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Vishay General Semiconductor - Diodes Division SMCG20A-E3/9AT
- Part No.:
- SMCG20A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG20A-E3/9AT.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,546
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Product details
Overview
SMCG20A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) 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 IPPM - ideal for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial power rails.
For engineers reviewing the SMCG20A-E3/9AT datasheet, SMCG20A-E3/9AT pinout, SMCG20A-E3/9AT application, or SMCG20A-E3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability with 10/1000 µs waveform, low clamping ratio (VC/VBR ≈ 1.46), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, responding within picoseconds to transients induced by inductive load switching or ESD events. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The SMCG20A-E3/9AT is rated for -55 °C to +150 °C operating junction temperature, exhibits 75 °C/W junction-to-ambient thermal resistance (RθJA), and meets J-STD-020 MSL Level 1 with 260 °C lead-free reflow peak - confirming suitability for high-reliability automotive and industrial PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown |
| VBR min/max | 22.2 V / 24.5 V at 1 mA - tight breakdown tolerance ensures predictable turn-on during transients |
| VC @ IPPM | 32.4 V - clamping voltage at 46.3 A peak pulse; limits stress on downstream components during surge |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform; supports high-energy transient suppression |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage at stand-off voltage, minimizing standby power loss |
| TJ max | +150 °C - extended junction temperature rating enables use in under-hood automotive and high-ambient industrial environments |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; compatible with standard SMT reflow without dry-pack requirements |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing package with matte tin-plated leads, UL 94 V-0 molding compound, and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point for unidirectional operation | Connected to protected line; clamps positive transients to ground when anode is grounded |
| Anode | Reference/ground connection point | Typically tied to system ground or low-impedance return path; completes clamping path during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity stress |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR = 1.46) and lower let-through energy during fast transients |
| MSL Level 1, 260 °C peak | Eliminates moisture sensitivity concerns and simplifies manufacturing flow for high-volume SMT lines |
| 1500 W PPPM with 10/1000 µs waveform | Meets ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge immunity requirements for industrial equipment |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive surges above 24.5 V. Use Value: Limits peak voltage to 32.4 V during 1500 W surges, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across signal and ground pins to shunt fast transients before reaching ADC input stages. Use Value: Sub-1 ns response time and 1.0 µA leakage preserve signal integrity and measurement accuracy in 24-bit precision systems. |
| Motor Drive Gate Protection | Telecom Power Supply Input Protection |
Use Scenario: Safeguarding high-side MOSFET gate drivers in BLDC inverters from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: TVS mounted directly at gate-source terminals to clamp dv/dt-induced overshoot during switching transitions. Use Value: 32.4 V clamping prevents gate oxide breakdown in 30 V-rated logic-level MOSFETs during 46.3 A transient currents. | Use Scenario: Front-end protection of AC/DC power supplies in base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on DC bus input, coordinated with MOVs and fuses per IEC 61000-4-5 Class 3. Use Value: 1500 W rating and DO-215AB thermal performance sustain repeated 4 kV/2 kA surges without degradation. |
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) and PPPM (400 W), but lower power rating and SMA package (DO-214AC) | Limited to ≤400 W surges; less suitable for ISO 7637-2 Pulse 5a load dump | Select SMCG20A-E3/9AT when 1500 W surge immunity and AEC-Q101 compliance are required. |
| SMCJ20A-E3/9AT | Same VWM (20 V), higher PPPM (3000 W), but larger SMC (DO-214AB) package and higher RθJA (50 °C/W) | Better power handling but requires more board space and has inferior thermal coupling to PCB | Choose SMCG20A-E3/9AT for space-constrained automotive modules where DO-215AB footprint and MSL Level 1 are critical. |
Compared with SMAJ20A-E3/57T and SMCJ20A-E3/9AT, the SMCG20A-E3/9AT delivers optimal balance of 1500 W surge capability, AEC-Q101 qualification, compact DO-215AB footprint, and industry-leading MSL Level 1 manufacturability - making it the preferred choice for next-generation automotive and industrial edge nodes.
Availability
SMCG20A-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and motor drive gate safeguarding requiring stable component supply and full traceability.
Supply support for SMCG20A-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 diodes, rectifiers, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMCG series was developed specifically for AEC-Q101-compliant transient suppression in space-constrained automotive and industrial applications, combining high-power density with robust thermal performance in the DO-215AB package.
FAQ
What is the clamping voltage of the SMCG20A-E3/9AT at its rated peak pulse current?
The SMCG20A-E3/9AT clamps to 32.4 V at its specified peak pulse current (IPPM) of 46.3 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and reflects actual device behavior during standardized surge testing - critical for verifying voltage margins in protected circuits. The SMCG20A-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCG20A-E3/9AT suitable for automotive applications?
Yes, the SMCG20A-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its DO-215AB package meets MSL Level 1, its junction temperature range extends to +150 °C, and its 1500 W surge rating satisfies ISO 7637-2 Pulse 5a load dump requirements - all confirmed in Vishay's official documentation for SMCG20A-E3/9AT.
What does the "E3/9AT" suffix indicate in SMCG20A-E3/9AT?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "9AT" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This configuration ensures compatibility with high-speed pick-and-place equipment and supports lean manufacturing workflows - a key detail for production planning of SMCG20A-E3/9AT.
How does the SMCG20A-E3/9AT compare to bidirectional TVS diodes like SMCG20CA?
The SMCG20A-E3/9AT is unidirectional and intended for DC circuits where polarity is fixed, offering lower leakage (1.0 µA vs. up to 2.0 µA for SMCG20CA) and optimized clamping for positive transients only. In contrast, SMCG20CA protects AC or floating lines but exhibits higher capacitance and reduced efficiency in pure DC applications - making SMCG20A-E3/9AT the technically superior choice for 12 V/24 V automotive power rails.
What is the thermal resistance of the SMCG20A-E3/9AT, and how does it affect layout design?
The SMCG20A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value mandates minimum pad area and thermal via usage in high-duty-cycle surge scenarios. Layouts must follow Vishay's recommended mounting pad dimensions to ensure SMCG20A-E3/9AT sustains its 1500 W rating without exceeding TJ max of +150 °C.
SMCG20A-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG20A-E3/9AT FAQ
1.How can I place an order for SMCG20A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG20A-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 SMCG20A-E3/9AT reliable?
The price and inventory of SMCG20A-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 SMCG20A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG20A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG20A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG20A-E3/9AT?
SMCG20A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG20A-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 SMCG20A-E3/9AT?
For technical support, including SMCG20A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG20A-E3/9AT requirements.
6.How does Aetrix verify that SMCG20A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG20A-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 SMCG20A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG20A-E3/9AT?
All SMCG20A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG20A-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 SMCG20A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG20A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG20A-E3/9AT Tags
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