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Vishay General Semiconductor - Diodes Division SMCG33CA-E3/9AT
- Part No.:
- SMCG33CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG33CA-E3/9AT.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,569
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Product details
Overview
SMCG33CA-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 33 V stand-off voltage (VWM), 53.3 V clamping voltage (VC) at 28.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCG33CA-E3/9AT datasheet, SMCG33CA-E3/9AT pinout, SMCG33CA-E3/9AT application, or SMCG33CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 reflow compatibility, and verified performance under 10/1000 µs transients in automotive sensor interfaces and industrial I/O circuits.
Technical Context
The SMCG33CA-E3/9AT implements a glass-passivated silicon avalanche junction optimized for fast response (<1 ns) to ESD and lightning-induced transients. Its bidirectional structure enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
It operates across -55 °C to +150 °C junction temperature, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation on standard 8.0 mm × 8.0 mm copper pads per terminal under repetitive surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 36.7 V / 40.6 V - Breakdown occurs within this range at 1 mA test current, ensuring predictable turn-on threshold |
| VC @ IPPM | 53.3 V - Clamped voltage at 28.1 A peak pulse current (10/1000 µs), limiting downstream stress |
| PPPM | 1500 W - Peak transient power handling capability under standardized surge waveform |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage, minimizing standby power loss in high-impedance circuits |
| TJ max. | +150 °C - Maximum junction temperature rating, enabling under-hood automotive deployment |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC specification |
Pinout & Package
Package: SMCG (DO-215AB) - Low-profile surface-mount case with matte tin-plated leads, UL 94 V-0 molding compound, and J-STD-002 solderability compliance. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Accepts surge current during positive voltage excursions; symmetric with cathode for bidirectional operation |
| Cathode | Transient current entry (negative half-cycle) | Accepts surge current during negative voltage excursions; electrically identical to anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or floating lines (e.g., RS-485, CAN, audio) without polarity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on properly laid out PCBs |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles without preconditioning or special handling |
| Glass-passivated junction | Ensures stable breakdown characteristics and long-term reliability under thermal cycling and humidity stress |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting analog outputs of pressure/temperature sensors connected to vehicle ECUs against load-dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±100 V transients before reaching precision ADC front-end. Use Value: Maintains signal integrity by limiting clamped voltage to 53.3 V while surviving 1500 W surges per IEC 61000-4-5. | Use Scenario: Safeguarding differential data lines in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Symmetric suppression on A/B lines of RS-485 transceivers to prevent latch-up and data corruption during EFT bursts. Use Value: Enables uninterrupted communication by clamping both polarities identically with <1 ns response and low dynamic impedance. |
| Consumer Audio Line Driver | Telecom DSL Line Card |
Use Scenario: Shielding line-out amplifiers in smart speakers from ESD events during cable insertion and environmental static discharge. IC Role / Device Role / Timing Role: Fast-acting shunt device across unbalanced audio output to divert >8 kV HBM ESD pulses away from op-amp output stage. Use Value: Prevents audible pop/noise and amplifier damage with 1.0 µA leakage preserving DC bias stability. | Use Scenario: Protecting ADSL/VDSL line drivers from lightning-induced surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: Primary surge limiter on tip/ring inputs upstream of hybrid transformer and line driver IC. Use Value: Absorbs 1500 W transients while maintaining 33 V stand-off to avoid interfering with normal 24–50 V phantom power operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same VWM (33 V) and VC (53.3 V), but lower PPPM (400 W) and DO-214AC (SMA) package | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge requirements are ≤400 W |
| SMCJ33CA | Same VWM (33 V) and higher PPPM (1500 W), but larger DO-214AB (SMC) package and higher RθJA (50 °C/W) | Requires more PCB area and offers inferior thermal performance on small pads | Select when higher surge margin is needed and layout allows larger footprint |
Compared with SMAJ33CA and SMCJ33CA, the SMCG33CA-E3/9AT delivers identical clamping performance at 1500 W in a smaller DO-215AB footprint with better thermal resistance (75 °C/W vs. 50 °C/W for SMCJ) and AEC-Q101 qualification - making it optimal for space-constrained automotive and industrial modules requiring high-reliability surge immunity.
Availability
SMCG33CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, consumer audio interface hardening, and telecom line card surge suppression requiring stable component supply and AEC-Q101 compliance.
Supply support for SMCG33CA-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, efficiency, and application-specific optimization.
The SMCG series is engineered for high-power transient suppression in automotive, industrial, and communications systems where compact size, AEC-Q101 qualification, and consistent bidirectional clamping are critical design requirements.
FAQ
What is the clamping voltage of SMCG33CA-E3/9AT at its rated peak pulse current?
The SMCG33CA-E3/9AT has a maximum clamping voltage (VC) of 53.3 V at 28.1 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value ensures downstream circuitry remains below safe voltage thresholds during surge events, and is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal as specified in the Vishay datasheet.
Is SMCG33CA-E3/9AT suitable for automotive applications?
Yes, SMCG33CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and operation from -55 °C to +150 °C, making it appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh thermal and electrical conditions is mandatory.
How does the bidirectional configuration of SMCG33CA-E3/9AT affect its circuit placement?
The bidirectional configuration of SMCG33CA-E3/9AT eliminates polarity sensitivity, allowing placement across any two points in AC-coupled or floating signal paths - such as RS-485 A/B lines or audio differential outputs - without regard to anode/cathode orientation. Unlike unidirectional TVS diodes, SMCG33CA-E3/9AT has no band marking and provides symmetrical clamping in both directions.
What is the maximum reverse leakage current of SMCG33CA-E3/9AT at its stand-off voltage?
At its 33 V stand-off voltage (VWM), the SMCG33CA-E3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This low leakage preserves signal integrity in high-impedance sensor and communication circuits and minimizes power loss in battery-operated systems where quiescent current is critical.
Does SMCG33CA-E3/9AT require special PCB layout considerations for optimal surge performance?
Yes - optimal performance requires mounting SMCG33CA-E3/9AT on minimum 8.0 mm × 8.0 mm copper pads per terminal, as defined in the Vishay datasheet. Reduced pad area increases thermal resistance and degrades peak pulse power handling. Short, low-inductance traces to ground or protected node are essential to preserve sub-nanosecond response time and minimize voltage overshoot during fast transients.
SMCG33CA-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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 28.1A
- 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)
SMCG33CA-E3/9AT FAQ
1.How can I place an order for SMCG33CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG33CA-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 SMCG33CA-E3/9AT reliable?
The price and inventory of SMCG33CA-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 SMCG33CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG33CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG33CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG33CA-E3/9AT?
SMCG33CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG33CA-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 SMCG33CA-E3/9AT?
For technical support, including SMCG33CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG33CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG33CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG33CA-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 SMCG33CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG33CA-E3/9AT?
All SMCG33CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG33CA-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 SMCG33CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG33CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG33CA-E3/9AT Tags
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