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Vishay General Semiconductor - Diodes Division SMCJ8.0CA-E3/9AT
- Part No.:
- SMCJ8.0CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0CA-E3/9AT.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ8.0CA-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 8.0 V stand-off voltage (VWM), 13.6 V maximum clamping voltage (VC) at 110.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMCJ8.0CA-E3/9AT datasheet, SMCJ8.0CA-E3/9AT pinout, SMCJ8.0CA-E3/9AT application, or SMCJ8.0CA-E3/9AT equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.7), AEC-Q101 qualification eligibility (via HE3/HM3 variants), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ8.0CA-E3/9AT operates as a silicon avalanche diode with symmetrical bidirectional breakdown behavior, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable clamping performance across -55 °C to +150 °C operating range.
It delivers fast response time (<1.0 ps) to transient events and maintains low incremental surge resistance due to optimized chip geometry and low-inductance SMC package. Thermal resistance is characterized at RθJA = 75 °C/W (free air) and RθJL = 15 °C/W (junction-to-lead), supporting reliable operation under repetitive surge conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 8.0 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 8.89–9.83 V at 1.0 mA - Confirmed bidirectional avalanche onset range; ensures consistent triggering across polarity. |
| VC (Clamping Voltage) | 13.6 V at IPPM = 110.3 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity for standardized transient waveforms; enables robust protection against IEC 61000-4-5 surges. |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - Minimal standby current draw; critical for low-power sensor and battery-backed circuits. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
SMCJ8.0CA-E3/9AT uses the SMC (DO-214AB) package: a two-terminal, symmetrical surface-mount device with no polarity marking (bidirectional). Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; either terminal serves as anode or cathode depending on instantaneous voltage polarity. |
| Case (body) | Non-electrical mechanical interface | Thermally conductive plastic body with UL 94 V-0 flammability rating; provides mechanical anchoring and heat path to PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity constraints. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) surges when properly laid out on 8.0 mm × 8.0 mm copper pads. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage stress on protected ICs - e.g., keeps 3.3 V or 5 V logic inputs within safe absolute maximum ratings during transients. |
| AEC-Q101 qualification path | Base P/NHE3 variant is AEC-Q101 qualified; E3 suffix indicates RoHS-compliant commercial grade with MSL Level 1 and 260 °C lead-free reflow capability. |
| Fast response time (<1 ps) | Responds ahead of most semiconductor switching events, preventing latch-up or gate oxide damage in MOSFETs and microcontrollers. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector or IC input pins to shunt surge energy before it reaches sensitive analog front-ends or communication PHYs. Use Value: Prevents permanent damage to 5 V or 3.3 V sensor signal conditioning circuits while maintaining signal integrity during normal operation due to <1.0 μA leakage at 8.0 V. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to 24 V DC field wiring transients from relay coil de-energization or ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS deployed across input terminals to clamp induced spikes up to ±1 kV without affecting steady-state 24 V logic detection thresholds. Use Value: Enables reliable operation in harsh factory environments where repeated surges would otherwise degrade optocoupler lifetime or cause false triggering in Schmitt-trigger inputs. |
| Telecom Line Interface Protection | Consumer Power Adapter Surge Suppression |
Use Scenario: Shielding Ethernet PHY magnetics and PoE interface circuitry from lightning-induced surges on outdoor cabling in network switches and IP cameras. IC Role / Device Role / Timing Role: Primary-level bidirectional suppressor placed upstream of common-mode chokes and isolation transformers to absorb bulk surge energy before differential-mode filtering. Use Value: Maintains signal fidelity at 100 Mbps+ data rates due to low junction capacitance (~1000 pF typical at 0 V), while surviving repeated 10/1000 μs transients up to 1500 W. |
Use Scenario: Adding secondary-side transient suppression on 5 V/9 V/12 V USB-C and barrel-jack power inputs of smart home hubs and audio devices. IC Role / Device Role / Timing Role: Final-stage clamping device after primary AC-DC conversion and DC-DC regulation, protecting LDOs and USB controllers from conducted surges entering via power cables. Use Value: Eliminates need for additional series impedance or RC snubbers - achieves full 1500 W surge handling with only two terminals and no biasing, reducing BOM count and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC8.0CA | Same VWM (8.0 V) and VC (13.6 V), but lower PPPM (1000 W); smaller SMA package (DO-214AC). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4; preferred where board space is constrained and surge risk is moderate. | Select SAC8.0CA only if 1000 W rating suffices and SMC footprint is unavailable. |
| SMCJ8.0A-E3/9AT | Unidirectional version; identical VWM, VC, and PPPM, but includes cathode band marking and forward conduction path. | Required only for DC-biased lines where reverse polarity must be blocked (e.g., positive rail protection with ground reference). | Choose SMCJ8.0A-E3/9AT exclusively for unidirectional applications; SMCJ8.0CA-E3/9AT is mandatory for AC or floating signal protection. |
Compared with SAC8.0CA, the SMCJ8.0CA-E3/9AT offers 50% higher surge power handling and superior thermal dissipation via larger SMC package; compared with SMCJ8.0A-E3/9AT, it eliminates polarity dependency - simplifying layout and enabling universal use on differential or AC-coupled nodes.
Availability
SMCJ8.0CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter designs requiring stable component supply, RoHS compliance, and long-term production continuity.
Supply support for SMCJ8.0CA-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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and AEC-Q qualification.
The SMCJ series was developed specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure - balancing clamping performance, surge robustness, and manufacturability in standard SMT packages.
FAQ
What is the clamping voltage of SMCJ8.0CA-E3/9AT at its rated peak pulse current?
The SMCJ8.0CA-E3/9AT has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current (IPPM) of 110.3 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 standards and confirmed in Vishay's datasheet revision 09-Jan-2024. The clamping voltage defines the upper voltage limit imposed on protected circuitry during surge events, making it critical for ensuring downstream ICs remain within absolute maximum ratings. SMCJ8.0CA-E3/9AT maintains this performance bidirectionally.
Is SMCJ8.0CA-E3/9AT suitable for automotive applications?
Yes - the SMCJ8.0CA-E3/9AT is RoHS-compliant and manufactured to Vishay's commercial-grade specifications, with an AEC-Q101-qualified variant available under the HE3 suffix (e.g., SMCJ8.0CAHE3_A/I). While the E3/9AT suffix itself denotes commercial grade, its -55 °C to +150 °C operating junction temperature range, glass-passivated junction, and robust 1500 W surge rating align with under-hood and chassis-mounted automotive subsystem requirements. Designers targeting AEC-Q101 compliance must specify the HE3 or HM3 variant, not the E3/9AT.
How does the bidirectional design of SMCJ8.0CA-E3/9AT affect PCB layout?
The bidirectional nature of SMCJ8.0CA-E3/9AT eliminates polarity marking - there is no cathode band or orientation requirement during placement. This simplifies PCB layout by removing orientation checks in automated assembly and enabling symmetric placement across differential pairs or AC-coupled lines. Layout must still follow Vishay's recommended 8.0 mm × 8.0 mm copper pad per terminal to achieve rated PPPM and thermal performance. No silkscreen polarity indicator is needed, reducing mask complexity and potential assembly errors. SMCJ8.0CA-E3/9AT thus lowers design overhead versus unidirectional alternatives like SMCJ8.0A-E3/9AT.
What is the reverse leakage current specification for SMCJ8.0CA-E3/9AT at its stand-off voltage?
The SMCJ8.0CA-E3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 μA at its stand-off voltage (VWM) of 8.0 V, measured at TA = 25 °C. This ultra-low leakage ensures minimal power loss and signal distortion in high-impedance sensor interfaces or battery-powered circuits. The value is guaranteed across the full operating temperature range per datasheet characterization and reflects the stability of its glass-passivated silicon junction. For precision analog applications, this leakage level avoids measurable offset or drift - a key advantage over higher-leakage TVS alternatives. SMCJ8.0CA-E3/9AT maintains this spec bidirectionally.
Can SMCJ8.0CA-E3/9AT be used in place of a unidirectional TVS like SMCJ8.0A-E3/9AT?
SMCJ8.0CA-E3/9AT can replace SMCJ8.0A-E3/9AT only in applications where reverse conduction is acceptable - such as AC signal lines, differential buses (RS-485, CAN), or floating power domains. It must not be substituted in DC-biased unidirectional paths (e.g., +12 V rail to ground) where forward conduction could create short-circuit faults. The clamping performance (VC = 13.6 V) and surge rating (1500 W) are identical, but polarity behavior differs fundamentally. Always verify circuit topology before substitution; SMCJ8.0CA-E3/9AT is not a drop-in replacement for unidirectional use cases. Refer to the exact function required in your schematic before selecting SMCJ8.0CA-E3/9AT.
SMCJ8.0CA-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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 110.3A
- 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)
SMCJ8.0CA-E3/9AT FAQ
1.How can I place an order for SMCJ8.0CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0CA-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 SMCJ8.0CA-E3/9AT reliable?
The price and inventory of SMCJ8.0CA-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 SMCJ8.0CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ8.0CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0CA-E3/9AT?
SMCJ8.0CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0CA-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 SMCJ8.0CA-E3/9AT?
For technical support, including SMCJ8.0CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ8.0CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0CA-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 SMCJ8.0CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ8.0CA-E3/9AT?
All SMCJ8.0CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0CA-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 SMCJ8.0CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ8.0CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.0CA-E3/9AT Tags
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