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Vishay General Semiconductor - Diodes Division SMCJ8.0AHE3/9AT
- Part No.:
- SMCJ8.0AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0AHE3/9AT.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,532
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Product details
Overview
SMCJ8.0AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 10 mA, 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 - deployed in automotive ECUs, industrial sensor interfaces, and DC-DC converter input stages.
For engineers reviewing the SMCJ8.0AHE3/9AT datasheet, SMCJ8.0AHE3/9AT pinout, SMCJ8.0AHE3/9AT application, or SMCJ8.0AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (via HE3 suffix), 1500 W surge capability, low 13.6 V clamping at rated IPPM, and compatibility with automated SMT assembly on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ8.0AHE3/9AT operates as a silicon avalanche diode that enters controlled breakdown above its VBR threshold to shunt transient energy away from protected circuitry. Its glass-passivated junction ensures stable leakage (<50 μA at VWM) and repeatable clamping performance across temperature (-55 °C to +150 °C).
It delivers fast response time (<1.0 ps), low incremental surge resistance, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is qualified to AEC-Q101, confirming suitability for automotive under-hood and infotainment applications requiring high reliability under repetitive surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V systems. |
| VBR (min/max) | 8.89 V / 9.83 V at IT = 10 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 13.6 V at 110.3 A - Clamping voltage limits downstream IC stress during 1500 W surge events (10/1000 μs). |
| PPPM | 1500 W - Peak pulse power rating determines survivability against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| ID @ VWM | ≤50 μA - Low reverse leakage preserves efficiency in battery-powered or low-quiescent-current circuits. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for high-power density layout. |
Pinout & Package
SMCJ8.0AHE3/9AT uses the SMC (DO-214AB) package: a 2-terminal surface-mount case with cathode band marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point for unidirectional TVS configuration | Connected to protected line (e.g., 12 V rail); clamps positive transients to ground when voltage exceeds VBR. |
| Anode | Reference/ground return path | Connected to system ground or low-impedance return plane; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails per stress test requirements. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure in harsh environments. |
| 1500 W peak pulse power | Withstands high-energy transients such as load dump (ISO 7637-2 Pulse 5a) without degradation or failure. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping, reducing risk of damage to downstream MOSFETs, MCUs, or CAN transceivers. |
| MSL Level 1 moisture sensitivity | Enables standard reflow assembly without baking; compatible with high-volume SMT lines using 260 °C peak profile. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs of engine control units (ECUs) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp positive transients above 13.6 V. Use Value: Prevents latch-up or destruction of upstream PMICs and microcontrollers during ISO 7637-2 Pulse 5a events up to 1500 W. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to absorb ESD and inductive switching noise from nearby solenoids. Use Value: Maintains signal integrity by limiting transient-induced offset errors and preventing ADC saturation or op-amp damage. |
| DC-DC Converter Input Protection | Telecom Power Supply Surge Suppression |
Use Scenario: Safeguarding input stage of isolated 48 V-to-12 V DC-DC converters in telecom base stations. IC Role / Device Role / Timing Role: Primary surge suppression element located before input filter capacitor and controller IC. Use Value: Absorbs IEC 61000-4-5 Line-Earth surges (4 kV/2 Ω) without derating or thermal runaway, preserving converter uptime. |
Use Scenario: Front-end protection of PoE-powered network switches exposed to lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Unidirectional TVS on DC bias feed line (e.g., 57 V PSE output) to clamp common-mode transients. Use Value: Limits voltage excursion to <13.6 V during 10/1000 μs surges, enabling reliable operation of IEEE 802.3af/at PD controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0AHE3/9AT | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR/VC specs. | Suitable only for lower-energy transients (e.g., ESD-only, not load dump); limited thermal mass reduces surge endurance. | Select when board space is constrained and surge threat level is ≤400 W (e.g., consumer IoT, non-automotive sensors). |
| SMCJ8.0CAHE3/9AT | Bidirectional variant; identical VWM (8.0 V), symmetric VBR (±8.89–9.83 V), same PPPM (1500 W) and VC (13.6 V). | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN bus) where negative transients must also be clamped. | Choose for differential or floating interfaces needing symmetrical clamping; not interchangeable with SMCJ8.0AHE3/9AT due to polarity mismatch. |
Compared with SMAJ8.0AHE3/9AT and SMCJ8.0CAHE3/9AT, the SMCJ8.0AHE3/9AT uniquely balances automotive-grade reliability, 1500 W surge capacity, and unidirectional polarity in the SMC package - making it optimal for high-energy DC rail protection where space permits and polarity is fixed.
Availability
SMCJ8.0AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supplies requiring stable component supply, AEC-Q101 compliance, and high-surge-capability TVS protection.
Supply support for SMCJ8.0AHE3/9AT 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, power handling, and automotive qualification.
The SMCJ series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where robustness against ISO 7637-2 and IEC 61000-4-5 surges is critical.
FAQ
What is the clamping voltage of SMCJ8.0AHE3/9AT at its rated peak pulse current?
The SMCJ8.0AHE3/9AT has a maximum clamping voltage (VC) of 13.6 V at its rated peak pulse current (IPPM) of 110.3 A, measured with a 10/1000 μs waveform. This value is confirmed in the Vishay datasheet (Document Number: 88394, Table on page 2). The clamping voltage directly determines the maximum stress imposed on downstream components during surge events, making it a critical parameter for circuit protection design using the SMCJ8.0AHE3/9AT.
Is SMCJ8.0AHE3/9AT qualified for automotive applications?
Yes, the SMCJ8.0AHE3/9AT is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This qualification confirms successful completion of stress tests including high-temperature operating life, temperature cycling, and surge robustness required for automotive under-hood and cabin electronics. The SMCJ8.0AHE3/9AT is explicitly listed in Vishay's AEC-Q101 qualified product table, validating its use in ECUs, body control modules, and ADAS sensor power rails.
What does the "9AT" suffix mean in SMCJ8.0AHE3/9AT?
The "9AT" suffix denotes the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3500 pieces per reel. This format supports high-volume automated SMT placement. The "HE3" portion indicates RoHS-compliant construction with AEC-Q101 qualification, while "SMCJ8.0A" specifies the electrical family (8.0 V stand-off, unidirectional, 1500 W rating). The full part number SMCJ8.0AHE3/9AT thus identifies a fully qualified, production-ready TVS diode in industry-standard packaging.
How does SMCJ8.0AHE3/9AT differ from SMCJ8.0CAHE3/9AT?
The SMCJ8.0AHE3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where only positive transients occur. In contrast, SMCJ8.0CAHE3/9AT is bidirectional - lacking polarity marking and capable of clamping both positive and negative surges symmetrically. Their VWM, VBR, VC, and PPPM ratings are identical, but they are not functionally interchangeable: using the unidirectional SMCJ8.0AHE3/9AT in a bidirectional application (e.g., RS-485) would leave negative transients unprotected.
What is the thermal resistance of SMCJ8.0AHE3/9AT, and how does it affect PCB layout?
The SMCJ8.0AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended pad layout, and 15 °C/W junction-to-lead (RθJL). For reliable operation at full 1500 W surge rating, Vishay specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Reducing pad size increases thermal impedance, risking junction overheating during repetitive surges - so PCB layout must follow the SMCJ8.0AHE3/9AT-recommended copper area to maintain specified performance.
SMCJ8.0AHE3/9AT 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ8.0AHE3/9AT FAQ
1.How can I place an order for SMCJ8.0AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0AHE3/9AT 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 SMCJ8.0AHE3/9AT reliable?
The price and inventory of SMCJ8.0AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.0AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ8.0AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0AHE3/9AT?
SMCJ8.0AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0AHE3/9AT 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 SMCJ8.0AHE3/9AT?
For technical support, including SMCJ8.0AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ8.0AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0AHE3/9AT 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 SMCJ8.0AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ8.0AHE3/9AT?
All SMCJ8.0AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0AHE3/9AT, 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 SMCJ8.0AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ8.0AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.0AHE3/9AT Tags
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