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Vishay General Semiconductor - Diodes Division SMCJ8.0HE3/9AT
- Part No.:
- SMCJ8.0HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0HE3/9AT.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,201
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Product details
Overview
SMCJ8.0HE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 8.0 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 13.6 V at 110.3 A, 6.40–9.83 V breakdown range at 10 mA, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCJ8.0HE3/9AT datasheet, SMCJ8.0HE3/9AT pinout, SMCJ8.0HE3/9AT application, or SMCJ8.0HE3/9AT equivalent, this device is selected for high-energy surge immunity in automotive ECUs, industrial I/O modules, and DC power input stages where fast response (<1 ns), low clamping ratio, and RoHS-compliant AEC-Q101 reliability are required.
Technical Context
The SMCJ8.0HE3/9AT operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transients per IEEE C62.35. Its unidirectional polarity uses cathode-band marking and exhibits forward conduction only during reverse overvoltage events - no forward rectification function.
Thermal design relies on its RθJA = 75 °C/W (on 8.0 mm × 8.0 mm copper pads) and maximum junction temperature of +150 °C. It sustains non-repetitive 8.3 ms half-sine surges up to 200 A (IFSM), with derating above 25 °C per Figure 2 in the datasheet.
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 10 mA - Confirmed breakdown threshold range; ensures reliable triggering without premature conduction. |
| VC @ IPPM | 13.6 V at 110.3 A - Clamped voltage under 10/1000 µs surge; limits downstream IC stress to <14 V during 1500 W transient. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; supports ISO 7637-2 Pulse 1/2/5a compliance testing. |
| ID @ VWM | 50 µA - Reverse leakage at 8.0 V; negligible power loss and noise contribution in standby operation. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by molded band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop when transient exceeds VWM. |
| Cathode (banded end) | High-side connection point | Connected to protected line (e.g., 12 V rail); avalanche conduction initiates here during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced degradation in harsh environments. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive switch-off), improving clamping fidelity. |
| J-STD-002/JESD 22-B102 compliant terminations | Guarantees reliable solder wetting and mechanical bond strength on PCBs across production volumes. |
| JESD 201 Class 2 whisker resistance (HE3 suffix) | Prevents tin whisker growth under thermal cycling, critical for long-life automotive and industrial deployments. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting 12 V supply inputs of BCM microcontrollers against load-dump and jump-start transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused battery feed and LDO input. Use Value: Limits voltage to ≤13.6 V during 1500 W pulses, preventing latch-up or damage to 16 V-rated regulators and MCU IOs. |
Use Scenario: Safeguarding 24 V digital input channels from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary front-end protection before optocoupler or Schmitt-trigger input stage. Use Value: Sub-1 ns response clamps transients before propagation into isolation barrier, preserving signal integrity and timing margins. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Drive Board |
Use Scenario: Guarding AC/DC adapter output against lightning-induced surges entering via PoE or shared power bus. IC Role / Device Role / Timing Role: Secondary-side TVS on +12 V or +5 V distribution net before DC-DC converters. Use Value: 1500 W rating absorbs multiple 10/1000 µs surges without degradation, supporting EN 61000-4-5 Level 3 compliance. |
Use Scenario: Shielding MCU GPIOs and gate drivers from commutation spikes generated by brushed DC motors. IC Role / Device Role / Timing Role: Localized TVS on motor driver enable/control lines adjacent to MOSFETs. Use Value: 8.0 V VWM aligns with 5 V logic levels; 13.6 V VC prevents false triggering while blocking >10 V spikes. |
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/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR/VC specs. | Suitable for space-constrained, lower-energy circuits (e.g., sensor interfaces), not for 12 V automotive power rails. | Select when board area is limited and surge energy does not exceed 400 W. |
| SMCJ8.0AHE3/9AT | Same package and electrical specs, but unidirectional variant without AEC-Q101 qualification. | Lacks automotive qualification; acceptable for industrial/commercial use where AEC-Q101 is not mandated. | Choose for cost-sensitive non-automotive designs requiring identical clamping performance. |
Compared with SMCJ8.0HE3/9AT, SMAJ8.0AHE3/A offers reduced surge capacity in a smaller footprint, while SMCJ8.0AHE3/9AT provides identical protection without automotive qualification - making the HE3 suffix critical for vehicular deployment where reliability validation is mandatory.
Availability
SMCJ8.0HE3/9AT is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controllers, and telecom power supply front-ends requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ8.0HE3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and 1500 W surge handling are essential.
FAQ
What is the clamping voltage of the SMCJ8.0HE3/9AT under maximum surge current?
The SMCJ8.0HE3/9AT clamps to 13.6 V at its rated peak pulse current of 110.3 A (10/1000 µs waveform). This value is measured and guaranteed per the Vishay datasheet (Document Number: 88394), ensuring predictable overvoltage limiting for downstream circuitry during standardized surge events.
Is the SMCJ8.0HE3/9AT suitable for automotive applications?
Yes - the SMCJ8.0HE3/9AT carries AEC-Q101 qualification (explicitly noted in the datasheet's Mechanical Data section), confirming its suitability for automotive environments including under-hood and chassis-mounted electronics subject to extended temperature cycling, vibration, and humidity exposure.
What does the "HE3" suffix indicate in SMCJ8.0HE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this grade from commercial "E3" variants and confirms enhanced reliability for automotive and industrial deployments where long-term interconnect integrity is critical.
How does the SMCJ8.0HE3/9AT differ from the bi-directional SMCJ8.0CA variant?
The SMCJ8.0HE3/9AT is unidirectional with cathode marking and conducts only in reverse breakdown; the SMCJ8.0CA is bi-directional, symmetrically clamps both polarities, and has no polarity marking. Their VWM (8.0 V), PPPM (1500 W), and VC (13.6 V) are identical, but circuit topology determines selection.
What PCB pad layout is recommended for optimal thermal performance of the SMCJ8.0HE3/9AT?
Vishay specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve the rated 1500 W PPPM and thermal resistance (RθJA = 75 °C/W). Deviating from this layout reduces surge capability and risks thermal runaway during repeated transients.
SMCJ8.0HE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 100A
- 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)
SMCJ8.0HE3/9AT FAQ
1.How can I place an order for SMCJ8.0HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0HE3/9AT 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 SMCJ8.0HE3/9AT reliable?
The price and inventory of SMCJ8.0HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.0HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ8.0HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0HE3/9AT?
SMCJ8.0HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0HE3/9AT 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 SMCJ8.0HE3/9AT?
For technical support, including SMCJ8.0HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0HE3/9AT requirements.
6.How does Aetrix verify that SMCJ8.0HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0HE3/9AT 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 SMCJ8.0HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ8.0HE3/9AT?
All SMCJ8.0HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0HE3/9AT, 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 SMCJ8.0HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ8.0HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.0HE3/9AT Tags
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