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Vishay General Semiconductor - Diodes Division SMCJ7.0CA-E3/9AT
- Part No.:
- SMCJ7.0CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0CA-E3/9AT.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,775
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Product details
Overview
SMCJ7.0CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 7.0 V stand-off voltage (VWM), 12.0 V maximum clamping voltage (VC) at 125 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ7.0CA-E3/9AT datasheet, SMCJ7.0CA-E3/9AT pinout, SMCJ7.0CA-E3/9AT application, or SMCJ7.0CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility (via HE3 suffix variants), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 7.78–8.60 V (tested at 10 mA), ensuring consistent clamping during positive and negative transients. Its glass-passivated junction delivers fast response time (<1 ps) and low leakage (<200 µA at VWM), critical for protecting high-impedance inputs without loading circuits.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and exhibits a thermal resistance of 75 °C/W (junction-to-ambient) when mounted on recommended 8.0 mm × 8.0 mm copper pads - enabling reliable operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe steady-state bias window. |
| VBR (min/max) | 7.78 V / 8.60 V - Breakdown occurs within this range at 10 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 12.0 V - Clamped voltage at 125 A peak pulse (10/1000 µs); limits downstream voltage stress during ESD or load dump. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients like ISO 7637-2 Pulse 5a. |
| IPPM | 125 A - Maximum non-repetitive surge current (10/1000 µs); determines survivability under severe inductive switching events. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with minimal derating. |
| Package | SMC (DO-214AB) - Surface-mount package with 2.06 mm height and 7.75 mm body length; optimized for automated pick-and-place and thermal pad layout. |
Pinout & Package
SMCJ7.0CA-E3/9AT is housed in an SMC (DO-214AB) surface-mount package with two terminals: no polarity marking (bidirectional configuration). The package features matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and is rated MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional conduction path | No functional distinction between terminals; either terminal serves as anode or cathode depending on transient polarity - eliminates orientation concerns during placement. |
| Case (cathode band absent) | Non-polarized housing | Absence of cathode band confirms bidirectional construction; requires no polarity-aware PCB silkscreen or assembly verification. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables sub-nanosecond response to transients and stable long-term leakage performance (<200 µA at VWM). |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy surges such as automotive load dump (ISO 7637-2) without degradation or failure. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage overshoot across protected ICs - critical for 3.3 V and 5 V logic interfaces. |
| MSL Level 1 rating | Supports standard lead-free reflow profiles (peak 260 °C) without moisture-related popcorn failure or delamination. |
| AEC-Q101 qualification path | Base P/NHE3 variant available for automotive applications requiring qualified components (e.g., engine control, ADAS sensors). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump transients (up to 60 V, 400 ms). IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of LDO regulators to limit input voltage excursion during ISO 7637-2 Pulse 5a events. Use Value: Clamps to 12.0 V at 125 A, preventing regulator overvoltage shutdown and preserving system uptime during harsh electrical conditions. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure sensors exposed to ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF at 0 V) bidirectional shunt clamp placed at connector interface to divert fast transients before reaching precision DAC/ADC circuitry. Use Value: Sub-12 V clamping prevents latch-up in op-amps and maintains signal integrity without adding measurable capacitive loading to the loop. |
| Telecom DC Power Interface | Consumer USB Port Surge Suppression |
Use Scenario: Shielding 48 V PoE-powered switch port controllers from induced lightning surges on outdoor Ethernet cabling. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail, coordinated with secondary GDT or MOV stages to distribute energy across multiple protection tiers. Use Value: 1500 W rating absorbs initial surge energy while maintaining low clamping voltage to protect downstream DC-DC converters and PHY ICs. | Use Scenario: Adding robustness to USB-C power delivery (PD) controller VBUS lines in portable docking stations subjected to hot-plug transients and contact bounce. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp on 5–20 V VBUS line, placed adjacent to connector to minimize trace inductance and maximize suppression efficacy. Use Value: Symmetric clamping ensures protection regardless of PD negotiation direction (source/sink), and RoHS-compliant E3 finish supports consumer compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC7.0 | Lower PPPM (600 W), same VWM (7.0 V), smaller SMA package (DO-214AC) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for load dump or lightning surge. | Select SAC7.0 only for space-constrained consumer applications where 1500 W surge immunity is not required. |
| SMCJ7.0A-E3/9AT | Unidirectional version; identical VWM, VBR, VC, and PPPM but with cathode band marking and asymmetric conduction. | Requires correct polarity orientation; suitable only where transients are known to be unidirectional (e.g., DC power inputs with defined ground reference). | Choose SMCJ7.0A-E3/9AT when protecting single-polarity rails with strict layout control and no risk of reverse bias transients. |
Compared with SAC7.0 and SMCJ7.0A-E3/9AT, the SMCJ7.0CA-E3/9AT uniquely provides symmetrical 1500 W surge handling without polarity constraints - making it the preferred choice for floating or AC-coupled signal paths and automotive subsystems where transient polarity cannot be guaranteed.
Availability
SMCJ7.0CA-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom DC power conditioning, and consumer USB-C surge suppression requiring stable component supply and full RoHS compliance.
Supply support for SMCJ7.0CA-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, ruggedness, and automotive-grade qualification.
The SMCJ series was developed specifically for high-power transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where robustness against ISO 7637, IEC 61000-4-5, and lightning-induced surges is mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ7.0CA-E3/9AT?
The "CA" suffix denotes a bidirectional configuration - meaning the SMCJ7.0CA-E3/9AT provides symmetrical transient voltage suppression in both polarities, with no cathode marking and identical electrical characteristics forward and reverse. This differs from unidirectional "A" variants like SMCJ7.0A-E3/9AT, which require correct orientation and conduct only in one direction. The CA version is ideal for AC-coupled lines or systems where transient polarity is unpredictable.
Is SMCJ7.0CA-E3/9AT AEC-Q101 qualified?
The SMCJ7.0CA-E3/9AT itself is the commercial-grade RoHS-compliant variant (E3 suffix). However, Vishay offers the AEC-Q101 qualified version under the ordering code SMCJ7.0CAHE3_A/I - same electrical specs and SMC package, but with additional automotive qualification testing. For automotive applications requiring formal qualification, specify the HE3 suffix variant; the E3 version remains suitable for industrial and consumer designs meeting commercial reliability standards.
What is the maximum clamping voltage of SMCJ7.0CA-E3/9AT and at what current is it specified?
The maximum clamping voltage (VC) of SMCJ7.0CA-E3/9AT is 12.0 V, measured at the peak pulse current (IPPM) of 125 A using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range (-55 °C to +150 °C) and reflects worst-case clamping performance under high-energy surge conditions - critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the SMC (DO-214AB) package of SMCJ7.0CA-E3/9AT affect thermal performance?
The SMC (DO-214AB) package of SMCJ7.0CA-E3/9AT delivers a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This allows sustained power dissipation up to 6.5 W at +50 °C ambient and supports reliable operation at TJ = 150 °C - essential for under-hood automotive or enclosed industrial enclosures where airflow is limited.
Can SMCJ7.0CA-E3/9AT be used in place of a unidirectional TVS like SMCJ7.0A-E3/9AT?
Yes, SMCJ7.0CA-E3/9AT can replace SMCJ7.0A-E3/9AT in most applications, but with important design considerations: the CA version has no polarity marking and clamps symmetrically, eliminating orientation errors during assembly. However, its bidirectional leakage may be slightly higher than the unidirectional part at low reverse bias. If the circuit relies on DC blocking or precise reverse-bias behavior, verify leakage impact; otherwise, the CA variant offers greater flexibility and robustness against polarity-agnostic transients.
SMCJ7.0CA-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):
- 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 (SMCJ)
SMCJ7.0CA-E3/9AT FAQ
1.How can I place an order for SMCJ7.0CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0CA-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 SMCJ7.0CA-E3/9AT reliable?
The price and inventory of SMCJ7.0CA-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 SMCJ7.0CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.0CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0CA-E3/9AT?
SMCJ7.0CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0CA-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 SMCJ7.0CA-E3/9AT?
For technical support, including SMCJ7.0CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ7.0CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0CA-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 SMCJ7.0CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.0CA-E3/9AT?
All SMCJ7.0CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0CA-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 SMCJ7.0CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.0CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.0CA-E3/9AT Tags
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