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Vishay General Semiconductor - Diodes Division SMCJ11HE3/9AT
- Part No.:
- SMCJ11HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11HE3/9AT.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,161
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Product details
Overview
SMCJ11HE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 11 V standoff voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V clamping voltage (VC) at 82.4 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMCJ11HE3/9AT datasheet, SMCJ11HE3/9AT pinout, SMCJ11HE3/9AT application, or SMCJ11HE3/9AT equivalent, this AEC-Q101 qualified, RoHS-compliant TVS diode supports automotive-grade surge protection in power supply rails, I/O lines, and sensor interfaces where fast response (<1 ps), low clamping ratio, and high surge current handling are critical.
Technical Context
The SMCJ11HE3/9AT operates as a silicon avalanche diode, leveraging a glass-passivated junction to achieve sub-nanosecond response to transients. Its unidirectional polarity enables integration into DC-biased circuits without reverse conduction during normal operation, while maintaining full clamping capability under positive-going surges.
Rated for -55 °C to +150 °C junction temperature, it delivers 6.5 W steady-state power dissipation on infinite heatsink at 50 °C ambient and exhibits 75 °C/W junction-to-ambient thermal resistance. The device meets MSL Level 1 per J-STD-020 and passes JESD 201 Class 2 whisker testing due to its matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - Ensures reliable turn-on within tight tolerance for predictable protection threshold |
| VC @ IPPM | 18.2 V at 82.4 A - Limits voltage seen by protected ICs during 1500 W transient events |
| PPPM | 1500 W - Withstands high-energy surges such as ISO 7637-2 Pulse 1/2a/5a in automotive systems |
| IFSM | 200 A - Handles 8.3 ms half-sine surge without failure, supporting load-dump immunity |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures |
| Package | DO-214AB (SMCJ) - Surface-mount footprint compatible with automated placement and reflow soldering |
Pinout & Package
DO-214AB (SMCJ) package: molded plastic case with J-bend leads, 0.320" (8.13 mm) body length, 0.246" (6.22 mm) width, cathode band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in DC-biased protection path | Connected to ground or low-potential node; conducts during positive transients |
| Cathode | High-side connection to protected line | Marked with band; ties to power rail or signal line requiring clamping to VWM |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensors |
| Glass-passivated junction | Ensures stable VBR and long-term reliability under thermal cycling and humidity stress |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking preconditioning |
| 1500 W peak pulse power | Provides margin against repetitive ESD and lightning-induced surges per IEC 61000-4-5 |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., >1 kV/µs) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and downstream DC/DC converter input. Use Value: Clamps surge voltage to ≤18.2 V, preventing damage to 24 V tolerant regulators and preserving system uptime. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted across sensor output line and ground to absorb field-wiring induced spikes. Use Value: Maintains signal integrity below 18.2 V clamping level, avoiding ADC saturation and false fault reporting. |
| Consumer Device USB Port Protection | Telecom Line Card Surge Suppression |
Use Scenario: Adding secondary overvoltage protection on VBUS line of USB 2.0 host ports in set-top boxes. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to ground, positioned upstream of USB switch IC. Use Value: Responds in <1 ns to ESD events (IEC 61000-4-2 ±15 kV contact), limiting VBUS excursion to safe levels. | Use Scenario: Front-end protection of Ethernet PHY power supplies in DSLAM line cards exposed to lightning surges. IC Role / Device Role / Timing Role: TVS placed on +3.3 V or +5 V bias rail feeding PHY ICs. Use Value: Absorbs up to 1500 W energy from IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs), preventing latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (19.0 V at 21.6 A) | Suitable for lower-energy transients; limited to consumer-grade non-automotive use | Select when board space is constrained and surge requirements are ≤400 W |
| SMCJ11AHE3/9AT | Same electrical specs and AEC-Q101 qualification; differs only in marking code (no 'H' suffix in part number) | No functional difference; identical performance and qualification status | Acceptable interchange if marking compliance is not required per OEM specification |
Compared with SMCJ11HE3/9AT, SMAJ11A-E3/61T offers reduced surge capacity in a smaller footprint, while SMCJ11AHE3/9AT is electrically and qualitatively identical-making it a direct form-fit-function alternative where documentation permits.
Availability
SMCJ11HE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply, AEC-Q101 compliance, and high-reliability transient suppression.
Supply support for SMCJ11HE3/9AT 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 and automotive qualification.
The SMCJ series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power transient suppression in harsh environments including automotive, industrial, and telecom applications.
FAQ
What is the clamping voltage of the SMCJ11HE3/9AT under maximum rated surge current?
The SMCJ11HE3/9AT has a maximum clamping voltage (VC) of 18.2 V at 82.4 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value ensures protected circuitry remains below critical voltage thresholds during standardized surge events, and is measured under defined test conditions per ANSI/IEEE C62.35.
Is the SMCJ11HE3/9AT qualified for automotive applications?
Yes, the SMCJ11HE3/9AT is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS subsystems. The 'HE3' suffix explicitly denotes AEC-Q101 qualification and RoHS compliance, validated through stress testing per the AEC standard.
What does the '9AT' in SMCJ11HE3/9AT indicate?
The '9AT' suffix specifies the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This format supports high-volume automated assembly and is distinct from the '57T' variant (7-inch reel, 850 units), both sharing identical electrical and mechanical specifications.
How does the SMCJ11HE3/9AT differ from bi-directional SMCJ11CA variants?
The SMCJ11HE3/9AT is unidirectional, meaning it clamps only positive transients relative to ground and blocks reverse current like a standard diode. In contrast, SMCJ11CA is bidirectional and clamps transients of either polarity-making it suitable for AC-coupled or floating signal lines where polarity is undefined.
What thermal resistance values apply to the SMCJ11HE3/9AT in PCB design?
The SMCJ11HE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, measured on 0.31" × 0.31" copper pads. These values guide thermal pad sizing and layout for sustained power dissipation up to 6.5 W at 50 °C ambient.
SMCJ11HE3/9AT 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 74.6A
- 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)
SMCJ11HE3/9AT FAQ
1.How can I place an order for SMCJ11HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11HE3/9AT 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 SMCJ11HE3/9AT reliable?
The price and inventory of SMCJ11HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ11HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11HE3/9AT?
SMCJ11HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11HE3/9AT 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 SMCJ11HE3/9AT?
For technical support, including SMCJ11HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11HE3/9AT requirements.
6.How does Aetrix verify that SMCJ11HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ11HE3/9AT 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 SMCJ11HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ11HE3/9AT?
All SMCJ11HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11HE3/9AT, 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 SMCJ11HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ11HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ11HE3/9AT Tags
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