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Vishay General Semiconductor - Diodes Division SMCG40CA-M3/57T
- Part No.:
- SMCG40CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG40CA-M3/57T.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,909
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Product details
Overview
SMCG40CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for clamping voltage transients on signal and power lines. It features a 40 V stand-off 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 - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers.
For engineers reviewing the SMCG40CA-M3/57T datasheet, SMCG40CA-M3/57T pinout, SMCG40CA-M3/57T application, or SMCG40CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), DO-215AB thermal performance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a bidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown behavior across both polarities. Its clamping response is optimized for fast transients (sub-nanosecond intrinsic response), with low incremental surge resistance ensuring minimal voltage overshoot during 10/1000 µs surges up to 1500 W.
Designed for surface-mount use in high-reliability environments, SMCG40CA-M3/57T meets MSL Level 1 per J-STD-020 (260 °C peak reflow), supports operating junction temperatures from –55 °C to +150 °C, and is qualified to AEC-Q101 for automotive under-hood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum continuous reverse stand-off voltage before clamping begins; defines safe operating window for protected circuitry |
| VBR min/max | 44.4 V / 49.1 V - breakdown voltage range at 1 mA test current; ensures consistent turn-on across production lots |
| VC @ IPPM | 64.5 V at 23.3 A - clamped voltage during 10/1000 µs surge; determines worst-case overvoltage seen by downstream ICs |
| PPPM | 1500 W - peak pulse power handling; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| TJ max | +150 °C - maximum junction temperature; supports operation in engine control units and industrial motor drives |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient on standard 8.0 mm × 8.0 mm pads; informs heatsinking requirements |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD; required for ASIL-B systems |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, gull-wing surface-mount package with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical avalanche junction; conducts during positive transients relative to cathode |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; conducts during negative transients - functionally identical to anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature; eliminates risk of junction degradation under repeated surge stress |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and EU Directive 2015/863 for hazardous substances |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak - compatible with standard lead-free SMT lines |
| Low incremental surge resistance | Minimizes VC rise under high di/dt conditions, improving protection margin for fast-rising ESD and lightning-induced transients |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching noise in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor output and microcontroller ADC input or LIN transceiver pins. Use Value: Limits transient voltage to ≤64.5 V during 10/1000 µs surges, preventing latch-up or gate oxide damage in 3.3 V/5 V automotive MCUs. | Use Scenario: Safeguarding PLC digital input modules connected to 24 V DC field wiring exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each input channel, mounted directly at connector entry point. Use Value: Absorbs 1500 W surge energy while maintaining <100 ns response, preserving signal integrity for 10 kHz switching inputs. |
| Telecom Line Driver Protection | Consumer USB Port ESD Suppression |
Use Scenario: Shielding RS-485/RS-422 differential line drivers in base station backhaul equipment from induced lightning surges. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per line) placed upstream of driver IC, referenced to ground plane. Use Value: Clamps common-mode transients to 64.5 V before they reach ±5 V tolerant driver inputs, meeting ITU-T K.20/21 immunity requirements. | Use Scenario: Adding secondary-level surge protection to USB 2.0 data lines (D+/D−) in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Bidirectional clamp bridging D+ and D− lines to shunt differential-mode ESD events. Use Value: Withstands >30 kV contact ESD (IEC 61000-4-2) without degradation, preserving signal rise time due to low junction capacitance (<100 pF at 0 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40CA-E3/57T | Same VWM (40 V) and VC (64.5 V), but lower PPPM (400 W); SMA (DO-214AC) package with higher RθJA (110 °C/W) | Limited to lower-energy transients (IEC 61000-4-2 only); unsuitable for IEC 61000-4-5 Level 3+ | Select when board space is constrained and surge energy is below 200 mJ |
| SMCJ40CA-M3 | Same electrical specs and DO-214AB package, but non-tape-and-reel (bulk) packaging; identical thermal and AEC-Q101 qualification | No difference in circuit performance; differs only in logistics and assembly handling | Select when procurement uses bulk delivery or manual placement is acceptable |
Compared with SMAJ40CA-E3/57T and SMCJ40CA-M3, SMCG40CA-M3/57T delivers superior surge robustness (1500 W vs. 400 W) in a thermally optimized DO-215AB package, while maintaining AEC-Q101 qualification and halogen-free compliance - making it optimal for high-reliability automotive and industrial designs requiring full IEC 61000-4-5 compliance.
Availability
SMCG40CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, and telecom line driver applications requiring stable component supply, long-term lifecycle support, and AEC-Q101–qualified parts.
Supply support for SMCG40CA-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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMCG series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against repetitive surge stress and extended temperature operation are critical.
FAQ
What is the clamping voltage of SMCG40CA-M3/57T at its rated peak pulse current?
The SMCG40CA-M3/57T has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPPM) of 23.3 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG40CA-M3/57T maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMCG40CA-M3/57T suitable for automotive applications?
Yes, SMCG40CA-M3/57T is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its halogen-free (M3) construction, MSL Level 1 reflow rating, and guaranteed operation from –55 °C to +150 °C meet stringent automotive reliability requirements. The SMCG40CA-M3/57T is listed in Vishay's AEC-Q101 qualified product portfolio with full test reports available upon request.
What does the "CA" suffix indicate in SMCG40CA-M3/57T?
The "CA" suffix in SMCG40CA-M3/57T denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMCG40A), the SMCG40CA-M3/57T has no polarity marking and functions identically in either direction - essential for protecting AC-coupled lines, differential buses, or floating nodes where voltage polarity is undefined.
How does the SMCG40CA-M3/57T package compare to SMAJ or SMCJ equivalents?
The SMCG40CA-M3/57T uses the DO-215AB (SMCG) package, which offers lower thermal resistance (RθJA = 75 °C/W) than SMAJ (DO-214AC, RθJA ≈ 110 °C/W) and matches SMCJ (DO-214AB) in power handling but with improved gull-wing lead geometry for enhanced solder joint reliability. The SMCG40CA-M3/57T's package also supports tighter pitch layouts and better coplanarity control versus flat-lead alternatives, reducing tombstoning risk in high-volume SMT assembly.
What is the maximum reverse leakage current of SMCG40CA-M3/57T at its stand-off voltage?
At its 40 V stand-off voltage (VWM), the SMCG40CA-M3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This low leakage ensures minimal power loss and signal interference in always-on circuits such as automotive wake-up lines or industrial sensor bias networks. The SMCG40CA-M3/57T maintains leakage below 5.0 µA across its full operating temperature range, verified per JEDEC JESD22-A114.
SMCG40CA-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:
- -
- 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-M3/57T FAQ
1.How can I place an order for SMCG40CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG40CA-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 SMCG40CA-M3/57T reliable?
The price and inventory of SMCG40CA-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 SMCG40CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG40CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG40CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG40CA-M3/57T?
SMCG40CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG40CA-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 SMCG40CA-M3/57T?
For technical support, including SMCG40CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG40CA-M3/57T requirements.
6.How does Aetrix verify that SMCG40CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG40CA-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 SMCG40CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG40CA-M3/57T?
All SMCG40CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG40CA-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 SMCG40CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCG40CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG40CA-M3/57T Tags
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