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Vishay General Semiconductor - Diodes Division SMCG20CA-E3/9AT
- Part No.:
- SMCG20CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG20CA-E3/9AT.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,467
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Product details
Overview
SMCG20CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection on signal and power lines. 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-E3/9AT datasheet, SMCG20CA-E3/9AT pinout, SMCG20CA-E3/9AT application, or SMCG20CA-E3/9AT equivalent, this device is selected for robust ESD and lightning surge suppression in automotive sensor interfaces, industrial I/O ports, and telecom line cards where bidirectional clamping, low clamping ratio, and MSL Level 1 solderability are required.
Technical Context
The SMCG20CA-E3/9AT operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable VBR tolerance (±10%) and low leakage (<1.0 µA at VWM), while its low incremental surge resistance enables fast response to sub-100 ns transients.
Thermally, it delivers 6.5 W steady-state power dissipation at TA = 50 °C with RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The DO-215AB package provides mechanical robustness and meets UL 94 V-0 flammability requirements.
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 - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on across production lots. |
| VC @ IPPM | 32.4 V at 46.3 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak surge power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance with margin. |
| ID @ VWM | <1.0 µA - Reverse leakage at rated standoff voltage; minimizes standby power loss and avoids false triggering. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and high-ambient industrial settings. |
| AEC-Q101 | Qualified - Validated for automotive applications per stress test requirements including HTOL, TC, and HTRB. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded case with matte tin-plated terminals, UL 94 V-0 molding compound, and no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional clamping node | Both terminals function identically; no cathode band marking; installed across protected line and ground without orientation concern. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints or external biasing. |
| 1500 W peak pulse power | Withstands repeated 4 kV IEC 61000-4-5 surges when mounted on 8 mm × 8 mm copper pads, reducing need for upstream series impedance. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body electronics, and ADAS sensor modules subject to extended temperature cycling and humidity exposure. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements prior to assembly. |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage over 15+ years in industrial control environments with thermal cycling. |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure sensors from load-dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp ±100 V transients within 1 ns. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V sensor interface ICs by limiting voltage to ≤32.4 V during 46.3 A surge events. |
Use Scenario: Shielding 4–20 mA current-loop inputs in programmable logic controllers against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Primary surge shunt across input terminals, coordinated with series current-limiting resistor and filter capacitor. Use Value: Maintains loop accuracy by adding <1.0 µA leakage at 20 V, while surviving repeated 1 kV/500 Ω surges per IEC 61000-4-5. |
| Telecom Line Interface | Consumer USB Port ESD |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Differential-mode TVS across A/B lines, referenced to local ground, suppressing ±300 V ring-wave surges. Use Value: Achieves clamping ratio of 1.62 (VC/VWM)-lower than unidirectional alternatives-reducing stress on isolated data isolators. |
Use Scenario: Adding secondary-level surge immunity to USB 2.0 D+/D− lines in smart home hubs subjected to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF typical) bidirectional clamp placed after connector, before USB PHY. Use Value: Limits ESD voltage to <32.4 V without distorting 480 Mbps data eye, verified per IEC 61000-4-2 ±15 kV contact discharge. |
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), lower PPPM (400 W), SMA package (DO-214AC), higher RθJA (110 °C/W). | Lower surge rating limits use to consumer-grade I/O; unsuitable for automotive or industrial 4 kV compliance. | Select SMAJ20CA only for cost-sensitive, non-automotive designs with <1 kV surge exposure and space-constrained layouts. |
| SMBJ20CA | Same VWM (20 V), PPPM = 600 W, SMB package (DO-214AA), RθJA = 90 °C/W, no AEC-Q101 qualification. | Lacks automotive qualification and thermal margin for sustained surge duty cycles in engine bay locations. | Choose SMBJ20CA for industrial control panels with moderate surge risk and no AEC-Q101 requirement; verify layout derating. |
Compared with SMAJ20CA and SMBJ20CA, the SMCG20CA-E3/9AT delivers 2.5× and 2.5× higher peak pulse power respectively, combined with AEC-Q101 validation and superior thermal performance-making it the only option qualified for under-hood automotive deployment and high-reliability industrial surge zones.
Availability
SMCG20CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom line interfaces, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for SMCG20CA-E3/9AT 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMCG series was developed specifically for high-power, bidirectional transient suppression in harsh environments-targeting automotive powertrain, industrial automation, and infrastructure equipment where failure modes must be mitigated without compromising signal integrity.
FAQ
What is the clamping voltage of SMCG20CA-E3/9AT at its rated peak pulse current?
The SMCG20CA-E3/9AT has a maximum clamping voltage (VC) of 32.4 V at its peak pulse current (IPPM) of 46.3 A, measured using the standardized 10/1000 µs waveform. This value is critical for ensuring downstream ICs-such as RS-485 transceivers or automotive sensor signal conditioners-are not exposed to damaging overvoltage during surge events. The SMCG20CA-E3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG20CA-E3/9AT suitable for automotive applications?
Yes, SMCG20CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction-glass-passivated junction, DO-215AB package with MSL Level 1 rating, and guaranteed operation from –55 °C to +150 °C-meets stringent automotive reliability requirements. The SMCG20CA-E3/9AT is listed in Vishay's AEC-Q101 qualified product matrix with full test report traceability.
How does the bidirectional nature of SMCG20CA-E3/9AT affect PCB layout?
The SMCG20CA-E3/9AT has no polarity marking and functions identically in both directions, eliminating orientation concerns during placement. PCB layout requires symmetric 8.0 mm × 8.0 mm copper pads per terminal (per Vishay's recommended footprint), with no cathode band alignment needed. This simplifies automated assembly and reduces risk of misorientation-especially valuable in differential signal protection like CAN or RS-485. The SMCG20CA-E3/9AT's symmetrical structure also avoids introducing DC bias or signal distortion in AC-coupled paths.
What is the maximum reverse leakage current for SMCG20CA-E3/9AT at its standoff voltage?
The SMCG20CA-E3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated standoff voltage (VWM) of 20 V and TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance analog circuits and minimizes power loss in battery-operated systems. Leakage remains below 5 µA up to +125 °C, confirming stable performance across automotive and industrial temperature ranges. The SMCG20CA-E3/9AT achieves this via glass passivation and tightly controlled junction processing.
Does SMCG20CA-E3/9AT meet RoHS and halogen-free requirements?
Yes, the "E3" suffix in SMCG20CA-E3/9AT indicates RoHS-compliant, industrial-grade construction with matte tin-plated leads and halogen-free molding compound per IEC 61249-2-21. It satisfies Vishay's material categorization standard (document #99912) and is compatible with lead-free reflow processes peaking at 260 °C. The SMCG20CA-E3/9AT carries no exemptions and is fully compliant with EU RoHS Directive 2011/65/EU and China RoHS II.
SMCG20CA-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SMCG20CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG20CA-E3/9AT 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-E3/9AT reliable?
The price and inventory of SMCG20CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG20CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG20CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG20CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG20CA-E3/9AT?
SMCG20CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG20CA-E3/9AT 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-E3/9AT?
For technical support, including SMCG20CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG20CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG20CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG20CA-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG20CA-E3/9AT?
All SMCG20CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG20CA-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG20CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG20CA-E3/9AT Tags
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