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Vishay General Semiconductor - Diodes Division SMCG12A-E3/9AT
- Part No.:
- SMCG12A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG12A-E3/9AT.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,403
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Product details
Overview
SMCG12A-E3/9AT 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 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 75.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) capability with 10/1000 µs waveform.
For engineers reviewing the SMCG12A-E3/9AT datasheet, SMCG12A-E3/9AT pinout, SMCG12A-E3/9AT application, or SMCG12A-E3/9AT equivalent, this device is selected for automotive-grade ESD/surge protection on power rails and signal lines where AEC-Q101 qualification, low incremental surge resistance, and fast response time (<1 ns) are critical design requirements.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction to achieve stable breakdown behavior and low leakage (<5 µA at VWM). Its thermal resistance (RθJA = 75 °C/W) and junction temperature range (–55 °C to +150 °C) support operation in high-reliability industrial and automotive environments without forced cooling.
The SMCG12A-E3/9AT is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C lead-free reflow compatibility. Its DO-215AB package enables automated placement while maintaining mechanical robustness per UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 19.9 V at 75.4 A - Clamping voltage under 10/1000 µs surge defines maximum stress imposed on protected downstream circuitry. |
| PPPM | 1500 W - Peak pulse power handling capacity determines survivability against IEC 61000-4-5 Level 4 surges (e.g., 4 kV line-to-line). |
| ID @ VWM | ≤5 µA - Low reverse leakage preserves system efficiency and minimizes standby power loss in battery-powered applications. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive locations and high-ambient industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules requiring reliability across temperature cycling, humidity, and mechanical shock. |
Pinout & Package
Package: SMCG (DO-215AB) - Surface-mount gull-wing package with matte tin-plated leads, 0.31" × 0.31" copper pad layout recommended for thermal performance. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or lower-potential rail in unidirectional configuration. | Provides low-impedance path for surge current to return to reference plane during clamping events. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line (e.g., 12 V supply or signal trace). | Defines polarity-sensitive connection-reversal prevents clamping and risks device failure under overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-defect field performance. |
| MSL Level 1 rating | Enables direct placement onto PCBs without baking, reducing manufacturing complexity and cost in high-volume SMT lines. |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for safety-critical applications in consumer, industrial, and transportation equipment. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulses), improving protection margin for MOSFET gate drivers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 19.9 V. Use Value: Prevents damage to voltage regulators and microcontrollers by limiting peak rail voltage to ≤19.9 V during 100 V/100 ms load dump events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt fast transients before reaching precision ADC front-end. Use Value: Maintains signal integrity by suppressing >8 kV contact ESD (IEC 61000-4-2) with sub-nanosecond response and <5 µA leakage at 12 V. |
| Telecom DC Power Input Protection | Consumer Device USB Power Line Protection |
|
Use Scenario: Safeguarding PoE-powered network switches against induced lightning surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary clamping device in series with upstream fuse, sized for 1500 W 10/1000 µs waveform compliance. Use Value: Absorbs up to 1500 W surge energy without degradation, enabling single-stage protection architecture and reducing BOM count. |
Use Scenario: Protecting USB-C VBUS lines in portable chargers and power banks from hot-plug voltage spikes and reverse-current faults. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp overvoltage while preserving 5–20 V PD negotiation range. Use Value: Clamps transients to ≤19.9 V without affecting USB PD communication, supporting full 100 W charging compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/57T | Same VWM (12 V) and VC (20.1 V), but lower PPPM (400 W); SMA (DO-214AC) package with higher RθJA (110 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for load-dump or lightning surge scenarios. | Select when cost and board space are prioritized over high-energy surge immunity and thermal performance. |
| SMCJ12A-E3/9AT | Same VWM (12 V) and VC (20.1 V), identical PPPM (1500 W), but larger SMC (DO-214AB) package with higher mounting mass and 1.5× footprint area. | Offers equivalent surge rating but requires more PCB real estate and may limit routing density in compact designs. | Choose when existing SMC footprint is standardized and DO-215AB rework is not feasible. |
Compared with SMAJ12A-E3/57T and SMCJ12A-E3/9AT, the SMCG12A-E3/9AT delivers identical 1500 W surge capability in the smallest qualified DO-215AB footprint, enabling higher board density and superior thermal performance (RθJA = 75 °C/W) for automotive and industrial applications demanding AEC-Q101 validation.
Availability
SMCG12A-E3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power inputs, and consumer USB-C power delivery systems requiring stable component supply and long-term lifecycle assurance.
Supply support for SMCG12A-E3/9AT 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMCG series was developed specifically for AEC-Q101-compliant transient suppression in space-constrained automotive and industrial applications, emphasizing low-profile packaging, high surge robustness, and process-controlled parametric consistency.
FAQ
What is the clamping voltage of the SMCG12A-E3/9AT under standard test conditions?
The SMCG12A-E3/9AT has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current (IPPM) of 75.4 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG12A-E3/9AT maintains this clamping performance across its operational temperature range.
Is the SMCG12A-E3/9AT suitable for bidirectional transient protection?
No, the SMCG12A-E3/9AT is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay offers the SMCG12CA variant. Using the SMCG12A-E3/9AT in reverse-biased configurations will not provide symmetrical clamping and may result in device failure. Always verify polarity alignment during PCB layout for the SMCG12A-E3/9AT.
Does the SMCG12A-E3/9AT meet automotive qualification standards?
Yes, the SMCG12A-E3/9AT is AEC-Q101 qualified, confirming its reliability for automotive applications including engine control units, body electronics, and ADAS sensors. This qualification covers stress tests for temperature cycling, humidity, mechanical shock, and surge endurance. The "E3" suffix denotes RoHS-compliant, industrial-grade construction validated to this standard.
What is the recommended PCB pad layout for optimal thermal performance of the SMCG12A-E3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area for each terminal of the SMCG12A-E3/9AT to achieve its rated thermal resistance (RθJA = 75 °C/W). Reduced pad size increases junction temperature under surge conditions and may compromise long-term reliability. The SMCG12A-E3/9AT datasheet provides exact dimensional drawings for DO-215AB mounting.
How does the SMCG12A-E3/9AT compare to SMAJ12A in terms of surge handling capability?
The SMCG12A-E3/9AT delivers 1500 W peak pulse power (PPPM), whereas the SMAJ12A is rated for only 400 W. This threefold increase allows the SMCG12A-E3/9AT to withstand higher-energy transients such as ISO 16750-2 load dump or IEC 61000-4-5 surge events. Both share 12 V VWM, but the SMCG12A-E3/9AT's lower RθJA (75 vs. 110 °C/W) further enhances sustained surge resilience.
SMCG12A-E3/9AT 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 75.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG12A-E3/9AT FAQ
1.How can I place an order for SMCG12A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG12A-E3/9AT 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 SMCG12A-E3/9AT reliable?
The price and inventory of SMCG12A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG12A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG12A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG12A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG12A-E3/9AT?
SMCG12A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG12A-E3/9AT 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 SMCG12A-E3/9AT?
For technical support, including SMCG12A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG12A-E3/9AT requirements.
6.How does Aetrix verify that SMCG12A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG12A-E3/9AT 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 SMCG12A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG12A-E3/9AT?
All SMCG12A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG12A-E3/9AT, 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 SMCG12A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG12A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG12A-E3/9AT Tags
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