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Vishay General Semiconductor - Diodes Division SMCG20CAHE3/9AT
- Part No.:
- SMCG20CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG20CAHE3/9AT.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,543
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Product details
Overview
SMCG20CAHE3/9AT 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 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 SMCG20CAHE3/9AT datasheet, SMCG20CAHE3/9AT pinout, SMCG20CAHE3/9AT application, or SMCG20CAHE3/9AT equivalent, this device serves as a high-reliability, surface-mount TVS for bidirectional surge suppression in automotive sensor interfaces, industrial I/O ports, and telecom line protection where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical.
Technical Context
The SMCG20CAHE3/9AT operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±10%) and low leakage (<1.0 µA at VWM), while the DO-215AB package supports automated placement and meets UL 94 V-0 flammability requirements.
Thermally, it delivers RθJA = 75 °C/W and RθJL = 15 °C/W, allowing sustained operation up to TJ = 150 °C. The device sustains non-repetitive 8.3 ms surge currents up to 200 A (unidirectional only) and is rated for 1500 W peak pulse power under standardized 10/1000 µs waveform conditions per ANSI/IEEE C62.35.
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 temperature and lot variation. |
| VC @ IPPM | 32.4 V at 46.3 A - Clamped voltage during 10/1000 µs surge; directly limits stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 1500 W - Peak pulse power handling capacity; enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| IPPM | 46.3 A - Maximum surge current supported at rated clamping voltage; determines survivability under defined transient energy. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive deployment and high-ambient industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, and ESD testing; suitable for ASIL-B supporting systems. |
Pinout & Package
Package: SMCG (DO-215AB) - Surface-mount, low-profile gull-wing leaded package with matte tin-plated terminals, UL 94 V-0 molding compound, and MSL Level 1 rating (peak reflow 260 °C). No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical avalanche junction; conducts during positive overvoltage events relative to cathode reference. |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical junction; conducts during negative overvoltage events - functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without external polarity management. |
| AEC-Q101 qualification | Validates long-term reliability under automotive thermal cycling, humidity, and vibration stresses - no additional qualification needed for Tier 1 designs. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients by reducing dynamic impedance above VBR, improving clamping precision. |
| MSL Level 1 rating | Allows unlimited floor life and standard SMT reflow without baking - reduces manufacturing overhead and moisture-related defects. |
| Glass passivated junction | Ensures stable electrical parameters over time and temperature, with reduced sensitivity to environmental contamination or mechanical stress. |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±200 V transients before they reach signal conditioning circuitry. Use Value: Limits clamped voltage to ≤32.4 V, preventing damage to 3.3 V/5 V microcontrollers and ensuring ASIL-B compliance via AEC-Q101 validation. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges (e.g., relay coil kickback, lightning-induced coupling on 24 V DC lines). IC Role / Device Role / Timing Role: Primary front-end surge suppressor on each channel, mounted directly at terminal block to minimize inductance. Use Value: Absorbs 1500 W pulses without degradation, maintaining <1 µA leakage at 20 V to avoid false triggering in high-impedance sensing circuits. |
| Telecom Line Interface | Consumer USB/Display Port ESD |
Use Scenario: Shielding RS-485/RS-422 data lines in base station backhaul equipment exposed to induced surges from nearby power lines or antenna coupling. IC Role / Device Role / Timing Role: Differential-mode TVS across twisted-pair lines, leveraging symmetrical clamping to preserve signal integrity during bipolar transients. Use Value: Achieves <1 ns response time and 32.4 V clamping, keeping differential swing within receiver common-mode range during 10/1000 µs surges. | Use Scenario: Secondary-level surge protection on USB 2.0 or DisplayPort auxiliary channels in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) bidirectional clamp placed after primary ESD diodes to handle higher-energy events. Use Value: Provides 1500 W surge margin beyond IEC 61000-4-2 ESD immunity, extending system-level robustness to ISO 7637-2 pulse 1/2/5a. |
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 PPPM (400 W), but lower surge rating (22.5 A IPPM); SMA package (DO-214AC), larger footprint than SMCG. | Limited to lower-energy transients (IEC 61000-4-5 Level 2); not AEC-Q101 qualified. | Select when cost sensitivity outweighs automotive qualification and surge margin requirements. |
| 1.5KE20CA | Higher PPPM (1500 W) and same VWM, but axial DO-15 package; no SMT compatibility; higher RθJA (~100 °C/W). | Requires through-hole assembly; unsuitable for high-density PCBs or automated SMT lines. | Choose only for legacy through-hole designs where board real estate and reflow compatibility are not constraints. |
Compared with SMAJ20CA and 1.5KE20CA, the SMCG20CAHE3/9AT uniquely combines AEC-Q101 qualification, DO-215AB SMT compatibility, and 1500 W surge capability in a low-profile package-enabling automotive-grade protection without layout or process compromise.
Availability
SMCG20CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom data line protection, and consumer display interface designs requiring stable component supply and full traceability.
Supply support for SMCG20CAHE3/9AT 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, efficiency, and application-specific optimization.
The SMCG series targets high-surge, space-constrained applications demanding AEC-Q101 validation and MSL Level 1 process compatibility - engineered specifically for automotive and industrial systems where failure modes must be rigorously controlled.
FAQ
What is the polarity configuration of SMCG20CAHE3/9AT?
The SMCG20CAHE3/9AT is a bidirectional TVS diode with symmetrical avalanche characteristics in both directions. It has no polarity marking on the package, and its breakdown and clamping behavior are identical for positive and negative transients - making it ideal for protecting AC-coupled or differential signal paths without orientation concerns. This distinguishes it from unidirectional variants like SMCG20A, which feature a cathode band.
Is SMCG20CAHE3/9AT suitable for automotive applications?
Yes, SMCG20CAHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, matte tin-plated leads compliant with J-STD-002, and MSL Level 1 reflow capability - all validated per automotive reliability standards. It is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces where transient immunity and long-term stability are mandatory.
What is the clamping voltage of SMCG20CAHE3/9AT under surge conditions?
The SMCG20CAHE3/9AT clamps to a maximum of 32.4 V at its rated peak pulse current of 46.3 A (10/1000 µs waveform). This clamping voltage is measured across the device terminals during standardized surge testing and represents the upper limit of voltage imposed on protected circuitry - critical for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream.
Does SMCG20CAHE3/9AT require a heatsink for normal operation?
No, SMCG20CAHE3/9AT is designed for operation without an external heatsink under typical surge duty cycles. Its thermal resistance is specified as RθJA = 75 °C/W on standard 0.31" × 0.31" copper pads, and its 6.5 W steady-state power dissipation rating applies at TA = 50 °C. For repetitive surge events or elevated ambient temperatures, PCB copper area optimization is recommended instead of discrete heatsinking.
How does the HE3 suffix affect SMCG20CAHE3/9AT's specifications?
HE3 denotes RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads and JESD 201 Class 2 whisker resistance. It does not alter electrical parameters - VWM, VBR, PPPM, and clamping remain identical to non-HE3 variants. The suffix confirms compliance with automotive reliability and environmental standards, distinguishing it from industrial-grade E3 or halogen-free HM3 versions.
SMCG20CAHE3/9AT 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG20CAHE3/9AT FAQ
1.How can I place an order for SMCG20CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG20CAHE3/9AT 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 SMCG20CAHE3/9AT reliable?
The price and inventory of SMCG20CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG20CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG20CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG20CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG20CAHE3/9AT?
SMCG20CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG20CAHE3/9AT 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 SMCG20CAHE3/9AT?
For technical support, including SMCG20CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG20CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG20CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG20CAHE3/9AT 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 SMCG20CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG20CAHE3/9AT?
All SMCG20CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG20CAHE3/9AT, 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 SMCG20CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG20CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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