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Vishay General Semiconductor - Diodes Division SMCG30CA-M3/9AT
- Part No.:
- SMCG30CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG30CA-M3/9AT.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,327
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Product details
Overview
SMCG30CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection with 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). It is AEC-Q101 qualified and used to protect automotive sensor signal lines, power rails, and interface circuits against inductive switching transients and ESD.
For engineers reviewing the SMCG30CA-M3/9AT datasheet, SMCG30CA-M3/9AT pinout, SMCG30CA-M3/9AT application, or SMCG30CA-M3/9AT equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 75 °C/W), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification status - all critical for automotive-grade circuit protection design and BOM validation.
Technical Context
The SMCG30CA-M3/9AT operates as a bidirectional avalanche diode, exhibiting symmetrical breakdown characteristics in both polarities with minimum/maximum breakdown voltages of 33.3 V and 36.8 V at 1.0 mA test current. Its low incremental surge resistance enables fast response to 10/1000 µs transients while maintaining stable clamping under repetitive surge stress.
Designed for surface-mount implementation on 8.0 mm × 8.0 mm copper pads per terminal, it achieves 1500 W peak pulse power dissipation and supports operating junction temperatures from –55 °C to +150 °C. The device meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 33.3 V / 36.8 V - guaranteed symmetric breakdown range at 1.0 mA, defining turn-on threshold |
| VC @ IPPM | 48.4 V at 31.0 A - clamped voltage during 10/1000 µs surge, limiting downstream voltage stress |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding PCB copper pad sizing for thermal management |
| Package | SMCG (DO-215AB) - low-profile SMD outline with gull-wing leads, optimized for automated placement |
| Qualification | AEC-Q101 qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SMCG30CA-M3/9AT uses the SMCG (DO-215AB) surface-mount package: a bidirectional device with no polarity marking, featuring two gull-wing terminals mounted on 8.0 mm × 8.0 mm copper pads per lead. The case is UL 94 V-0 rated, matte tin plated, and compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; symmetrical conduction path |
| Terminal 2 | Anode/Cathode (bidirectional) | Identical function to Terminal 1; no marking required for bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity constraints |
| AEC-Q101 qualification | Validated for automotive under-hood and chassis applications requiring extended temperature and reliability compliance |
| Halogen-free (M3 suffix) | Meets environmental requirements for industrial and automotive systems with strict material restrictions |
| Low RθJA (75 °C/W) | Supports sustained surge duty cycles without thermal runaway when mounted on recommended copper area |
| MSL Level 1 rating | Allows direct placement into standard reflow profiles up to 260 °C peak without pre-baking |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of engine knock sensors and pressure transducers exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning ICs. Use Value: Limits transient voltage to ≤48.4 V during 31 A surges, preserving ADC input integrity and preventing latch-up in downstream op-amps. | Use Scenario: Safeguarding CANH/CANL differential pair in vehicle body control modules against ESD and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp across differential bus lines, maintaining signal integrity up to 1 Mbps. Use Value: Clamps ±30 V transients within nanoseconds while adding <1 pF parasitic capacitance, avoiding CAN timing skew. |
| Power Supply Rail Protection | Telecom Line Card Surge Suppression |
Use Scenario: Guarding 3.3 V/5 V microcontroller supply rails in ADAS domain controllers against coupled transients from adjacent high-current solenoid drivers. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between rail and ground, activated only during overvoltage events exceeding 30 V. Use Value: Prevents brownout resets and internal LDO damage by clamping 1500 W surges without affecting normal 5 V rail regulation. | Use Scenario: Front-end protection of Ethernet PHY interfaces in outdoor telecom base stations subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary coarse-clamp stage before secondary TVS array and common-mode chokes on RJ45 lines. Use Value: Absorbs >90% of 10/1000 µs line-to-ground surges up to 1500 W, reducing stress on downstream protection components. |
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 VC (48.4 V), but lower PPPM (400 W) and smaller SMA package (DO-214AC) | Limited to lower-energy transients; unsuitable for automotive load-dump where 1500 W is required | Select SMAJ30CA only for space-constrained consumer electronics with sub-500 W surge exposure. |
| SMCJ30CA | Same VWM (30 V) and PPPM (1500 W), but larger SMC package (DO-214AB) and higher RθJA (85 °C/W) | Requires larger PCB footprint and more copper area for thermal management; not AEC-Q101 qualified | Choose SMCJ30CA only if AEC-Q101 is not required and board layout allows DO-214AB footprint. |
Compared with SMAJ30CA and SMCJ30CA, the SMCG30CA-M3/9AT uniquely combines 1500 W surge capability, AEC-Q101 qualification, halogen-free construction, and DO-215AB's optimized thermal performance (RθJA = 75 °C/W), making it the preferred choice for automotive and industrial applications demanding reliability, regulatory compliance, and compact thermal design.
Availability
SMCG30CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface hardening, and telecom line card surge suppression requiring stable component supply across production lifecycles.
Supply support for SMCG30CA-M3/9AT 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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, bidirectional transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and robust surge handling are mandatory.
FAQ
What is the clamping voltage of SMCG30CA-M3/9AT at its rated peak pulse current?
The SMCG30CA-M3/9AT has a maximum clamping voltage (VC) of 48.4 V at 31.0 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value ensures downstream circuitry remains within safe voltage limits during surge events. The SMCG30CA-M3/9AT maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMCG30CA-M3/9AT suitable for automotive applications?
Yes, SMCG30CA-M3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and chassis environments. Its bidirectional architecture, 1500 W surge rating, and halogen-free (M3) construction meet stringent automotive reliability and environmental requirements. The SMCG30CA-M3/9AT is commonly deployed in ADAS sensor modules and body control units.
What does the "M3" suffix indicate in SMCG30CA-M3/9AT?
The "M3" suffix denotes halogen-free, RoHS-compliant construction with industrial-grade reliability and JESD201 Class 2 whisker resistance. It distinguishes the SMCG30CA-M3/9AT from E3 (standard RoHS) and HM3 (AEC-Q101 + halogen-free) variants. All M3-suffix devices meet UL 94 V-0 flammability and 260 °C MSL Level 1 reflow specifications.
How does SMCG30CA-M3/9AT differ from unidirectional SMCG30A-M3/9AT?
The SMCG30CA-M3/9AT is bidirectional with symmetrical breakdown (33.3–36.8 V) and no polarity marking, while SMCG30A-M3/9AT is unidirectional with cathode band marking and forward voltage drop (VF = 3.5 V at 100 A). The CA version protects AC or differential signals; the A version suits DC rail-to-ground clamping only. Their packages and surge ratings are identical.
What PCB layout guidance applies to SMCG30CA-M3/9AT for optimal thermal performance?
For optimal thermal performance, SMCG30CA-M3/9AT must be mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the datasheet. This layout achieves the rated RθJA of 75 °C/W. Reducing pad size increases junction temperature and de-rates PPPM. The SMCG30CA-M3/9AT thermal model assumes this minimum copper area and no internal layer heatsinking.
SMCG30CA-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for SMCG30CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG30CA-M3/9AT 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-M3/9AT reliable?
The price and inventory of SMCG30CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG30CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG30CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG30CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG30CA-M3/9AT?
SMCG30CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG30CA-M3/9AT 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-M3/9AT?
For technical support, including SMCG30CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG30CA-M3/9AT requirements.
6.How does Aetrix verify that SMCG30CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG30CA-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG30CA-M3/9AT?
All SMCG30CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG30CA-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG30CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG30CA-M3/9AT Tags
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