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Vishay General Semiconductor - Diodes Division SMCG12CAHE3/9AT
- Part No.:
- SMCG12CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG12CAHE3/9AT.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,949
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Product details
Overview
SMCG12CAHE3/9AT 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 SMCG12CAHE3/9AT datasheet, SMCG12CAHE3/9AT pinout, SMCG12CAHE3/9AT application, or SMCG12CAHE3/9AT equivalent, this device is selected for high-energy surge suppression in automotive sensor interfaces, industrial I/O lines, and bidirectional signal path protection where low clamping ratio, fast response (<1 ns), 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 at IPPM = 75.4 A under 10/1000 µs waveform. Its glass-passivated junction ensures stable leakage and low incremental surge resistance.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C. The device meets JESD201 Class 2 whisker resistance and UL 497B recognition (QVGQ2, E136766) for safety-critical protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line. |
| VBR (min/max) | 13.3 V / 14.7 V at IT = 1 mA - Tight breakdown tolerance ensures predictable turn-on threshold across temperature and unit variation. |
| VC @ IPPM | 19.9 V at 75.4 A - Clamping voltage during 10/1000 µs surge; limits downstream IC stress to sub-20 V level. |
| PPPM | 1500 W - Peak surge energy handling capacity; supports high-energy transients like ISO 7637-2 Pulse 5a. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and thermally constrained PCB layouts. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control, ADAS sensors, and body electronics. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing package with 8.0 mm × 8.0 mm copper pad footprint per terminal for optimal thermal dissipation. |
Pinout & Package
SMCG12CAHE3/9AT uses the SMCG (DO-215AB) surface-mount package: gull-wing leads, matte tin-plated terminals solderable per J-STD-002/JESD22-B102, no polarity marking (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional current path | No polarity designation; either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC or differential lines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock - required for Tier-1 ECUs and ADAS modules. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning - eliminates moisture sensitivity handling overhead in SMT lines. |
| Low clamping ratio (VC/VBR ≈ 1.4) | 19.9 V / 14.7 V = 1.35 - minimizes overvoltage overshoot during surge, protecting 12 V rail-tolerant ICs such as CAN transceivers and LIN drivers. |
| Glass-passivated junction | Stable leakage (<5 µA at 12 V), low dynamic resistance, and repeatable breakdown behavior across life cycle and temperature extremes. |
| UL 497B recognized (QVGQ2) | Approved for telecom and industrial signal line protection per Underwriters Laboratories - simplifies system-level safety certification. |
Applications
| Automotive Sensor Interface | Industrial Analog I/O Protection |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor outputs against load dump and inductive switching transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±100 V surges before reaching signal conditioning amplifier and microcontroller ADC input. Use Value: Prevents latch-up or permanent damage to precision op-amps and 12-bit ADCs by limiting transient voltage to ≤19.9 V while maintaining <5 µA leakage at 12 V nominal. |
Use Scenario: Safeguarding 4–20 mA current loop transmitter outputs against field wiring faults and ESD events in factory automation PLC modules. IC Role / Device Role / Timing Role: Placed across loop terminals to shunt surge energy away from analog front-end and isolation barrier components. Use Value: Withstands repeated 1500 W surges without degradation, ensuring >10-year field reliability in harsh industrial environments with minimal maintenance. |
| Automotive Body Control Module (BCM) | Telecom Line Interface |
Use Scenario: Protecting LIN bus transceiver pins from battery reverse connection, jump-start spikes, and electrostatic discharge in door module ECUs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp directly at transceiver I/O pins to preserve signal integrity up to 20 kbps. Use Value: Fast <1 ns response time and symmetrical clamping ensure no data corruption during transient events, meeting LIN Physical Layer conformance requirements. |
Use Scenario: Shielding RS-485 transceiver inputs in base station remote radio units exposed to lightning-induced surges on long outdoor cable runs. IC Role / Device Role / Timing Role: Primary protection device mounted at PCB edge connector, coordinated with secondary GDT or polymer PTC for multi-stage defense. Use Value: UL 497B recognition and 1500 W rating enable compliance with IEC 61000-4-5 Level 4 (4 kV) testing without derating or parallel devices. |
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-E3/57T | Same VWM (12 V), lower PPPM (400 W), SMA (DO-214AC) package, RθJA = 110 °C/W | Lower surge rating and higher thermal resistance limit use to low-energy consumer or non-automotive applications | Select when cost sensitivity outweighs automotive qualification and 1500 W surge margin is unnecessary. |
| SMCJ12CAHE3/9AT | Same VWM (12 V), same PPPM (1500 W), but SMC (DO-214AB) package with larger footprint and higher IFSM (200 A) | Higher mounting area requirement and different pad layout; suitable where board space allows and higher forward surge immunity is needed | Choose when legacy SMC footprint compatibility or enhanced unidirectional surge margin (IFSM) is prioritized over DO-215AB's low-profile advantage. |
Compared with SMAJ12CA-E3/57T, SMCG12CAHE3/9AT delivers 3.75× higher surge power and AEC-Q101 validation for automotive use; versus SMCJ12CAHE3/9AT, it offers identical surge capability in a 30% smaller footprint and lower profile - critical for space-constrained ADAS camera modules and compact BCMs.
Availability
SMCG12CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O safeguarding, and telecom line interface applications requiring stable component supply, AEC-Q101 compliance, and high-reliability surge immunity.
Supply support for SMCG12CAHE3/9AT 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 high-reliability, automotive-qualified, and industry-standard solutions.
The SMCG series was developed specifically for high-power, low-profile transient suppression in automotive and industrial environments where AEC-Q101 compliance, MSL Level 1 reflow capability, and symmetrical bidirectional clamping are mandatory design requirements.
FAQ
What is the clamping voltage of SMCG12CAHE3/9AT at its rated peak pulse current?
The SMCG12CAHE3/9AT has a maximum clamping voltage (VC) of 19.9 V at its rated peak pulse current (IPPM) of 75.4 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe voltage limits during surge events. The SMCG12CAHE3/9AT maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMCG12CAHE3/9AT suitable for automotive applications?
Yes, SMCG12CAHE3/9AT is AEC-Q101 qualified and explicitly intended for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its qualification covers temperature cycling, humidity testing, and mechanical shock per automotive reliability standards. The SMCG12CAHE3/9AT also carries UL 497B recognition (file E136766), further validating its suitability for safety-critical vehicle subsystems.
What does the "HE3" suffix indicate in SMCG12CAHE3/9AT?
The "HE3" suffix in SMCG12CAHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting JESD201 Class 2 whisker resistance. It distinguishes this variant from industrial-grade "E3" parts and halogen-free "HM3" versions. The SMCG12CAHE3/9AT is therefore certified for both environmental compliance and automotive-grade reliability in a single package.
How does SMCG12CAHE3/9AT differ from unidirectional SMCG12A variants?
SMCG12CAHE3/9AT is bidirectional with symmetrical breakdown and clamping characteristics in both polarities, whereas SMCG12A is unidirectional with cathode band marking and only clamps positive transients. The SMCG12CAHE3/9AT supports AC-coupled or differential signal lines (e.g., LIN, RS-485) without polarity concerns, while SMCG12A requires correct orientation and is used for DC rail protection like 12 V supply lines.
What is the thermal resistance of SMCG12CAHE3/9AT, and how does it affect PCB layout?
The SMCG12CAHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To achieve rated power dissipation, the PCB must provide adequate copper area and thermal vias - undersized pads increase junction temperature and reduce surge endurance. The SMCG12CAHE3/9AT's low RθJL enables effective heat transfer through leads into internal ground planes.
SMCG12CAHE3/9AT 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)
SMCG12CAHE3/9AT FAQ
1.How can I place an order for SMCG12CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG12CAHE3/9AT 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 SMCG12CAHE3/9AT reliable?
The price and inventory of SMCG12CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG12CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG12CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG12CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG12CAHE3/9AT?
SMCG12CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG12CAHE3/9AT 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 SMCG12CAHE3/9AT?
For technical support, including SMCG12CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG12CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG12CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG12CAHE3/9AT 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 SMCG12CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG12CAHE3/9AT?
All SMCG12CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG12CAHE3/9AT, 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 SMCG12CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG12CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG12CAHE3/9AT Tags
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