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Vishay General Semiconductor - Diodes Division SMCG12A-M3/57T
- Part No.:
- SMCG12A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG12A-M3/57T.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,070
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Product details
Overview
SMCG12A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, featuring a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 75.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in automotive and industrial power electronics.
For engineers reviewing the SMCG12A-M3/57T datasheet, SMCG12A-M3/57T pinout, SMCG12A-M3/57T application, or SMCG12A-M3/57T equivalent, this device is selected for robust overvoltage protection where AEC-Q101 qualification, low incremental surge resistance, and halogen-free RoHS compliance are required in space-constrained PCB layouts.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy away from sensitive downstream circuitry by entering avalanche conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable leakage and long-term reliability under repeated surge stress.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, with maximum junction temperature rated at +150 °C and operation down to –55 °C. It meets J-STD-020 MSL Level 1 and withstands 260 °C lead-free reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail voltage. |
| VBR (min/max) | 13.3 V / 14.7 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 19.9 V at 75.4 A - Clamping voltage limits downstream voltage stress during 1500 W surge events. |
| PPPM | 1500 W (10/1000 µs) - Peak surge power handling capacity validated on 8.0 mm × 8.0 mm copper pads per terminal. |
| ID @ VWM | 5.0 µA max - Low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ Range | –55 °C to +150 °C - Enables deployment in under-hood automotive and industrial environments with wide thermal cycling. |
| Package | SMCG (DO-215AB) - Low-profile SMD outline with gull-wing leads; compatible with automated placement and J-STD-002 soldering. |
Pinout & Package
SMCG12A-M3/57T uses the SMCG (DO-215AB) surface-mount package: gull-wing leads, matte tin-plated terminals, 0.220–0.245 inch body length, 0.115–0.125 inch width, and 0.024–0.040 inch height. Polarity is marked by a cathode band on the anode-side end of the case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line's lower-potential side | Provides low VF path during fault conditions; must be routed to ground or return path for effective clamping. |
| Cathode | Current exit point in forward bias; marked by band; connected to protected line's higher-potential side | Defines clamping polarity-reverse-biased during overvoltage events to conduct surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance-enables use in ADAS and powertrain modules. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets IEC 61249-2-21 and JEDEC J-STD-203 requirements-supports green manufacturing and export compliance without performance trade-offs. |
| Low incremental surge resistance | Enables tighter VC–VBR differential (ΔV = 6.6 V), reducing voltage overshoot across protected ICs during fast transients. |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and pre-baking steps-reduces assembly cost and process complexity. |
| Glass passivated junction | Delivers stable VBR tolerance and low ID drift over time and temperature-critical for long-life industrial deployments. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Guarding |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and alternator-induced spikes up to ±100 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping transients within 1 ns response time. Use Value: Limits voltage seen by MCU and CAN transceivers to ≤19.9 V, preventing latch-up and permanent damage per ISO 7637-2 Pulse 5a. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) in factory-floor pressure/temperature sensors from ESD and cable-coupled noise. IC Role / Device Role / Timing Role: Bidirectional-capable but used unidirectionally across signal-to-ground; absorbs ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal fidelity with <5 µA leakage at 12 V, while clamping fast transients before op-amp input stages saturate. |
| DC-DC Converter Input Stage | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding buck converter inputs in telecom rectifiers exposed to AC line surges and lightning-induced ring waves. IC Role / Device Role / Timing Role: Primary clamping element upstream of input filter capacitors; handles 1500 W 10/1000 µs pulses. Use Value: Prevents overvoltage failure of primary-side FETs and controller ICs by limiting input rail excursion to 19.9 V during surge events. |
Use Scenario: Protecting high-side gate drivers in BLDC inverters from shoot-through-inducing voltage spikes during MOSFET switching. IC Role / Device Role / Timing Role: Placed across driver supply rails (VDD–GND); suppresses ringing and cross-talk induced by dV/dt coupling. Use Value: Ensures gate drive integrity with 75.4 A IPPM capability-absorbs energy from parasitic LC oscillations 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 |
|---|---|---|---|
| SMAJ12A-E3/57T | Same VWM (12 V), lower PPPM (400 W), SMA (DO-214AC) package, non-AEC-Q101 | Limited to consumer/industrial boards without automotive qualification or high-energy surge demands | Select when cost sensitivity outweighs AEC-Q101 and 1500 W surge rating requirements. |
| SMCJ12A-M3/57T | Same VWM (12 V), identical SMCG package and AEC-Q101, but higher VC (21.2 V) and lower IPPM (71.2 A) | Acceptable for less aggressive surge profiles where clamping voltage margin allows higher VC | Choose if board layout already accommodates SMCG footprint and design tolerates ~1.3 V higher clamping voltage. |
Compared with SMAJ12A-E3/57T and SMCJ12A-M3/57T, SMCG12A-M3/57T delivers superior surge robustness (1500 W vs. 400 W or 1500 W with higher VC) and automotive qualification-making it the preferred choice for safety-critical, high-reliability 12 V rail protection where clamping precision and qualification status are non-negotiable.
Availability
SMCG12A-M3/57T is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface guarding, and DC-DC converter input stage surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG12A-M3/57T 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 designs and manufactures discrete semiconductors-including diodes, rectifiers, and TVS devices-with emphasis on reliability, efficiency, and application-specific performance across automotive, industrial, and computing markets.
The SMCG series was developed to deliver AEC-Q101-qualified, high-power surface-mount TVS protection in a compact DO-215AB package-targeting next-generation automotive power distribution and ruggedized industrial control systems.
FAQ
What is the clamping voltage of SMCG12A-M3/57T at its rated peak pulse current?
The SMCG12A-M3/57T has a maximum clamping voltage (VC) of 19.9 V at 75.4 A peak pulse current (IPPM), measured using the standard 10/1000 µs waveform. This value is confirmed in the Vishay datasheet (Document Number: 88457, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG12A-M3/57T maintains this clamping performance across its specified operating temperature range.
Is SMCG12A-M3/57T qualified for automotive applications?
Yes, SMCG12A-M3/57T is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet under Mechanical Data and Ratings sections. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and surge endurance-validating its suitability for under-hood and chassis-mounted automotive electronics. The "M3" suffix further confirms halogen-free, RoHS-compliant construction aligned with automotive material requirements.
What does the "M3" suffix indicate in SMCG12A-M3/57T?
The "M3" suffix in SMCG12A-M3/57T denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-203 and IEC 61249-2-21 standards, with industrial-grade reliability and JESD 201 Class 2 whisker resistance. It distinguishes this variant from "E3" (standard RoHS) and "HM3" (AEC-Q101 + halogen-free). The SMCG12A-M3/57T retains full AEC-Q101 qualification despite the M3 designation, as confirmed in the datasheet's Base P/N table.
How does SMCG12A-M3/57T differ from SMCG12CA-M3/57T?
SMCG12A-M3/57T is unidirectional, with polarity marked by a cathode band and intended for DC rail protection; SMCG12CA-M3/57T is bidirectional, with no polarity marking and symmetric clamping in both directions-used for AC lines or data bus protection. Their VWM (12 V), VBR (13.3–14.7 V), and PPPM (1500 W) match, but SMCG12CA-M3/57T exhibits identical electrical behavior in forward and reverse bias, whereas SMCG12A-M3/57T conducts only in reverse avalanche.
What is the thermal resistance from junction to ambient for SMCG12A-M3/57T?
The typical thermal resistance from junction to ambient (RθJA) for SMCG12A-M3/57T is 75 °C/W, measured on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad layout per terminal. This value supports thermal design calculations for power dissipation up to 6.5 W at TA = 50 °C. The datasheet also specifies RθJL = 15 °C/W (junction to lead), enabling accurate estimation of localized heating under surge conditions.
SMCG12A-M3/57T 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 75.4A
- 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)
SMCG12A-M3/57T FAQ
1.How can I place an order for SMCG12A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG12A-M3/57T 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 SMCG12A-M3/57T reliable?
The price and inventory of SMCG12A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG12A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG12A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG12A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG12A-M3/57T?
SMCG12A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG12A-M3/57T 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 SMCG12A-M3/57T?
For technical support, including SMCG12A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG12A-M3/57T requirements.
6.How does Aetrix verify that SMCG12A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG12A-M3/57T 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 SMCG12A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG12A-M3/57T?
All SMCG12A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG12A-M3/57T, 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 SMCG12A-M3/57T part is unused and in its original packaging.
Return procedure for SMCG12A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG12A-M3/57T Tags
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