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Vishay General Semiconductor - Diodes Division SMCG40CAHE3/57T
- Part No.:
- SMCG40CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG40CAHE3/57T.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,537
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Product details
Overview
SMCG40CAHE3/57T 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 40 V standoff voltage (VWM), 64.5 V maximum clamping voltage (VC) at 23.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCG40CAHE3/57T datasheet, SMCG40CAHE3/57T pinout, SMCG40CAHE3/57T application, or SMCG40CAHE3/57T equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, DO-215AB terminal mapping, bidirectional clamping behavior, and direct alternatives for ESD/surge-critical designs.
Technical Context
This device operates as a bidirectional avalanche diode, symmetrically clamping transient voltages above ±44.4 V (min VBR) and below ±40 V (VWM) without polarity dependence. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C peak.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The 1500 W PPPM rating applies under standardized 10/1000 µs surge conditions on 8.0 mm × 8.0 mm copper pads - critical for validating PCB layout compliance in high-energy transient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal line bias margin. |
| VBR (min/max) | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 64.5 V at 23.3 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 1500 W - Peak pulse power handling capability; validates survivability against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at standoff voltage; ensures minimal DC loading on sensitive analog or logic inputs. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive and industrial ambient conditions. |
| AEC-Q101 | Qualified - Certified for automotive electronic systems per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing package with matte tin-plated leads, compliant with J-STD-002 solderability and JESD 22-B102 whisker testing (Class 2). No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Interchangeable connection point; symmetrical conduction enables placement without orientation constraints. |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal forming bidirectional clamping path; requires equal trace impedance for balanced surge response. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines (e.g., CAN, RS-485) without polarity concerns. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V/5 V microcontrollers and transceivers. |
| MSL Level 1 rating | Permits standard SMT reflow without dry-pack or baking, reducing manufacturing complexity and cost. |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature, critical for long-term field reliability in industrial deployments. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting LIN bus 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 TVS placed across signal-to-ground or differential pair to clamp transients before reaching MCU ADC or comparator inputs. Use Value: Limits clamped voltage to 64.5 V, safeguarding 5 V-tolerant interface circuitry while surviving 1500 W surges per IEC 61000-4-5. |
Use Scenario: Shielding PLC digital input modules from inductive kickback when switching solenoids or relays in factory automation. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input lines to divert surge energy away from optocoupler or Schmitt trigger front-end. Use Value: Withstands 23.3 A peak pulse current and maintains <1.0 µA leakage at 40 V, preserving input threshold accuracy during normal operation. |
| Telecom Line Protection | Consumer Power Adapter Input |
|
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE controller ICs against lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Bidirectional suppression across transformer secondary windings or data pairs to prevent damage to PHY transceivers. Use Value: Symmetric 44.4–49.1 V breakdown and 64.5 V clamping ensure balanced protection on differential signaling lines without skew. |
Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters and AC/DC wall adapters exposed to mains transients. IC Role / Device Role / Timing Role: Clamp component placed between rectified output and primary-side controller feedback network to prevent false triggering. Use Value: 1500 W PPPM rating and +150 °C TJ max enable sustained operation in compact, thermally constrained adapter enclosures. |
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 VC (64.5 V), but lower PPPM (400 W); SMA package (DO-214AC) vs. SMCG (DO-215AB). | Limited to lower-energy transients (IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 surge immunity. | Select SMAJ40CA only for space-constrained consumer designs where 1500 W surge immunity is not required. |
| SMCJ40CA | Identical VWM (40 V), VC (64.5 V), and PPPM (1500 W); same DO-215AB package but non-AEC-Q101 rated. | Approved for industrial/commercial use only; lacks automotive qualification and extended temperature validation. | Choose SMCJ40CA for cost-sensitive industrial applications where AEC-Q101 is not mandated. |
Compared with SMCG40CAHE3/57T, SMAJ40CA offers smaller footprint but insufficient surge rating for automotive or heavy industrial use, while SMCJ40CA matches power performance but omits AEC-Q101 validation - making SMCG40CAHE3/57T the sole option when both 1500 W immunity and automotive qualification are mandatory.
Availability
SMCG40CAHE3/57T 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 AEC-Q101 compliance.
Supply support for SMCG40CAHE3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCG series targets high-energy transient suppression in harsh environments, engineered specifically for automotive, industrial, and telecom applications demanding AEC-Q101 qualification and 1500 W surge resilience.
FAQ
What is the clamping voltage of SMCG40CAHE3/57T at its rated peak pulse current?
The SMCG40CAHE3/57T has a maximum clamping voltage (VC) of 64.5 V at 23.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC guidelines and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMCG40CAHE3/57T suitable for automotive applications?
Yes, SMCG40CAHE3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity, and guaranteed operation from –55 °C to +150 °C - meeting requirements for engine control units, ADAS sensors, and body electronics subjected to load dump and ISO 7637-2 transients.
How does the bidirectional configuration of SMCG40CAHE3/57T affect PCB layout?
The bidirectional nature of SMCG40CAHE3/57T eliminates polarity marking and orientation constraints - both terminals are functionally identical. Layout requires symmetric trace routing and equal copper pad area (minimum 8.0 mm × 8.0 mm per terminal) to ensure balanced surge current sharing and avoid thermal imbalance during high-energy events.
What is the standoff voltage (VWM) and why is it critical for SMCG40CAHE3/57T selection?
The SMCG40CAHE3/57T has a 40 V standoff voltage (VWM), meaning it remains non-conductive up to this DC or RMS voltage level. This parameter is critical because it must exceed the maximum normal operating voltage of the protected line (e.g., 24 V industrial bus or 36 V automotive battery) to prevent leakage-induced power loss or false triggering while maintaining sufficient margin before clamping begins.
Does SMCG40CAHE3/57T require derating at elevated ambient temperatures?
Yes, SMCG40CAHE3/57T must be derated above TA = 25 °C per Figure 2 in the datasheet. Its peak pulse power (PPPM) decreases linearly with rising junction temperature, and thermal resistance values (RθJA = 75 °C/W, RθJL = 15 °C/W) dictate that PCB copper area and airflow directly impact usable surge capacity - especially in sealed enclosures exceeding 85 °C ambient.
SMCG40CAHE3/57T 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG40CAHE3/57T FAQ
1.How can I place an order for SMCG40CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG40CAHE3/57T 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 SMCG40CAHE3/57T reliable?
The price and inventory of SMCG40CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG40CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG40CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG40CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG40CAHE3/57T?
SMCG40CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG40CAHE3/57T 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 SMCG40CAHE3/57T?
For technical support, including SMCG40CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG40CAHE3/57T requirements.
6.How does Aetrix verify that SMCG40CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG40CAHE3/57T 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 SMCG40CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG40CAHE3/57T?
All SMCG40CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG40CAHE3/57T, 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 SMCG40CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCG40CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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