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Vishay General Semiconductor - Diodes Division SMCG33CA-E3/57T
- Part No.:
- SMCG33CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG33CA-E3/57T.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,767
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Product details
Overview
SMCG33CA-E3/57T 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 standoff voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 53.3 V at 28.1 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCG33CA-E3/57T datasheet, SMCG33CA-E3/57T pinout, SMCG33CA-E3/57T application, or SMCG33CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.4), MSL Level 1 reflow compatibility, RoHS-compliant matte tin terminations, and suitability for CAN bus, LIN, sensor I/O, and automotive body electronics protection.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism to shunt surge current away from downstream circuitry. Its bidirectional structure ensures symmetrical clamping in both polarities, with identical VBR min/max (36.7 V / 40.6 V) and VC (53.3 V) in either direction - critical for AC-coupled or floating interfaces.
The SMCG33CA-E3/57T delivers fast response (<1 ns), low incremental surge resistance, and stable performance across -55 °C to +150 °C junction temperature. Its DO-215AB package provides high thermal dissipation (RθJL = 15 °C/W) and meets UL 94 V-0 flammability, supporting reliable operation under repetitive surge stress in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - tight breakdown window ensures predictable turn-on threshold |
| VC @ IPPM | 53.3 V at 28.1 A - clamping voltage limits protected circuit stress during 10/1000 µs surge |
| PPPM | 1500 W - peak transient power handling capability per standard waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables deployment in under-hood automotive and industrial ambient conditions |
| AEC-Q101 | Qualified - validated for automotive reliability including HTOL, TC, and ESD testing |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing package with 2 terminals; UL 94 V-0 molding compound; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Acts as cathode during positive transients; no polarity marking on device body |
| Cathode | Transient current sink (bidirectional) | Acts as anode during negative transients; symmetric conduction eliminates orientation dependency |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR and VC in both directions - simplifies layout for AC or floating lines without polarity concerns |
| Low clamping ratio (VC/VBR) | ~1.4 - minimizes voltage overshoot during surge, reducing risk of downstream IC latch-up or damage |
| AEC-Q101 qualification | Validated for automotive-grade reliability - supports use in body control modules, ADAS sensors, and infotainment I/O |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - enables standard SMT assembly without moisture sensitivity handling |
| Glass passivated junction | Enhances long-term stability and surge endurance - maintains parameter consistency after repeated transient events |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair against ISO 7637-2 load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair to clamp common-mode surges while preserving signal integrity. Use Value: Clamps transients to ≤53.3 V within nanoseconds, preventing CAN transceiver damage without adding capacitance-induced timing skew. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Standoff-rated protector on sensor output line, absorbing inductive kickback from solenoid switching nearby. Use Value: 33 V VWM matches typical industrial supply rails; 1500 W PPPM handles repetitive 200 A surge events per IEC 61000-4-5. |
| Automotive LIN Bus Nodes | Consumer Electronics USB/UART I/O |
Use Scenario: Overvoltage protection for LIN slave nodes (e.g., door modules, seat controls) exposed to battery transients. IC Role / Device Role / Timing Role: Bidirectional clamp on LIN bus line referenced to battery, suppressing ±100 V pulses per ISO 16750-2. Use Value: AEC-Q101 qualification and -55 °C to +150 °C operation ensure compliance with automotive environmental requirements. | Use Scenario: ESD and surge protection for UART debug ports or USB VBUS lines in smart home hubs and portable devices. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS placed at connector entry point to prevent latch-up in microcontroller GPIOs. Use Value: Sub-1 ns response and 53.3 V clamping protect 3.3 V/5 V logic without requiring series impedance or additional filtering. |
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-E3/57T | Same VWM/VBR/VC specs but SMA (DO-214AC) package; lower PPPM (400 W); RθJA = 110 °C/W vs. 75 °C/W | Limited to lower-energy transients; less suitable for automotive load dump where 1500 W is required | Select SMCG33CA-E3/57T when higher surge rating, better thermal performance, or AEC-Q101 validation is mandatory |
| 1.5KE33CA | Through-hole (DO-201AD); same VWM/VBR but higher VC (53.3 V → 55.1 V); 1500 W rating; no AEC-Q101 qualification | Requires PCB through-hole real estate; not qualified for automotive electronics production | Choose SMCG33CA-E3/57T for surface-mount scalability, automated assembly, and automotive compliance |
Compared with SMAJ33CA-E3/57T and 1.5KE33CA, the SMCG33CA-E3/57T offers superior thermal performance (RθJL = 15 °C/W), AEC-Q101 qualification, and DO-215AB packaging optimized for high-reliability SMT production - making it the preferred choice for automotive and industrial designs demanding repeatable surge immunity.
Availability
SMCG33CA-E3/57T is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer device I/O protection requiring stable component supply, AEC-Q101 compliance, and high-surge resilience.
Supply support for SMCG33CA-E3/57T 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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in automotive, industrial, and communications infrastructure where robustness and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMCG33CA-E3/57T and how is it measured?
The SMCG33CA-E3/57T has a maximum clamping voltage (VC) of 53.3 V, measured at its peak pulse current (IPPM) of 28.1 A under the standardized 10/1000 µs double-exponential surge waveform. This value reflects the actual voltage seen by protected circuitry during worst-case transient events and is guaranteed across the full operating temperature range.
Is SMCG33CA-E3/57T suitable for automotive applications?
Yes, SMCG33CA-E3/57T is AEC-Q101 qualified and rated for junction temperatures from -55 °C to +150 °C. Its bidirectional symmetry, 1500 W surge rating, and DO-215AB package make it appropriate for CAN/LIN bus protection, body control modules, and other automotive subsystems requiring certified transient immunity.
Does SMCG33CA-E3/57T have polarity markings?
No - SMCG33CA-E3/57T is a bidirectional TVS diode and carries no cathode band or polarity marking. Its symmetrical construction allows installation in either orientation, eliminating orientation errors during automated placement and simplifying PCB design for differential or floating lines.
What is the leakage current specification for SMCG33CA-E3/57T at its standoff voltage?
At its 33 V standoff voltage (VWM), the SMCG33CA-E3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage ensures minimal loading on high-impedance sensor outputs and communication lines, preserving signal fidelity and power efficiency.
What package type and mounting compatibility does SMCG33CA-E3/57T use?
SMCG33CA-E3/57T uses the SMCG (DO-215AB) surface-mount package with gull-wing leads. It is MSL Level 1 rated for reflow up to 260 °C, compatible with standard SMT processes, and features matte tin-plated terminations meeting J-STD-002 solderability requirements.
SMCG33CA-E3/57T 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):
- 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-E3/57T FAQ
1.How can I place an order for SMCG33CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG33CA-E3/57T 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 SMCG33CA-E3/57T reliable?
The price and inventory of SMCG33CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG33CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG33CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG33CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG33CA-E3/57T?
SMCG33CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG33CA-E3/57T 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 SMCG33CA-E3/57T?
For technical support, including SMCG33CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG33CA-E3/57T requirements.
6.How does Aetrix verify that SMCG33CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG33CA-E3/57T 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 SMCG33CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG33CA-E3/57T?
All SMCG33CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG33CA-E3/57T, 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 SMCG33CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG33CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG33CA-E3/57T Tags
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