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Vishay General Semiconductor - Diodes Division SMCJ7.0AHE3/9AT
- Part No.:
- SMCJ7.0AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0AHE3/9AT.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,421
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Product details
Overview
SMCJ7.0AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA, 12.0 V maximum clamping voltage (VC) at 125 A peak pulse current, and 1500 W peak pulse power rating with a 10/1000 μs waveform - deployed in automotive engine control units to protect 5 V–12 V microcontroller I/O and sensor interfaces.
For engineers reviewing the SMCJ7.0AHE3/9AT datasheet, SMCJ7.0AHE3/9AT pinout, SMCJ7.0AHE3/9AT application, or SMCJ7.0AHE3/9AT equivalent, key selection criteria include clamping performance under 125 A surge, AEC-Q101 qualification status, SMC (DO-214AB) package thermal resistance (RθJL = 15 °C/W), and unidirectional polarity marking for correct PCB orientation during automated placement.
Technical Context
The SMCJ7.0AHE3/9AT operates as a silicon avalanche diode that enters controlled breakdown above its VWM of 7.0 V, limiting transient voltages to ≤12.0 V at 125 A. Its glass-passivated junction ensures stable leakage (<200 μA at VWM) and fast response time (<1.0 ps), enabling suppression of ESD, load dump, and inductive switching spikes before downstream IC damage occurs.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it delivers 6.5 W steady-state power dissipation at TA = 50 °C and supports peak forward surge current up to 200 A (8.3 ms half-sine). The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive underhood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for protection of 5 V–12 V logic rails. |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction during normal operation. |
| VC @ IPPM | 12.0 V at 125 A - Clamping voltage limits stress on protected ICs during worst-case 1500 W transients. |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 μs waveform, suitable for ISO 7637-2 Pulse 1/2/5a compliance testing. |
| ID @ VWM | <200 μA - Low reverse leakage preserves battery life and avoids false triggering in low-power sensor nodes. |
| TJ max | +150 °C - Junction temperature rating enables use in under-hood automotive environments without derating. |
| RθJL | 15 °C/W - Low junction-to-lead thermal resistance supports high-energy surge dissipation through PCB copper traces. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected circuit side connection | Connected to the line being protected (e.g., MCU VDD or CAN_H); clamps to ground when transient exceeds VWM. |
| Anode (unbanded end) | Reference/ground return path | Typically tied to system ground plane; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood use including temperature cycling, humidity, and mechanical shock per JEDEC standards. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage across 150 °C operating range and >1000-hour HTOL stress. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients, improving clamping precision for fast-rising ESD or lightning-induced surges. |
| MSL Level 1 (260 °C peak) | Enables standard reflow soldering without moisture sensitivity concerns or baking requirements prior to assembly. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS-compliant construction; HM3 variant adds halogen-free molding compound for stringent environmental compliance. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
|
Use Scenario: Protects 12 V supply rail and sensor interface lines (e.g., MAP, TPS) from load dump transients up to 35 V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between power input and LDO regulator input. Use Value: Limits transient voltage to ≤12.0 V, preventing latch-up or gate oxide rupture in downstream 3.3 V/5 V MCUs and analog front-ends. |
Use Scenario: Shields 24 V digital input optocoupler circuits from field-wiring induced surges during maintenance or cable disconnect events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact input stage, upstream of series current-limiting resistor. Use Value: Absorbs 1500 W pulses without degradation, maintaining <200 μA leakage to ensure clean logic-level detection during standby. |
| Telecom Base Station Power Supply | Consumer Appliance Motor Drive Board |
|
Use Scenario: Guards +48 V DC-DC converter inputs against lightning-induced surges on outdoor telecom cabinet power feeds. IC Role / Device Role / Timing Role: First-line transient suppressor before bulk capacitance and primary FET gate drivers. Use Value: Clamps 10/1000 μs surges to 12.0 V within nanoseconds, preserving MOSFET gate oxide integrity and avoiding false shutdown triggers. |
Use Scenario: Safeguards microcontroller GPIOs connected to hall-effect motor position sensors exposed to brush-commutator noise. IC Role / Device Role / Timing Role: Localized TVS on sensor signal trace, adjacent to connector entry point. Use Value: Sub-1 ns response time prevents ESD-induced reset or ADC corruption during motor startup and commutation events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0AHE3/9AT | Lower PPPM (400 W), smaller SMA (DO-214AC) package, higher RθJA (100 °C/W). | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD), not ISO 7637-2 load dump. | Select when board space is constrained and surge energy does not exceed 400 W. |
| SMCJ7.0CAHE3/9AT | Bidirectional configuration; symmetric VBR (7.78–8.60 V) in both polarities; same PPPM and VC. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal may occur. | Choose for bidirectional protection; note that unidirectional SMCJ7.0AHE3/9AT cannot replace it on AC signals. |
Compared with SMAJ7.0AHE3/9AT, the SMCJ7.0AHE3/9AT provides 275 % higher surge power handling and superior thermal coupling via SMC package; versus SMCJ7.0CAHE3/9AT, it offers optimized clamping for DC rails but lacks reverse-polarity protection - requiring careful signal topology alignment.
Availability
SMCJ7.0AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC input modules, telecom power supplies, and consumer appliance motor control boards requiring stable component supply and AEC-Q101 assurance.
Supply support for SMCJ7.0AHE3/9AT 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, automotive qualification, and high-power handling.
The SMCJ7.0AHE3/9AT belongs to Vishay's TRANSZORB® SMCJ family, engineered specifically for high-energy transient suppression in harsh automotive and industrial environments where AEC-Q101 compliance and 1500 W surge capability are mandatory.
FAQ
What is the clamping voltage of the SMCJ7.0AHE3/9AT at its rated peak pulse current?
The SMCJ7.0AHE3/9AT has a maximum clamping voltage (VC) of 12.0 V at 125 A peak pulse current (IPPM), measured using a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and ensures protected ICs experience no more than 12.0 V during worst-case transients. The SMCJ7.0AHE3/9AT achieves this with low incremental surge resistance and a glass-passivated junction for consistent performance.
Is the SMCJ7.0AHE3/9AT qualified for automotive applications?
Yes, the SMCJ7.0AHE3/9AT carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. It has passed stress tests including temperature cycling, high-temperature operating life, and mechanical shock per AEC-Q101 Rev D. The SMCJ7.0AHE3/9AT is approved for use in engine control units, body control modules, and other under-hood automotive systems requiring validated reliability.
What is the package type and mounting requirement for the SMCJ7.0AHE3/9AT?
The SMCJ7.0AHE3/9AT uses the SMC (DO-214AB) surface-mount package with matte tin-plated leads. It requires mounting on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated 1500 W pulse handling. The SMCJ7.0AHE3/9AT is MSL Level 1 compliant and supports standard lead-free reflow profiles up to 260 °C peak without pre-baking.
How does the SMCJ7.0AHE3/9AT differ from the bidirectional SMCJ7.0CAHE3/9AT?
The SMCJ7.0AHE3/9AT is unidirectional with cathode band marking and clamps only in reverse bias, while the SMCJ7.0CAHE3/9AT is bidirectional with no polarity marking and clamps symmetrically in both directions. Both share identical VBR, VC, and PPPM ratings, but the SMCJ7.0AHE3/9AT is intended for DC rail protection, whereas the CA version suits AC or floating differential lines like CAN or RS-485. They are not interchangeable without circuit review.
What is the maximum reverse leakage current for the SMCJ7.0AHE3/9AT at its stand-off voltage?
The SMCJ7.0AHE3/9AT exhibits a maximum reverse leakage current (ID) of 200 μA at its 7.0 V stand-off voltage (VWM), tested at TA = 25 °C. This low leakage ensures minimal power loss in always-on systems and avoids false triggering in high-impedance sensor interfaces. The SMCJ7.0AHE3/9AT maintains leakage below 1 mA even at TJ = 125 °C, supporting reliable operation in thermally demanding environments.
SMCJ7.0AHE3/9AT 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 125A
- 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)
SMCJ7.0AHE3/9AT FAQ
1.How can I place an order for SMCJ7.0AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0AHE3/9AT 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 SMCJ7.0AHE3/9AT reliable?
The price and inventory of SMCJ7.0AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.0AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.0AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0AHE3/9AT?
SMCJ7.0AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0AHE3/9AT 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 SMCJ7.0AHE3/9AT?
For technical support, including SMCJ7.0AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ7.0AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0AHE3/9AT 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 SMCJ7.0AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.0AHE3/9AT?
All SMCJ7.0AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0AHE3/9AT, 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 SMCJ7.0AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.0AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.0AHE3/9AT Tags
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