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Vishay General Semiconductor - Diodes Division SMCG12CAHE3/57T
- Part No.:
- SMCG12CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG12CAHE3/57T.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,440
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Product details
Overview
SMCG12CAHE3/57T from Vishay General Semiconductor is a bidirectional 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, 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-grade reliability.
For engineers reviewing the SMCG12CAHE3/57T datasheet, SMCG12CAHE3/57T pinout, SMCG12CAHE3/57T application, or SMCG12CAHE3/57T equivalent, this device is selected for high-energy surge suppression in automotive sensor interfaces, industrial I/O lines, and bidirectional signal line protection where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions - enabling single-device protection of AC-coupled or differential signal paths. Its glass-passivated junction ensures stable VBR tolerance and low leakage (≤1.0 µA at VWM), while the DO-215AB package supports automated placement and meets UL 94 V-0 flammability requirements.
The device delivers 1500 W peak pulse power handling under standardized 10/1000 µs waveform conditions, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W. It is rated for continuous operation from –55 °C to +150 °C junction temperature and qualified per AEC-Q101 for automotive under-hood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse stand-off voltage before significant conduction begins |
| VBR min/max | 13.3 V / 14.7 V at IT = 1 mA - tight breakdown window ensures predictable turn-on threshold |
| VC @ IPPM | 19.9 V at 75.4 A - clamping voltage limits transient energy delivered to protected circuitry |
| PPPM | 1500 W (10/1000 µs) - high-energy surge absorption capability for lightning and inductive switching events |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor or communication lines |
| TJ max | +150 °C - extended thermal range supports under-hood automotive and industrial environments |
| Qualification | AEC-Q101 qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded package with matte tin-plated terminals, UL 94 V-0 molding compound, and MSL Level 1 rating (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical bidirectional junction - no polarity marking required |
| Cathode | Terminal K | Other side of symmetrical bidirectional junction - functionally identical to Anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional symmetry | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in AC/differential lines |
| Glass-passivated junction | Stable, repeatable breakdown with low parameter drift over time and temperature |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients - improves clamping effectiveness |
| MSL Level 1 compliance | Supports standard SMT reflow without baking - reduces manufacturing complexity and cost |
| AEC-Q101 qualification | Validated for automotive use including vibration, thermal shock, and humidity exposure |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and engine crankshaft position sensors from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential sensor output lines to clamp ±200 V transients without polarity concern. Use Value: 19.9 V clamping voltage ensures downstream signal conditioning ICs remain within absolute maximum ratings during 1500 W surges. | Use Scenario: Safeguarding CAN transceiver inputs against ESD (IEC 61000-4-2) and burst noise (IEC 61000-4-4) in factory automation nodes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor on CAN_H/CAN_L lines, operating symmetrically during common-mode transients. Use Value: ≤1.0 µA leakage at 12 V VWM prevents bus bias shift; fast response preserves CAN bit timing integrity. |
| Consumer USB-C Port Protection | Telecom DSL Line Interface |
Use Scenario: Guarding USB-C CC and SBU pins against hot-plug ESD and cable-induced surges in portable docking stations. IC Role / Device Role / Timing Role: Compact bidirectional TVS mounted directly at connector to minimize trace inductance and improve clamping efficiency. Use Value: DO-215AB footprint enables high-density layout; AEC-Q101 qualification adds margin for field-reliability in premium consumer gear. | Use Scenario: Protecting ADSL/VDSL line drivers and receivers from lightning-induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Primary protection device placed before hybrid transformer, absorbing >1 kV transients per ITU-T K.20/K.21. Use Value: 1500 W PPPM rating handles multi-kA surge currents; symmetrical clamping avoids DC offset in balanced line pairs. |
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), lower PPPM (400 W), SMA (DO-214AC) package - smaller footprint but reduced surge capacity | Preferred for space-constrained consumer PCBs where 400 W surge immunity suffices | Select SMAJ12CA only if system-level surge testing confirms 400 W is adequate; SMCG12CAHE3/57T provides 3.75× higher energy handling. |
| 1.5KE12CA | Same VWM (12 V), higher PPPM (1500 W), axial-leaded DO-15 package - legacy through-hole form factor | Suitable for prototyping or legacy board upgrades where SMT is not feasible | Choose 1.5KE12CA for manual assembly or repair; SMCG12CAHE3/57T enables automated production and better high-frequency performance. |
Compared with SMAJ12CA and 1.5KE12CA, SMCG12CAHE3/57T delivers identical voltage ratings with superior surge robustness in a modern, AEC-Q101-qualified SMT package - making it optimal for automotive and industrial designs requiring long-term reliability and high-volume manufacturability.
Availability
SMCG12CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom line protection requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SMCG12CAHE3/57T 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-grade qualification.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy bidirectional surge suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 validation and UL recognition.
FAQ
What is the clamping voltage of SMCG12CAHE3/57T and how is it measured?
The clamping voltage (VC) of SMCG12CAHE3/57T is 19.9 V, measured at a peak pulse current (IPPM) of 75.4 A using the standardized 10/1000 µs double-exponential waveform. This value reflects the maximum voltage seen across the device during a high-energy transient, ensuring downstream components remain within safe operating limits. The test is performed per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024.
Is SMCG12CAHE3/57T suitable for automotive applications?
Yes, SMCG12CAHE3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and chassis-mounted systems. Its –55 °C to +150 °C operating junction temperature range, glass-passivated junction, and MSL Level 1 reflow compatibility meet stringent automotive manufacturing and reliability requirements. Vishay documents its qualification status in the mechanical data section of document 88457.
Does SMCG12CAHE3/57T have polarity markings on the package?
No, SMCG12CAHE3/57T does not have polarity markings because it is a bidirectional device - both terminals are functionally identical. Unlike unidirectional variants (e.g., SMCG12A), the CA suffix indicates symmetrical behavior, and the DO-215AB package carries no cathode band or other orientation indicators. This simplifies layout and eliminates risk of incorrect orientation during assembly.
What is the thermal resistance of SMCG12CAHE3/57T and how does it affect PCB layout?
SMCG12CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W, measured on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad per terminal. To maintain safe junction temperatures under sustained power dissipation, designers must adhere to this pad layout - reducing pad size increases thermal impedance and risks exceeding the +150 °C TJ max rating during repeated surges.
How does the SMCG12CAHE3/57T differ from the unidirectional SMCG12A variant?
SMCG12CAHE3/57T is bidirectional with symmetrical VBR, VC, and IPPM in both directions, while SMCG12A is unidirectional with a defined cathode band and forward conduction capability (VF = 3.5 V at 100 A). The CA version lacks polarity marking and supports AC-coupled or differential signal protection; the A version is used where DC blocking or polarity-specific clamping is required. Both share the same DO-215AB package and AEC-Q101 qualification.
SMCG12CAHE3/57T 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG12CAHE3/57T FAQ
1.How can I place an order for SMCG12CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG12CAHE3/57T 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 SMCG12CAHE3/57T reliable?
The price and inventory of SMCG12CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG12CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG12CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG12CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG12CAHE3/57T?
SMCG12CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG12CAHE3/57T 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 SMCG12CAHE3/57T?
For technical support, including SMCG12CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG12CAHE3/57T requirements.
6.How does Aetrix verify that SMCG12CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG12CAHE3/57T 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 SMCG12CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG12CAHE3/57T?
All SMCG12CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG12CAHE3/57T, 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 SMCG12CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCG12CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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