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Vishay General Semiconductor - Diodes Division SMCG24CAHE3/9AT
- Part No.:
- SMCG24CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG24CAHE3/9AT.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,959
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Product details
Overview
SMCG24CAHE3/9AT 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 24 V standoff 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, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG24CAHE3/9AT datasheet, SMCG24CAHE3/9AT pinout, SMCG24CAHE3/9AT application, or SMCG24CAHE3/9AT equivalent, this device is selected for high-energy surge suppression in automotive sensor interfaces, industrial I/O lines, and telecom signal conditioning where bidirectional clamping, low clamping ratio, and MSL Level 1 solderability are required.
Technical Context
The SMCG24CAHE3/9AT operates as a bidirectional avalanche diode with symmetrical clamping in both polarities, enabling protection against voltage transients regardless of polarity-critical for AC-coupled or floating signal paths. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 1500 W peak pulse power handling with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients. |
| VC @ IPPM | 38.9 V at 38.6 A - Clamped voltage under full 1500 W surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W (10/1000 µs) - Peak surge energy handling capacity; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| TJ max | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments without derating. |
| AEC-Q101 | Qualified - Validated for automotive electronic systems per stress test requirements including HTOL, TCT, and ESD. |
| Package | SMCG (DO-215AB) - Low-profile SMD outline with gull-wing leads; compatible with automated placement and reflow up to 260 °C peak. |
Pinout & Package
SMCG24CAHE3/9AT uses the SMCG (DO-215AB) surface-mount package: a bidirectional device with no polarity marking; both terminals are electrically symmetrical. The package features matte tin-plated gull-wing leads, meets UL 94 V-0, and is rated MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (symmetrical) | Bidirectional conduction path; connects to protected line (e.g., CAN_H or LIN bus); no polarity dependency. |
| Terminal 2 | Anode/Cathode (symmetrical) | Second terminal of symmetrical TVS structure; completes clamping loop across differential or single-ended signal path. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature; eliminates parameter drift due to moisture or contamination. |
| AEC-Q101 qualification | Validates suitability for automotive ECUs, ADAS sensors, and body control modules requiring zero-failure field performance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving system immunity margin. |
| MSL Level 1, 260 °C peak | Enables standard lead-free reflow without baking or special handling; reduces manufacturing cost and risk of popcorning. |
| 1500 W peak pulse power | Supports protection against severe surges such as load dump (ISO 16750-2) and EFT bursts without degradation. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog outputs of pressure or temperature sensors in engine bay modules exposed to ISO 16750-2 load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge current before reaching precision ADC front-end. Use Value: Maintains signal integrity by limiting transient voltage to ≤38.9 V while surviving repeated 1500 W pulses-enabling >10-year field life in harsh environments. | Use Scenario: Safeguarding RS-485 transceiver inputs in factory automation PLCs subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary line-side TVS on differential bus pair (A/B), providing symmetric clamping without polarity concerns. Use Value: Eliminates need for dual unidirectional devices; reduces BOM count and PCB area while delivering identical 1500 W surge capability per line. |
| Telecom Signal Line Protection | Consumer Power Adapter Feedback Loop |
Use Scenario: Shielding Ethernet PHY magnetics or DSL line drivers from induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Secondary-level protector downstream of gas discharge tube (GDT), absorbing residual energy after primary diversion. Use Value: Fast response (<1 ps) and low clamping ratio (VC/VWM ≈ 1.62) prevent latch-up or damage to 3.3 V/5 V PHY ICs during multi-kV events. | Use Scenario: Securing optocoupler feedback path in isolated AC/DC adapters against coupling noise from primary-side MOSFET switching. IC Role / Device Role / Timing Role: Transient suppressor across secondary-side bias winding or TL431 reference input to prevent false regulation trips. Use Value: Withstands repetitive 100 V/µs transients common in flyback converters while maintaining <1 µA leakage at 24 V-preserving regulation accuracy. |
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 configuration, but lower PPPM (400 W) and larger SMA package (DO-214AC). | Not suitable for IEC 61000-4-5 Level 4 or automotive load dump; limited to consumer-grade surge zones. | Select SMAJ24CA only if board space allows larger footprint and surge requirement is ≤400 W. |
| SMCJ24CA | Same VWM and DO-214AB package, but higher PPPM (1500 W) and slightly higher VC (39.4 V); RoHS-compliant but not AEC-Q101 qualified. | Lacks automotive qualification; requires additional validation for ECU use; otherwise functionally interchangeable in industrial designs. | Choose SMCJ24CA for non-automotive 1500 W applications where AEC-Q101 is not mandated. |
Compared with SMAJ24CA and SMCJ24CA, SMCG24CAHE3/9AT uniquely combines AEC-Q101 qualification, DO-215AB's compact gull-wing form factor, and guaranteed 1500 W surge handling-making it the preferred choice for space-constrained, automotive-grade designs requiring zero-bake assembly and long-term reliability.
Availability
SMCG24CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 gateways, and telecom line card protection requiring stable component supply, AEC-Q101 assurance, and 13" tape-and-reel logistics support.
Supply support for SMCG24CAHE3/9AT 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMCG series was developed specifically for high-power, surface-mount transient suppression in demanding automotive and industrial environments-prioritizing low clamping voltage, symmetrical bidirectional response, and robust thermal performance in compact packages.
FAQ
What is the clamping voltage of SMCG24CAHE3/9AT at its rated peak pulse current?
The SMCG24CAHE3/9AT has a maximum clamping voltage (VC) of 38.9 V when subjected to its peak pulse current (IPPM) of 38.6 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events-critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMCG24CAHE3/9AT suitable for automotive applications?
Yes, SMCG24CAHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction-including glass-passivated junction, MSL Level 1 reflow compatibility, and operation from –55 °C to +150 °C-meets stringent requirements for engine control units, ADAS camera modules, and body electronics. The HE3 suffix confirms AEC-Q101 qualification per Vishay's ordering nomenclature.
What does the "CA" suffix indicate in SMCG24CAHE3/9AT?
The "CA" suffix in SMCG24CAHE3/9AT denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities-ideal for protecting AC-coupled lines, differential buses (e.g., CAN, RS-485), or floating references. Unlike unidirectional variants (e.g., SMCG24A), it has no cathode marking and exhibits identical VBR and VC characteristics in either direction.
How does the SMCG (DO-215AB) package differ from SMA or SMC packages?
The SMCG (DO-215AB) package features gull-wing leads optimized for fine-pitch automated placement and high thermal conductivity via large copper pad areas (8.0 mm × 8.0 mm per terminal). Compared to SMA (DO-214AC) and SMC (DO-214AB), SMCG offers lower thermal resistance (RθJL = 15 °C/W) and superior surge current handling in a footprint between the two-making SMCG24CAHE3/9AT ideal for space-constrained yet thermally demanding layouts.
What is the maximum reverse leakage current of SMCG24CAHE3/9AT at its standoff voltage?
At its 24 V standoff voltage (VWM), the SMCG24CAHE3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance circuits (e.g., sensor bias networks or feedback dividers) and minimizes standby power loss-key for battery-operated or precision analog systems where even nanoamp-level errors affect accuracy.
SMCG24CAHE3/9AT 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG24CAHE3/9AT FAQ
1.How can I place an order for SMCG24CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG24CAHE3/9AT 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 SMCG24CAHE3/9AT reliable?
The price and inventory of SMCG24CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG24CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG24CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG24CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG24CAHE3/9AT?
SMCG24CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG24CAHE3/9AT 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 SMCG24CAHE3/9AT?
For technical support, including SMCG24CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG24CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG24CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG24CAHE3/9AT 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 SMCG24CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG24CAHE3/9AT?
All SMCG24CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG24CAHE3/9AT, 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 SMCG24CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG24CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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