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Vishay General Semiconductor - Diodes Division SMCJ7.5AHE3/9AT
- Part No.:
- SMCJ7.5AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5AHE3/9AT.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,454
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Product details
Overview
SMCJ7.5AHE3/9AT 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 7.5 V stand-off voltage (VWM), 12.9 V maximum clamping voltage (VC) at 116.3 A peak pulse current, and 1500 W peak pulse power rating with a 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the SMCJ7.5AHE3/9AT datasheet, SMCJ7.5AHE3/9AT pinout, SMCJ7.5AHE3/9AT application, or SMCJ7.5AHE3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, low 0.067 %/°C VBR temperature coefficient, 100 µA max reverse leakage at VWM, SMC (DO-214AB) package compatibility with automated placement, and unidirectional polarity marking for cathode identification.
Technical Context
The SMCJ7.5AHE3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering fast response (<1 ps) to transients induced by inductive switching or ESD events. Its breakdown voltage range is 8.33–9.21 V at 1.0 mA test current, and it maintains stable clamping performance across -55 °C to +150 °C junction temperature.
Designed for surface-mount implementation on 8.0 mm × 8.0 mm copper pads per terminal, it achieves 1500 W surge handling with low incremental surge resistance and meets J-STD-020 MSL Level 1 (260 °C reflow peak). The device is RoHS-compliant and qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - Ensures reliable turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 12.9 V at 116.3 A - Limits downstream voltage stress during 10/1000 µs surge events |
| IPPM | 116.3 A - Peak surge current capability under standardized 10/1000 µs waveform |
| PPPM | 1500 W - Sustains high-energy transients without failure when mounted per recommended pad layout |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures |
| Temp. Coeff. | 0.067 %/°C - Minimizes VBR drift over temperature for stable protection threshold |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side of protected circuit (e.g., ground or return) |
| Cathode | Avalanche clamping node | Marked with band; connected to higher-potential line (e.g., 12 V rail or signal source) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes let-through voltage during surge, protecting sensitive downstream ICs |
| MSL Level 1 compliance | Enables standard reflow assembly without pre-baking or special handling |
| 1500 W peak pulse rating | Handles ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge waveforms in automotive systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp surges exceeding 12 V. Use Value: Clamps to 12.9 V within nanoseconds, preventing damage to 16-bit MCUs rated for ≤16 V absolute maximum. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA transmitter) from ESD and field wiring transients. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: 100 µA leakage at 7.5 V ensures minimal impact on loop accuracy while providing sub-13 V clamping. |
| DC-DC Converter Input Stage | Consumer Power Adapter Output |
Use Scenario: Safeguarding buck converter IC inputs from reflected transients originating in upstream AC/DC stage. IC Role / Device Role / Timing Role: Primary-side TVS on VIN pin to limit voltage excursions during MOSFET switching noise coupling. Use Value: 1500 W rating absorbs repetitive 100 ns–1 µs spikes common in high-frequency switching converters. | Use Scenario: Overvoltage suppression on USB-C PD adapter 5 V/9 V/15 V output rails. IC Role / Device Role / Timing Role: Secondary-side unidirectional TVS tied between regulated output and ground. Use Value: 7.5 V VWM allows safe operation at 9 V output while clamping fault conditions to ≤12.9 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A-E3/61T | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable only for lower-energy transients; not AEC-Q101 qualified | Select when board space is constrained and surge energy < 200 W is expected |
| 1.5SMC7.5A | Same SMC package, identical VWM/VC, but no AEC-Q101 qualification; different thermal derating curve | Lacks automotive qualification documentation and extended reliability testing | Choose for cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with SMAJ7.5A-E3/61T and 1.5SMC7.5A, the SMCJ7.5AHE3/9AT delivers 3.75× higher surge power handling, automotive-grade reliability validation, and tighter thermal resistance (RθJA = 75 °C/W), making it optimal for mission-critical 12 V system protection.
Availability
SMCJ7.5AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and DC-DC converter input protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ7.5AHE3/9AT 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 application-specific performance.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the SMCJ7.5AHE3/9AT under maximum surge conditions?
The SMCJ7.5AHE3/9AT has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 116.3 A using a 10/1000 µs waveform. This value is measured at TA = 25 °C on specified 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ7.5AHE3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ7.5AHE3/9AT qualified for automotive applications?
Yes, the SMCJ7.5AHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 requirements. The SMCJ7.5AHE3/9AT is intended for under-hood and chassis-mounted automotive modules where reliability under thermal and mechanical stress is critical.
What does the "9AT" suffix indicate in SMCJ7.5AHE3/9AT?
"9AT" is Vishay's preferred package code denoting 13-inch diameter plastic tape-and-reel packaging containing 3500 units per reel. This format supports high-volume automated SMT placement and is compatible with industry-standard pick-and-place equipment. The SMCJ7.5AHE3/9AT uses the same SMC (DO-214AB) package and electrical specifications as other variants in the family - only the packaging and reel configuration differ.
How does the SMCJ7.5AHE3/9AT compare to bidirectional TVS diodes like SMCJ7.5CA?
The SMCJ7.5AHE3/9AT is unidirectional and features a cathode band for polarity identification, enabling use in DC circuits where reverse voltage blocking is required. In contrast, SMCJ7.5CA is bidirectional with symmetrical clamping in both directions and no polarity marking. The SMCJ7.5AHE3/9AT offers lower leakage (100 µA at VWM) than the CA version at equivalent voltages and is optimized for single-polarity rail protection - the SMCJ7.5AHE3/9AT cannot replace bidirectional types in AC or floating-signal applications.
What is the thermal resistance of the SMCJ7.5AHE3/9AT, and how does it affect PCB layout?
The SMCJ7.5AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures during repeated surges, PCB layout must replicate this pad area and ensure adequate copper pour connectivity. Reducing pad size increases RθJA, risking thermal runaway - the SMCJ7.5AHE3/9AT's performance is validated only with the specified mounting conditions.
SMCJ7.5AHE3/9AT 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 116.3A
- 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)
SMCJ7.5AHE3/9AT FAQ
1.How can I place an order for SMCJ7.5AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5AHE3/9AT 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 SMCJ7.5AHE3/9AT reliable?
The price and inventory of SMCJ7.5AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.5AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5AHE3/9AT?
SMCJ7.5AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5AHE3/9AT 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 SMCJ7.5AHE3/9AT?
For technical support, including SMCJ7.5AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ7.5AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5AHE3/9AT 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 SMCJ7.5AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.5AHE3/9AT?
All SMCJ7.5AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5AHE3/9AT, 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 SMCJ7.5AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.5AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5AHE3/9AT Tags
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