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Vishay General Semiconductor - Diodes Division SMCG20CA-M3/9AT
- Part No.:
- SMCG20CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG20CA-M3/9AT.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,047
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Product details
Overview
SMCG20CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 22.2 V minimum breakdown voltage (VBR), 20 V standoff voltage (VWM), 1500 W peak pulse power (10/1000 µs), clamping voltage of 32.4 V at 46.3 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG20CA-M3/9AT datasheet, SMCG20CA-M3/9AT pinout, SMCG20CA-M3/9AT application, or SMCG20CA-M3/9AT equivalent, this device serves as a halogen-free, RoHS-compliant, surface-mount TVS for high-energy surge suppression in automotive sensor interfaces, industrial I/O lines, and telecom signal conditioning circuits where bidirectional clamping and low incremental surge resistance are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions - confirmed by specification notes stating "Electrical characteristics apply in both directions" and listing VBR min/max values for both unidirectional and bidirectional variants under the same test conditions (IT = 10 mA). Its glass-passivated junction ensures stable clamping performance under repetitive transients.
The device uses a low-inductance DO-215AB (SMCG) package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, rated MSL Level 1 (260 °C peak reflow), and exhibits RθJA = 75 °C/W and RθJL = 15 °C/W thermal resistance - enabling effective heat dissipation in compact PCB layouts without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 22.2 V / 24.5 V at IT = 10 mA - Confirmed breakdown threshold ensures reliable triggering above normal operating voltage. |
| VC @ IPPM | 32.4 V at 46.3 A (10/1000 µs) - Clamping voltage limits transient energy delivered to downstream components during surge events. |
| PPPM | 1500 W - Peak pulse power handling capacity supports high-energy lightning-induced or inductive-switching transients. |
| IPPM | 46.3 A - Peak surge current capability validated per standardized 10/1000 µs waveform per ANSI/IEEE C62.35. |
| Junction Temp Range | –55 °C to +150 °C - Enables operation in under-hood automotive, industrial control, and outdoor telecom environments. |
| AEC-Q101 Qualified | Yes - Certified for automotive applications including engine control units, ADAS sensors, and body electronics. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded, low-profile package with 8.0 mm × 8.0 mm copper pad layout recommendation for optimal thermal and surge performance. Polarity: unmarked for bidirectional devices; no cathode/anode designation required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal functions identically; symmetrical conduction enables polarity-agnostic placement on PCB. |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal forms a fully reversible clamping path; no orientation dependency during automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware routing in differential or AC-coupled signal paths. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for safety-critical vehicle subsystems. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets global environmental compliance requirements without compromising surge robustness or thermal performance. |
| Low incremental surge resistance | Enables tighter clamping (VC – VBR = 10.2 V) and faster response to fast-rising transients (<1 ps typical junction response). |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning - simplifies manufacturing integration. |
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 placed across signal line and ground to clamp ±200 V transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs while maintaining signal integrity due to low capacitance (<100 pF at 0 V). |
Use Scenario: Shielding digital input/output terminals of programmable logic controllers from inductive kickback and EFT bursts in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing 1500 W surges induced by solenoid switching or relay contact arcing. Use Value: Extends field lifetime of PLC modules by limiting transient voltage to ≤32.4 V, well below 36 V absolute maximum ratings of industrial-grade microcontrollers. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD Suppression |
Use Scenario: Safeguarding Ethernet PHYs, RS-485 transceivers, and DSL line drivers against lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point to shunt >1 kA surge currents before reaching isolation barriers. Use Value: Meets ITU-T K.20/K.21 immunity requirements with verified 1500 W pulse handling and <10 ns response time. |
Use Scenario: Adding secondary-side surge immunity to USB-C PD adapters and wireless charging bases exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp across VBUS/GND to suppress ±15 kV contact discharge per IEC 61000-4-2. Use Value: Maintains USB 3.2 Gen 2 signal integrity (≤0.5 pF added capacitance) while passing Level 4 ESD immunity without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA-E3/57T | Same VWM/VBR specs but SMA (DO-214AC) package; lower PPPM (400 W); RθJA = 110 °C/W. | Limited to lower-energy transients; unsuitable for automotive load-dump or industrial 1500 W surge standards. | Select when cost-sensitive consumer designs require basic ESD/IEC 61000-4-2 protection only. |
| SMCJ20CA-M3/9AT | Same SMCG package and AEC-Q101 qualification, but higher PPPM (3000 W); VC = 32.4 V at 92.6 A. | Overqualified for 1500 W use cases; adds margin for future design scalability or harsher surge environments. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires extended lifetime under repeated transients. |
Compared with SMAJ20CA-E3/57T, SMCG20CA-M3/9AT delivers 275% higher surge power handling and superior thermal management; versus SMCJ20CA-M3/9AT, it offers identical clamping performance at half the peak pulse rating - optimizing cost, board space, and thermal design for mid-tier automotive and industrial applications.
Availability
SMCG20CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCG20CA-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMCG series was developed specifically for AEC-Q101-compliant, high-power transient suppression in space-constrained surface-mount applications - emphasizing low-profile packaging, bidirectional symmetry, and repeatable clamping performance across temperature.
FAQ
What is the clamping voltage of SMCG20CA-M3/9AT at its rated peak pulse current?
The SMCG20CA-M3/9AT has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current (IPPM) of 46.3 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the actual voltage seen by protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMCG20CA-M3/9AT suitable for automotive applications?
Yes, SMCG20CA-M3/9AT is AEC-Q101 qualified and explicitly listed in Vishay's documentation as meeting automotive reliability requirements. Its bidirectional architecture, 1500 W surge rating, –55 °C to +150 °C operating range, and halogen-free M3 construction make it appropriate for engine control units, ADAS camera modules, and body electronics where transient immunity and long-term stability are mandatory.
How does the SMCG (DO-215AB) package compare thermally to SMA (DO-214AC)?
The SMCG (DO-215AB) package used by SMCG20CA-M3/9AT provides significantly better thermal performance than SMA: RθJA = 75 °C/W versus ~110 °C/W for SMA packages. This 32% improvement enables higher sustained power dissipation and greater reliability in high-temperature environments - confirmed by Vishay's thermal characterization curves and recommended 8.0 mm × 8.0 mm copper pad layout.
Does SMCG20CA-M3/9AT have polarity markings on the device body?
No, SMCG20CA-M3/9AT does not feature polarity markings because it is a bidirectional TVS. As stated in the Vishay datasheet: "no marking on bidirectional types." The device functions identically regardless of orientation, allowing flexible PCB placement without concern for anode/cathode alignment - a key advantage over unidirectional variants like SMCG20A-M3/9AT.
What is the maximum reverse leakage current for SMCG20CA-M3/9AT at its standoff voltage?
At its 20 V standoff voltage (VWM), SMCG20CA-M3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 µA at TA = 25 °C. This ultra-low leakage ensures minimal power loss in always-on circuits and prevents false triggering in high-impedance sensor interfaces - a critical parameter verified in the Electrical Characteristics table on page 2 of the Vishay document 88457.
SMCG20CA-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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 46.3A
- 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)
SMCG20CA-M3/9AT FAQ
1.How can I place an order for SMCG20CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG20CA-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 SMCG20CA-M3/9AT reliable?
The price and inventory of SMCG20CA-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 SMCG20CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG20CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG20CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG20CA-M3/9AT?
SMCG20CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG20CA-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 SMCG20CA-M3/9AT?
For technical support, including SMCG20CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG20CA-M3/9AT requirements.
6.How does Aetrix verify that SMCG20CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG20CA-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 SMCG20CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG20CA-M3/9AT?
All SMCG20CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG20CA-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 SMCG20CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG20CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG20CA-M3/9AT Tags
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