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Vishay General Semiconductor - Diodes Division SMCG15A-M3/9AT
- Part No.:
- SMCG15A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG15A-M3/9AT.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,908
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Product details
Overview
SMCG15A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, with a 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 1 mA, 24.4 V clamping voltage (VC) at 61.5 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the SMCG15A-M3/9AT datasheet, SMCG15A-M3/9AT pinout, SMCG15A-M3/9AT application, or SMCG15A-M3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 75 °C/W), and bidirectional variant compatibility for robust overvoltage protection design.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, triggering avalanche conduction when reverse voltage exceeds VBR to limit transient energy. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM).
Designed for 10/1000 μs surge waveforms, it delivers 61.5 A peak pulse current with 24.4 V clamping voltage under standardized test conditions, and supports 200 A non-repetitive forward surge (IFSM) - critical for handling inrush and load-dump events in 12 V/24 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 16.7 V / 18.5 V at 1 mA - defines reliable avalanche initiation window for predictable turn-on |
| VC @ IPPM | 24.4 V at 61.5 A - clamped voltage during 10/1000 μs surge, limiting stress on downstream components |
| PPPM | 1500 W - peak transient power absorption capability under standard waveform |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on recommended 8 mm × 8 mm copper pads |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals, UL 94 V-0 molding compound, MSL Level 1 (260 °C reflow peak), and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (reverse-biased mode) | Connected to protected line or ground return path depending on placement; enables unidirectional clamping from cathode to anode |
| Cathode | Current exit terminal (reverse-biased mode) | Marked with band; connected to higher-potential rail (e.g., 12 V supply) to clamp transients toward ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance |
| Halogen-free & RoHS compliant (M3 suffix) | Meets environmental compliance mandates for industrial and automotive OEM supply chains without compromising surge robustness |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision for sensitive 3.3 V/5 V logic interfaces |
Applications
| Automotive Load-Dump Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver inputs from alternator load-dump spikes (ISO 7637-2 Pulse 5a) in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground, clamping transients within 1 ns response time. Use Value: Limits clamped voltage to 24.4 V, preventing damage to 3.3 V or 5 V interface ICs while sustaining 1500 W surge energy per event. | Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in factory automation PLC modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected clamping device on 0–10 V or 4–20 mA output paths, absorbing inductive kickback before reaching ADC front-end. Use Value: Maintains signal integrity by holding clamped voltage below 25 V, avoiding ADC saturation and ensuring measurement continuity during 61.5 A surge events. |
| DC-DC Converter Input Protection | Motor Drive Gate Driver Protection |
Use Scenario: Shielding buck converter input stages from battery line transients in e-bike or industrial power supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VIN rail upstream of controller IC, triggered by >16.7 V excursions. Use Value: Absorbs up to 1500 W of transient energy without degradation, preserving converter uptime and eliminating need for redundant filtering. | Use Scenario: Preventing gate oxide rupture in N-channel MOSFET drivers caused by Miller-induced voltage spikes during high-di/dt switching. IC Role / Device Role / Timing Role: Clamp placed between gate driver output and power MOSFET gate, referenced to source, suppressing overshoot beyond 24.4 V. Use Value: Enables safe operation at 100 kHz+ switching frequencies by limiting gate voltage excursion, reducing risk of false turn-on and shoot-through. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T | Same VWM (15 V), lower PPPM (400 W), SMA (DO-214AC) package, RθJA = 110 °C/W | Limited to lower-energy transients; not AEC-Q101 qualified | Select for cost-sensitive consumer or industrial designs where 400 W surge capacity suffices and automotive qualification is unnecessary |
| SMCG15CA-M3/9AT | Bidirectional variant; identical VWM (15 V), VBR (16.7–18.5 V), VC (24.4 V), and PPPM (1500 W); same package and AEC-Q101 rating | Supports AC-coupled or floating signal lines (e.g., RS-485, USB D+/D−) requiring symmetrical clamping | Choose when protecting differential or bipolar signals where polarity reversal must be suppressed in both directions |
Compared with SMAJ15A-E3/57T, SMCG15A-M3/9AT delivers 3.75× higher surge power handling and automotive qualification; versus SMCG15CA-M3/9AT, it provides optimized unidirectional clamping for DC rails, simplifying layout and reducing parasitic capacitance on single-ended lines.
Availability
SMCG15A-M3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and DC-DC converter input protection requiring stable component supply across production lifecycles.
Supply support for SMCG15A-M3/9AT 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, efficiency, and application-specific optimization.
The SMCG series was engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where AEC-Q101 compliance, 1500 W surge capability, and DO-215AB mechanical robustness are mandatory.
FAQ
What is the clamping voltage of SMCG15A-M3/9AT and how is it measured?
The SMCG15A-M3/9AT has a maximum clamping voltage (VC) of 24.4 V, measured at 61.5 A peak pulse current using the standardized 10/1000 μs double-exponential surge waveform. This value reflects the actual voltage seen by protected circuitry during worst-case transient events and is guaranteed per Vishay's datasheet revision 09-Jan-2024. The SMCG15A-M3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG15A-M3/9AT suitable for automotive applications?
Yes, SMCG15A-M3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS subsystems. Its construction features glass-passivated junctions, halogen-free RoHS compliance (M3 suffix), and thermal stability up to +150 °C junction temperature - all validated per automotive reliability test standards. The SMCG15A-M3/9AT meets ISO 7637-2 Pulse 5a load-dump requirements when applied with proper PCB layout.
How does the M3 suffix affect SMCG15A-M3/9AT compliance and performance?
The M3 suffix indicates halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, matching the industrial-grade reliability of the base SMCG series while meeting stringent environmental regulations. It does not alter electrical parameters - VWM, VBR, VC, and PPPM remain identical to E3-suffix variants. The SMCG15A-M3/9AT retains full AEC-Q101 qualification and 75 °C/W thermal resistance, making it drop-in compatible for automotive and industrial designs requiring green material compliance.
What is the recommended PCB pad layout for optimal thermal and surge performance of SMCG15A-M3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCG15A-M3/9AT to achieve the published RθJA of 75 °C/W and sustain 1500 W peak pulse power. Thermal vias under pads are recommended for high-reliability automotive layouts. The SMCG15A-M3/9AT datasheet Figure 2 confirms derating curves based on this layout, and deviation reduces surge current handling and thermal margin.
Can SMCG15A-M3/9AT be used in bidirectional signal protection applications?
No - SMCG15A-M3/9AT is a unidirectional TVS diode, designed for clamping transients on DC rails with defined polarity (cathode to higher potential). For bidirectional protection (e.g., RS-485, audio lines), the functionally matched SMCG15CA-M3/9AT should be used instead. That variant shares identical VWM, VBR, VC, and PPPM ratings but clamps symmetrically in both directions. Using SMCG15A-M3/9AT on AC or floating signals risks failure due to reverse conduction during negative transients.
SMCG15A-M3/9AT 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 61.5A
- 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)
SMCG15A-M3/9AT FAQ
1.How can I place an order for SMCG15A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG15A-M3/9AT 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 SMCG15A-M3/9AT reliable?
The price and inventory of SMCG15A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG15A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG15A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG15A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG15A-M3/9AT?
SMCG15A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG15A-M3/9AT 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 SMCG15A-M3/9AT?
For technical support, including SMCG15A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG15A-M3/9AT requirements.
6.How does Aetrix verify that SMCG15A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG15A-M3/9AT 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 SMCG15A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG15A-M3/9AT?
All SMCG15A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG15A-M3/9AT, 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 SMCG15A-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG15A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG15A-M3/9AT Tags
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