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Vishay General Semiconductor - Diodes Division SMCG7.5AHE3/9AT
- Part No.:
- SMCG7.5AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG7.5AHE3/9AT.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,145
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Product details
Overview
SMCG7.5AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, featuring 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 (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform. It is AEC-Q101 qualified and used for automotive sensor line protection against inductive switching transients.
For engineers reviewing the SMCG7.5AHE3/9AT datasheet, SMCG7.5AHE3/9AT pinout, SMCG7.5AHE3/9AT application, or SMCG7.5AHE3/9AT equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge, thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification status - all critical for ESD/surge protection design in automotive ECUs and industrial I/O interfaces.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy above its breakdown threshold while maintaining low leakage (<100 µA at VWM) and fast response time. Its glass-passivated junction ensures stable VBR tolerance and robust surge handling per IEC 61000-4-5.
The SMCG7.5AHE3/9AT uses a modified gull-wing leadframe in the DO-215AB outline, optimized for automated SMT placement and compliant with J-STD-002 solderability standards. Its 1500 W PPPM rating is validated on 8.0 mm × 8.0 mm copper pads, and thermal performance is characterized by RθJA = 75 °C/W and RθJL = 15 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum reverse working voltage before clamping begins; defines safe operating margin below breakdown |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - tight breakdown window ensures predictable turn-on across temperature and unit variation |
| VC @ IPPM | 12.9 V at 116.3 A - clamping voltage during 10/1000 µs surge; limits downstream IC stress to safe levels |
| PPPM | 1500 W - peak transient power it can absorb without failure; supports high-energy automotive load-dump immunity |
| ID @ VWM | ≤100 µA - low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard PCB layout; informs heatsinking requirements |
Pinout & Package
Package: SMCG (DO-215AB), surface-mount, gull-wing leads, matte tin-plated, RoHS-compliant, AEC-Q101 qualified. Dimensions: 7.87 mm × 9.64 mm × 2.41 mm (L × W × H), with 0.220–0.245 mm lead width and 0.038–0.058 mm lead thickness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line in unidirectional configuration | Low forward voltage drop (VF = 3.5 V at 100 A) allows use in DC power rail clamping |
| Cathode | Current exit terminal; marked by band on package body | Defines polarity for correct orientation during PCB layout; reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and surge endurance per stress test plan |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in harsh environments |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision for sensitive analog inputs |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets fire-safety requirements for enclosed industrial and automotive systems |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and ground, triggered within picoseconds of overvoltage onset. Use Value: Limits transient voltage to ≤12.9 V, preventing latch-up or gate oxide damage in 5 V or 3.3 V interface ICs. | Use Scenario: Shielding digital input modules in programmable logic controllers from field-wiring induced surges (e.g., relay coil flyback, lightning coupling). IC Role / Device Role / Timing Role: Primary front-end surge clamp on 24 V DC input channels, coordinated with upstream fusing and filtering. Use Value: Absorbs up to 1500 W of transient energy without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 Class 3 compliance. |
| Consumer Power Adapter Protection | Telecom Line Interface Protection |
Use Scenario: Safeguarding secondary-side DC outputs (e.g., 5 V, 12 V rails) in wall adapters and USB PD chargers against output short-circuit recovery spikes. IC Role / Device Role / Timing Role: Secondary-side TVS across output capacitor, activated only during abnormal overvoltage events. Use Value: Low 100 µA leakage avoids standby power penalty; 7.5 V VWM matches common adapter output tolerances. | Use Scenario: Protecting Ethernet PHY or DSL line drivers from induced surges on RJ-45 or telephone line interfaces. IC Role / Device Role / Timing Role: Point-of-entry unidirectional clamp on differential pair or single-ended line-to-ground path. Use Value: 12.9 V clamping voltage aligns with 3.3 V/5 V PHY absolute maximum ratings, preserving signal integrity during surge. |
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-E3/57T | Same VWM (7.5 V), lower PPPM (400 W), SMA (DO-214AC) package, RθJA = 110 °C/W | Limited to lower-energy transients; unsuitable for automotive load-dump testing | Select when cost or board space is prioritized over high-energy surge capability |
| SMCJ7.5AHE3/9AT | Same VWM (7.5 V), identical PPPM (1500 W), but larger SMC (DO-214AB) package with higher thermal mass | Better thermal stability under repeated surges; requires larger PCB footprint | Select when long-term reliability under frequent surge exposure outweighs size constraints |
Compared with SMAJ7.5A-E3/57T, SMCG7.5AHE3/9AT delivers 3.75× higher surge power handling and superior thermal dissipation; versus SMCJ7.5AHE3/9AT, it offers identical protection performance in a 25 % smaller footprint, enabling denser automotive module layouts.
Availability
SMCG7.5AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom line interface hardening requiring stable component supply and AEC-Q101 assurance.
Supply support for SMCG7.5AHE3/9AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, ruggedness, and automotive qualification.
The SMCG series targets high-energy transient suppression in space-constrained automotive and industrial applications, combining AEC-Q101 validation, low-profile packaging, and precise clamping performance.
FAQ
What is the clamping voltage of SMCG7.5AHE3/9AT under a 10/1000 µs surge?
The SMCG7.5AHE3/9AT clamps to a maximum of 12.9 V when subjected to its rated peak pulse current of 116.3 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed on the recommended 8.0 mm × 8.0 mm copper pad layout. The clamping voltage directly determines the maximum stress imposed on downstream circuitry during transient events.
Is SMCG7.5AHE3/9AT suitable for automotive applications?
Yes, SMCG7.5AHE3/9AT is AEC-Q101 qualified and specifically designed for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, UL 94 V-0 molding, and guaranteed operation from –55 °C to +150 °C. These attributes make SMCG7.5AHE3/9AT appropriate for engine control units, ADAS sensor interfaces, and infotainment power rails where reliability under thermal and electrical stress is mandatory.
What does the "HE3" suffix indicate in SMCG7.5AHE3/9AT?
The "HE3" suffix in SMCG7.5AHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "E3" signifies matte tin-plated leads and RoHS compliance per EU Directive 2011/65/EU. The "9AT" denotes packaging in 13-inch diameter tape-and-reel format with 3500 units per reel - a standard logistics configuration for high-volume SMT assembly.
How does the SMCG7.5AHE3/9AT differ from bidirectional variants like SMCG7.5CA?
The SMCG7.5AHE3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC-biased lines such as power rails or single-ended signals referenced to ground. In contrast, SMCG7.5CA is bidirectional, has no polarity marking, and protects AC-coupled or differential lines like RS-485 or CAN bus. Their VBR and VC values differ slightly due to internal structure, and SMCG7.5AHE3/9AT supports forward conduction (IFSM = 200 A), unlike the bidirectional version.
What is the thermal resistance of SMCG7.5AHE3/9AT, and how does it affect layout?
The SMCG7.5AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the specified 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes no additional heatsinking. To maintain TJ ≤ 150 °C under sustained 6.5 W power dissipation, PCB copper area must meet or exceed the reference layout; reducing pad size increases RθJA and risks thermal runaway during repetitive surges.
SMCG7.5AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 (SMCG)
SMCG7.5AHE3/9AT FAQ
1.How can I place an order for SMCG7.5AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG7.5AHE3/9AT 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 SMCG7.5AHE3/9AT reliable?
The price and inventory of SMCG7.5AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG7.5AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG7.5AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG7.5AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG7.5AHE3/9AT?
SMCG7.5AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG7.5AHE3/9AT 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 SMCG7.5AHE3/9AT?
For technical support, including SMCG7.5AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG7.5AHE3/9AT requirements.
6.How does Aetrix verify that SMCG7.5AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG7.5AHE3/9AT 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 SMCG7.5AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG7.5AHE3/9AT?
All SMCG7.5AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG7.5AHE3/9AT, 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 SMCG7.5AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG7.5AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG7.5AHE3/9AT Tags
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