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Vishay General Semiconductor - Diodes Division SMCG75AHE3/9AT
- Part No.:
- SMCG75AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG75AHE3/9AT.pdf
- Description:
- TVS DIODE 75VWM 121VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,541
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Product details
Overview
SMCG75AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for robust overvoltage protection of sensitive electronics. It features a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 12.4 A peak pulse current (IPPM), and clamps transients to ≤121 V at rated surge. It is AEC-Q101 qualified and used in automotive power line and sensor interface protection.
For engineers reviewing the SMCG75AHE3/9AT datasheet, SMCG75AHE3/9AT pinout, SMCG75AHE3/9AT application, or SMCG75AHE3/9AT equivalent, this page delivers verified electrical parameters, mechanical package details, real-world use cases, and validated alternative parts - all aligned with Vishay's official 88457 specification revision (09-Jan-2024).
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ns) to ESD and lightning-induced surges. Its unidirectional polarity enables integration into DC-biased signal and power rails where reverse conduction must be blocked.
Rated for 1500 W peak pulse power (10/1000 µs waveform) and 200 A non-repetitive forward surge (8.3 ms half-sine), it operates across –55 °C to +150 °C junction temperature with 75 °C/W junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR min/max | 83.3 V / 92.1 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on under surge conditions. |
| VC @ IPPM | ≤121 V at 12.4 A - Clamping voltage during full-rated 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 1500 W - Peak surge energy handling capability; supports high-energy transients per IEC 61000-4-5 Level 4. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
| Package | SMCG (DO-215AB) - Low-profile SMD outline with gull-wing leads; compatible with automated reflow assembly. |
Pinout & Package
SMCG75AHE3/9AT uses the SMCG (DO-215AB) package: a surface-mount, gull-wing leaded case with cathode band marking. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102. Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in unidirectional configuration. | Defines polarity-sensitive placement; must be tied to lower potential side of protected line. |
| Cathode | Current exit terminal in forward bias; marked by band; connects to protected line (e.g., 12 V rail or sensor output). | Surge current flows cathode→anode during clamping; correct orientation prevents unintended conduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces. |
| Low incremental surge resistance | Enables tighter clamping (VC = 121 V) without excessive voltage overshoot during fast transients. |
| Glass passivated junction | Improves long-term stability and moisture resistance versus epoxy-passivated alternatives. |
| MSL Level 1 rating | Allows unlimited floor life and reflow up to 260 °C peak - no baking required prior to assembly. |
| 1500 W peak pulse power | Supports IEC 61000-4-5 4th-level surge immunity (4 kV line-to-ground, 2 kV line-to-line) in properly laid-out PCBs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive-going surges above 75 V. Use Value: Limits voltage seen by downstream regulators and microcontrollers to ≤121 V, preventing latch-up or permanent damage. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb ESD events and cable discharge transients. Use Value: Maintains signal integrity by suppressing >8 kV contact ESD (IEC 61000-4-2) without affecting 0–5 V output range. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Shielding RS-485 transceivers on outdoor telecom node PCBs from induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant family member used in unidirectional mode on VCC-supplied data lines. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W while maintaining <1 µA leakage at 75 V. |
Use Scenario: Adding secondary overvoltage protection after primary AC-DC rectification in USB-C PD adapters. IC Role / Device Role / Timing Role: Fast-clamping TVS on DC bus to prevent capacitor overvoltage during startup faults or feedback loop failure. Use Value: Activates within nanoseconds to limit bus voltage to 121 V, protecting MOSFETs and controllers rated for 135 V max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75A-E3/57T | Same VWM (75 V), lower PPPM (400 W), SMA (DO-214AC) package, 5.5 mm × 4.6 mm footprint. | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance. | Select when board space is constrained and surge requirements are ≤400 W. |
| SMCJ75AHE3/9AT | Same VWM (75 V), higher PPPM (1500 W), identical SMCG (DO-215AB) package, but rated for 1500 W at 10/1000 µs with VC = 121 V. | Functionally identical clamping performance and automotive qualification; differs only in part numbering convention. | Direct form-fit-function replacement; same reel packaging (9AT) and AEC-Q101 status. |
Compared with SMCG75AHE3/9AT, SMAJ75A-E3/57T offers smaller size but significantly reduced surge capacity, while SMCJ75AHE3/9AT matches all key ratings and qualifications - making it a seamless drop-in option where documentation references the SMCJ prefix.
Availability
SMCG75AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance and 13" tape-and-reel logistics.
Supply support for SMCG75AHE3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMCG series was developed specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and 1500 W surge capability.
FAQ
What is the clamping voltage of SMCG75AHE3/9AT at its rated peak pulse current?
The SMCG75AHE3/9AT clamps to a maximum of 121 V when subjected to its rated 12.4 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay document 88457, ensuring predictable overvoltage limiting for downstream ICs.
Is SMCG75AHE3/9AT suitable for automotive applications?
Yes, SMCG75AHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its –55 °C to +150 °C operating range, glass-passivated junction, and 1500 W surge capability meet requirements for engine control, body electronics, and ADAS sensor protection per ISO 7637-2 and ISO 16750-2.
What does the "HE3" suffix indicate in SMCG75AHE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering nomenclature, HE3 identifies the industrial-grade, AEC-Q101-qualified version with matte tin-plated leads - distinguishing it from E3 (RoHS, non-automotive) and HM3 (halogen-free + AEC-Q101) variants.
Can SMCG75AHE3/9AT be used in bidirectional configurations?
No - SMCG75AHE3/9AT is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix. Bidirectional operation requires the CA variant (e.g., SMCG75CA). Using SMCG75AHE3/9AT in reverse-biased AC circuits would result in forward conduction and failure.
What is the thermal resistance of SMCG75AHE3/9AT, and how does it affect layout?
SMCG75AHE3/9AT has a typical RθJA of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C at full 6.5 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks - especially critical in automotive under-hood deployments.
SMCG75AHE3/9AT 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SMCG75AHE3/9AT FAQ
1.How can I place an order for SMCG75AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG75AHE3/9AT 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 SMCG75AHE3/9AT reliable?
The price and inventory of SMCG75AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG75AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG75AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG75AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG75AHE3/9AT?
SMCG75AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG75AHE3/9AT 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 SMCG75AHE3/9AT?
For technical support, including SMCG75AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG75AHE3/9AT requirements.
6.How does Aetrix verify that SMCG75AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG75AHE3/9AT 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 SMCG75AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG75AHE3/9AT?
All SMCG75AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG75AHE3/9AT, 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 SMCG75AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG75AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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