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Vishay General Semiconductor - Diodes Division SMCG40A-E3/57T
- Part No.:
- SMCG40A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG40A-E3/57T.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,761
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Product details
Overview
SMCG40A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, featuring a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 23.3 A peak pulse current (IPPM), and 64.5 V maximum clamping voltage (VC) under 10/1000 µs surge. It protects MOSFETs and ICs in automotive power electronics against inductive switching transients.
For engineers reviewing the SMCG40A-E3/57T datasheet, SMCG40A-E3/57T pinout, SMCG40A-E3/57T application, or SMCG40A-E3/57T equivalent, key selection criteria include clamping voltage margin relative to protected device VDS(max), thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification for automotive use, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified VBR range (44.4–49.1 V). Its low incremental surge resistance and fast response time enable effective suppression of transient energy from load dump or relay bounce events.
The device uses a glass-passivated silicon junction and is rated for TJ = –55 °C to +150 °C operation. It meets J-STD-020 MSL Level 1, supports 260 °C lead-free reflow, and is qualified to AEC-Q101 for automotive under-hood applications.
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 at IT = 1 mA - Ensures reliable turn-on above system nominal voltage with margin |
| VC @ IPPM | 64.5 V - Clamping voltage during 10/1000 µs surge; must stay below protected device's absolute max rating |
| PPPM | 1500 W - Peak transient power it can absorb without failure under standardized waveform |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on recommended 8.0 mm × 8.0 mm pad layout |
| IFSM | 200 A - Non-repetitive forward surge capability (unidirectional only) |
| Package | SMCG (DO-215AB) - Low-profile, gull-wing SMT package optimized for automated placement and high-power density |
Pinout & Package
SMCG40A-E3/57T uses the SMCG (DO-215AB) surface-mount package: 2-terminal, gull-wing leads, cathode indicated by band marking. Dimensions: 7.87 mm × 3.17 mm × 2.41 mm (L × W × H); mounting requires 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal per Vishay recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to circuit ground or lower-potential node in unidirectional configuration |
| Cathode | Clamping output / Surge sink | Connected to protected line (e.g., 40 V rail); absorbs transient energy into ground path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood environments including temperature cycling, humidity, and mechanical shock |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under repeated surge stress |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles without preconditioning |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin |
| RoHS-compliant, matte tin plating | Ensures solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting 42 V battery-fed ECUs and body control modules from load-dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and chassis ground to clamp surges before they reach downstream DC-DC converters. Use Value: With VC = 64.5 V and VWM = 40 V, provides 24.5 V headroom over nominal 42 V system while staying well below typical 65–75 V input limits of buck controllers. | Use Scenario: Safeguarding gate drivers and IGBTs in 48 V industrial motor inverters subjected to inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Mounted across DC bus rails to suppress voltage spikes generated by rapid current interruption in motor windings. Use Value: 1500 W PPPM rating handles repetitive 10/1000 µs surges common in 20 kHz PWM systems; RθJA = 75 °C/W enables stable operation at 85 °C ambient with minimal derating. |
| Telecom DC Power Input | Automotive Sensor Signal Line Protection |
Use Scenario: Guarding primary-side inputs of telecom power supplies against lightning-induced surges on -48 V DC feeds. IC Role / Device Role / Timing Role: First-stage unidirectional clamp on input rectifier output, upstream of bulk capacitor and PFC stage. Use Value: 200 A IFSM rating supports single-event surge robustness; bidirectional variants (e.g., SMCG40CA) are used where AC-coupled lines require symmetrical clamping. | Use Scenario: Shielding LIN bus transceivers and Hall-effect sensors from ESD and cable discharge events in vehicle door modules. IC Role / Device Role / Timing Role: Localized TVS placed directly at connector interface, shunting transients to local ground plane before signal enters IC. Use Value: Fast response time and low VC ensure sensor logic remains within safe operating area during ±8 kV contact ESD (IEC 61000-4-2); AEC-Q101 qualification guarantees lifetime reliability in vibration-prone locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/57T | Same VWM (40 V), but lower PPPM (400 W), higher VC (64.5 V), SMA (DO-214AC) package | Limited to lower-energy transients; less suitable for automotive load dump | Select SMCG40A-E3/57T when >1 kW surge handling or AEC-Q101 compliance is required |
| SMCJ40A-E3/57T | Same VWM (40 V), higher PPPM (1500 W), identical VC (64.5 V), but larger SMC (DO-214AB) package | Requires more PCB area; not optimized for high-density automotive modules | Choose SMCG40A-E3/57T for space-constrained layouts needing equal power rating in smaller footprint |
Compared with SMAJ40A-E3/57T and SMCJ40A-E3/57T, SMCG40A-E3/57T delivers identical 1500 W surge capability and clamping performance in a 30 % smaller footprint than SMC and with AEC-Q101 validation absent in SMAJ, making it optimal for next-gen automotive and industrial SMT designs demanding miniaturization and qualification rigor.
Availability
SMCG40A-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, and telecom DC input circuits requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMCG40A-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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive-grade qualification.
The SMCG series was developed specifically for high-power, space-constrained transient suppression in automotive and industrial applications-balancing low profile, AEC-Q101 compliance, and 1500 W surge capability in DO-215AB packaging.
FAQ
What is the clamping voltage of SMCG40A-E3/57T under a 10/1000 µs surge?
The SMCG40A-E3/57T has a maximum clamping voltage (VC) of 64.5 V when subjected to its rated peak pulse current (IPPM = 23.3 A) using the standard 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions and defines the upper voltage limit imposed on the protected circuit during transient events. Designers must verify that 64.5 V remains safely below the absolute maximum voltage rating of downstream components such as MOSFETs or DC-DC controllers in the SMCG40A-E3/57T application.
Is SMCG40A-E3/57T qualified for automotive use?
Yes, SMCG40A-E3/57T is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS subsystems. The "E3" suffix denotes RoHS-compliant, industrial-grade construction, and the device meets all stress tests defined in AEC-Q101, including temperature cycling, humidity, and mechanical shock. This qualification applies specifically to the SMCG40A-E3/57T variant-not generic family-level claims-and is documented in Vishay's official qualification report referenced in datasheet revision 09-Jan-2024.
What is the thermal resistance of SMCG40A-E3/57T, and how does it affect layout?
The SMCG40A-E3/57T 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 pad per terminal. This value assumes no additional heatsinking and directly impacts power derating: at 85 °C ambient, its usable power dissipation drops to ~4.3 W. To maintain reliability, PCB layout must replicate Vishay's pad dimensions and avoid narrow traces or isolated copper islands near the SMCG40A-E3/57T terminals.
How does SMCG40A-E3/57T differ from SMCG40CA?
SMCG40A-E3/57T is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where surge direction is known (e.g., positive supply to ground). SMCG40CA is bidirectional, lacking polarity marking, and designed for AC-coupled or differential signal lines like CAN or LIN buses where transients may occur in either polarity. Both share identical VWM (40 V), PPPM (1500 W), and VC (64.5 V), but their breakdown symmetry and application contexts differ fundamentally-SMCG40A-E3/57T cannot substitute for SMCG40CA in bidirectional roles without circuit redesign.
What is the surge current rating of SMCG40A-E3/57T, and how is it tested?
The SMCG40A-E3/57T is rated for 23.3 A peak pulse current (IPPM) under the standardized 10/1000 µs double-exponential waveform, derived from its 1500 W PPPM rating and 64.5 V clamping voltage (IPPM = PPPM / VC). This test condition reflects worst-case transient energy from inductive switching or load dump. Additionally, it supports 200 A non-repetitive forward surge (IFSM) for 8.3 ms half-sine wave-applicable only in unidirectional forward-bias scenarios. These ratings are validated per ANSI/IEEE C62.35 and published in Vishay document 88457.
SMCG40A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCG40A-E3/57T FAQ
1.How can I place an order for SMCG40A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG40A-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 SMCG40A-E3/57T reliable?
The price and inventory of SMCG40A-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 SMCG40A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG40A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG40A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG40A-E3/57T?
SMCG40A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG40A-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 SMCG40A-E3/57T?
For technical support, including SMCG40A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG40A-E3/57T requirements.
6.How does Aetrix verify that SMCG40A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG40A-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 SMCG40A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG40A-E3/57T?
All SMCG40A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG40A-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 SMCG40A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG40A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG40A-E3/57T Tags
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