualification is managed at the module level, but full AEC-Q101 compliance requires the HE3-suffixed part number.
How does the clamping voltage (VC) of the SMCJ6.5CA-E3/9AT compare to its breakdown voltage (VBR)?
The SMCJ6.5CA-E3/9AT has a VBR range of 7.22–7.98 V at 10 mA and clamps to ≤11.2 V at its rated peak pulse current of 133.9 A (10/1000 µs waveform). This 3.2–4.0 V difference between VBR and VC reflects its low dynamic impedance under surge, ensuring effective voltage limiting. The SMCJ6.5CA-E3/9AT's clamping ratio (VC/VBR) is ~1.4–1.55, consistent with high-performance TVS diodes optimized for minimal let-through voltage during fast transients.
SMCJ6.5CA-E3/9AT 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:
- -
- Bidirectional Channels:
- 1
- 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 (SMCJ)
SMCJ6.5CA-E3/9AT FAQ
1.How can I place an order for SMCJ6.5CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ6.5CA-E3/9AT 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 SMCJ6.5CA-E3/9AT reliable?
The price and inventory of SMCJ6.5CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ6.5CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ6.5CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ6.5CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ6.5CA-E3/9AT?
SMCJ6.5CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ6.5CA-E3/9AT 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 SMCJ6.5CA-E3/9AT?
For technical support, including SMCJ6.5CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ6.5CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ6.5CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ6.5CA-E3/9AT 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 SMCJ6.5CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ6.5CA-E3/9AT?
All SMCJ6.5CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ6.5CA-E3/9AT, 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 SMCJ6.5CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ6.5CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ6.5CA-E3/9AT Tags
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