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Vishay General Semiconductor - Diodes Division SMCG30AHE3/9AT
- Part No.:
- SMCG30AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG30AHE3/9AT.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,884
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Product details
Overview
SMCG30AHE3/9AT from Vishay General Semiconductor is a unidirectional 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 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 SMCG30AHE3/9AT datasheet, SMCG30AHE3/9AT pinout, SMCG30AHE3/9AT application, or SMCG30AHE3/9AT equivalent, this device serves as a high-reliability, surface-mount TVS for automotive power supply rail protection, sensor interface line clamping, and industrial control I/O port transient suppression where low clamping voltage and fast response are critical.
Technical Context
This unidirectional TVS operates by avalanche breakdown to clamp transient overvoltages above its VWM of 30 V, with guaranteed VBR between 33.3 V and 36.8 V at 1 mA test current. Its 48.4 V VC at 31.0 A ensures robust protection of downstream 3.3 V/5 V/12 V logic and power stages without overstressing components.
Designed for automotive-grade reliability, SMCG30AHE3/9AT meets AEC-Q101 stress testing requirements and features glass-passivated junction, MSL Level 1 moisture sensitivity, and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Thermal resistance is RθJA = 75 °C/W on standard 8.0 mm × 8.0 mm copper pads.
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 1 mA - tight breakdown window ensures predictable turn-on behavior |
| VC @ IPPM | 48.4 V at 31.0 A - clamping voltage limits energy delivered to protected circuit during 10/1000 μs surge |
| PPPM | 1500 W - peak transient power handling capability per standardized waveform |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves system standby current in battery-powered applications |
| TJ max | +150 °C - extended junction temperature rating supports under-hood automotive deployment |
| RθJA | 75 °C/W - thermal performance defined on 8.0 mm × 8.0 mm copper pad layout |
Pinout & Package
Package: SMCG (DO-215AB), surface-mount gull-wing leaded case with cathode band marking. Dimensions: 7.87 mm × 3.17 mm × 2.41 mm (L × W × H); mounting pad layout per Vishay spec requires 8.0 mm × 8.0 mm copper area per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or low-voltage reference; current flows from cathode to anode during clamping |
| Cathode | High-side connection; marked with band | Connected to protected line (e.g., 12 V rail); blocks reverse current until VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use including engine control, body modules, and ADAS sensors |
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity stress |
| MSL Level 1 rating | Enables standard SMT reflow without baking; peak solder temperature up to 260 °C supported |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive ICs |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events in automotive systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to shunt surges before reaching DC/DC converters and microcontrollers. Use Value: Clamps to 48.4 V at 31 A, limiting stress on 50 V-rated input capacitors and enabling compliance with OEM surge immunity requirements. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input cards. IC Role / Device Role / Timing Role: TVS mounted at sensor connector to absorb ESD (IEC 61000-4-2) and inductive switching spikes from nearby solenoids. Use Value: Sub-1 ns response time and 1.0 μA leakage preserve signal integrity and minimize offset error in 16-bit measurement systems. |
| Automotive Lighting Driver Protection | Telecom DC Power Input Protection |
Use Scenario: Shielding LED driver ICs in headlamp modules from reverse-battery and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS on high-side switch output to clamp negative excursions and positive surges simultaneously via external circuit design. Use Value: 1500 W PPPM and +150 °C TJ max support operation in high-ambient under-hood environments with repeated surge exposure. | Use Scenario: Guarding -48 V telecom power feeds against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: TVS deployed across input terminals of DC/DC bricks to limit common-mode overvoltage entering backplane distribution. Use Value: 30 V VWM and 48.4 V VC align with -48 V nominal systems using positive-ground architecture, preventing latch-up in upstream PMICs. |
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 = 110 °C/W | Lower power handling and higher thermal resistance limit use to sub-100 W surge environments | Select when cost-sensitive consumer designs require basic IEC 61000-4-5 Level 2 protection without automotive qualification |
| 1.5SMC30A | Same VWM (30 V), identical PPPM (1500 W), but larger SMC (DO-214AB) package and non-AEC-Q101 rated | Lacks automotive qualification and has different mounting footprint; not suitable for space-constrained PCBs | Choose only for industrial applications where AEC-Q101 is unnecessary and board real estate allows larger SMC outline |
Compared with SMAJ30A-E3/57T and 1.5SMC30A, SMCG30AHE3/9AT uniquely combines AEC-Q101 qualification, DO-215AB compactness, and full 1500 W surge capacity-making it the preferred choice for automotive front-end protection where reliability, size, and performance must coexist.
Availability
SMCG30AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply with traceable sourcing and long lifecycle support.
Supply support for SMCG30AHE3/9AT 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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMCG series was developed specifically for high-power, surface-mount transient suppression in space-constrained automotive and industrial systems-prioritizing low clamping voltage, AEC-Q101 compliance, and robust thermal performance in the DO-215AB footprint.
FAQ
What is the clamping voltage of SMCG30AHE3/9AT and how is it measured?
The clamping voltage (VC) of SMCG30AHE3/9AT is 48.4 V, measured at a peak pulse current (IPPM) of 31.0 A using the standardized 10/1000 μs double-exponential surge waveform. This value reflects the maximum voltage seen across the device during a transient event and is critical for ensuring downstream components remain within their absolute maximum ratings. The test condition matches IEC 61000-4-5 and ISO 7637-2 surge immunity test profiles.
Is SMCG30AHE3/9AT suitable for bidirectional transient protection?
No, SMCG30AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only during positive overvoltage events on the cathode relative to anode. For bidirectional protection, Vishay offers the SMCG30CA variant. Using SMCG30AHE3/9AT in bidirectional applications risks failure during negative transients, as it lacks symmetrical breakdown characteristics.
What does the "HE3" suffix mean in SMCG30AHE3/9AT?
The "HE3" suffix in SMCG30AHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification. "H" indicates AEC-Q101 qualification, "E3" specifies matte tin plating and industrial-grade RoHS compliance per JEDEC standards. The "9AT" denotes packaging in 13-inch diameter tape-and-reel format with 3500 units per reel-optimized for high-volume SMT assembly.
How does SMCG30AHE3/9AT perform under elevated ambient temperatures?
SMCG30AHE3/9AT maintains specified electrical parameters up to +150 °C junction temperature. Derating curves in the datasheet show that at TA = 85 °C, its peak pulse power drops to ~1100 W due to thermal limitations. Designers must ensure adequate copper pad area (8.0 mm × 8.0 mm per terminal) and consider RθJA = 75 °C/W when calculating safe operating margins in thermally dense layouts.
Can SMCG30AHE3/9AT replace SMAJ30A in an existing design?
SMCG30AHE3/9AT is not a drop-in replacement for SMAJ30A due to differences in package (DO-215AB vs. DO-214AC), thermal resistance (75 vs. 110 °C/W), and qualification (AEC-Q101 vs. commercial grade). While both share 30 V VWM and similar VBR, the SMCG30AHE3/9AT requires updated footprint and stencil design. Its superior power handling and automotive qualification justify redesign only when enhanced reliability or regulatory compliance is required.
SMCG30AHE3/9AT 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG30AHE3/9AT FAQ
1.How can I place an order for SMCG30AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG30AHE3/9AT 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 SMCG30AHE3/9AT reliable?
The price and inventory of SMCG30AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG30AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG30AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG30AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG30AHE3/9AT?
SMCG30AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG30AHE3/9AT 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 SMCG30AHE3/9AT?
For technical support, including SMCG30AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG30AHE3/9AT requirements.
6.How does Aetrix verify that SMCG30AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG30AHE3/9AT 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 SMCG30AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG30AHE3/9AT?
All SMCG30AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG30AHE3/9AT, 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 SMCG30AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG30AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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