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Vishay General Semiconductor - Diodes Division SMCG43CA-E3/57T
- Part No.:
- SMCG43CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG43CA-E3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,639
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Product details
Overview
SMCG43CA-E3/57T from Vishay General Semiconductor is a bidirectional 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, 1500 W peak pulse power (10/1000 µs), 21.6 A peak pulse current (IPPM), and clamps to ≤69.4 V under surge conditions - deployed on signal lines and power rails in automotive sensor units and industrial control interfaces.
For engineers reviewing the SMCG43CA-E3/57T datasheet, SMCG43CA-E3/57T pinout, SMCG43CA-E3/57T application, or SMCG43CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, DO-215AB thermal performance (RθJA = 75 °C/W), and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCG43CA-E3/57T operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges per IEC 61000-4-2/4-5.
Designed for operation across -55 °C to +150 °C junction temperature range, it delivers 6.5 W steady-state power dissipation at TA = 50 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is qualified to AEC-Q101 and recognized under UL 497B (QVGQ2) for telecom and automotive protector applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 3.3 V/5 V/12 V rail protection. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - Confirmed bidirectional breakdown window; ensures reliable triggering across manufacturing tolerance and temperature. |
| VC @ IPPM | ≤69.4 V at 21.6 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to safe levels during transient events. |
| PPPM | 1500 W - Peak pulse power handling capacity; supports high-energy transients common in automotive load-dump and inductive switching. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage at stand-off voltage; prevents signal integrity degradation and battery drain in always-on circuits. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive environments and thermally constrained industrial enclosures. |
| RθJA | 75 °C/W - Thermal resistance with 0.31″ × 0.31″ copper pads; informs PCB layout requirements for sustained power dissipation. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals, UL 94 V-0 molding compound, and no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; either terminal serves as anode or cathode depending on transient polarity - enables simplified PCB routing without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensors, and infotainment interfaces. |
| 1500 W peak pulse power | Withstands high-energy transients from ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V and 5 V logic-level interfaces in microcontrollers and transceivers. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT processes without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current across humidity, bias, and thermal stress conditions. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay and chassis modules exposed to load dump and alternator ripple. IC Role / Device Role: Bidirectional TVS placed at connector entry point to clamp ±100 V transients before reaching ADC input or signal conditioner IC. Use Value: Maintains sensor accuracy and longevity by limiting transient-induced latch-up or gate oxide damage in front-end op-amps and ASICs. |
Use Scenario: Safeguarding CANH/CANL differential pair against ESD and coupled surges in factory automation PLCs and motor drives. IC Role / Device Role: Paired SMCG43CA-E3/57T devices (one per line) provide symmetrical clamping referenced to common-mode ground. Use Value: Preserves CAN physical layer integrity with <69.4 V clamping while supporting >1 Mbps data rates due to low junction capacitance (~200 pF at 0 V). |
| Telecom Power Supply Input | Consumer USB-C Port Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 12 V/24 V DC inputs of PoE-powered switches and base station RF modules. IC Role / Device Role: Standoff-rated TVS absorbing induced surges from nearby AC mains or lightning coupling into DC distribution traces. Use Value: Prevents catastrophic failure of DC-DC controllers and PMICs by limiting input rail excursions to ≤69.4 V during 10/1000 µs surges. |
Use Scenario: Bidirectional protection of VBUS and CC lines in USB-C receptacles subjected to hot-plug ESD and cable-bend-induced transients. IC Role / Device Role: Low-leakage (≤1 µA) TVS maintaining signal integrity while meeting IEC 61000-4-2 Level 4 (±15 kV air) requirements. Use Value: Enables compact layout with no polarity constraints and avoids false disconnect detection caused by asymmetric clamping. |
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 PPPM (400 W), but lower surge rating (400 W vs. 1500 W); SMA (DO-214AC) package with higher RθJA (110 °C/W). | Limited to lower-energy transients (e.g., board-level ESD only); unsuitable for automotive load-dump or industrial surge standards. | Select SMAJ43CA only when space constraints prohibit DO-215AB or when system-level surge testing does not exceed IEC 61000-4-2. |
| SMCJ43CA | Identical VWM (43 V), PPPM (1500 W), and DO-214AB package; differs in thermal resistance (RθJA = 12 °C/W on large copper) and JEDEC qualification (not AEC-Q101). | Valid for industrial and telecom surge protection but lacks automotive qualification evidence; may require additional validation for vehicle programs. | Choose SMCJ43CA for cost-sensitive industrial designs where AEC-Q101 is not mandated and PCB layout allows larger thermal pads. |
Compared with SMAJ43CA and SMCJ43CA, the SMCG43CA-E3/57T uniquely combines AEC-Q101 qualification, DO-215AB's optimized thermal profile (75 °C/W on standard pads), and guaranteed 1500 W surge capability - making it the preferred choice for automotive Tier-1 suppliers requiring zero-layout-change migration from legacy SMCG platforms.
Availability
SMCG43CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom power supply inputs, and consumer USB-C port protection requiring stable component supply and full traceability.
Supply support for SMCG43CA-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, efficiency, and application-specific optimization.
The SMCG series targets high-surge, automotive-qualified transient suppression in compact surface-mount formats - engineered to replace through-hole TVS arrays and simplify compliance with ISO 16750 and AEC-Q101 requirements.
FAQ
What is the clamping voltage of the SMCG43CA-E3/57T under maximum surge conditions?
The SMCG43CA-E3/57T clamps to a maximum of 69.4 V when subjected to its rated 21.6 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88457, Rev. 09-Jan-2024) and reflects worst-case performance across temperature and unit variation - critical for validating downstream IC voltage tolerances in the SMCG43CA-E3/57T design-in process.
Is the SMCG43CA-E3/57T suitable for automotive applications?
Yes, the SMCG43CA-E3/57T is explicitly AEC-Q101 qualified and listed in Vishay's automotive-grade product portfolio. It meets requirements for temperature cycling, high-temperature reverse bias, and ESD robustness - validated for use in engine control units, body electronics, and ADAS sensor modules. The SMCG43CA-E3/57T also carries UL 497B recognition (QVGQ2), supporting compliance with automotive system-level surge standards like ISO 7637-2.
Does the SMCG43CA-E3/57T have polarity markings on the package?
No, the SMCG43CA-E3/57T is a bidirectional TVS diode and carries no polarity marking on the SMCG (DO-215AB) package. Its symmetrical construction means either terminal functions as anode or cathode depending on transient polarity - eliminating orientation constraints during automated placement and simplifying PCB layout. This behavior is confirmed in the Vishay datasheet section "Polarity: for unidirectional types the band denotes cathode end, no marking on bidirectional types" for SMCG43CA-E3/57T.
What is the maximum operating temperature for the SMCG43CA-E3/57T?
The SMCG43CA-E3/57T has a specified junction temperature range of -55 °C to +150 °C, with thermal resistance RθJA = 75 °C/W measured on 0.31″ × 0.31″ copper pads. At ambient temperatures up to +105 °C (common in automotive under-hood environments), the SMCG43CA-E3/57T maintains safe operation provided power dissipation remains within derated limits per Figure 2 in the Vishay datasheet - ensuring reliability in demanding thermal conditions.
How does the SMCG43CA-E3/57T compare to unidirectional variants like SMCG43A-E3/57T?
The SMCG43CA-E3/57T is bidirectional with symmetrical clamping in both polarities and no cathode band, whereas SMCG43A-E3/57T is unidirectional with a marked cathode and forward conduction capability (VF = 3.5 V at 100 A). For AC-coupled or floating signal lines - such as CAN bus or audio interfaces - the SMCG43CA-E3/57T provides inherently balanced protection without external circuitry, unlike SMCG43A-E3/57T which requires careful polarity alignment and cannot protect negative transients without additional components.
SMCG43CA-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:
- -
- 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-E3/57T FAQ
1.How can I place an order for SMCG43CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG43CA-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 SMCG43CA-E3/57T reliable?
The price and inventory of SMCG43CA-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 SMCG43CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG43CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG43CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG43CA-E3/57T?
SMCG43CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG43CA-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 SMCG43CA-E3/57T?
For technical support, including SMCG43CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG43CA-E3/57T requirements.
6.How does Aetrix verify that SMCG43CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG43CA-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 SMCG43CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG43CA-E3/57T?
All SMCG43CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG43CA-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 SMCG43CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG43CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG43CA-E3/57T Tags
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