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Vishay General Semiconductor - Diodes Division SMCG20CA-E3/57T
- Part No.:
- SMCG20CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG20CA-E3/57T.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,992
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Product details
Overview
SMCG20CA-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 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 use.
For engineers reviewing the SMCG20CA-E3/57T datasheet, SMCG20CA-E3/57T pinout, SMCG20CA-E3/57T application, or SMCG20CA-E3/57T equivalent, key selection criteria include bidirectional clamping performance, low clamping ratio (VC/VWM = 1.62), MSL Level 1 reflow compatibility, 150 °C max junction temperature, and suitability for CAN/LIN bus line protection, sensor interface surge hardening, and 12 V automotive power rail suppression.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism with glass-passivated junction for stable, repeatable response. Its bidirectional symmetry ensures identical clamping in both polarities, eliminating polarity concerns in AC-coupled or differential signal paths.
Designed for high-energy surge immunity per IEC 61000-4-5 (10/1000 µs waveform), it delivers 46.3 A peak pulse current (IPPM) while maintaining low incremental surge resistance and fast sub-nanosecond response-critical for protecting MOSFET gates, microcontroller I/O, and analog front-ends against ESD and load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe operating margin below clamping threshold |
| VBR (min) | 22.2 V - Minimum breakdown voltage at 1 mA test current; guarantees conduction onset above normal system voltage |
| VC @ IPPM | 32.4 V - Clamped voltage at 46.3 A peak pulse; determines maximum stress imposed on protected downstream circuitry |
| PPPM | 1500 W - Peak pulse power handling (10/1000 µs); enables compliance with ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5 Level 4 |
| IPPM | 46.3 A - Peak pulse current capability; sets maximum surge energy absorption without degradation |
| TJ max | 150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures |
| MSL Level | Level 1 (J-STD-020) - Allows unlimited floor life and standard reflow up to 260 °C peak; simplifies SMT manufacturing |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded case with 8.0 mm × 8.0 mm copper pad layout recommendation; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | One terminal of symmetrical avalanche junction; no polarity marking; connects to protected line or ground reference |
| Cathode | Transient current sink (bidirectional) | Second terminal of symmetrical avalanche junction; functionally identical to Anode; forms bidirectional clamping path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress requirements |
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %), low leakage (<1 µA at VWM), and long-term parameter stability under thermal stress |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs-critical for 3.3 V/5 V logic interfaces and precision analog sensors |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and enables compatibility with standard lead-free reflow profiles without baking |
| 1500 W peak pulse power | Supports robust protection against severe transients such as ISO 7637-2 Load Dump (Pulse 5a) in 12 V systems |
Applications
| Automotive Power Rail Protection | CAN Bus Line Protection |
|---|---|
Use Scenario: Suppressing load dump transients (up to 60 V, 400 ms) on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between power rail and chassis ground to limit rail voltage excursion during alternator field decay. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and PMICs by limiting rail voltage to ≤32.4 V during 46.3 A surges. | Use Scenario: Protecting CANH/CANL differential pair from ESD (IEC 61000-4-2 ±8 kV contact) and coupled transients in vehicle networks. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS connected across CANH–CANL to shunt common-mode surges without distorting signal integrity. Use Value: Maintains CAN signal fidelity (≤100 pF typical junction capacitance) while clamping differential spikes to <35 V-within ISO 11898-2 fault tolerance limits. |
| Sensor Interface Surge Hardening | Industrial I/O Module Protection |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors from inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Bidirectional clamp mounted at connector entry point to divert fast-rising transients (tr < 1 ns) before reaching precision DAC/ADC circuitry. Use Value: Limits voltage seen by op-amp input stages to ≤32.4 V, preventing input stage saturation or ESD-induced gate oxide rupture in instrumentation amplifiers. | Use Scenario: Safeguarding digital I/O channels (RS-485, discrete inputs) in PLC backplanes exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge suppression element placed upstream of TVS arrays or polymeric PTCs to absorb bulk energy before secondary protection engages. Use Value: Handles up to 1500 W transient energy, reducing stress on downstream components and extending system-level surge withstand capability to IEC 61000-4-5 Level 4 (4 kV line-earth). |
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 (32.5 V); SMA (DO-214AC) package with smaller pad area | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); not suitable for ISO 7637-2 Pulse 5a load dump | Select when board space is constrained and surge energy is ≤400 W; verify thermal derating on reduced copper area |
| SMBJ20CA | Same VWM and bidirectional design, PPPM = 600 W, VC = 32.4 V; SMB (DO-214AA) package with intermediate thermal mass | Acceptable for moderate automotive transients (ISO 7637-2 Pulse 1/2), but insufficient for full load dump duty cycle | Choose for cost-sensitive industrial controls where 600 W peak power suffices and DO-214AA footprint is preferred |
Compared with SMAJ20CA and SMBJ20CA, SMCG20CA-E3/57T provides 2.5× and 1.5× higher peak pulse power respectively, enabling single-device compliance with stringent automotive load dump requirements while maintaining identical clamping voltage and AEC-Q101 qualification-reducing BOM count and validation effort.
Availability
SMCG20CA-E3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, CAN/LIN bus nodes, and 12 V power distribution systems requiring stable component supply with AEC-Q101 assurance and full production traceability.
Supply support for SMCG20CA-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, power efficiency, and automotive qualification.
The SMCG series was engineered specifically for high-energy transient suppression in harsh automotive and industrial environments, combining AEC-Q101 compliance, DO-215AB mechanical robustness, and optimized clamping performance for 12 V and 24 V systems.
FAQ
What is the breakdown voltage range for SMCG20CA-E3/57T?
The SMCG20CA-E3/57T has a minimum breakdown voltage (VBR) of 22.2 V and a maximum of 24.5 V at 1 mA test current, per Vishay Document Number 88457. This 5 % tolerance ensures consistent clamping onset across production lots and supports reliable design margining against 20 V standoff voltage.
Is SMCG20CA-E3/57T suitable for automotive applications?
Yes, SMCG20CA-E3/57T is AEC-Q101 qualified and rated for operating junction temperatures from –55 °C to +150 °C. Its construction-including glass-passivated junction, MSL Level 1 reflow compatibility, and 1500 W surge capability-meets requirements for engine control, body electronics, and infotainment systems per ISO 7637-2 and ISO 16750-2.
What is the clamping voltage of SMCG20CA-E3/57T at its rated peak pulse current?
At its rated peak pulse current of 46.3 A (10/1000 µs waveform), SMCG20CA-E3/57T clamps to a maximum of 32.4 V. This value is specified in the Electrical Characteristics table of the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does SMCG20CA-E3/57T have polarity markings on the package?
No, SMCG20CA-E3/57T is a bidirectional TVS diode and carries no polarity marking on the SMCG (DO-215AB) case. Unlike unidirectional variants, it functions identically in either orientation-making it ideal for differential signal lines like CAN, LIN, or RS-485 where polarity assignment is undefined or reversible.
What is the thermal resistance of SMCG20CA-E3/57T from junction to ambient?
The typical junction-to-ambient thermal resistance (RθJA) of SMCG20CA-E3/57T is 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is critical for calculating steady-state power dissipation limits in high-temperature environments.
SMCG20CA-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):
- 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-E3/57T FAQ
1.How can I place an order for SMCG20CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG20CA-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 SMCG20CA-E3/57T reliable?
The price and inventory of SMCG20CA-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 SMCG20CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG20CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG20CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG20CA-E3/57T?
SMCG20CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG20CA-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 SMCG20CA-E3/57T?
For technical support, including SMCG20CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG20CA-E3/57T requirements.
6.How does Aetrix verify that SMCG20CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG20CA-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 SMCG20CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG20CA-E3/57T?
All SMCG20CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG20CA-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 SMCG20CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG20CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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