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Vishay General Semiconductor - Diodes Division SMCG24CA-E3/9AT
- Part No.:
- SMCG24CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG24CA-E3/9AT.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,710
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Product details
Overview
SMCG24CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for robust overvoltage protection of signal and power lines. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 38.9 V at 38.6 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG24CA-E3/9AT datasheet, SMCG24CA-E3/9AT pinout, SMCG24CA-E3/9AT application, or SMCG24CA-E3/9AT equivalent, this device is selected for high-energy transient suppression in automotive sensor interfaces, industrial I/O ports, and DC power rail protection where bidirectional surge immunity, low clamping ratio, and MSL Level 1 reflow compatibility are critical.
Technical Context
The SMCG24CA-E3/9AT operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Designed for 10/1000 µs waveform compliance, it delivers 38.9 V clamping at 38.6 A peak pulse current while maintaining ≤1.0 µA reverse leakage at 24 V, and exhibits 75 °C/W junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads - critical for thermal management in compact automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin for 24 V nominal systems. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Tight breakdown window ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 38.9 V at 38.6 A - Clamping voltage limits downstream IC stress to safe levels during 1500 W surges. |
| PPPM | 1500 W (10/1000 µs) - High energy-handling capacity suitable for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 threats. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on automotive modules. |
| TJ max | +150 °C - Enables operation in under-hood environments and high-power density designs. |
| Package | SMCG (DO-215AB) - Low-profile SMD outline compatible with automated placement and meets UL 94 V-0 flammability. |
Pinout & Package
SMCG24CA-E3/9AT uses the SMCG (DO-215AB) surface-mount package: a dual-leaded, gull-wing configuration with no polarity marking (bidirectional). Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminals | No functional distinction between leads; either terminal serves as anode or cathode depending on transient polarity - eliminates orientation errors during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture-induced damage - no bake required prior to assembly. |
| Glass-passivated junction | Ensures stable electrical parameters over temperature and lifetime, with minimal parameter drift after 1000 surge cycles. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ≈ 1.45) versus standard TVS diodes, reducing protected circuit voltage overshoot. |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for automotive and industrial enclosures without additional conformal coating. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector or IC input pins to shunt ESD and surge energy before reaching sensitive analog front-ends. Use Value: Maintains signal fidelity with ≤1.0 µA leakage at 24 V and clamps 38.9 V during 38.6 A surges - preserving ADC accuracy and preventing false triggers. |
Use Scenario: Safeguarding two-wire CAN FD physical layer against ISO 11898-2 fast transients and EFT bursts in factory automation controllers. IC Role / Device Role / Timing Role: Symmetrical TVS across CANH/CANL differential pair to suppress common-mode and differential-mode surges without disrupting bus biasing. Use Value: 24 V VWM aligns with 24 V industrial supply rails; 1500 W PPPM withstands repeated 1 kV/50 Ω surge events per IEC 61000-4-5. |
| DC Power Rail Protection | Telecom Line Interface |
|
Use Scenario: Guarding 24 V DC input stages of PoE-powered switches, motor drivers, and PLC I/O modules against lightning-induced surges and hot-swap spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp mounted upstream of input filter capacitors and DC-DC converters to absorb energy before downstream components. Use Value: 38.9 V clamping voltage ensures MOSFET gate drivers and controller ICs remain within absolute maximum ratings during 10/1000 µs transients. |
Use Scenario: Protecting Ethernet PHY interfaces and RS-485 transceivers in telecom base station backplanes exposed to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional TVS on differential data lines (e.g., TX+/TX−) to limit common-mode voltage excursions without distorting signal edges. Use Value: Fast response time (<1 ns) and low capacitance (<100 pF at 0 V) prevent signal degradation at 100 Mbps+ data rates while meeting GR-1089-CORE Level 3 immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Same VWM (24 V) and bidirectional function, but lower PPPM (400 W) and higher VC (43.5 V at 9.2 A); SMA (DO-214AC) package with larger footprint and higher RθJA (110 °C/W). | Limited to lower-energy transients (IEC 61000-4-2 ±8 kV contact only); unsuitable for ISO 7637-2 Pulse 5a or high-current load dump. | Select SMAJ24CA only for cost-sensitive consumer applications with <500 W surge requirements and relaxed thermal constraints. |
| 1.5KE24CA | Higher PPPM (1500 W) but axial-leaded DO-201 package; not SMD-compatible, lacks AEC-Q101 qualification, and has slower response due to lead inductance. | Requires through-hole assembly and manual rework; incompatible with automated SMT lines and automotive vibration environments. | Choose 1.5KE24CA only for legacy prototyping or non-automotive bench testing where board space and reflow compatibility are not constraints. |
Compared with SMAJ24CA and 1.5KE24CA, SMCG24CA-E3/9AT uniquely combines automotive qualification, SMD gull-wing geometry, MSL Level 1 compatibility, and 1500 W capability in a low-profile package - making it the only option for production-grade 24 V automotive and industrial SMT designs requiring zero-orientation assembly and high-reliability surge immunity.
Availability
SMCG24CA-E3/9AT is available at Aetrix Electronics and suitable for automotive ECU protection, industrial CAN bus interfaces, and 24 V DC power rail safeguarding requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG24CA-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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The SMCG series was developed specifically for AEC-Q101-compliant, high-energy transient suppression in space-constrained automotive and industrial PCBs - emphasizing low clamping ratio, MSL-1 reflow readiness, and bidirectional symmetry.
FAQ
What is the clamping voltage of SMCG24CA-E3/9AT at its rated peak pulse current?
The SMCG24CA-E3/9AT has a maximum clamping voltage (VC) of 38.9 V at 38.6 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value ensures protected circuits remain within safe operating limits during high-energy transients. The clamping performance is verified per ANSI/IEEE C62.35 and is consistent across production lots of SMCG24CA-E3/9AT.
Is SMCG24CA-E3/9AT suitable for automotive applications?
Yes, SMCG24CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor interfaces, and body electronics. Its bidirectional architecture, 150 °C maximum junction temperature, and MSL Level 1 reflow compatibility make SMCG24CA-E3/9AT appropriate for under-hood and cabin-mounted modules subject to harsh thermal and mechanical environments.
What does the "CA" suffix indicate in SMCG24CA-E3/9AT?
The "CA" suffix in SMCG24CA-E3/9AT denotes a bidirectional transient voltage suppressor configuration, meaning the device provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., SMCG24A), SMCG24CA-E3/9AT has no polarity marking and is used where AC signals, differential buses, or floating references require equal protection regardless of voltage polarity.
What is the thermal resistance of SMCG24CA-E3/9AT, and how does it affect layout design?
SMCG24CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value requires adequate copper area and thermal vias in PCB layout to maintain TJ ≤ 150 °C during repetitive surge events. Reducing pad size increases RθJA and risks thermal runaway - a key design constraint for SMCG24CA-E3/9AT in high-duty-cycle applications.
How does SMCG24CA-E3/9AT differ from SMCG24A in practical circuit implementation?
SMCG24CA-E3/9AT is bidirectional with no polarity marking, while SMCG24A is unidirectional and marked with a cathode band. In practice, SMCG24CA-E3/9AT can protect AC-coupled or floating nodes (e.g., CANH/CANL) without orientation concerns, whereas SMCG24A must be placed with correct cathode alignment relative to system ground. Both share identical VWM (24 V), PPPM (1500 W), and package (SMCG), but SMCG24CA-E3/9AT's symmetric behavior simplifies layout and eliminates assembly errors.
SMCG24CA-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 38.6A
- 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)
SMCG24CA-E3/9AT FAQ
1.How can I place an order for SMCG24CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG24CA-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 SMCG24CA-E3/9AT reliable?
The price and inventory of SMCG24CA-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 SMCG24CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG24CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG24CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG24CA-E3/9AT?
SMCG24CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG24CA-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 SMCG24CA-E3/9AT?
For technical support, including SMCG24CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG24CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG24CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG24CA-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 SMCG24CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG24CA-E3/9AT?
All SMCG24CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG24CA-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 SMCG24CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG24CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG24CA-E3/9AT Tags
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