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Vishay General Semiconductor - Diodes Division SMCG12CA-M3/57T
- Part No.:
- SMCG12CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG12CA-M3/57T.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,297
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Product details
Overview
SMCG12CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for robust overvoltage protection of signal and power lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), clamping voltage of 19.9 V at 75.4 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG12CA-M3/57T datasheet, SMCG12CA-M3/57T pinout, SMCG12CA-M3/57T application, or SMCG12CA-M3/57T equivalent, this device is selected for high-surge-capability, low-clamping, halogen-free TVS protection in automotive sensor interfaces, industrial I/O ports, and telecom line receivers where bidirectional surge immunity and MSL Level 1 reflow compatibility are required.
Technical Context
The SMCG12CA-M3/57T operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection against positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for 10/1000 µs waveform compliance, it delivers 75.4 A peak pulse current (IPPM) while maintaining a low 19.9 V clamping voltage (VC), minimizing stress on downstream ICs. Thermal resistance is specified at RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = +150 °C with appropriate PCB copper pad layout (8.0 mm × 8.0 mm per terminal).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range. |
| VBR (min/max) | 13.3 V / 14.7 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during surges. |
| VC @ IPPM | 19.9 V at 75.4 A - Clamped voltage under 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients like ISO 7637-2 Pulse 5a. |
| ID @ VWM | 5.0 µA - Reverse leakage at stand-off voltage; low value minimizes quiescent power loss and signal distortion. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMCG (DO-215AB) - Low-profile SMD outline with gull-wing leads; compatible with automated placement and J-STD-020 reflow (260 °C peak). |
Pinout & Package
SMCG12CA-M3/57T uses the SMCG (DO-215AB) surface-mount package: a bidirectional device with no polarity marking; both terminals are electrically symmetric and interchangeable. The package features matte tin-plated gull-wing leads, meets UL 94 V-0, and is rated MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction between pins. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device functions identically regardless of orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines (e.g., RS-485, CAN, sensor bridges) without polarity constraints. |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets environmental compliance mandates for industrial and automotive OEMs; supports lead-free assembly and green procurement policies. |
| Low incremental surge resistance | Contributes to tight VC–IPPM relationship (19.9 V @ 75.4 A), reducing let-through energy during fast transients like ESD or inductive switching. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake-out requirements and simplifying manufacturing. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine bays exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across sensor output and ground to shunt transients before they reach ADC input or signal conditioner. Use Value: Maintains signal integrity by limiting voltage excursions to ≤19.9 V during 75.4 A surges, preventing latch-up or damage to 3.3 V/5 V analog front-ends. |
Use Scenario: Safeguarding 24 V digital input channels on PLC modules subjected to field-wiring induced surges and contact bounce. IC Role / Device Role / Timing Role: Standoff-mode protector installed between input terminal and controller GPIO, absorbing repetitive 1 kV/42 Ω transients. Use Value: Withstands ≥1000 surges at rated PPPM while holding leakage below 5 µA at 12 V, ensuring stable logic-level recognition and long-term reliability. |
| Telecom Line Receiver Protection | RS-485 Transceiver Interface |
Use Scenario: Shielding low-voltage DSL or POTS line interface ICs from lightning-induced surges entering via twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary protection device mounted at connector entry point, preceding secondary filtering and common-mode chokes. Use Value: Fast avalanche response (<1 ns) and symmetrical clamping ensure balanced differential protection without skew or DC offset introduction. |
Use Scenario: Securing half-duplex RS-485 bus nodes (e.g., Modbus RTU) in factory automation networks prone to ground potential differences and cable ESD events. IC Role / Device Role / Timing Role: Bidirectional TVS connected between A/B differential lines and ground to suppress common-mode and differential-mode transients. Use Value: 1500 W PPPM rating and DO-215AB thermal performance enable sustained operation in unventilated enclosures with ambient temperatures up to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | Same VWM (12 V) and bidirectional configuration, but lower PPPM (400 W) and higher VC (23.2 V at 17.3 A); SMA package (DO-214AC), larger footprint. | Less suitable for high-energy automotive pulses (e.g., ISO 7637-2 Pulse 5a); better for cost-sensitive consumer electronics with lower surge exposure. | Select SMAJ12CA only when board space allows larger SMA and system-level surge testing confirms 400 W sufficiency. |
| 1.5KE12CA | Higher PPPM (1500 W) and same VWM, but through-hole DO-15 package; slower thermal response and incompatible with SMT assembly. | Applicable only in legacy through-hole designs or prototyping; not viable for automated production or compact PCB layouts. | Choose 1.5KE12CA only for hand-soldered evaluation or repair scenarios where rework flexibility outweighs production efficiency. |
Compared with SMAJ12CA and 1.5KE12CA, SMCG12CA-M3/57T uniquely combines AEC-Q101 qualification, halogen-free construction, MSL Level 1 reflow compatibility, and DO-215AB's optimized thermal performance-making it the preferred choice for volume automotive and industrial SMT production requiring zero compromise on surge robustness or process compliance.
Availability
SMCG12CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line receivers, and RS-485 communication ports requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG12CA-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 is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMCG series was developed specifically for surface-mount transient suppression in space-constrained, high-surge environments-emphasizing AEC-Q101 compliance, low-profile packaging, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of SMCG12CA-M3/57T and how is it measured?
The SMCG12CA-M3/57T has a maximum clamping voltage (VC) of 19.9 V, measured at a peak pulse current (IPPM) of 75.4 A using the standardized 10/1000 µs double-exponential waveform per ANSI/IEEE C62.35. This value reflects the actual voltage seen by protected circuitry during worst-case surge events and is guaranteed across the full operating temperature range.
Is SMCG12CA-M3/57T suitable for automotive applications?
Yes, SMCG12CA-M3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its bidirectional architecture, 1500 W peak pulse power, +150 °C junction rating, and MSL Level 1 reflow compatibility make it appropriate for engine control units, body control modules, and ADAS sensor interfaces subject to ISO 7637-2 and ISO 16750-2 stress conditions.
What does the "M3" suffix indicate in SMCG12CA-M3/57T?
The "M3" suffix denotes halogen-free, RoHS-compliant construction meeting JEDEC JESD201 Class 2 whisker resistance requirements. It also signifies industrial-grade qualification-distinct from "HE3" or "HM3", which add AEC-Q101 certification. For SMCG12CA-M3/57T, AEC-Q101 is confirmed in the datasheet, making M3 here synonymous with automotive-grade halogen-free compliance.
How does SMCG12CA-M3/57T differ from unidirectional SMCG12A-M3/57T?
SMCG12CA-M3/57T is bidirectional with symmetrical VBR (13.3–14.7 V) and clamping in both directions, while SMCG12A-M3/57T is unidirectional with cathode marking and forward conduction capability. The "CA" version replaces two unidirectional devices in AC or floating-line applications, simplifying layout and eliminating polarity concerns-critical for RS-485, CAN, or bridge sensor outputs.
What PCB layout guidance applies to SMCG12CA-M3/57T for optimal thermal and surge performance?
For rated PPPM and thermal performance, Vishay specifies mounting SMCG12CA-M3/57T on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, with internal layer copper pours connected via multiple vias. Minimizing trace inductance between the device and protected node is essential-short, wide traces reduce let-through voltage during fast transients, preserving the 19.9 V clamping guarantee of SMCG12CA-M3/57T.
SMCG12CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCG12CA-M3/57T FAQ
1.How can I place an order for SMCG12CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG12CA-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 SMCG12CA-M3/57T reliable?
The price and inventory of SMCG12CA-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 SMCG12CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG12CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG12CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG12CA-M3/57T?
SMCG12CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG12CA-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 SMCG12CA-M3/57T?
For technical support, including SMCG12CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG12CA-M3/57T requirements.
6.How does Aetrix verify that SMCG12CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG12CA-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 SMCG12CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG12CA-M3/57T?
All SMCG12CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG12CA-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 SMCG12CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCG12CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG12CA-M3/57T Tags
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