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Vishay General Semiconductor - Diodes Division SMCJ7.5HE3/9AT
- Part No.:
- SMCJ7.5HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5HE3/9AT.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,622
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Product details
Overview
SMCJ7.5HE3/9AT 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 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, 12.9 V clamping voltage (VC) at 116.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the SMCJ7.5HE3/9AT datasheet, SMCJ7.5HE3/9AT pinout, SMCJ7.5HE3/9AT application, or SMCJ7.5HE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability, low clamping ratio (VC/VWM = 1.72), and RoHS-compliant HE3 whisker-tested terminations - critical for automotive-grade ESD and load-dump protection design validation.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 7.5 V), but triggers into low-impedance conduction when transients exceed VBR, limiting downstream voltage to ≤12.9 V at 116.3 A. Its glass-passivated junction ensures stable breakdown characteristics and fast response (<1 ns), while the DO-214AB package supports automated placement and meets UL 94 V-0 flammability.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 75 °C/W (on 8 mm × 8 mm copper pads) and RθJL = 15 °C/W, enabling reliable operation in thermally constrained automotive ECUs and industrial motor drives without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse working voltage before leakage exceeds 100 μA; defines safe operating margin below clamping threshold |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - precise breakdown window ensures consistent turn-on across production lots and temperature |
| VC @ IPPM | 12.9 V at 116.3 A - clamping voltage limits protected circuit stress during 10/1000 µs surges, critical for 12 V system compatibility |
| PPPM | 1500 W - peak pulse power handling per single transient, sufficient for ISO 7637-2 Pulse 1/2a/5a automotive load-dump events |
| Junction Temp Range | -55 °C to +150 °C - enables deployment in under-hood automotive modules and industrial power converters |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD per JESD22-A114, supporting functional safety designs |
| Package | DO-214AB (SMCJ) - surface-mount outline with 0.320" body length, optimized for high-current PCB pad layouts and automated assembly |
Pinout & Package
DO-214AB (SMCJ) package: molded plastic case with J-bend leads, cathode indicated by band on one end; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, qualified to JESD 201 Class 2 whisker test (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms current path during reverse-biased clamping event |
| Cathode (banded end) | High-side transient input terminal | Connected to protected line (e.g., 12 V supply or CAN bus); absorbs surge energy into ground via anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use with extended temperature cycling, high-temp reverse bias, and mechanical shock testing |
| Glass-passivated junction | Ensures stable VBR tolerance and low parameter drift over lifetime, critical for long-term field reliability |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump up to 60 V, 100 ms) when properly heatsinked on 8 mm × 8 mm copper pads |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power rails in engine control units (ECUs) against load-dump transients up to 60 V and inductive switching spikes. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between battery feed and local regulator input, clamping within nanoseconds. Use Value: Limits voltage seen by downstream DC/DC converters to ≤12.9 V, preventing latch-up or overvoltage damage during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding analog front-end inputs of pressure or temperature sensors connected to noisy factory-floor PLCs. IC Role / Device Role / Timing Role: Bidirectional-capable protection (though SMCJ7.5HE3/9AT is unidirectional, used in grounded-signal configuration) placed at connector entry point. Use Value: Clamps ESD (IEC 61000-4-2 ±15 kV) and fast transients (IEC 61000-4-4 ±2 kV) before they reach precision ADC inputs, preserving measurement integrity. |
| Telecom DC Power Input | Consumer Power Adapter Output |
Use Scenario: Securing 48 V DC input stages of base station remote radio units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC/DC isolation stage, coordinated with upstream MOVs. Use Value: Delivers 1500 W surge handling with sub-1 ns response, reducing let-through energy to <10 mJ - well below failure thresholds of SiC MOSFET gate drivers. | Use Scenario: Protecting USB-C PD output ports in multi-port chargers from reverse-connected or faulty cables inducing 20 V+ transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and ground, triggered only during overvoltage faults. Use Value: Maintains 7.5 V nominal operation while clamping to 12.9 V, ensuring compliance with USB PD 3.1 VCONN and SOP timing margins during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient 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), same VWM/VC specs | Suitable for space-constrained consumer electronics; insufficient for automotive load-dump duty cycle | Select when board area is limited and surge energy is ≤400 W (e.g., USB data lines) |
| SMCJ7.5AHE3/9AT | Identical electrical specs and AEC-Q101 qualification; differs only in marking code (GDP vs. BDP) and packaging tape size | No functional difference; both meet same automotive reliability standards and thermal performance | Direct form-fit-function replacement; interchangeability confirmed by Vishay documentation |
Compared with SMAJ7.5A-E3/61T, SMCJ7.5HE3/9AT delivers 275 % higher surge power and lower thermal resistance, making it suitable for harsh environments; versus SMCJ7.5AHE3/9AT, it is electrically identical with no design impact - differing only in internal lot traceability and reel quantity.
Availability
SMCJ7.5HE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom DC input staging, and consumer power adapter output regulation requiring stable component supply across high-volume production cycles.
Supply support for SMCJ7.5HE3/9AT 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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was engineered specifically for high-energy transient suppression in automotive and industrial systems, targeting ISO 7637-2 and IEC 61000-4-x compliance with AEC-Q101 validation and robust thermal performance in DO-214AB packaging.
FAQ
What is the clamping voltage of SMCJ7.5HE3/9AT at its rated peak pulse current?
The SMCJ7.5HE3/9AT has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current (IPPM) of 116.3 A using a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream 12 V logic and power circuits. The SMCJ7.5HE3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCJ7.5HE3/9AT suitable for automotive applications?
Yes, SMCJ7.5HE3/9AT is AEC-Q101 qualified and explicitly designed for automotive use, including under-hood engine control units and body electronics. Its construction includes glass-passivated junctions, JESD 201 Class 2 whisker-tested terminations (HE3 suffix), and thermal ratings up to +150 °C junction temperature. The SMCJ7.5HE3/9AT meets requirements for ISO 7637-2 load-dump and inductive-switching transient suppression in 12 V systems.
What does the "HE3" suffix indicate in SMCJ7.5HE3/9AT?
The "HE3" suffix in SMCJ7.5HE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance on matte tin-plated leads. It distinguishes the part from commercial-grade "E3" variants and confirms compliance with automotive reliability standards, including extended temperature cycling and high-temperature reverse bias testing. The SMCJ7.5HE3/9AT is not interchangeable with non-HE3 versions in automotive designs requiring formal qualification evidence.
How does SMCJ7.5HE3/9AT differ from bi-directional SMCJ7.5CA variants?
The SMCJ7.5HE3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC line-to-ground protection; SMCJ7.5CA is bi-directional, unmarked, and suited for AC or floating signal lines. Their VBR, VC, and PPPM are identical, but SMCJ7.5HE3/9AT cannot protect against positive-going transients on grounded lines without additional circuitry. The SMCJ7.5HE3/9AT requires correct orientation during placement to function as specified.
What PCB layout guidance applies to SMCJ7.5HE3/9AT for optimal thermal and surge performance?
For optimal performance, mount SMCJ7.5HE3/9AT on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve specified RθJA = 75 °C/W and sustain 1500 W surge capability. Avoid narrow traces between the device and ground plane; use multiple thermal vias under pads if layer stack permits. The SMCJ7.5HE3/9AT must be placed as close as possible to the protected connector or IC input to minimize inductance and preserve clamping effectiveness.
SMCJ7.5HE3/9AT 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 104.9A
- 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)
SMCJ7.5HE3/9AT FAQ
1.How can I place an order for SMCJ7.5HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5HE3/9AT 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 SMCJ7.5HE3/9AT reliable?
The price and inventory of SMCJ7.5HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.5HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5HE3/9AT?
SMCJ7.5HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5HE3/9AT 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 SMCJ7.5HE3/9AT?
For technical support, including SMCJ7.5HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5HE3/9AT requirements.
6.How does Aetrix verify that SMCJ7.5HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5HE3/9AT 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 SMCJ7.5HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.5HE3/9AT?
All SMCJ7.5HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5HE3/9AT, 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 SMCJ7.5HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.5HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5HE3/9AT Tags
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