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Vishay General Semiconductor - Diodes Division SMCG30CA-E3/9AT
- Part No.:
- SMCG30CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG30CA-E3/9AT.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,007
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Product details
Overview
SMCG30CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection on signal and power lines. It features a 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage (VC) at 31.0 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCG30CA-E3/9AT datasheet, SMCG30CA-E3/9AT pinout, SMCG30CA-E3/9AT application, or SMCG30CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical breakdown behavior in both directions due to its CA suffix designation. Its clamping response is optimized for fast transients induced by inductive load switching or ESD events, with typical junction capacitance below 100 pF at 0 V bias and thermal resistance of 75 °C/W (junction-to-ambient) under standard mounting conditions.
The SMCG30CA-E3/9AT complies with ANSI/IEEE C62.35 surge standards and supports unidirectional/bidirectional configurations within the same SMCG family. It is rated for continuous operation from –55 °C to +150 °C junction temperature and meets JESD201 Class 2 whisker resistance requirements on matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum steady-state reverse voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 33.3 V / 36.8 V - Breakdown occurs within this range at 1.0 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 48.4 V - Clamped voltage during 31.0 A 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 1500 W - Peak transient power handling capability; sustains high-energy surges without failure. |
| TJ max | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments. |
| MSL Level | Level 1 per J-STD-020 - No floor life limitation; compatible with standard reflow profiles up to 260 °C peak. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with 0.310" × 0.400" footprint, UL 94 V-0 molding compound, and cathode/anode terminals symmetrically arranged for bidirectional operation. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical avalanche junction; accepts surge current in either direction. |
| Cathode | Transient current exit (negative polarity) | Second terminal of symmetrical junction; completes bidirectional conduction path with Anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC characteristics in both polarities - eliminates need for orientation-aware layout. |
| Glass-passivated junction | Enhanced long-term stability and leakage control under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, ADAS sensors, and body controllers. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving system-level immunity. |
| Automated placement compatibility | Gull-wing leads with defined coplanarity and solderability per J-STD-002 - supports high-yield SMT assembly. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and 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 TVS clamp placed directly at connector interface to shunt surge energy before it reaches sensitive analog front-ends or communication ICs. Use Value: Limits clamped voltage to 48.4 V during 31 A transients, ensuring compliance with ISO 16750-2 Category III/IV surge immunity requirements. | Use Scenario: Safeguarding digital input/output channels on programmable logic controller (PLC) modules exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 24 V DC I/O lines, mounted adjacent to terminal blocks to minimize inductance in the protection path. Use Value: Delivers 1500 W peak pulse power handling with <1 ns response time, preventing latch-up or permanent damage to microcontroller GPIOs. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station equipment from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS used in conjunction with GDTs or polymer PTCs to provide precise clamping after coarse primary protection. Use Value: Symmetrical 30 V VWM and 48.4 V VC enable balanced differential line protection without skew or common-mode distortion. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Fast-acting clamp across motor terminals or H-bridge outputs to absorb inductive kickback energy. Use Value: Withstands 200 A non-repetitive forward surge (IFSM) and maintains stable clamping performance over 10,000+ surge cycles per JEDEC JESD22-A114. |
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 (DO-214AC) package. | Limited to lower-energy transients; unsuitable for automotive load dump or industrial 2 kV surge testing. | Select SMAJ30CA only for cost-sensitive consumer applications where 1500 W surge capacity is not required. |
| SMCJ30CA | Same VWM (30 V) and VC (48.4 V), identical PPPM (1500 W), but larger SMC (DO-214AB) package with higher thermal mass. | Offers improved thermal derating above 25 °C ambient; requires more PCB area and different pad layout. | Choose SMCJ30CA when extended high-temperature operation (>100 °C ambient) or legacy SMC footprint compatibility is critical. |
Compared with SMAJ30CA and SMCJ30CA, the SMCG30CA-E3/9AT delivers equivalent electrical protection in a lower-profile DO-215AB package optimized for space-constrained automotive and industrial modules, while maintaining AEC-Q101 qualification and MSL Level 1 reflow compatibility.
Availability
SMCG30CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and consumer appliance motor control requiring stable component supply and full traceability.
Supply support for SMCG30CA-E3/9AT 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, precision, and automotive-grade qualification.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments where AEC-Q101 compliance, low clamping voltage, and repeatable surge endurance are mandatory.
FAQ
What is the clamping voltage of SMCG30CA-E3/9AT at its rated peak pulse current?
The SMCG30CA-E3/9AT has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 31.0 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream circuitry. The SMCG30CA-E3/9AT maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMCG30CA-E3/9AT suitable for automotive applications?
Yes, SMCG30CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor interfaces, and body electronics. Its bidirectional symmetry, 1500 W surge rating, and MSL Level 1 reflow compatibility make it appropriate for under-hood and cabin-mounted systems. The SMCG30CA-E3/9AT also meets JESD201 Class 2 whisker resistance and UL 497B recognition for protector classification.
What does the "CA" suffix indicate in SMCG30CA-E3/9AT?
The "CA" suffix in SMCG30CA-E3/9AT denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities - unlike unidirectional variants ending in "A". Electrical characteristics including VBR, VC, and IPPM apply identically in either direction. The SMCG30CA-E3/9AT has no polarity marking on the package, confirming its bidirectional design.
What is the thermal resistance of SMCG30CA-E3/9AT under standard mounting conditions?
The SMCG30CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Its junction-to-lead resistance (RθJL) is 15 °C/W. These values inform thermal derating curves in Figure 2 and define maximum power dissipation limits at elevated ambient temperatures. The SMCG30CA-E3/9AT must be applied within these thermal constraints to ensure reliable operation.
How does the SMCG30CA-E3/9AT differ from the SMCG30A variant?
The SMCG30CA-E3/9AT is bidirectional with symmetrical clamping, whereas SMCG30A is unidirectional and features a cathode band marking. Their VWM (30 V), VBR (33.3–36.8 V), and VC (48.4 V) are identical, but SMCG30A supports forward surge current (IFSM = 200 A) and has different leakage behavior. The SMCG30CA-E3/9AT is intended for AC-coupled or differential signal lines; SMCG30A suits DC power rails where polarity is fixed. Layout and system-level protection strategy must align with this fundamental distinction.
SMCG30CA-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SMCG30CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG30CA-E3/9AT 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-E3/9AT reliable?
The price and inventory of SMCG30CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG30CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG30CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG30CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG30CA-E3/9AT?
SMCG30CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG30CA-E3/9AT 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-E3/9AT?
For technical support, including SMCG30CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG30CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG30CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG30CA-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG30CA-E3/9AT?
All SMCG30CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG30CA-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG30CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG30CA-E3/9AT Tags
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