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Vishay General Semiconductor - Diodes Division SMCG12A-E3/57T
- Part No.:
- SMCG12A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG12A-E3/57T.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,220
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Product details
Overview
SMCG12A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V maximum clamping voltage (VC) at 75.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with a 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCG12A-E3/57T datasheet, SMCG12A-E3/57T pinout, SMCG12A-E3/57T application, or SMCG12A-E3/57T equivalent, key selection criteria include verified clamping performance under 75.4 A surge, AEC-Q101 qualification for automotive use, DO-215AB mechanical compatibility, and thermal resistance (RθJA = 75 °C/W) under standard 8.0 mm × 8.0 mm copper pad layout.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified breakdown range. Its glass-passivated junction ensures stable leakage (<5 µA at VWM) and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes.
Designed for surface-mount automation, it uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The cathode band marking identifies polarity, and its DO-215AB case provides UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - guaranteed avalanche onset range under standardized test conditions |
| VC @ IPPM | 19.9 V at 75.4 A - clamped voltage during full 1500 W transient, defining worst-case stress on protected IC |
| PPPM | 1500 W - peak surge power handling capability with 10/1000 µs waveform, critical for IEC 61000-4-5 compliance |
| ID @ VWM | ≤5 µA - low leakage ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max. | +150 °C - junction temperature limit supporting operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on 8.0 mm × 8.0 mm copper pads, guiding PCB thermal design |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, gull-wing surface-mount case with 0.220–0.245 inch body length, 0.115–0.125 inch width, and 0.024–0.040 inch height; RoHS-compliant matte tin terminals; cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded side is opposite) | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal (marked with band) | Connected to protected line (e.g., 12 V supply or CAN-H); conducts surge current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR tolerance, low leakage drift over time, and immunity to humidity-induced degradation |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients, preserving clamping effectiveness during fast-rising surges |
| MSL Level 1 rating | Enables standard SMT reflow without baking; supports 260 °C peak temperature without delamination or parametric shift |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for safety-critical automotive and industrial enclosures |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND, clamping surges above ~13.3 V before they reach downstream regulators or logic ICs. Use Value: Limits peak voltage to ≤19.9 V at 75.4 A, preventing latch-up or permanent damage to 16-bit MCUs rated for 16 V absolute max. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop drivers) in factory-floor pressure sensors exposed to relay coil kickback. IC Role / Device Role / Timing Role: TVS mounted across output terminals to shunt inductive energy into ground, maintaining signal fidelity during switching events. Use Value: Sub-20 V clamping ensures op-amp output stages remain within safe SOA, avoiding output stage saturation or thermal runaway. |
| Consumer Device USB Port ESD Guard | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-level ESD protection on VBUS line of USB 2.0 ports in set-top boxes, supplementing internal TPD circuitry. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp absorbing ±8 kV contact discharge per IEC 61000-4-2 before reaching USB transceiver IC. Use Value: 19.9 V clamping prevents VBUS overvoltage from exceeding USB spec limits (5.5 V), protecting PHY and controller silicon. | Use Scenario: Primary surge protection on twisted-pair DSL line interface cards in central office equipment subjected to induced lightning surges. IC Role / Device Role / Timing Role: TVS installed differential-mode across tip/ring, conducting multi-kA transients to chassis ground via coordinated MOV network. Use Value: 1500 W PPPM rating sustains multiple 10/1000 µs surges without degradation, meeting GR-1089-CORE Level 3 requirements. |
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) and VC (20.1 V), but lower PPPM (400 W) and smaller SMA (DO-214AC) package | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump | Select only if space-constrained and surge energy is ≤400 W; verify RθJA (105 °C/W) does not exceed thermal budget |
| SMCJ12A-E3/57T | Same VWM (12 V) and higher PPPM (1500 W), but larger SMC (DO-214AB) package and higher RθJA (50 °C/W) | Requires more PCB area; better thermal dissipation but incompatible with DO-215AB footprint | Choose when board layout allows SMC footprint and higher thermal margin is needed; not drop-in compatible |
Compared with SMAJ12A-E3/57T and SMCJ12A-E3/57T, SMCG12A-E3/57T delivers identical 12 V standoff and 1500 W surge rating in the smallest possible DO-215AB form factor, balancing high-energy clamping with automated placement compatibility and AEC-Q101 validation for harsh environments.
Availability
SMCG12A-E3/57T is available at Aetrix Electronics and suitable for automotive ECU designs, industrial sensor modules, and telecom line card deployments requiring stable component supply, AEC-Q101 compliance, and repeatable 1500 W transient suppression performance.
Supply support for SMCG12A-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive qualification.
The SMCG series is engineered specifically for high-power, surface-mount transient suppression in space-constrained automotive and industrial systems - prioritizing low-profile packaging, AEC-Q101 validation, and consistent clamping under repetitive surge stress.
FAQ
What is the breakdown voltage range of the SMCG12A-E3/57T?
The SMCG12A-E3/57T has a guaranteed breakdown voltage (VBR) range of 13.3 V to 14.7 V at a test current of 1 mA, measured per ANSI/IEEE C62.35 standards. This range ensures reliable avalanche initiation just above its 12 V stand-off voltage, and is confirmed in Vishay's official datasheet revision 09-Jan-2024 (Document Number: 88457). The SMCG12A-E3/57T maintains this specification across its qualified operating temperature range.
Is the SMCG12A-E3/57T suitable for automotive applications?
Yes, the SMCG12A-E3/57T is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD per the AEC-Q101 standard. Its DO-215AB package, 150 °C max junction temperature, and validated performance under load dump conditions make it appropriate for under-hood and body-control module applications. The SMCG12A-E3/57T is explicitly listed in Vishay's automotive-grade product documentation.
What is the maximum clamping voltage of the SMCG12A-E3/57T and at what current is it specified?
The SMCG12A-E3/57T has a maximum clamping voltage (VC) of 19.9 V, specified at a peak pulse current (IPPM) of 75.4 A using the industry-standard 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated 1500 W transient event. The SMCG12A-E3/57T achieves this clamping performance while maintaining low incremental surge resistance, as confirmed in the Electrical Characteristics table of its datasheet.
Does the SMCG12A-E3/57T have polarity marking, and how is it oriented on the PCB?
Yes, the SMCG12A-E3/57T is unidirectional and features a visible cathode band on one end of the DO-215AB package. During PCB layout, the banded end must be connected to the line being protected (e.g., 12 V rail or signal trace), while the anode connects to ground. This orientation ensures proper avalanche conduction during reverse overvoltage events. The SMCG12A-E3/57T's polarity marking is consistent with JEDEC DO-215AB mechanical drawings and Vishay's ordering information.
What is the thermal resistance of the SMCG12A-E3/57T, and how is it measured?
The SMCG12A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured on a standard 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad layout per terminal, as defined in Vishay's datasheet. This value assumes no additional heatsinking and guides thermal design for sustained power dissipation up to 6.5 W. The SMCG12A-E3/57T's RθJA is validated under controlled lab conditions and applies directly to typical SMT assembly practices used in automotive and industrial manufacturing.
SMCG12A-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:
- 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-E3/57T FAQ
1.How can I place an order for SMCG12A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG12A-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 SMCG12A-E3/57T reliable?
The price and inventory of SMCG12A-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 SMCG12A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG12A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG12A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG12A-E3/57T?
SMCG12A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG12A-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 SMCG12A-E3/57T?
For technical support, including SMCG12A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG12A-E3/57T requirements.
6.How does Aetrix verify that SMCG12A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG12A-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 SMCG12A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG12A-E3/57T?
All SMCG12A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG12A-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 SMCG12A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG12A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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