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Vishay General Semiconductor - Diodes Division SMCG20AHE3/9AT
- Part No.:
- SMCG20AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG20AHE3/9AT.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,014
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Product details
Overview
SMCG20AHE3/9AT 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 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 46.3 A peak pulse current (IPPM), and clamps to ≤32.4 V at rated surge. It is AEC-Q101 qualified and used in automotive power line and sensor interface protection.
For engineers reviewing the SMCG20AHE3/9AT datasheet, SMCG20AHE3/9AT pinout, SMCG20AHE3/9AT application, or SMCG20AHE3/9AT 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
The SMCG20AHE3/9AT operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable, repeatable clamping under transient stress. Its 10/1000 µs waveform response enables suppression of fast ESD and load-dump events while maintaining low incremental surge resistance and fast response time.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it achieves 75 °C/W junction-to-ambient thermal resistance and supports continuous operation from –55 °C to +150 °C. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line or supply rail standoff level. |
| VBR (min/max) | 22.2 V / 24.5 V at IT = 1 mA - Confirmed breakdown range ensures reliable triggering across process variation and temperature. |
| VC @ IPPM | ≤32.4 V at 46.3 A - Clamping voltage limits downstream IC stress during 10/1000 µs transients, critical for 24 V automotive systems. |
| PPPM | 1500 W - Peak pulse power rating determines survivability against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits like CAN or LIN bus nodes. |
| TJ max. | +150 °C - Enables placement near high-temperature components (e.g., power MOSFETs, DC/DC converters) without derating. |
| Package | SMCG (DO-215AB) - Low-profile, gull-wing SMD package optimized for automated placement and meets UL 94 V-0 flammability. |
Pinout & Package
SMCG20AHE3/9AT uses the SMCG (DO-215AB) package: a 2-terminal surface-mount device with gull-wing leads. Polarity is marked by a cathode band; the banded end is the cathode (anode is unmarked). Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated thermal and surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line (e.g., 24 V rail); conducts surge current to ground when V > VBR. |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensors under extended temperature and lifetime stress. |
| Glass passivated junction | Ensures stable VBR and low leakage over time and temperature, eliminating risk of moisture-induced parameter drift. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning, compatible with industrial and automotive PCB assembly lines. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V or 5 V logic interfaces downstream. |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for enclosed automotive modules and industrial enclosures per safety standards. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against ISO 7637-2 load dump pulses up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and DC/DC input stage. Use Value: Limits transient voltage to ≤32.4 V, preventing damage to upstream regulators and ensuring uninterrupted microcontroller operation. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to inductive switching noise. IC Role / Device Role / Timing Role: Standoff-mode protector on signal line, conducting only during >22.2 V transients. Use Value: Maintains <1.0 µA leakage at 20 V, preserving loop accuracy while suppressing ±1 kV EFT bursts per IEC 61000-4-4. |
| Automotive CAN Transceiver Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Secondary-level surge protection on CAN_H/CAN_L lines downstream of common-mode chokes in vehicle infotainment gateways. IC Role / Device Role / Timing Role: Fast-response clamp limiting differential transients to <35 V, complementing primary TVS array. Use Value: Achieves sub-nanosecond response and ≤32.4 V clamping, meeting ISO 11898-2 EMC immunity requirements. |
Use Scenario: Input-stage transient suppression in universal AC/DC adapters handling 100–240 VAC mains, protecting bridge rectifier and bulk capacitor. IC Role / Device Role / Timing Role: Standoff-rated TVS across DC bus post-rectification, triggered only during surge events. Use Value: Withstands 1500 W peak pulses and maintains 20 V nominal hold-off, enabling compact design without sacrificial fusing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/57T | Same VWM (20 V), lower PPPM (400 W), SMA (DO-214AC) package, MSL Level 1 but not AEC-Q101 qualified. | Limited to commercial/industrial use; unsuitable for automotive under-hood deployment due to qualification gap. | Select when cost sensitivity outweighs automotive qualification and surge energy requirements are ≤400 W. |
| SMCJ20AHE3/9AT | Same VWM (20 V), identical AEC-Q101 qualification and HE3 suffix, but higher PPPM (1500 W) and larger SMC (DO-214AB) package. | Offers same protection level with greater thermal mass; requires larger PCB footprint and different pad layout. | Choose when board space allows SMC package and higher surge margin is needed beyond SMCG's 1500 W rating. |
Compared with SMAJ20A-E3/57T, SMCG20AHE3/9AT delivers automotive-grade reliability and triple the surge power handling; versus SMCJ20AHE3/9AT, it provides identical protection in a 30 % smaller footprint, enabling denser automotive module layouts.
Availability
SMCG20AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, and consumer power adapter designs requiring stable component supply, AEC-Q101 compliance, and high-energy transient suppression.
Supply support for SMCG20AHE3/9AT 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 application-specific performance.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, low-profile surface-mount transient suppression in automotive and industrial environments where space, qualification, and surge robustness are critical.
FAQ
What is the clamping voltage of SMCG20AHE3/9AT at its rated peak pulse current?
The SMCG20AHE3/9AT clamps to a maximum of 32.4 V when subjected to its rated 46.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Vishay's datasheet 88457 and defines the upper voltage limit imposed on protected circuitry during surge events. Maintaining clamping below 33 V ensures compatibility with 24 V automotive systems and downstream 3.3 V/5 V logic interfaces.
Is SMCG20AHE3/9AT suitable for bidirectional transient protection?
No, SMCG20AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix (as opposed to "CA" for bidirectional variants like SMCG20CA). It conducts only in reverse bias above VBR and must be oriented with the cathode band toward the protected line. For bidirectional protection-such as AC signal lines or differential buses-SMCG20CA or equivalent bidirectional devices are required instead of SMCG20AHE3/9AT.
What does the "HE3" suffix mean in SMCG20AHE3/9AT?
The "HE3" suffix in SMCG20AHE3/9AT denotes RoHS-compliant construction with matte tin-plated leads and full AEC-Q101 qualification for automotive applications. It distinguishes this variant from industrial-grade "E3" (RoHS, no AEC-Q101) and halogen-free "HM3" versions. The HE3 marking confirms compliance with automotive reliability testing including temperature cycling, humidity bias, and surge endurance per AEC-Q101 Rev D.
What is the recommended PCB pad layout for SMCG20AHE3/9AT to achieve rated 1500 W performance?
To achieve the full 1500 W peak pulse power rating, SMCG20AHE3/9AT must be mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay's datasheet 88457. Smaller pads reduce thermal dissipation and surge current capability. The pad layout must also maintain minimum solder mask defined (SMD) spacing and avoid thermal reliefs on high-current paths to ensure mechanical and thermal integrity during repetitive surge events.
How does SMCG20AHE3/9AT compare to SMAJ20A in terms of surge handling and qualification?
SMCG20AHE3/9AT delivers 1500 W peak pulse power-3.75× higher than SMAJ20A's 400 W-and is AEC-Q101 qualified, whereas SMAJ20A is rated only for industrial/commercial use. Both share 20 V VWM and similar VBR, but SMCG20AHE3/9AT's DO-215AB package offers lower profile and better thermal resistance (75 °C/W vs. ~100 °C/W for SMA). These differences make SMCG20AHE3/9AT the preferred choice for automotive under-hood applications demanding higher energy absorption and qualification rigor.
SMCG20AHE3/9AT 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 46.3A
- 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)
SMCG20AHE3/9AT FAQ
1.How can I place an order for SMCG20AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG20AHE3/9AT 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 SMCG20AHE3/9AT reliable?
The price and inventory of SMCG20AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG20AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG20AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG20AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG20AHE3/9AT?
SMCG20AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG20AHE3/9AT 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 SMCG20AHE3/9AT?
For technical support, including SMCG20AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG20AHE3/9AT requirements.
6.How does Aetrix verify that SMCG20AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG20AHE3/9AT 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 SMCG20AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG20AHE3/9AT?
All SMCG20AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG20AHE3/9AT, 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 SMCG20AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG20AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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