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Vishay General Semiconductor - Diodes Division SMCG40CA-E3/57T
- Part No.:
- SMCG40CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG40CA-E3/57T.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,750
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Product details
Overview
SMCG40CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection on signal and power lines. It features a 40 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 64.5 V at 23.3 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG40CA-E3/57T datasheet, SMCG40CA-E3/57T pinout, SMCG40CA-E3/57T application, or SMCG40CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.61), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCG40CA-E3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical breakdown behavior in both polarities. Its 10/1000 μs waveform response enables suppression of lightning-induced transients and inductive switching spikes up to 23.3 A peak pulse current.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The device meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current, ensuring predictable turn-on |
| VC @ IPPM | 64.5 V at 23.3 A - Clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 1500 W - Peak transient energy handling capability under standardized surge waveform |
| ID @ VWM | 1.0 μA - Ultra-low leakage ensures minimal standby power loss and signal integrity |
| TJ max. | +150 °C - Enables use in under-hood automotive and industrial environments without derating |
| MSL Level | Level 1 (260 °C peak reflow) - Supports standard lead-free SMT assembly without baking |
Pinout & Package
Package: SMCG (DO-215AB) - Low-profile surface-mount case with matte tin-plated leads, UL 94 V-0 molding compound, and no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | One end of symmetrical avalanche junction; interchangeable with cathode in bidirectional mode |
| Cathode | Current exit terminal in forward bias | Other end of symmetrical avalanche junction; functionally identical to anode for SMCG40CA-E3/57T |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR min/max (44.4 V / 49.1 V) and VC (64.5 V) in both directions - eliminates need for polarity-aware layout |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces - supports PPAP documentation |
| Low incremental surge resistance | Enables tight clamping (VC/VWM = 1.61) - reduces voltage overshoot on protected ICs and MOSFETs |
| Glass-passivated junction | Enhances long-term reliability and stability under repeated surge events - critical for industrial field-deployed equipment |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pairs or supply rails to clamp transients before they reach sensitive analog front-ends. Use Value: Maintains signal fidelity during 1500 W surges while meeting AEC-Q101 requirements - avoids system resets or sensor drift in harsh environments. | Use Scenario: Safeguarding digital input/output terminals of programmable logic controllers exposed to relay coil back-EMF and ESD in factory automation systems. IC Role / Device Role / Timing Role: Standoff-mode protector on 24 V DC I/O lines, absorbing repetitive 10/1000 μs transients up to 23.3 A without degradation. Use Value: Extends mean time between failures (MTBF) by preventing gate oxide damage in interface drivers and optocouplers. |
| Telecom Line Interface | Consumer Power Adapter Protection |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair cabling in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary-level TVS on line-side ports, coordinated with secondary GDT or MOV stages to meet ITU-T K.21 basic protection level. Use Value: Delivers 64.5 V clamping at 23.3 A - keeps induced voltages below Ethernet IC absolute maximum ratings during Category B surges. | Use Scenario: Secondary-side overvoltage protection in AC/DC adapters for smart home devices, guarding USB-C PD controllers and microcontrollers. IC Role / Device Role / Timing Role: Fast-response clamp on 5–20 V DC output rails, activated before internal LDOs or USB switch ICs experience overstress. Use Value: 1.0 μA leakage at 40 V VWM prevents battery drain in always-on standby modes - critical for Energy Star compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40CA | Same VWM (40 V) and PPPM (400 W), but lower 400 W rating and SMA (DO-214AC) package | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and 1500 W surge margin |
| SMCJ40CA | Same VWM (40 V) and PPPM (1500 W), but larger SMC (DO-214AB) package and higher RθJA (50 °C/W) | Requires more PCB area; thermal performance less optimized for dense layouts | Select when existing SMC footprint reuse is prioritized over space-constrained designs |
Compared with SMAJ40CA and SMCJ40CA, the SMCG40CA-E3/57T delivers identical 1500 W surge capability in a smaller DO-215AB outline with superior thermal resistance (RθJA = 75 °C/W vs. 50 °C/W for SMCJ), while maintaining AEC-Q101 compliance - making it optimal for space-limited automotive and industrial edge nodes.
Availability
SMCG40CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply and full traceability.
Supply support for SMCG40CA-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive and industrial applications where board space, thermal performance, and qualification rigor are critical.
FAQ
What is the clamping voltage of the SMCG40CA-E3/57T at its rated peak pulse current?
The SMCG40CA-E3/57T has a maximum clamping voltage (VC) of 64.5 V at 23.3 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value is confirmed in the Electrical Characteristics table of Vishay document 88457 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG40CA-E3/57T maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Is the SMCG40CA-E3/57T suitable for automotive applications?
Yes, the SMCG40CA-E3/57T is AEC-Q101 qualified, as explicitly stated in the Mechanical Data section of Vishay document 88457. Its qualification covers temperature cycling, humidity testing, and mechanical shock - validating its use in engine control units, body electronics, and ADAS sensor interfaces. The SMCG40CA-E3/57T also carries UL 497B recognition (QVGQ2), further supporting its deployment in safety-critical automotive subsystems.
What does the "CA" suffix indicate in SMCG40CA-E3/57T?
The "CA" suffix in SMCG40CA-E3/57T denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. As clarified in the Vishay datasheet, electrical characteristics-including breakdown voltage, clamping voltage, and leakage-apply identically in either direction. This eliminates polarity marking on the SMCG40CA-E3/57T package and simplifies PCB layout compared to unidirectional variants like SMCG40A.
What is the thermal resistance of the SMCG40CA-E3/57T, and how does it affect layout?
The SMCG40CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Thermal Characteristics table. This value assumes minimum recommended pad layout; reducing pad size increases thermal impedance and may require derating. The SMCG40CA-E3/57T's RθJL of 15 °C/W indicates efficient heat conduction to PCB traces, supporting reliable operation at TJ max. = +150 °C.
Does the SMCG40CA-E3/57T require special handling during reflow soldering?
No special handling is required: the SMCG40CA-E3/57T is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. It is compatible with standard lead-free reflow profiles and does not require pre-baking. The "E3" suffix confirms RoHS compliance and industrial-grade qualification, and the matte tin-plated leads meet solderability standards J-STD-002 and JESD22-B102 - all verified in the Mechanical Data section of Vishay document 88457 for the SMCG40CA-E3/57T.
SMCG40CA-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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 23.3A
- 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)
SMCG40CA-E3/57T FAQ
1.How can I place an order for SMCG40CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG40CA-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 SMCG40CA-E3/57T reliable?
The price and inventory of SMCG40CA-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 SMCG40CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG40CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG40CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG40CA-E3/57T?
SMCG40CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG40CA-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 SMCG40CA-E3/57T?
For technical support, including SMCG40CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG40CA-E3/57T requirements.
6.How does Aetrix verify that SMCG40CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG40CA-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 SMCG40CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG40CA-E3/57T?
All SMCG40CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG40CA-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 SMCG40CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG40CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG40CA-E3/57T Tags
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