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Vishay General Semiconductor - Diodes Division SMCJ8.0A-E3/9AT
- Part No.:
- SMCJ8.0A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0A-E3/9AT.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,956
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Product details
Overview
SMCJ8.0A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 dissipation (PPPM) with 10/1000 μs waveform.
For engineers reviewing the SMCJ8.0A-E3/9AT datasheet, SMCJ8.0A-E3/9AT pinout, SMCJ8.0A-E3/9AT application, or SMCJ8.0A-E3/9AT equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and DC power supply inputs where fast response (<1 ns), low clamping ratio (VC/VWM = 1.7), and AEC-Q101 qualification readiness are critical design requirements.
Technical Context
The SMCJ8.0A-E3/9AT operates as a unidirectional avalanche diode with glass-passivated junction, delivering sub-nanosecond response to transient events. Its breakdown voltage (VBR) is specified at 8.89–9.83 V with 1 mA test current, and it maintains stable clamping performance up to 150 °C junction temperature.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets MSL Level 1 per J-STD-020 and supports reflow soldering at peak temperature of 260 °C. Polarity is marked by cathode band; no marking applies to bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 8.89 V / 9.83 V at 1 mA - Ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 13.6 V at 110.3 A - Limits voltage seen by protected IC during 10/1000 μs surge |
| PPPM | 1500 W - Withstands high-energy transients without failure under standard waveform |
| ID @ VWM | 50 μA - Low leakage preserves system efficiency in standby and low-power modes |
| TJ max | +150 °C - Enables operation in under-hood automotive and industrial environments |
| RθJA | 75 °C/W - Guides thermal pad layout for safe power dissipation at elevated ambient |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction path during transient clamp |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables automated placement and fits compact PCB layouts without height constraints |
| Glass-passivated junction | Ensures long-term reliability and stable electrical parameters across temperature and humidity |
| 1500 W peak pulse power | Protects against IEC 61000-4-5 Level 4 surges (4 kV line-to-line, 2 Ω source impedance) |
| Clamping ratio VC/VWM = 1.7 | Minimizes overvoltage stress on downstream MOSFETs, regulators, and microcontrollers |
| AEC-Q101 qualification option | HE3/HM3 suffix variants support automotive-grade reliability validation for powertrain and body electronics |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive-going surges above 8.0 V. Use Value: Limits voltage to ≤13.6 V during 110 A surge, preventing damage to LDOs and CAN transceivers downstream. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients before reaching op-amp input stage. Use Value: Sub-ns response and 50 μA leakage preserve signal integrity and measurement accuracy in 24-bit ADC systems. |
| DC Power Supply Input Protection | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding AC/DC adapter outputs and PoE-powered devices against induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on +5 V or +12 V output rail, upstream of filtering capacitors. Use Value: 1500 W rating handles repeated 10/1000 μs surges without parameter drift or degradation. | Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on DC bias lines feeding transformer-coupled data interfaces. Use Value: 75 °C/W thermal resistance allows effective heat dissipation on standard FR4 with minimal copper area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A-E3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM and VC | Suitable for space-constrained consumer electronics but not for automotive-level surge immunity | Select when board area is limited and surge energy does not exceed 600 W |
| SMCJ8.0CA-E3/9AT | Bidirectional variant; identical VWM (8.0 V), symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where negative transients must also be suppressed | Choose only if bidirectional protection is mandated by circuit topology or safety standard |
Compared with SMCJ8.0A-E3/9AT, SMBJ8.0A-E3/52T offers reduced footprint at the cost of 60% lower surge handling, while SMCJ8.0CA-E3/9AT provides symmetrical clamping essential for differential or AC-biased signals-neither is pin-compatible nor drop-in; layout and polarity verification are required for either alternative.
Availability
SMCJ8.0A-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and DC power supply input protection requiring stable component supply and traceable sourcing.
Supply support for SMCJ8.0A-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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure applications where robustness and repeatable clamping performance are non-negotiable.
FAQ
What is the maximum clamping voltage of the SMCJ8.0A-E3/9AT under rated surge conditions?
The SMCJ8.0A-E3/9AT has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current of 110.3 A using the standardized 10/1000 μs waveform. This value is measured at the device terminals under specified test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMCJ8.0A-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ8.0A-E3/9AT RoHS-compliant and halogen-free?
Yes, the SMCJ8.0A-E3/9AT carries the "E3" suffix, indicating it is RoHS-compliant and manufactured to commercial-grade specifications per Vishay's material categorization. It is not halogen-free; that designation requires the "M3" suffix (e.g., SMCJ8.0A-M3/9AT). The E3 version uses matte tin-plated leads and meets JESD 201 Class 2 whisker resistance requirements.
Does the SMCJ8.0A-E3/9AT have AEC-Q101 qualification?
No, the SMCJ8.0A-E3/9AT itself is not AEC-Q101 qualified. However, Vishay offers AEC-Q101-qualified versions under the HE3 and HM3 suffixes (e.g., SMCJ8.0AHE3_A/I). These variants undergo additional stress testing and screening per AEC-Q101 Rev D and are designated for automotive applications. The SMCJ8.0A-E3/9AT remains suitable for industrial and commercial use where automotive qualification is not mandated.
What is the thermal resistance junction-to-ambient for the SMCJ8.0A-E3/9AT?
The SMCJ8.0A-E3/9AT has a typical thermal resistance junction-to-ambient (RθJA) of 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pad per terminal. This value assumes still air conditions and guides thermal design for sustained power dissipation. For higher ambient temperatures or continuous operation, derating per Figure 2 in the datasheet is required to maintain TJ ≤ 150 °C.
How does the SMCJ8.0A-E3/9AT differ from the SMCJ8.0CA-E3/9AT?
The SMCJ8.0A-E3/9AT is unidirectional, clamping only positive transients relative to ground, with polarity marked by a cathode band. The SMCJ8.0CA-E3/9AT is bidirectional, providing symmetrical clamping for both positive and negative excursions, with no polarity marking. Their VWM (8.0 V), VC (13.6 V), and PPPM (1500 W) are identical, but the CA variant is required for AC-coupled or floating signal paths where reverse-polarity surges occur.
SMCJ8.0A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ8.0A-E3/9AT FAQ
1.How can I place an order for SMCJ8.0A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0A-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 SMCJ8.0A-E3/9AT reliable?
The price and inventory of SMCJ8.0A-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 SMCJ8.0A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ8.0A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0A-E3/9AT?
SMCJ8.0A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0A-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 SMCJ8.0A-E3/9AT?
For technical support, including SMCJ8.0A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ8.0A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0A-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 SMCJ8.0A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ8.0A-E3/9AT?
All SMCJ8.0A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0A-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 SMCJ8.0A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ8.0A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.0A-E3/9AT Tags
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