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Vishay General Semiconductor - Diodes Division SMCJ6.5CAHE3/9AT
- Part No.:
- SMCJ6.5CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ6.5CAHE3/9AT.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,054
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Product details
Overview
SMCJ6.5CAHE3/9AT from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) in SMC (DO-214AB) package, with 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and 133.9 A peak pulse current (IPPM) under 10/1000 μs waveform-designed to protect automotive-grade signal lines and power rails against ESD and inductive switching transients.
For engineers reviewing the SMCJ6.5CAHE3/9AT datasheet, SMCJ6.5CAHE3/9AT pinout, SMCJ6.5CAHE3/9AT application, or SMCJ6.5CAHE3/9AT equivalent, this device delivers AEC-Q101 qualification, low clamping voltage (VC = 11.2 V at IPPM), MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin plating-key selection criteria for automotive sensor interfaces, industrial I/O protection, and high-reliability DC power inputs.
Technical Context
The SMCJ6.5CAHE3/9AT operates as a bidirectional avalanche diode, clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and fast response (<1 ns), while its low incremental surge resistance enables effective energy diversion during 10/1000 μs surges.
Thermally, it features RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The device meets UL 497B recognition (QVGQ2) and is rated for 1500 W peak pulse power when mounted on 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin for protected circuitry. |
| VBR min/max | 7.22 V / 7.98 V at IT = 10 mA - Confirmed breakdown range ensuring reliable turn-on across production lot and temperature. |
| VC @ IPPM | 11.2 V at 133.9 A - Clamping voltage under full-rated 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak transient power handling capability; validates robustness against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| TJ max | +150 °C - Maximum junction temperature rating; supports under-hood automotive deployment and high-ambient industrial environments. |
| MSL Level | Level 1 per J-STD-020 - Enables standard reflow assembly without dry-pack or baking requirements. |
| AEC-Q101 | Qualified - Certified for automotive electronic systems per stress test requirements including HTGB, HTRB, and TCT. |
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); cathode band absent per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as current sink during positive transients and source during negative transients; symmetrical conduction enables dual-polarity protection without external orientation constraints. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA devices; terminals are interchangeable-no functional distinction in layout or routing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or floating signal lines (e.g., CAN bus, RS-485) without requiring polarity-aware PCB placement. |
| AEC-Q101 qualification | Validated for automotive powertrain, body electronics, and ADAS modules where long-term reliability under thermal cycling and humidity is mandatory. |
| 1500 W peak pulse rating | Withstands repetitive ISO 7637-2 Load Dump surges up to 133.9 A without degradation-critical for 12 V battery rail protection. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to protected ICs; e.g., clamps 11.2 V at failure threshold while VBR starts at 7.22 V. |
| UL 497B recognition (QVGQ2) | Meets safety agency requirements for telecom and industrial equipment requiring certified surge protection components. |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Port |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) sensors exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp ±100 V transients. Use Value: Prevents ADC saturation and latch-up by limiting voltage to ≤11.2 V during 133.9 A surges-preserving measurement integrity and system uptime. | Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at connector entry point to shunt fast transients before reaching optocoupler isolation stage. Use Value: Eliminates false triggering and input-stage damage by clamping 10/1000 μs surges within 1 ns-maintaining deterministic state detection. |
| DC Power Input Protection | RS-485 Transceiver Line |
Use Scenario: Safeguarding 12 V DC input of telematics control units (TCUs) against battery disconnection spikes and jump-start overvoltages. IC Role / Device Role / Timing Role: Primary TVS on main power rail, coordinated with upstream fuse and downstream LDO to absorb >1000 W transient energy. Use Value: Ensures uninterrupted operation during ISO 7637-2 Pulse 5a (75 V/300 ms) events-reducing field failure rates in fleet deployments. | Use Scenario: Protecting differential data lines of RS-485 transceivers in factory automation networks from ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS pair (one per line) referenced to common-mode ground, suppressing common- and differential-mode transients. Use Value: Maintains signal integrity up to 10 Mbps by limiting line-to-line voltage excursion to <22.4 V-preventing receiver saturation and bit errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5CA-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 ISO 7637-2 load dump | Select when board space is constrained and surge threat level is limited to human-body-model ESD. |
| SMCJ6.5CAHM3/9AT | Halogen-free variant; identical electrical specs, same AEC-Q101 qualification, same SMC package | No functional difference; used where halogen-free compliance is mandated by OEM or regional environmental regulations | Choose for automotive Tier 1 supply chains requiring halogen-free materials without sacrificing performance or qualification. |
Compared with SMCJ6.5CAHE3/9AT, SMAJ6.5CA-E3/61T offers reduced surge capacity in a smaller footprint, while SMCJ6.5CAHM3/9AT provides identical protection with halogen-free construction-enabling direct substitution where material compliance drives sourcing decisions.
Availability
SMCJ6.5CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and DC power rail surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ6.5CAHE3/9AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, industry-qualified components.
The SMCJ series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure-engineered for AEC-Q101 compliance, UL recognition, and robust surge handling in harsh environments.
FAQ
What is the clamping voltage of SMCJ6.5CAHE3/9AT at its rated peak pulse current?
The SMCJ6.5CAHE3/9AT has a maximum clamping voltage (VC) of 11.2 V when subjected to its rated peak pulse current (IPPM) of 133.9 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and verified across production lots. The low VC ensures downstream ICs such as microcontrollers or transceivers remain within absolute maximum ratings during surge events. SMCJ6.5CAHE3/9AT maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMCJ6.5CAHE3/9AT qualified for automotive applications?
Yes, SMCJ6.5CAHE3/9AT is AEC-Q101 qualified, meaning it has passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling (TCT), and unbiased highly accelerated stress testing (UHAST). This qualification confirms suitability for automotive powertrain, body control, and ADAS modules. The HE3 suffix explicitly denotes AEC-Q101 compliance, and the device is listed in Vishay's automotive-grade product portfolio. SMCJ6.5CAHE3/9AT is commonly deployed in engine control units and battery management systems.
What does the "CA" suffix indicate in SMCJ6.5CAHE3/9AT?
The "CA" suffix in SMCJ6.5CAHE3/9AT designates a bidirectional transient voltage suppressor-capable of clamping voltage transients of either polarity symmetrically. Unlike unidirectional variants (e.g., SMCJ6.5A), the CA version has no cathode marking and exhibits matched VBR and VC characteristics in both directions. This makes SMCJ6.5CAHE3/9AT ideal for protecting AC-coupled signals, differential buses like CAN or RS-485, and floating power domains where polarity cannot be assumed. Electrical characteristics apply identically in forward and reverse bias.
What is the thermal resistance from junction to ambient for SMCJ6.5CAHE3/9AT?
The typical thermal resistance from junction to ambient (RθJA) for SMCJ6.5CAHE3/9AT is 75 °C/W, measured under standard conditions using minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). This value assumes no heatsink and natural convection cooling. For higher-power or elevated-temperature operation, derating per Figure 2 in the datasheet is required. The lower RθJL of 15 °C/W indicates efficient heat transfer to PCB leads, supporting reliable operation in compact layouts. SMCJ6.5CAHE3/9AT remains within safe limits up to +150 °C junction temperature.
How does SMCJ6.5CAHE3/9AT differ from SMCJ6.5AHE3/9AT?
SMCJ6.5CAHE3/9AT is bidirectional, while SMCJ6.5AHE3/9AT is unidirectional-with a marked cathode band and asymmetric conduction. The CA version clamps equally in both polarities (VBR = 7.22–7.98 V in either direction), whereas the A version conducts only in reverse bias and blocks forward current. Key differences include absence of polarity marking on SMCJ6.5CAHE3/9AT, doubled ID limit for VWM ≤10 V (per datasheet note 3), and suitability for AC or floating circuits. SMCJ6.5CAHE3/9AT is preferred for CAN, LIN, and RS-485 protection; SMCJ6.5AHE3/9AT suits DC power rail or single-polarity signal lines.
SMCJ6.5CAHE3/9AT 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:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ6.5CAHE3/9AT FAQ
1.How can I place an order for SMCJ6.5CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ6.5CAHE3/9AT 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 SMCJ6.5CAHE3/9AT reliable?
The price and inventory of SMCJ6.5CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ6.5CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ6.5CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ6.5CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ6.5CAHE3/9AT?
SMCJ6.5CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ6.5CAHE3/9AT 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 SMCJ6.5CAHE3/9AT?
For technical support, including SMCJ6.5CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ6.5CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ6.5CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ6.5CAHE3/9AT 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 SMCJ6.5CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ6.5CAHE3/9AT?
All SMCJ6.5CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ6.5CAHE3/9AT, 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 SMCJ6.5CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ6.5CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ6.5CAHE3/9AT Tags
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