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Vishay General Semiconductor - Diodes Division SMCG20CA-M3/57T
- Part No.:
- SMCG20CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG20CA-M3/57T.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,112
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Product details
Overview
SMCG20CA-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 of sensitive electronics. It features a 22.2 V minimum breakdown voltage (VBR), 20 V working peak reverse 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-M3/57T datasheet, SMCG20CA-M3/57T pinout, SMCG20CA-M3/57T application, or SMCG20CA-M3/57T equivalent, this device is selected for high-energy surge suppression in automotive sensor interfaces, industrial I/O lines, and DC power rail protection where low clamping ratio, fast response (<1 ns), and halogen-free RoHS compliance are required.
Technical Context
The SMCG20CA-M3/57T operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection against voltage transients regardless of polarity-critical for AC-coupled signal lines and ungrounded systems. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repeated surge stress.
Thermal design is supported by a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W on standard 8.0 mm × 8.0 mm copper pads. It meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating window for 24 V nominal systems. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Ensures reliable triggering above system operating voltage while maintaining margin against false triggering. |
| VC @ IPPM | 32.4 V at 46.3 A - Clamping voltage during 1500 W surge; limits protected circuit voltage to safe levels during worst-case transients. |
| PPPM | 1500 W (10/1000 µs) - Sustains high-energy surges common in automotive load-dump and inductive switching events. |
| IPPM | 46.3 A - Peak surge current capability directly determines survivability under ISO 7637-2 Pulse 5a/b conditions. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing package optimized for automated placement and high thermal dissipation via exposed leads. |
Pinout & Package
SMCG20CA-M3/57T uses the SMCG (DO-215AB) surface-mount package: gull-wing leads, no polarity marking (bidirectional), matte tin-plated terminals compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional conduction path | No polarity designation; either terminal serves as anode or cathode depending on transient polarity-enables single-device protection of floating or AC-coupled nodes. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics requiring zero-failure field reliability. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets global environmental regulations and enables use in green manufacturing without compromising surge performance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, lightning-induced surges), improving protection margin. |
| MSL Level 1 rating | Allows unlimited floor life and supports standard lead-free reflow profiles up to 260 °C peak without baking. |
| Glass passivated junction | Provides stable leakage current (<1.0 µA at VWM) and long-term parameter stability across temperature and humidity stress. |
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 jump-start transients in 12 V/24 V vehicle systems. IC Role / Device Role: Bidirectional clamping element placed at connector interface to shunt surge energy before it reaches downstream ICs. Use Value: Withstands ISO 7637-2 Pulse 5a (75 V/300 ms) and Pulse 1 (−150 V/50 ms) without degradation, preserving signal integrity and system uptime. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against induced surges from relay coil switching and motor drive noise. IC Role / Device Role: Primary overvoltage clamp on 24 V DC field wiring, mounted adjacent to terminal block for shortest possible transient path. Use Value: 1500 W peak power rating absorbs repetitive 10/1000 µs surges up to 46.3 A, extending module service life in factory automation environments. |
| DC Power Rail Protection | Telecom Interface Protection |
|
Use Scenario: Guarding 24 V auxiliary power rails in telecom base stations and network switches against lightning-induced surges entering via external cabling. IC Role / Device Role: Secondary-level TVS placed after primary MOV/GDT stages to provide precise low-clamp protection for downstream DC-DC converters and PMICs. Use Value: 32.4 V clamping voltage ensures protected ICs remain below absolute maximum ratings even during 1500 W surge events. |
Use Scenario: Protecting RS-485/RS-232 data lines in outdoor telecom cabinets exposed to electrostatic discharge and induced surges from nearby lightning strikes. IC Role / Device Role: Bidirectional transient suppressor bridging differential pair or line-to-ground, leveraging symmetrical VBR for balanced protection. Use Value: Sub-1 ns response time captures fast ESD events (IEC 61000-4-2 ±8 kV contact), preventing latch-up or damage to transceiver ICs. |
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 | Same VWM (20 V) and bidirectional configuration, but lower PPPM (400 W) and higher VC (32.4 V → 34.0 V); SMA package (DO-214AC), smaller footprint. | Limited to lower-energy transients (e.g., IEC 61000-4-5 Level 3); unsuitable for automotive load-dump or industrial 1500 W requirements. | Select SMAJ20CA only when board space is constrained and surge energy is limited to <400 W. |
| SMCJ20CA | Identical VWM (20 V), VBR, and PPPM (1500 W), but in larger SMC (DO-214AB) package; slightly higher RθJA (85 °C/W vs. 75 °C/W). | Compatible with same surge standards but requires more PCB area; less suitable for dense automotive modules. | Choose SMCJ20CA if existing layout uses SMC footprints or thermal management allows higher RθJA. |
Compared with SMAJ20CA and SMCJ20CA, SMCG20CA-M3/57T delivers identical 1500 W surge capability in a smaller DO-215AB footprint with superior thermal performance (RθJA = 75 °C/W) and AEC-Q101 qualification-making it optimal for space-constrained, high-reliability automotive and industrial designs.
Availability
SMCG20CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom DC power rail protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMCG20CA-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, efficiency, and application-specific optimization.
The SMCG series is engineered for high-power transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and consistent clamping performance are critical.
FAQ
What is the clamping voltage of SMCG20CA-M3/57T at its rated peak pulse current?
The SMCG20CA-M3/57T has a maximum clamping voltage (VC) of 32.4 V at its peak pulse current (IPPM) of 46.3 A, measured under the standardized 10/1000 µs waveform. This value ensures downstream components remain within safe operating voltage limits during high-energy transients. The clamping performance is verified across temperature and production lots per Vishay's qualification testing for the SMCG20CA-M3/57T.
Is SMCG20CA-M3/57T suitable for automotive applications?
Yes, SMCG20CA-M3/57T is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, ADAS sensor interfaces, and body electronics. Its bidirectional architecture, 1500 W surge rating, and operation up to +150 °C junction temperature meet stringent automotive transient immunity requirements such as ISO 7637-2 and ISO 16750-2. The M3 suffix confirms halogen-free, RoHS-compliant construction required by Tier 1 suppliers for SMCG20CA-M3/57T.
What does the "M3" suffix mean in SMCG20CA-M3/57T?
The "M3" suffix in SMCG20CA-M3/57T indicates halogen-free, RoHS-compliant construction with industrial-grade reliability and JESD 201 Class 2 whisker resistance. It distinguishes this variant from E3 (standard RoHS) and HM3 (AEC-Q101 + halogen-free). All M3 variants-including SMCG20CA-M3/57T-use matte tin-plated leads and meet UL 94 V-0 flammability standards for the molding compound.
How does SMCG20CA-M3/57T differ from unidirectional SMCG20A-M3/57T?
SMCG20CA-M3/57T is bidirectional with symmetrical breakdown and clamping in both polarities, while SMCG20A-M3/57T is unidirectional with cathode marking and forward conduction capability. The "CA" suffix explicitly denotes bidirectional operation, making SMCG20CA-M3/57T appropriate for AC-coupled lines, floating grounds, or differential signaling where polarity is undefined-unlike SMCG20A-M3/57T, which is used only in DC circuits with defined polarity.
What is the thermal resistance specification for SMCG20CA-M3/57T?
SMCG20CA-M3/57T has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. These values are measured under standardized conditions and enable accurate thermal modeling for PCB layout-especially important for sustained surge duty cycles. The RθJA of SMCG20CA-M3/57T is lower than SMC-packaged alternatives, supporting higher power density in compact designs.
SMCG20CA-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):
- 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-M3/57T FAQ
1.How can I place an order for SMCG20CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG20CA-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 SMCG20CA-M3/57T reliable?
The price and inventory of SMCG20CA-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 SMCG20CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG20CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG20CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG20CA-M3/57T?
SMCG20CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG20CA-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 SMCG20CA-M3/57T?
For technical support, including SMCG20CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG20CA-M3/57T requirements.
6.How does Aetrix verify that SMCG20CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG20CA-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 SMCG20CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG20CA-M3/57T?
All SMCG20CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG20CA-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 SMCG20CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCG20CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG20CA-M3/57T Tags
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