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Vishay General Semiconductor - Diodes Division SMCG40A-M3/57T
- Part No.:
- SMCG40A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG40A-M3/57T.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,617
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Product details
Overview
SMCG40A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMCG (DO-215AB) package, featuring a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamping voltage of 64.5 V at 23.3 A IPPM. It protects MOSFETs and signal lines in automotive powertrain control modules against inductive switching transients.
For engineers reviewing the SMCG40A-M3/57T datasheet, SMCG40A-M3/57T pinout, SMCG40A-M3/57T application, or SMCG40A-M3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance, 150 °C max junction temperature, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its unidirectional configuration provides forward conduction capability with VF = 3.5 V at 100 A, enabling robust protection during reverse-polarity fault conditions in DC power rails.
The device operates within -55 °C to +150 °C junction temperature range and meets J-STD-020 MSL Level 1 (260 °C peak reflow). Thermal resistance is 75 °C/W junction-to-ambient (RθJA) and 15 °C/W junction-to-lead (RθJL), supporting reliable operation under high-energy 10/1000 μs surge waveforms without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V automotive systems. |
| VBR min/max | 44.4 V / 49.1 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transient events above nominal supply. |
| VC @ IPPM | 64.5 V at 23.3 A - Clamping voltage limits downstream IC stress during 1500 W 10/1000 μs surge; critical for IGBT gate driver protection. |
| PPPM | 1500 W - Peak pulse power rating validated per ANSI/IEEE C62.35; supports EN 61000-4-5 Level 4 immunity testing. |
| ID @ VWM | 1.0 μA - Ultra-low leakage preserves battery life in always-on vehicle networks such as CAN FD wake-up circuits. |
| TJ max | +150 °C - Enables deployment in engine bay environments without thermal derating penalties up to ambient 125 °C. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability including HTOL, TC, and UHAST; required for powertrain and ADAS subsystems. |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, surface-mount gull-wing package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., 48 V rail); conducts surge energy to ground when V > VBR. |
| Anode | Reference node | Typically tied to system ground; completes clamping path during overvoltage events on cathode-side traces. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications requiring zero-failure field performance over 15-year service life. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets EU Directive 2011/65/EU and IPC-1752A Tier 1 reporting; eliminates brominated flame retardants in molding compound. |
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) across temperature and lifetime, minimizing drift in safety-critical clamping thresholds. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak, simplifying high-volume SMT manufacturing. |
| Low RθJL (15 °C/W) | Facilitates efficient heat transfer from die to PCB copper pad, sustaining repetitive surge duty cycles without thermal runaway. |
Applications
| Automotive Power Distribution Unit | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protecting 48 V battery-fed power distribution nodes from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fused 48 V rail and microcontroller power input. Use Value: Clamps transients to ≤64.5 V, preventing damage to 65 V-rated DC-DC converters and ensuring ASIL-B functional safety compliance. |
Use Scenario: Shielding 24 V digital input channels from ESD and relay coil flyback in factory automation controllers. IC Role / Device Role / Timing Role: Primary front-end protection on isolated optocoupler inputs handling 24 V sensor signals. Use Value: Sub-1 ns response time suppresses fast-rising transients before isolation barrier, preserving signal integrity and reducing false triggering. |
| Onboard Charger (OBC) Gate Driver Circuit | EV Battery Management System (BMS) Cell Monitor Interface |
Use Scenario: Safeguarding high-side IGBT gate drivers from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to gate driver IC output pins, referenced to source node. Use Value: 1500 W PPPM rating absorbs multiple 10/1000 μs surges without degradation, extending gate driver MTBF in 11 kW OBC designs. |
Use Scenario: Protecting daisy-chained cell monitor ICs (e.g., BQ796xx) from bus coupling noise in 96-cell EV battery packs. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; unidirectional SMCG40A-M3/57T guards isolated UART lines referenced to local ground. Use Value: 1.0 μA ID at 40 V minimizes quiescent current draw on low-power monitoring rails, extending sleep-mode battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/52T | Same VWM (40 V) and PPPM (400 W), but lower 400 W rating; SMA package (DO-214AC), larger footprint and higher RθJA (110 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for load dump per ISO 7637-2 Pulse 5a. | Select when cost sensitivity outweighs surge robustness and board space permits larger SMA footprint. |
| SMCJ40A-M3/57T | Identical VWM (40 V), VBR (44.4–49.1 V), and PPPM (1500 W); same DO-215AB package but non-AEC-Q101 rated and standard RoHS (E3), not halogen-free (M3). | Acceptable for industrial/commercial use but excluded from automotive OEM BOMs requiring AEC-Q101 and halogen-free compliance. | Choose only for non-automotive applications where AEC-Q101 and halogen-free requirements are waived. |
Compared with SMAJ40A-E3/52T and SMCJ40A-M3/57T, the SMCG40A-M3/57T uniquely combines AEC-Q101 qualification, halogen-free construction, and DO-215AB packaging-enabling direct integration into automotive power electronics without redesign or compliance waivers.
Availability
SMCG40A-M3/57T is available at Aetrix Electronics and suitable for automotive powertrain control units, industrial programmable logic controllers, and EV onboard charger designs requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for SMCG40A-M3/57T 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMCG series was engineered specifically for AEC-Q101-compliant transient suppression in next-generation 48 V mild-hybrid and EV architectures, emphasizing low-profile mounting, thermal efficiency, and process consistency across high-volume SMT lines.
FAQ
What is the clamping voltage of SMCG40A-M3/57T at its rated peak pulse current?
The SMCG40A-M3/57T has a maximum clamping voltage (VC) of 64.5 V at 23.3 A peak pulse current (IPPM), measured under the standardized 10/1000 μs waveform. This value ensures protected downstream components-such as 65 V-rated DC-DC controllers-remain within safe operating limits during surge events. The SMCG40A-M3/57T maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMCG40A-M3/57T qualified for automotive applications?
Yes, the SMCG40A-M3/57T is AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST). This qualification confirms suitability for automotive powertrain, body electronics, and ADAS subsystems. The SMCG40A-M3/57T also carries the HM3 suffix variant for full AEC-Q101 + halogen-free compliance.
What does the "M3" suffix indicate in SMCG40A-M3/57T?
The "M3" suffix in SMCG40A-M3/57T denotes halogen-free, RoHS-compliant construction meeting IPC-1752A material declaration standards, with no brominated or chlorinated flame retardants in the epoxy molding compound. It also signifies compliance with JESD 201 Class 2 whisker resistance testing. This distinguishes it from the "E3" (RoHS only) and "HM3" (AEC-Q101 + halogen-free) variants of the same base part.
Can SMCG40A-M3/57T be used in bidirectional configurations?
No, SMCG40A-M3/57T is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., SMCG40CA), which features symmetrical breakdown in both polarities. Using SMCG40A-M3/57T in reverse-biased AC applications would result in forward conduction and potential failure; always verify polarity alignment in schematic capture.
What is the recommended PCB pad layout for SMCG40A-M3/57T?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCG40A-M3/57T to achieve rated 1500 W peak pulse power and thermal performance. The pad layout must follow the DO-215AB outline in the datasheet (Document Number: 88457), including 0.058" lead width and 0.020" maximum thickness. Deviation reduces IPPM capability and increases RθJA beyond the specified 75 °C/W.
SMCG40A-M3/57T 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-M3/57T FAQ
1.How can I place an order for SMCG40A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG40A-M3/57T 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-M3/57T reliable?
The price and inventory of SMCG40A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG40A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG40A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG40A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG40A-M3/57T?
SMCG40A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG40A-M3/57T 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-M3/57T?
For technical support, including SMCG40A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG40A-M3/57T requirements.
6.How does Aetrix verify that SMCG40A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG40A-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG40A-M3/57T?
All SMCG40A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG40A-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCG40A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG40A-M3/57T Tags
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