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Vishay General Semiconductor - Diodes Division SMCG30CA-M3/57T
- Part No.:
- SMCG30CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG30CA-M3/57T.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,741
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Product details
Overview
SMCG30CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of signal and power lines. It features a 30 V standoff voltage (VWM), 48.4 V clamping voltage (VC) at 31.0 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 SMCG30CA-M3/57T datasheet, SMCG30CA-M3/57T pinout, SMCG30CA-M3/57T application, or SMCG30CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), and DO-215AB thermal performance under repetitive surge conditions.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism to divert surge energy away from protected circuitry. Its bidirectional symmetry ensures identical clamping behavior in both polarities, with breakdown voltage (VBR) specified at 33.3–36.8 V (min/max) and test current IT = 1.0 mA.
Thermal design relies on low junction-to-lead resistance (RθJL = 15 °C/W) and junction-to-ambient resistance (RθJA = 75 °C/W) when mounted on 8.0 mm × 8.0 mm copper pads. It supports operation from –55 °C to +150 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 33.3 V / 36.8 V - guaranteed avalanche breakdown range at 1.0 mA test current |
| VC @ IPPM | 48.4 V - clamped voltage across device at 31.0 A peak pulse current (10/1000 µs) |
| PPPM | 1500 W - peak transient power handling capacity without failure |
| ID @ VWM | 1.0 µA - leakage current at rated standoff voltage, ensuring minimal standby loading |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMCG (DO-215AB) - surface-mount gull-wing package with 7.87 mm × 10.16 mm footprint and 1.90 mm height |
Pinout & Package
SMCG30CA-M3/57T uses the SMCG (DO-215AB) package: a bidirectional surface-mount TVS diode with two terminals in gull-wing configuration. No polarity marking is present on bidirectional variants. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated thermal and surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients - symmetrical conduction |
| Cathode | Transient return path (bidirectional) | Acts as anode during positive transients and cathode during negative transients - no fixed polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JEDEC standards |
| Halogen-free & RoHS compliant (M3) | Meets IEC 61249-2-21 and JESD201 Class 2 whisker resistance requirements |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio = 1.45) and lower let-through energy during fast transients |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C Pb-free reflow without baking preconditioning |
| Glass passivated junction | Provides stable breakdown characteristics and long-term parameter stability under thermal and humidity stress |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing ±100 V/500 ms transients without latch-up. Use Value: Enables direct interface with AEC-Q100 qualified microcontrollers by limiting voltage excursion to ≤48.4 V during 31 A surges. | Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff protector across input terminals, activated only during >33.3 V excursions with sub-nanosecond response. Use Value: Maintains <1.0 µA leakage at 30 V, eliminating false triggering while surviving repeated 1500 W transients per IEC 61000-4-5. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding RS-485/RS-422 differential pairs in base station backhaul equipment from lightning-induced surges. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per line) referenced to chassis ground, clamping common-mode transients up to ±300 V. Use Value: Matches differential impedance due to symmetric bidirectional structure and low capacitance (<100 pF at 0 V), preserving signal integrity at 10 Mbps. | Use Scenario: Secondary-side overvoltage suppression on 5–24 V DC outputs of wall adapters exposed to user-handling ESD and cable coupling events. IC Role / Device Role / Timing Role: Final-stage clamp after DC-DC regulation, shunting transients before reaching USB-PD or charging ICs. Use Value: Halogen-free (M3) construction satisfies IEC 62368-1 material requirements while delivering 1500 W surge immunity in compact DO-215AB outline. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | Same VWM (30 V) and PPPM (400 W), but lower power rating and SMA package (DO-214AC) | Limited to ≤400 W surges; unsuitable for ISO 7637-2 Pulse 5a testing | Select SMCG30CA-M3/57T when 1500 W surge immunity and AEC-Q101 qualification are required. |
| SMCJ30CA | Same VWM (30 V) and PPPM (1500 W), but SMC (DO-214AB) package with higher RθJA (85 °C/W) | Requires larger PCB area and enhanced thermal relief for equivalent thermal performance | Choose SMCG30CA-M3/57T for space-constrained layouts needing DO-215AB's smaller footprint and superior RθJL (15 °C/W). |
Compared with SMAJ30CA and SMCJ30CA, SMCG30CA-M3/57T delivers identical electrical clamping performance in a thermally optimized, automotive-qualified DO-215AB package - offering best-in-class surge density (W/mm²) and compatibility with high-volume automated placement.
Availability
SMCG30CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and consumer power adapter ESD protection requiring stable component supply and full traceability.
Supply support for SMCG30CA-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 application-specific optimization.
The SMCG series was developed for high-power, space-constrained transient suppression in automotive and industrial systems - combining AEC-Q101 qualification, halogen-free compliance, and DO-215AB thermal efficiency in a single platform.
FAQ
What is the clamping voltage of SMCG30CA-M3/57T at its rated peak pulse current?
The SMCG30CA-M3/57T has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated 31.0 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream circuitry sees no more than 48.4 V during worst-case surge events - critical for safeguarding 3.3 V or 5 V logic interfaces.
Is SMCG30CA-M3/57T suitable for automotive applications?
Yes, SMCG30CA-M3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes halogen-free molding compound (M3 suffix), glass passivated junction, and MSL Level 1 reflow compatibility - meeting requirements for engine control units, body electronics, and ADAS sensor modules per ISO 16750 and ISO 7637-2.
How does the bidirectional nature of SMCG30CA-M3/57T affect its circuit implementation?
SMCG30CA-M3/57T has no polarity marking and conducts identically in both directions, making it ideal for protecting AC-coupled or differential signal lines (e.g., RS-485, CAN). Unlike unidirectional TVS diodes, it eliminates the need for orientation verification during placement and ensures consistent clamping regardless of transient polarity - simplifying layout and reducing assembly errors.
What is the thermal resistance profile of SMCG30CA-M3/57T, and how does it impact PCB layout?
SMCG30CA-M3/57T specifies RθJL = 15 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient) when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To achieve rated 1500 W surge capability, designers must implement minimum pad dimensions and avoid thermal isolation - undersized pads increase junction temperature and risk parametric shift or failure during repetitive surges.
Does SMCG30CA-M3/57T require derating at elevated ambient temperatures?
Yes, SMCG30CA-M3/57T must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Document Number: 88457). At 85 °C ambient, its peak pulse power drops to approximately 750 W - 50 % of the 25 °C rating. This linear derating ensures safe operation within the –55 °C to +150 °C junction temperature range and must be factored into system-level surge margin calculations.
SMCG30CA-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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)
SMCG30CA-M3/57T FAQ
1.How can I place an order for SMCG30CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG30CA-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 SMCG30CA-M3/57T reliable?
The price and inventory of SMCG30CA-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 SMCG30CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG30CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG30CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG30CA-M3/57T?
SMCG30CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG30CA-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 SMCG30CA-M3/57T?
For technical support, including SMCG30CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG30CA-M3/57T requirements.
6.How does Aetrix verify that SMCG30CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG30CA-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 SMCG30CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG30CA-M3/57T?
All SMCG30CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG30CA-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 SMCG30CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCG30CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG30CA-M3/57T Tags
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