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Vishay General Semiconductor - Diodes Division SMCG33CA-M3/57T
- Part No.:
- SMCG33CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG33CA-M3/57T.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,365
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Product details
Overview
SMCG33CA-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 on signal and power lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), clamping voltage of 53.3 V at 28.1 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCG33CA-M3/57T datasheet, SMCG33CA-M3/57T pinout, SMCG33CA-M3/57T application, or SMCG33CA-M3/57T equivalent, this device is selected for high-reliability transient suppression in automotive sensor interfaces, industrial I/O protection, and telecom line conditioning where bidirectional surge immunity and halogen-free RoHS compliance are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 μA at VWM), while the low incremental surge resistance enables tight clamping during 10/1000 μs transients.
The device is rated for TJ = –55 °C to +150 °C, features MSL Level 1 moisture sensitivity, and delivers 1500 W peak pulse power when mounted on 8.0 mm × 8.0 mm copper pads - validated per JEDEC JESD22-A114 and IEC 61000-4-5 test 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 at IT = 1 mA - guaranteed breakdown window defining turn-on threshold |
| VC @ IPPM | 53.3 V at 28.1 A - clamped voltage during 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient energy absorption capability under standardized waveform |
| ID @ VWM | <1 μA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - extended thermal range supports under-hood automotive and industrial environments |
| Package | SMCG (DO-215AB) - surface-mount gull-wing package with matte tin leads, MSL Level 1 |
Pinout & Package
SMCG33CA-M3/57T uses the SMCG (DO-215AB) package: a compact, low-profile surface-mount case with two gull-wing terminals. Bidirectional construction means no polarity marking; both terminals are functionally identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; symmetrical conduction |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; no functional distinction in bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Halogen-free & RoHS compliant (M3 suffix) | Meets IEC 61249-2-21 and JEDEC J-STD-020; suitable for green manufacturing and export compliance |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during fast transients, protecting 3.3 V/5 V logic and analog front-ends |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly without pre-baking or special handling |
| Glass-passivated junction | Ensures long-term parameter stability and resistance to humidity-induced degradation |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Clamps 1500 W surges to ≤53.3 V while maintaining sub-1 μA leakage - preserving signal fidelity and enabling AEC-Q101-compliant system certification. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced transients (IEC 61000-4-4/5) in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input channels to shunt surge energy before optocoupler or microcontroller input stages. Use Value: Withstands repeated 10/1000 μs surges up to 28.1 A and operates reliably from –55 °C to +150 °C - ensuring uptime in harsh industrial environments. |
| Telecom Line Interface | Power Supply Rail Clamp |
Use Scenario: Transient suppression on Ethernet PHY MDI lines or RS-485 data pairs exposed to lightning-induced surges in outdoor telecom equipment. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed differentially across twisted-pair lines to limit common-mode and differential-mode transients. Use Value: Symmetric VBR and VC ensure balanced clamping behavior, reducing signal distortion and meeting GR-1089-CORE immunity requirements. |
Use Scenario: Secondary-level overvoltage protection on 3.3 V or 5 V DC-DC output rails feeding sensitive processors or memory in embedded gateways. IC Role / Device Role / Timing Role: Fast-response shunt device placed between rail and ground to clamp switching spikes and coupling noise. Use Value: 53.3 V clamping voltage provides ample margin above 33 V VWM - preventing false triggering while delivering full 1500 W surge capacity. |
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 (33 V) and PPPM (400 W), but lower power rating and SMA (DO-214AC) package | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost or board space is critical and 400 W surge capacity suffices |
| SMCJ33CA-M3/57T | Same VWM (33 V) and AEC-Q101 qualification, but higher PPPM (3000 W) and larger SMC (DO-214AB) package | Supports higher-energy threats but requires more PCB area and thermal management | Select when system-level testing demands >1500 W immunity or longer surge duration compliance |
Compared with SMAJ33CA-E3/57T, SMCG33CA-M3/57T offers double the surge power margin and automotive qualification; versus SMCJ33CA-M3/57T, it delivers identical protection level in a 30 % smaller footprint - optimizing space-constrained automotive and industrial PCB layouts.
Availability
SMCG33CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O modules, telecom line conditioning, and DC-DC output rail protection requiring stable component supply and halogen-free compliance.
Supply support for SMCG33CA-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, automotive qualification, and green manufacturing.
The SMCG series is engineered for high-power transient suppression in space-constrained, thermally demanding applications - targeting automotive, industrial, and telecom systems needing AEC-Q101-compliant, bidirectional TVS solutions in low-profile packages.
FAQ
What is the clamping voltage of SMCG33CA-M3/57T and how is it measured?
The SMCG33CA-M3/57T has a maximum clamping voltage (VC) of 53.3 V, measured at a peak pulse current (IPPM) of 28.1 A using the standardized 10/1000 μs double-exponential waveform per IEC 61000-4-5. This value reflects the actual voltage seen by protected circuitry during surge events and is guaranteed across the full operating temperature range.
Is SMCG33CA-M3/57T suitable for automotive applications?
Yes, SMCG33CA-M3/57T is AEC-Q101 qualified and specifically designed for automotive use. Its construction includes glass-passivated junctions, halogen-free materials (M3 suffix), MSL Level 1 reflow compatibility, and operation from –55 °C to +150 °C - meeting requirements for engine control units, ADAS sensors, and body electronics.
How does the bidirectional configuration of SMCG33CA-M3/57T affect its circuit implementation?
The bidirectional configuration of SMCG33CA-M3/57T means both terminals are electrically identical with no polarity marking, allowing placement across any two points needing symmetrical overvoltage protection - such as differential data lines or AC-coupled signals. Unlike unidirectional TVS diodes, SMCG33CA-M3/57T clamps equally in both directions without requiring orientation verification during assembly.
What is the significance of the "M3" suffix in SMCG33CA-M3/57T?
The "M3" suffix in SMCG33CA-M3/57T indicates halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD 201 Class 2 whisker resistance. It also confirms industrial-grade qualification and compliance with UL 94 V-0 flammability standards - distinguishing it from E3 (standard RoHS) and HM3 (AEC-Q101 + halogen-free) variants.
Can SMCG33CA-M3/57T replace SMCG33A-M3/57T in existing designs?
No - SMCG33CA-M3/57T is bidirectional, while SMCG33A-M3/57T is unidirectional. Their VBR and VC values differ significantly: SMCG33A-M3/57T has VBR = 36.7–40.6 V and VC = 53.3 V, but only conducts in one direction and requires correct cathode orientation. Substituting them without circuit review risks failure to clamp negative transients or unintended forward conduction.
SMCG33CA-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):
- 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-M3/57T FAQ
1.How can I place an order for SMCG33CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG33CA-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 SMCG33CA-M3/57T reliable?
The price and inventory of SMCG33CA-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 SMCG33CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG33CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG33CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG33CA-M3/57T?
SMCG33CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG33CA-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 SMCG33CA-M3/57T?
For technical support, including SMCG33CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG33CA-M3/57T requirements.
6.How does Aetrix verify that SMCG33CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG33CA-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 SMCG33CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG33CA-M3/57T?
All SMCG33CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG33CA-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 SMCG33CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCG33CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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