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Vishay General Semiconductor - Diodes Division SMCJ7.0CA-M3/9AT
- Part No.:
- SMCJ7.0CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0CA-M3/9AT.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,584
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Product details
Overview
SMCJ7.0CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust ESD and surge protection on signal/power lines. It features 7.0 V standoff voltage (VWM), 12.0 V clamping voltage (VC) at 125 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - ideal for safeguarding automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMCJ7.0CA-M3/9AT datasheet, SMCJ7.0CA-M3/9AT pinout, SMCJ7.0CA-M3/9AT application, or SMCJ7.0CA-M3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance (0.096 Ω typical), AEC-Q101 qualification eligibility via HM3 suffix, and halogen-free RoHS compliance per JESD201 Class 2 whisker testing.
Technical Context
The SMCJ7.0CA-M3/9AT operates as a voltage-clamped shunt protector: under transient overvoltage exceeding its 7.78–8.60 V breakdown range (VBR at 10 mA), it rapidly switches to low-impedance conduction, limiting downstream voltage to ≤12.0 V. Its bidirectional architecture ensures identical clamping behavior in both polarities - critical for AC-coupled or floating signal lines.
Thermally, it delivers 6.5 W steady-state power dissipation at TA = 50 °C with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to +150 °C junction temperature. The glass-passivated junction and matte tin-plated leads ensure stable performance across automotive thermal cycles and automated solder reflow profiles (MSL Level 1, 260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 7.0 V - Maximum continuous reverse voltage before clamping begins; sets operating margin for protected circuitry |
| VBR (Breakdown) | 7.78–8.60 V at 10 mA - Confirmed bidirectional breakdown window defining turn-on threshold |
| VC (Clamping) | 12.0 V at 125 A (10/1000 μs) - Peak voltage seen by protected IC during worst-case surge; enables 3.3 V/5 V logic survival |
| PPPM | 1500 W - Surge energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV) compliance with proper PCB layout |
| TJ max. | +150 °C - Enables deployment in under-hood automotive environments and high-temperature industrial enclosures |
| Package | SMC (DO-214AB) - Standardized 8.13 mm × 6.22 mm footprint with 2.62 mm height; compatible with automated pick-and-place |
| RoHS Status | Halogen-free, RoHS-compliant (M3 suffix) - Meets IPC-J-STD-609A Class 1 and JEDEC JESD201 Class 2 whisker requirements |
Pinout & Package
SMCJ7.0CA-M3/9AT uses the SMC (DO-214AB) surface-mount package: symmetrical dual-leaded case with no polarity marking (bidirectional device). Leads are matte tin-plated, solderable per J-STD-002 and JESD22-B102, mounted on 8.0 mm × 8.0 mm copper pads per terminal for optimal thermal and surge current handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (positive half-cycle) | Conducts surge current into ground when voltage exceeds VBR in positive direction |
| Cathode | Transient current sink (negative half-cycle) | Conducts surge current into ground when voltage exceeds VBR in negative direction; functionally identical to Anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR, VC, and leakage specs in both directions - eliminates need for polarity-aware placement on differential or AC lines |
| Low clamping ratio (VC/VWM) | 1.71 - Minimizes overvoltage stress on downstream 5 V or 3.3 V ICs during transients |
| Fast response time | <1 ps - Clamps before most microsecond-scale surges can damage CMOS inputs or analog front-ends |
| High surge current capability | 125 A peak (10/1000 μs) - Withstands repeated ISO 7637-2 Pulse 1/2/5a events without degradation |
| Automated assembly compatibility | MSL Level 1 rating (260 °C peak) and matte tin plating - Supports lead-free reflow without dewetting or voiding |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and LIN nodes from load dump and inductive switching transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed directly at connector entry point to divert surge energy before reaching PHY layer. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V system, 13.5 V nominal) while surviving >1000 surges per AEC-Q101 test cycle. | Use Scenario: Safeguarding 24 V digital input modules against field-wiring faults and relay coil flyback in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact inputs, coordinated with series current-limiting resistor and optocoupler isolation. Use Value: Limits transient voltage to ≤12.0 V, ensuring safe operation of 5 V microcontroller GPIOs even during 1 kV/μs fast-rising surges. |
| Consumer USB Port Protection | Telecom Line Interface Protection |
Use Scenario: Adding secondary surge immunity to USB 2.0 data lines (D+/D−) in set-top boxes exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to connector to suppress ESD (IEC 61000-4-2 ±15 kV) and EFT (IEC 61000-4-4 ±2 kV). Use Value: Junction capacitance <100 pF (typ.) avoids signal integrity loss at 480 Mbps, while 1500 W rating handles multi-pulse surge stress. | Use Scenario: Protecting Ethernet PHY magnetics and PoE injectors from induced surges on outdoor telecom drop cables. IC Role / Device Role / Timing Role: Common-mode clamp across transformer center taps and differential pair terminations to suppress longitudinal surges. Use Value: Symmetrical bidirectional clamping prevents DC bias shift on transformer windings, preserving common-mode rejection and PoE negotiation stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0CA-E3/57T | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VC | Suitable for space-constrained consumer boards but derates faster above 25 °C ambient | Select when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2 |
| SMCJ7.0A-M3/9AT | Unidirectional version; cathode band marking; identical VWM, VC, PPPM, and package | Requires polarity-aware layout; used where DC bias exists and reverse conduction must be blocked | Choose only if circuit topology mandates unidirectional clamping (e.g., DC power rail with defined ground reference) |
Compared with SMAJ7.0CA-E3/57T and SMCJ7.0A-M3/9AT, the SMCJ7.0CA-M3/9AT uniquely balances 1500 W surge capacity, bidirectional symmetry, and thermal robustness in the industry-standard SMC footprint - making it optimal for automotive and industrial applications demanding repeatable high-energy transient immunity.
Availability
SMCJ7.0CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port hardening, and telecom line interface protection requiring stable component supply across extended production lifecycles.
Supply support for SMCJ7.0CA-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, automotive qualification, and high-volume manufacturability.
The SMCJ series was engineered specifically for high-power transient suppression in harsh environments - targeting AEC-Q101-compliant automotive systems, industrial controls, and infrastructure equipment where failure tolerance and long-term parametric stability are mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ7.0CA-M3/9AT?
The "CA" suffix denotes a bidirectional configuration: the SMCJ7.0CA-M3/9AT provides symmetrical transient voltage suppression in both polarities, with identical breakdown (7.78–8.60 V), clamping (12.0 V), and leakage characteristics regardless of voltage polarity. This eliminates polarity marking on the SMCJ7.0CA-M3/9AT package and simplifies layout for AC-coupled or floating signal paths.
Is SMCJ7.0CA-M3/9AT qualified to AEC-Q101?
The base SMCJ7.0CA-M3/9AT is halogen-free and RoHS-compliant but not AEC-Q101 qualified. For automotive-grade qualification, Vishay offers the HM3 variant (e.g., SMCJ7.0CAHM3_A/I), which adds AEC-Q101 stress testing and traceability. The SMCJ7.0CA-M3/9AT itself meets all electrical and mechanical specs required for AEC-Q101 - only the qualification documentation differs.
What is the maximum clamping voltage of SMCJ7.0CA-M3/9AT under surge conditions?
The SMCJ7.0CA-M3/9AT has a maximum clamping voltage (VC) of 12.0 V when subjected to a 10/1000 μs waveform at 125 A peak pulse current. This value is guaranteed across the full operating temperature range (−55 °C to +150 °C) and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
How does the SMCJ7.0CA-M3/9AT differ from the unidirectional SMCJ7.0A-M3/9AT?
The SMCJ7.0CA-M3/9AT is bidirectional with no polarity marking and identical electrical behavior in both directions, whereas the SMCJ7.0A-M3/9AT is unidirectional with a cathode band and conducts only in reverse bias. Both share identical VWM (7.0 V), VC (12.0 V), PPPM (1500 W), and SMC package - but the SMCJ7.0CA-M3/9AT enables simpler layout on differential or AC lines where polarity is undefined.
What PCB layout practices maximize surge performance of SMCJ7.0CA-M3/9AT?
To maximize surge performance, mount the SMCJ7.0CA-M3/9AT with minimum trace length between the protected line and ground, using 8.0 mm × 8.0 mm copper pads per terminal as specified in the Vishay datasheet. Avoid vias in the current path; use multiple thermal vias under the pad if internal layers serve as ground planes. Keep the SMCJ7.0CA-M3/9AT within 2 mm of the connector entry point to minimize inductance-induced overshoot.
SMCJ7.0CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 125A
- 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)
SMCJ7.0CA-M3/9AT FAQ
1.How can I place an order for SMCJ7.0CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0CA-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 SMCJ7.0CA-M3/9AT reliable?
The price and inventory of SMCJ7.0CA-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 SMCJ7.0CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.0CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0CA-M3/9AT?
SMCJ7.0CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0CA-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 SMCJ7.0CA-M3/9AT?
For technical support, including SMCJ7.0CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0CA-M3/9AT requirements.
6.How does Aetrix verify that SMCJ7.0CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0CA-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 SMCJ7.0CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.0CA-M3/9AT?
All SMCJ7.0CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0CA-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 SMCJ7.0CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.0CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.0CA-M3/9AT Tags
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