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Vishay General Semiconductor - Diodes Division SMCJ7.0HE3/9AT
- Part No.:
- SMCJ7.0HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0HE3/9AT.pdf
- Description:
- TVS DIODE 7VWM 13.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,591
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Product details
Overview
SMCJ7.0HE3/9AT from Vishay General Semiconductor is a uni-directional 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 7.0 V stand-off voltage (VWM), 12.0 V maximum clamping voltage at 125 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform. Used in automotive ECUs, industrial sensor interfaces, and power supply input stages to absorb inductive switching transients.
For engineers reviewing the SMCJ7.0HE3/9AT datasheet, SMCJ7.0HE3/9AT pinout, SMCJ7.0HE3/9AT application, or SMCJ7.0HE3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, RoHS and whisker-test compliance (JESD 201 Class 2), and direct alternative part comparisons - all confirmed from Vishay's official SMCJ series documentation (Doc. #88394, Rev. 11-Dec-12).
Technical Context
The SMCJ7.0HE3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response to ESD and surge events. Its breakdown voltage is specified at 7.78–8.60 V (min/max) with 10 mA test current, and it maintains low incremental surge resistance to ensure stable clamping under repetitive 1500 W pulses.
Designed for surface-mount use on 8.0 mm × 8.0 mm copper pads, it achieves 75 °C/W junction-to-ambient thermal resistance and supports operating junction temperatures from –55 °C to +150 °C. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - critical for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse working voltage before clamping begins; sets safe operating margin above nominal 5–6 V rail voltages. |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA - Ensures reliable avalanche initiation without premature conduction during normal operation. |
| VC @ IPPM | 12.0 V at 125 A - Clamping voltage limits protected circuit stress during worst-case 10/1000 µs surges (e.g., ISO 7637-2 Pulse 1/2a). |
| PPPM | 1500 W - Peak pulse power handling capacity defines survivability against high-energy transients like load dump or inductive kick. |
| ID @ VWM | 200 µA max - Low leakage preserves efficiency in battery-powered or low-quiescent systems where standby current matters. |
| TJ max. | +150 °C - Enables deployment in engine control modules, motor drives, and other high-temperature environments without derating. |
| RθJA | 75 °C/W - Thermal resistance value used to calculate junction temperature rise under sustained power dissipation (e.g., 6.5 W PD). |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band; cathode is the banded end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge or bias conditions. |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 7 V rail); initiates clamping when reverse voltage exceeds VBR, shunting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock - required for ECU, ADAS, and body electronics. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal stress, eliminating latent short-circuit risk in long-life automotive and industrial deployments. |
| Glass-passivated junction | Enhances moisture resistance and long-term stability of breakdown characteristics versus epoxy-passivated alternatives. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow up to 260 °C peak - compatible with standard lead-free SMT assembly without dry-pack requirements. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., EFT/burst), improving protection margin for downstream ICs like CAN transceivers or microcontrollers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 5–12 V power inputs in engine control units (ECUs) against load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Uni-directional TVS placed between power rail and chassis ground to clamp positive-going surges only. Use Value: With 12.0 V clamping at 125 A and AEC-Q101 qualification, SMCJ7.0HE3/9AT ensures system-level compliance without derating or parallel staging. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on 7 V reference or excitation lines, absorbing induced spikes from relay coil switching or motor noise. Use Value: 7.0 V VWM provides headroom above sensor supply while 1500 W PPPM handles multi-pulse industrial surge standards (IEC 61000-4-5). |
| DC-DC Converter Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Front-end protection for 7–9 V input of isolated DC-DC converters in railway signaling equipment. IC Role / Device Role / Timing Role: Primary surge limiter on converter input, coordinated with upstream fuse and downstream LC filtering. Use Value: 12.0 V VC limits stress on primary-side MOSFET gate drivers and controller ICs during 10/1000 µs lightning-induced surges. |
Use Scenario: Secondary-side transient suppression on 7 V bias rails feeding optical transceiver modules in base station line cards. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector interface to prevent latch-up in SerDes ICs. Use Value: Sub-ns response and 200 µA ID at VWM preserve signal integrity and minimize standby power loss in always-on telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0AHE3/A | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VBR range and AEC-Q101/HE3 qualification. | Suitable for space-constrained or lower-energy surge environments (e.g., USB port protection), not for full load-dump duty. | Select SMAJ7.0AHE3/A only if board area is critical and peak surge energy remains ≤400 W. |
| SMCJ7.0A-E3/9AT | Same DO-214AB package and electrical specs, but commercial-grade (E3) - no AEC-Q101 or JESD 201 Class 2 qualification. | Acceptable for non-automotive industrial or consumer applications where automotive reliability testing is not mandated. | Choose SMCJ7.0A-E3/9AT for cost-sensitive designs where AEC-Q101 is unnecessary and whisker resistance is not required. |
Compared with SMAJ7.0AHE3/A and SMCJ7.0A-E3/9AT, the SMCJ7.0HE3/9AT uniquely combines 1500 W surge capability, AEC-Q101 validation, and JESD 201 Class 2 whisker resistance - making it the only option qualified for under-hood automotive power rail protection without design compromise.
Availability
SMCJ7.0HE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and DC-DC converter input stages requiring stable component supply with guaranteed AEC-Q101 compliance and long-term lifecycle support.
Supply support for SMCJ7.0HE3/9AT 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure modes must be eliminated through rigorous qualification and proven thermal robustness.
FAQ
What is the clamping voltage of the SMCJ7.0HE3/9AT and how is it measured?
The SMCJ7.0HE3/9AT has a maximum clamping voltage (VC) of 12.0 V at 125 A peak pulse current, tested with a standardized 10/1000 µs double-exponential surge waveform. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events, ensuring protected components remain within safe operating limits. The 12.0 V VC is directly specified in Vishay's official datasheet (Doc. #88394, Table on page 2) for the SMCJ7.0A variant, which shares identical electrical characteristics with SMCJ7.0HE3/9AT.
Is the SMCJ7.0HE3/9AT qualified for automotive applications?
Yes, the SMCJ7.0HE3/9AT is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and explicitly stated in Vishay's datasheet (page 1, "MECHANICAL DATA" section and page 3, "RATINGS AND CHARACTERISTICS CURVES" note). This qualification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock - validating its suitability for engine control units, body electronics, and ADAS modules where reliability under thermal and vibration stress is mandatory.
What does the "HE3" suffix mean in SMCJ7.0HE3/9AT?
The "HE3" suffix in SMCJ7.0HE3/9AT indicates two key specifications: RoHS-compliant construction (E3) and AEC-Q101 qualification (H), plus compliance with JESD 201 Class 2 for tin whisker resistance. This distinguishes it from the commercial-grade "E3" variant (e.g., SMCJ7.0A-E3/9AT) and confirms its suitability for automotive and high-reliability industrial use. The "9AT" denotes 13-inch tape-and-reel packaging with 3500 units per reel.
Can the SMCJ7.0HE3/9AT be used in bi-directional protection circuits?
No, the SMCJ7.0HE3/9AT is a uni-directional TVS diode, as indicated by the absence of "CA" in its part number and confirmed by its polarity marking (cathode band) and electrical specification table - which lists only uni-directional parameters (e.g., IFSM = 200 A, VF = 3.5 V at 100 A). For bi-directional applications requiring symmetric clamping, Vishay specifies variants with "CA" suffixes such as SMCJ7.0CAHE3/9AT, which are explicitly rated for both polarities.
What is the thermal resistance and maximum power dissipation of the SMCJ7.0HE3/9AT?
The SMCJ7.0HE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads, and a maximum power dissipation (PD) of 6.5 W at TA = 50 °C. These values are critical for calculating steady-state temperature rise during continuous leakage or repeated low-energy transients. Both parameters are documented in Vishay's SMCJ series datasheet (pages 2–3, "THERMAL CHARACTERISTICS" and "MAXIMUM RATINGS" tables) and apply identically to the SMCJ7.0HE3/9AT due to shared DO-214AB packaging and die construction.
SMCJ7.0HE3/9AT 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 112.8A
- 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)
SMCJ7.0HE3/9AT FAQ
1.How can I place an order for SMCJ7.0HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0HE3/9AT 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 SMCJ7.0HE3/9AT reliable?
The price and inventory of SMCJ7.0HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.0HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.0HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0HE3/9AT?
SMCJ7.0HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0HE3/9AT 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 SMCJ7.0HE3/9AT?
For technical support, including SMCJ7.0HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0HE3/9AT requirements.
6.How does Aetrix verify that SMCJ7.0HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0HE3/9AT 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 SMCJ7.0HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.0HE3/9AT?
All SMCJ7.0HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0HE3/9AT, 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 SMCJ7.0HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.0HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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