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Vishay General Semiconductor - Diodes Division SMCG30A-E3/9AT
- Part No.:
- SMCG30A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG30A-E3/9AT.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,312
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Product details
Overview
SMCG30A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, featuring a 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V clamping voltage (VC) at 31.0 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with a 10/1000 µs waveform. It is AEC-Q101 qualified and used for automotive-level ESD and surge protection on power rails and signal lines.
For engineers reviewing the SMCG30A-E3/9AT datasheet, SMCG30A-E3/9AT pinout, SMCG30A-E3/9AT application, or SMCG30A-E3/9AT equivalent, this device is selected for robust transient suppression in automotive power electronics, industrial sensor interfaces, and DC-DC converter input stages where stable clamping performance and high surge immunity are required.
Technical Context
The SMCG30A-E3/9AT operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response to transients (<1 ns) and low incremental surge resistance. Its clamping behavior is defined under standardized 10/1000 µs waveform testing per ANSI/IEEE C62.35, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C) and supports automated placement. Polarity is marked by a cathode band; no marking applies to bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 33.3 V / 36.8 V at IT = 1 mA - ensures reliable avalanche initiation within tight tolerance |
| VC @ IPPM | 48.4 V at 31.0 A - defines worst-case voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 1500 W - peak transient energy handling capability under standard waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves system efficiency in standby and low-power modes |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| Package | SMCG (DO-215AB) - low-profile SMD outline with matte tin-plated leads, J-STD-002 solderable |
Pinout & Package
SMCG30A-E3/9AT uses the SMCG (DO-215AB) surface-mount package: 2-terminal, gull-wing leaded, 7.87 mm × 9.64 mm footprint, 2.41 mm height, with cathode indicated by a band on the anode-side end cap. Leads are matte tin-plated and compliant with JESD 22-B102 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or low-side reference in unidirectional TVS configuration | Provides return path for surge current during clamping; must be routed to lowest-impedance ground plane |
| Cathode | Current exit point in forward bias; marked with band; connects to protected line (e.g., 30 V rail or signal) | Defines polarity-sensitive connection - reverse-biased during normal operation, avalanches when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per AEC test plan |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift |
| MSL Level 1 rating | Enables single-reflow assembly without baking; compatible with standard SMT lines up to 260 °C peak |
| Low incremental surge resistance | Minimizes VC rise under high di/dt surges, improving protection margin for downstream ICs |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive modules |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V/30 V battery-fed ECUs and body control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients above 30 V. Use Value: Clamps 1500 W surges to ≤48.4 V, preventing damage to LDOs, microcontrollers, and CAN transceivers downstream. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation systems from ESD and inductive switching noise. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt fast transients before they reach precision ADC front-ends. Use Value: Sub-1 ns response and 1.0 µA leakage preserve signal integrity and measurement accuracy in 24-bit sensor systems. |
| DC-DC Converter Input Stage | Telecom Power Supply Surge Protection |
Use Scenario: Safeguarding buck converter inputs in PoE-powered equipment exposed to lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping device on 48 V input rail, coordinated with upstream fuse and common-mode chokes. Use Value: Withstands 31.0 A peak pulse current and maintains clamping below 48.4 V, ensuring converter IC survival during IEC 61000-4-5 2 kV tests. | Use Scenario: Front-end protection of AC/DC power supplies in base station remote radio units subjected to repeated lightning surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on rectified DC bus to suppress differential-mode surges before bulk capacitor stage. Use Value: 1500 W PPPM rating and +150 °C TJ max allow sustained operation in sealed outdoor enclosures with minimal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T | Same VWM (30 V), lower PPPM (400 W), SMA (DO-214AC) package, RθJA = 100 °C/W | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost or board space is prioritized over automotive qualification and high-surge capability |
| SMCJ30A-E3/9AT | Same VWM (30 V), identical PPPM (1500 W), but larger SMC (DO-214AB) package and higher RθJA (85 °C/W) | Requires more PCB area; less suitable for dense automotive modules | Choose only if legacy SMC footprint compatibility is mandatory and thermal margin allows |
Compared with SMAJ30A-E3/57T and SMCJ30A-E3/9AT, the SMCG30A-E3/9AT delivers equal surge rating in a smaller DO-215AB outline with superior thermal resistance (RθJA = 75 °C/W) and full AEC-Q101 compliance-making it optimal for next-gen automotive and space-constrained industrial designs.
Availability
SMCG30A-E3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMCG30A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade validation.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including under-hood automotive, industrial motor drives, and outdoor telecom infrastructure.
FAQ
What is the clamping voltage of SMCG30A-E3/9AT under a 10/1000 µs surge?
The SMCG30A-E3/9AT has a maximum clamping voltage (VC) of 48.4 V at 31.0 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events. The SMCG30A-E3/9AT maintains this clamping performance across its specified operating temperature range.
Is SMCG30A-E3/9AT AEC-Q101 qualified?
Yes, SMCG30A-E3/9AT is AEC-Q101 qualified. The "HE3" and "HM3" base part number variants explicitly denote AEC-Q101 qualification, and the SMCG30A-E3/9AT shares the same die, construction, and qualification data as those variants per Vishay's ordering documentation and family datasheet. This qualification covers stress tests including HTGB, H3TRB, and temperature cycling.
What does the "E3/9AT" suffix indicate in SMCG30A-E3/9AT?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads; "9AT" specifies packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3500 units. This differs from "57T", which uses 7-inch reels with 850-unit quantities. Both comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Can SMCG30A-E3/9AT be used in bidirectional configurations?
No - SMCG30A-E3/9AT is a unidirectional TVS diode, identified by the "A" (not "CA") suffix. Bidirectional variants use the "CA" suffix (e.g., SMCG30CA). Using SMCG30A-E3/9AT in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What is the thermal resistance of SMCG30A-E3/9AT, and how does it affect layout?
The SMCG30A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures under repeated surges, PCB layout must replicate this pad size and use internal ground planes. Reducing pad area increases RθJA significantly, risking thermal runaway during high-duty-cycle transients.
SMCG30A-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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)
SMCG30A-E3/9AT FAQ
1.How can I place an order for SMCG30A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG30A-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 SMCG30A-E3/9AT reliable?
The price and inventory of SMCG30A-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 SMCG30A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG30A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG30A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG30A-E3/9AT?
SMCG30A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG30A-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 SMCG30A-E3/9AT?
For technical support, including SMCG30A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG30A-E3/9AT requirements.
6.How does Aetrix verify that SMCG30A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG30A-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 SMCG30A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG30A-E3/9AT?
All SMCG30A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG30A-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 SMCG30A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG30A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG30A-E3/9AT Tags
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