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Vishay General Semiconductor - Diodes Division SMCG12CA-E3/57T
- Part No.:
- SMCG12CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG12CA-E3/57T.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,015
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Product details
Overview
SMCG12CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection on 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 (10/1000 µs), clamping voltage of 19.9 V at 75.4 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCG12CA-E3/57T datasheet, SMCG12CA-E3/57T pinout, SMCG12CA-E3/57T application, or SMCG12CA-E3/57T equivalent, this device is selected for high-energy surge immunity in automotive sensor interfaces, industrial I/O protection, and telecom line conditioning where bidirectional clamping, low clamping ratio, and MSL Level 1 reflow compatibility are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (13.3 V / 14.7 V), ID ≤ 5.0 µA at VWM = 12 V, and VC = 19.9 V under 75.4 A 10/1000 µs surge - yielding a clamping ratio of 1.67. Its glass-passivated junction ensures stable leakage and fast response (< 1 ps), while the DO-215AB package supports automated SMT placement and meets UL 94 V-0 flammability.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. The device is rated for non-repetitive peak forward surge current (IFSM) only in unidirectional variants; as a CA-suffix part, SMCG12CA-E3/57T excludes IFSM but maintains full bidirectional surge capability per IEEE C62.35.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 13.3 V / 14.7 V at IT = 1 mA - guaranteed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 19.9 V at 75.4 A - clamped voltage during 10/1000 µs surge, defining protected circuit stress level |
| PPPM | 1500 W - peak transient energy absorption capacity under standardized waveform |
| ID @ VWM | ≤ 5.0 µA - ultra-low leakage ensuring minimal standby power loss and signal integrity |
| Package | SMCG (DO-215AB) - surface-mount, low-profile, MSL Level 1 compliant, 0.31" × 0.31" copper pad layout optimized |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SMCG12CA-E3/57T uses the SMCG (DO-215AB) package: a symmetrical, bidirectional, two-terminal SMD device with no polarity marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity - no fixed polarity |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device functions identically regardless of orientation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without polarity constraints |
| 1500 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges |
| Clamping ratio 1.67 | VC/VWM = 19.9 V / 12 V ensures low overvoltage stress on downstream ICs like CAN transceivers or ADC inputs |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS sensor modules |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow without preconditioning or special handling |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within picoseconds to transients. Use Value: Prevents latch-up or damage to microcontrollers and transceivers by limiting voltage to ≤19.9 V during 75.4 A surges. |
Use Scenario: Shielding PLC digital input channels from inductive kickback and lightning-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage suppression element at field-side connector interface, shunting surge current to ground. Use Value: Maintains signal integrity under repetitive 1 kV/500 A surges per IEC 61000-4-5, thanks to low incremental surge resistance. |
| Telecom Line Conditioning | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHYs and PoE controllers against induced surges on twisted-pair data lines in outdoor base stations. IC Role / Device Role / Timing Role: Secondary-level TVS in series with common-mode chokes, clamping differential-mode transients. Use Value: Symmetric breakdown ensures equal protection for both line polarities, eliminating need for dual unidirectional devices. |
Use Scenario: Input-stage surge suppression in USB-C PD adapters and smart home power supplies exposed to AC line transients. IC Role / Device Role / Timing Role: First-line transient absorber between bridge rectifier output and bulk capacitor. Use Value: Withstands 1500 W pulses without degradation, extending system lifetime versus lower-power alternatives like SMAJ12CA. |
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 | Lower PPPM (400 W), same VWM (12 V), DO-214AC package, higher RθJA (110 °C/W) | Suitable for lower-energy transients (IEC 61000-4-2 ESD only); not recommended for ISO 7637-2 or IEC 61000-4-5 | Select SMAJ12CA only when board space is constrained and surge energy is < 200 W; SMCG12CA-E3/57T delivers 3.75× higher power handling. |
| 1.5KE12CA | Higher PPPM (1500 W), axial-leaded DO-201AD package, slower thermal response, no AEC-Q101 qualification | Used in legacy through-hole designs; unsuitable for automated SMT production or automotive under-hood environments | Choose 1.5KE12CA only for prototyping or repair of existing through-hole boards; SMCG12CA-E3/57T enables RoHS-compliant, high-volume SMT assembly. |
Compared with SMAJ12CA and 1.5KE12CA, SMCG12CA-E3/57T uniquely combines automotive qualification, surface-mount scalability, and full 1500 W capability in a thermally efficient DO-215AB package - making it the preferred choice for new automotive and industrial designs requiring production-ready surge resilience.
Availability
SMCG12CA-E3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O modules, and telecom infrastructure projects requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SMCG12CA-E3/57T 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series was developed specifically for high-power, surface-mount transient suppression in automotive and industrial environments where AEC-Q101 validation, low clamping ratio, and MSL Level 1 reflow compatibility are mandatory.
FAQ
What is the clamping voltage of SMCG12CA-E3/57T and how is it measured?
The clamping voltage (VC) of SMCG12CA-E3/57T is 19.9 V, measured at a peak pulse current (IPPM) of 75.4 A using the standardized 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value defines the maximum voltage imposed on protected circuitry during surge events and is confirmed in the Vishay datasheet Document Number 88457, page 2. SMCG12CA-E3/57T maintains this clamping performance across its full operating temperature range.
Is SMCG12CA-E3/57T suitable for automotive applications?
Yes, SMCG12CA-E3/57T is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88457, page 1 and page 3). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD, making it approved for use in automotive powertrain, body control, and ADAS systems. The "HE3" and "HM3" suffix variants are also AEC-Q101 qualified, but SMCG12CA-E3/57T itself carries the E3 industrial-grade RoHS-compliant marking with full qualification.
Does SMCG12CA-E3/57T have polarity markings, and how is it mounted?
No, SMCG12CA-E3/57T has no polarity markings because it is a bidirectional TVS diode - both terminals are functionally identical and interchangeable. Per the Vishay mechanical drawing (page 4), it uses the symmetrical DO-215AB (SMCG) package with no cathode band. Mounting requires the standard 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad layout per terminal, and orientation does not affect electrical performance. SMCG12CA-E3/57T is compatible with standard reflow profiles up to 260 °C peak.
What is the leakage current specification for SMCG12CA-E3/57T at its stand-off voltage?
The maximum reverse leakage current (ID) for SMCG12CA-E3/57T is 5.0 µA at the stand-off voltage (VWM) of 12 V and TA = 25 °C, as specified in the Electrical Characteristics table (page 2 of datasheet 88457). This low leakage ensures minimal impact on high-impedance sensor circuits and battery-powered systems. Leakage remains below 50 µA up to 80 % of VWM and increases predictably with temperature, remaining within design-safe limits across the full -55 °C to +150 °C operating range.
How does SMCG12CA-E3/57T compare to unidirectional variants like SMCG12A-E3/57T?
SMCG12CA-E3/57T is bidirectional with symmetric VBR (13.3–14.7 V) and clamping in both directions, while SMCG12A-E3/57T is unidirectional with cathode marking and includes IFSM = 200 A rating. The "CA" suffix indicates bidirectional functionality per Vishay's naming convention (page 1). SMCG12CA-E3/57T is used where AC signals, floating lines, or polarity-agnostic protection is required - e.g., differential buses or transformer-coupled interfaces - whereas SMCG12A-E3/57T suits DC power rails with defined ground reference. Both share identical VWM, PPPM, and package.
SMCG12CA-E3/57T 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-E3/57T FAQ
1.How can I place an order for SMCG12CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG12CA-E3/57T 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-E3/57T reliable?
The price and inventory of SMCG12CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG12CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG12CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG12CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG12CA-E3/57T?
SMCG12CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG12CA-E3/57T 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-E3/57T?
For technical support, including SMCG12CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG12CA-E3/57T requirements.
6.How does Aetrix verify that SMCG12CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG12CA-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG12CA-E3/57T?
All SMCG12CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG12CA-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for SMCG12CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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