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Vishay General Semiconductor - Diodes Division SMCG43A-E3/9AT
- Part No.:
- SMCG43A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG43A-E3/9AT.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,480
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Product details
Overview
SMCG43A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor signal lines, industrial I/O interfaces, and DC power rail protection.
For engineers reviewing the SMCG43A-E3/9AT datasheet, SMCG43A-E3/9AT pinout, SMCG43A-E3/9AT application, or SMCG43A-E3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, low incremental surge resistance, glass-passivated junction, MSL Level 1 rating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking. Its silicon junction is glass passivated to ensure stable leakage performance and long-term reliability under repetitive surge stress. The device responds within picoseconds to transients, limiting voltage across protected circuit nodes before downstream ICs or MOSFETs experience damage.
Thermal design relies on its RθJA of 75 °C/W and RθJL of 15 °C/W, requiring proper PCB copper pad layout per Vishay's recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) thermal pads. It sustains operation from –55 °C to +150 °C junction temperature and meets UL 497B recognition (QVGQ2) for telecom and industrial protectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - Ensures consistent breakdown onset across production lots; tight tolerance supports predictable protection threshold. |
| VC @ IPPM | 69.4 V at 21.6 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPPM | 1500 W - Peak transient energy handling capability; enables protection against high-energy ESD, lightning-induced surges, and inductive switching spikes. |
| ID @ VWM | 1.0 µA - Ultra-low reverse leakage at rated stand-off voltage; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and thermally constrained industrial enclosures without derating. |
| Package | SMCG (DO-215AB) - Low-profile, gull-wing SMT package optimized for automated assembly and high thermal conductivity via exposed leads. |
Pinout & Package
SMCG43A-E3/9AT uses the SMCG (DO-215AB) surface-mount package: a low-profile, gull-wing leaded case with molded compound meeting UL 94 V-0 flammability rating. Terminals are matte tin plated and solderable per J-STD-002 and JESD 22-B102. Polarity is marked by a cathode band on the unidirectional device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or lower-potential node in unidirectional clamp configuration; enables low-VF path during surge. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., CAN_H, sensor output); defines clamping direction and ensures correct orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for engine control, ADAS, and body electronics. |
| Glass passivated junction | Enhances long-term stability of leakage current and breakdown voltage under humidity, thermal stress, and aging - critical for field-deployed systems. |
| MSL Level 1 (260 °C peak) | Enables standard reflow soldering without moisture sensitivity concerns - eliminates bake requirements and streamlines manufacturing. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving clamping precision and system immunity. |
| UL 497B recognized (QVGQ2) | Confirms compliance for telecom and industrial protector applications - simplifies safety certification for end equipment. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting analog outputs of pressure, temperature, and position sensors in engine control modules subject to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ground to clamp negative-going transients and limit positive excursions to ≤69.4 V. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADC inputs while maintaining <1.0 µA leakage at 43 V bias. |
Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs exposed to motor drive noise and relay coil kickback. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used in pair) across differential lines to suppress common-mode surges up to 1500 W. Use Value: Maintains signal integrity during 10/1000 µs transients without degrading data rate or introducing jitter due to low capacitance and fast response. |
| DC Power Rail Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Guarding 48 V DC input rails in PoE-powered switches and industrial cameras against inductive switching spikes and hot-swap transients. IC Role / Device Role / Timing Role: Primary clamping device mounted at connector entry point, shunting surge current to chassis ground before reaching DC-DC converters. Use Value: Withstands 200 A non-repetitive forward surge (IFSM) and delivers 1500 W peak power dissipation - eliminating need for series fusing in many designs. |
Use Scenario: Protecting USB 2.0 D+/D− lines in smart home hubs against human-body-model (HBM) ESD events up to ±15 kV. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with each data line to clamp ESD pulses below IC damage thresholds. Use Value: Achieves sub-nanosecond response and <1.0 µA leakage at 43 V, ensuring no signal attenuation or timing skew in full-speed USB signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/57T | Same VWM (43 V) and VC (69.4 V), but SMA (DO-214AC) package; 10% higher RθJA (82.5 °C/W) and lower IPPM (20.0 A). | Limited to lower-power or less thermally demanding layouts; not AEC-Q101 qualified. | Select when cost or legacy footprint compatibility outweighs automotive qualification and thermal performance. |
| SMCJ43A-E3/9AT | Same SMCG package and AEC-Q101 rating, but higher PPPM (3000 W); VWM identical, VC slightly higher (70.1 V at 43.2 A). | Better suited for high-energy surge environments (e.g., 12 V battery line protection), with trade-off in board space and cost. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and requires >1500 W headroom. |
Compared with SMAJ43A-E3/57T, SMCG43A-E3/9AT delivers superior thermal performance and automotive qualification; versus SMCJ43A-E3/9AT, it offers tighter clamping at lower surge energy - making it optimal for space-constrained, AEC-Q101–mandated signal-line protection where 1500 W suffices.
Availability
SMCG43A-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and DC power rail surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG43A-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, MOSFETs, and protection devices engineered for reliability, efficiency, and manufacturability.
The SMCG series was developed specifically for high-reliability surface-mount transient suppression in automotive and industrial applications - emphasizing AEC-Q101 compliance, low-profile packaging, and repeatable clamping performance under thermal and electrical stress.
FAQ
What is the clamping voltage of SMCG43A-E3/9AT at its rated peak pulse current?
The SMCG43A-E3/9AT has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 21.6 A, measured using the standardized 10/1000 µs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is confirmed in Vishay's official datasheet revision 09-Jan-2024, page 2. The SMCG43A-E3/9AT maintains this clamping performance across its specified operating temperature range.
Is SMCG43A-E3/9AT qualified for automotive applications?
Yes, SMCG43A-E3/9AT is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number: 88457, revision 09-Jan-2024, page 1). This qualification covers stress tests including temperature cycling, highly accelerated life testing (HALT), and surge endurance - validating its suitability for under-hood and chassis-mounted automotive electronics. The "HE3" and "HM3" suffix variants denote AEC-Q101 versions, but the E3/9AT variant shares the same die and qualification status per Vishay's ordering information note (page 3).
What does the "E3/9AT" suffix indicate in SMCG43A-E3/9AT?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads; "9AT" specifies the packaging format: 13-inch diameter plastic tape and reel containing 3500 units. This differs from "57T", which uses a 7-inch reel with 850 units. Both formats share identical electrical and thermal specifications. The SMCG43A-E3/9AT is not halogen-free (that requires "M3" suffix) nor AEC-Q101–branded ("HE3" or "HM3"), though the underlying device is qualified per datasheet notes.
Can SMCG43A-E3/9AT be used in bidirectional protection circuits?
No - SMCG43A-E3/9AT is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix and cathode-band marking. For bidirectional operation, Vishay specifies part numbers ending in "CA", such as SMCG43CA. Using SMCG43A-E3/9AT in a bidirectional configuration would only protect against transients in one polarity, leaving the circuit vulnerable to reverse surges. Always match the device type (A vs. CA) to the required protection topology.
What is the thermal resistance from junction to ambient for SMCG43A-E3/9AT?
The SMCG43A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet (page 3, Thermal Characteristics table). This value assumes still air conditions and is critical for calculating maximum power dissipation at elevated ambient temperatures. Its lower junction-to-lead resistance (RθJL = 15 °C/W) further supports efficient heat transfer into the PCB.
SMCG43A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCG43A-E3/9AT FAQ
1.How can I place an order for SMCG43A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG43A-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 SMCG43A-E3/9AT reliable?
The price and inventory of SMCG43A-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 SMCG43A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG43A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG43A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG43A-E3/9AT?
SMCG43A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG43A-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 SMCG43A-E3/9AT?
For technical support, including SMCG43A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG43A-E3/9AT requirements.
6.How does Aetrix verify that SMCG43A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG43A-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 SMCG43A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG43A-E3/9AT?
All SMCG43A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG43A-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 SMCG43A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG43A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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