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Vishay General Semiconductor - Diodes Division SMCG43CA-E3/9AT
- Part No.:
- SMCG43CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG43CA-E3/9AT.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,590
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Product details
Overview
SMCG43CA-E3/9AT 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 43 V stand-off voltage (VWM), 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O ports, and telecom line protection.
For engineers reviewing the SMCG43CA-E3/9AT datasheet, SMCG43CA-E3/9AT pinout, SMCG43CA-E3/9AT application, or SMCG43CA-E3/9AT equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, and bidirectional symmetry for ESD and lightning surge suppression without polarity constraints.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 47.8 V and 52.8 V at 1 mA test current, and reverse leakage (ID) ≤1.0 µA at VWM = 43 V. Its clamping behavior is validated under standardized 10/1000 µs surge conditions per ANSI/IEEE C62.35, ensuring predictable voltage limiting during transients.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device is glass passivated, RoHS-compliant (E3 suffix), and qualified to MSL level 1 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 47.8 V / 52.8 V - Breakdown occurs within this band at 1 mA; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 69.4 V at 21.6 A - Clamped voltage seen by downstream components during full-rated 10/1000 µs surge; limits stress on ICs/MOSFETs. |
| PPPM | 1500 W - Peak transient energy handling capability; supports high-energy surges from inductive switching or lightning-induced transients. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on sensor or communication lines. |
| TJ max | +150 °C - Enables deployment in under-hood automotive or high-temperature industrial enclosures without derating concerns. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals, compliant with J-STD-002 and JESD 22-B102 solderability standards. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current toward cathode during positive transients; forms symmetrical path with cathode for bidirectional clamping. |
| Cathode | Transient current entry (negative half-cycle) | Conducts surge current toward anode during negative transients; enables identical clamping behavior in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional symmetry | Identical VBR, VC, and IPPM in both directions - eliminates need for orientation-aware layout and simplifies PCB design for AC-coupled or floating lines. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment interfaces requiring long-term field reliability. |
| Glass passivated junction | Enhances moisture resistance and long-term stability of breakdown characteristics under thermal cycling and humidity exposure. |
| MSL Level 1 rating | Supports standard SMT reflow without baking - compatible with high-volume automated assembly using 260 °C peak profile. |
| Low clamping ratio (VC/VWM) | 1.61 - tight ratio ensures minimal overvoltage overshoot relative to working voltage, critical for protecting 3.3 V or 5 V logic rails. |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN FD or LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt surge energy before reaching transceiver IC input pins. Use Value: Maintains signal fidelity during 1500 W transients while meeting AEC-Q101 requirements for 15-year automotive service life. |
Use Scenario: Shielding PLC digital input modules from inductive kickback when switching solenoids, relays, or motor contactors in factory automation systems. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 24 V DC input lines, positioned before optocoupler or Schmitt trigger input stage. Use Value: Limits clamped voltage to 69.4 V, preventing damage to 75 V-rated input protection networks and ensuring >100 kV ESD immunity. |
| Telecom Line Interface | Consumer USB/Display Port ESD Guard |
|
Use Scenario: Safeguarding Ethernet PHY magnetics or xDSL line drivers against lightning-induced surges and AC power cross-talk in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Secondary-level protector located after gas discharge tube (GDT) primary stage, providing fast-response clamping for residual transients. Use Value: Responds in <1 ps with 69.4 V clamping, complementing slower GDTs to meet ITU-T K.20/K.21 immunity requirements. |
Use Scenario: ESD and surge protection for high-speed differential pairs in USB 3.2 Gen 2 or DisplayPort 1.4 interfaces on laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to connector to suppress ±15 kV contact ESD per IEC 61000-4-2 without degrading signal integrity. Use Value: Delivers sub-1 µA leakage and symmetrical clamping to preserve eye diagram margin while passing USB-IF compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA | Same VWM (43 V) and VC (69.4 V), but lower PPPM (400 W); SMA (DO-214AC) package with higher RθJA (110 °C/W). | Limited to lower-energy transients; unsuitable for automotive load dump or industrial 1500 W surge requirements. | Select SMAJ43CA only for cost-sensitive consumer applications where peak surge energy remains below 400 W. |
| SMCJ43CA | Identical electrical specs (VWM, VBR, VC, PPPM) and DO-214AB package; differs in lead finish (matte tin vs. annealed tin) and MSL level (Level 1 vs. Level 2a). | Compatible in most layouts but requires reflow profile adjustment due to MSL Level 2a moisture sensitivity. | Choose SMCJ43CA when existing designs use DO-214AB footprint and moisture-sensitive handling infrastructure is available. |
Compared with SMAJ43CA and SMCJ43CA, the SMCG43CA-E3/9AT offers superior thermal performance (RθJA = 75 °C/W), AEC-Q101 qualification, and MSL Level 1 compatibility - making it the preferred choice for automotive and high-reliability industrial deployments where board space, thermal margin, and qualification rigor are critical.
Availability
SMCG43CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCG43CA-E3/9AT 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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series was developed to deliver high-power, AEC-Q101-qualified transient protection in compact surface-mount packages for next-generation automotive, industrial, and communications systems demanding robust surge immunity.
FAQ
What is the clamping voltage of SMCG43CA-E3/9AT at its rated peak pulse current?
The SMCG43CA-E3/9AT has a maximum clamping voltage (VC) of 69.4 V at 21.6 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream ICs experience controlled overvoltage during surge events. The SMCG43CA-E3/9AT maintains this clamping performance bidirectionally, supporting both positive and negative transients equally.
Is SMCG43CA-E3/9AT suitable for automotive applications?
Yes, the SMCG43CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its construction includes glass passivation, MSL Level 1 reflow compatibility, and guaranteed operation from –55 °C to +150 °C. The SMCG43CA-E3/9AT meets requirements for ECU sensor protection, body control modules, and ADAS interfaces where reliability under thermal cycling and surge stress is mandatory.
How does the bidirectional nature of SMCG43CA-E3/9AT affect PCB layout?
The SMCG43CA-E3/9AT has no polarity marking and performs identically in both directions, eliminating orientation constraints during placement. This allows simplified routing on differential or AC-coupled lines - such as CAN, RS-485, or telecom interfaces - without concern for anode/cathode alignment. The SMCG43CA-E3/9AT's symmetric VBR and VC ensure consistent protection regardless of transient polarity, reducing design validation effort.
What is the thermal resistance of SMCG43CA-E3/9AT, and how does it impact power handling?
The SMCG43CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W. These values enable efficient heat dissipation during repetitive surge events and support sustained operation at TJ = +150 °C. When mounted on the recommended 8.0 mm × 8.0 mm copper pads, the SMCG43CA-E3/9AT sustains its full 1500 W PPPM rating without thermal runaway.
Does SMCG43CA-E3/9AT require special handling or baking prior to reflow?
No - the SMCG43CA-E3/9AT is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and processed using standard SMT reflow profiles with a maximum peak temperature of 260 °C. No baking or dry-pack handling is required, streamlining manufacturing for high-volume automotive and industrial production. The SMCG43CA-E3/9AT's E3 suffix confirms RoHS compliance and industrial-grade reliability without moisture sensitivity concerns.
SMCG43CA-E3/9AT 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 21.6A
- 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)
SMCG43CA-E3/9AT FAQ
1.How can I place an order for SMCG43CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG43CA-E3/9AT 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 SMCG43CA-E3/9AT reliable?
The price and inventory of SMCG43CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG43CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG43CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG43CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG43CA-E3/9AT?
SMCG43CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG43CA-E3/9AT 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 SMCG43CA-E3/9AT?
For technical support, including SMCG43CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG43CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG43CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG43CA-E3/9AT 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 SMCG43CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG43CA-E3/9AT?
All SMCG43CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG43CA-E3/9AT, 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 SMCG43CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG43CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG43CA-E3/9AT Tags
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