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Vishay General Semiconductor - Diodes Division SMCG26CAHE3/57T
- Part No.:
- SMCG26CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG26CAHE3/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,439
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Product details
Overview
SMCG26CAHE3/57T 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 sensitive electronics. It features a 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 42.1 V at 35.6 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG26CAHE3/57T datasheet, SMCG26CAHE3/57T pinout, SMCG26CAHE3/57T application, or SMCG26CAHE3/57T 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 reflow compatibility are critical.
Technical Context
The SMCG26CAHE3/57T operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±28.9 V in either polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while its DO-215AB package delivers thermal resistance of 75 °C/W (junction-to-ambient) and supports 200 A IFSM surge current in unidirectional test conditions - though the CA suffix confirms bidirectional functionality with identical VBR min/max in both directions.
Designed for automated SMT assembly, it meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements. The matte tin-plated leads comply with J-STD-002 and JESD22-B102 solderability standards, and its AEC-Q101 qualification validates performance across -55 °C to +150 °C operating junction temperature range under automotive stress profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse stand-off voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed bidirectional breakdown range; ensures symmetrical clamping onset in both polarities. |
| VC @ IPPM | 42.1 V at 35.6 A - Clamped voltage during 10/1000 µs surge; yields clamping ratio of ~1.62, critical for protecting downstream 3.3 V or 5 V logic. |
| PPPM | 1500 W - Peak pulse power handling capability; enables survival of ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage at rated stand-off; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments and sealed industrial enclosures. |
| Package | SMCG (DO-215AB) - Standardized 2-pin gull-wing SMT outline with 0.31" × 0.31" copper pad recommendation; optimized for thermal dissipation and pick-and-place compatibility. |
Pinout & Package
SMCG26CAHE3/57T uses the SMCG (DO-215AB) surface-mount package: a 2-terminal gull-wing leaded case with no polarity marking for bidirectional devices. Terminals are matte tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Mounting requires 8.0 mm × 8.0 mm copper pads per terminal for rated power derating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No functional polarity - terminals are interchangeable; voltage clamping occurs identically across either direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and infotainment interfaces per stress test requirements. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
| Glass passivated chip junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime, critical for safety-critical systems. |
| 1500 W peak pulse power (10/1000 µs) | Provides robust immunity against high-energy transients such as load dump, inductive switching, and lightning-induced surges. |
| Low incremental surge resistance | Enables tight clamping voltage window (VC − VBR ≈ 13.2 V), minimizing voltage overshoot seen by protected ICs. |
Applications
| Automotive Sensor Protection | Industrial Fieldbus Interface |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers and MEMS pressure/temperature sensors in engine compartments subject to ISO 7637-2 pulses and ESD events. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under 10/1000 µs surges up to 1500 W while holding clamped voltage below 42.1 V - within safe input range of 5 V tolerant transceivers. |
Use Scenario: Safeguarding RS-485/RS-422 transceivers on factory floor PLC I/O modules exposed to motor drive noise and ground loop transients. IC Role / Device Role / Timing Role: Primary line-side TVS on differential data lines, working in concert with common-mode chokes and GDTs for multi-stage protection. Use Value: Fast response time and symmetrical clamping prevent data corruption during repetitive 1 kV/500 A transients, extending system uptime in harsh electromagnetic environments. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter ESD Guard |
Use Scenario: Front-end protection for DSL/VDSL line interface units (LIUs) handling POTS/ADSL signals in central office equipment. IC Role / Device Role / Timing Role: First-stage transient suppressor on tip/ring lines, absorbing energy from lightning-induced surges before secondary protection stages. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W and maintains <1 µA leakage at 26 V - preserving signal-to-noise ratio in analog voice paths. |
Use Scenario: Secondary-side overvoltage clamp on 5 V USB-C power delivery rails in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Low-leakage bidirectional clamp preventing latch-up or gate oxide damage in PMICs and USB controllers during hot-plug ESD events. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <42.1 V within nanoseconds, eliminating need for additional series impedance while meeting Class B EMC compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA | Same VWM (26 V) and bidirectional configuration, but lower PPPM (400 W) and higher VC (42.7 V at 9.9 A); SMA package (DO-214AC), larger footprint and higher RθJA (110 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for ISO 7637-2 Pulse 5a or lightning-level threats. | Select when cost or legacy layout constraints prioritize SMA over SMCG, and surge energy is confirmed ≤400 W. |
| SMD15T26C | Higher PPPM (1500 W same), but unidirectional-only; requires external polarity management; TO-277 package (smaller thermal mass, RθJA = 85 °C/W). | Cannot protect AC-coupled or floating differential lines without added circuitry; not AEC-Q101 qualified. | Choose only for DC-biased single-ended rails where polarity is fixed and automotive qualification is not required. |
Compared with SMAJ26CA and SMD15T26C, SMCG26CAHE3/57T uniquely combines AEC-Q101 qualification, DO-215AB thermal efficiency (RθJA = 75 °C/W), and guaranteed 1500 W bidirectional clamping - making it the preferred choice for automotive and industrial designs demanding both reliability and high-energy resilience.
Availability
SMCG26CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial fieldbus nodes, and telecom line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCG26CAHE3/57T 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, precision, and application-specific optimization.
The SMCG series was developed specifically for high-power, surface-mount transient suppression in automotive and industrial environments - prioritizing AEC-Q101 compliance, low clamping ratio, and reflow-ready packaging.
FAQ
What does the "CA" suffix indicate in SMCG26CAHE3/57T?
The "CA" suffix denotes a bidirectional configuration: SMCG26CAHE3/57T provides symmetrical transient suppression in both polarities, with matched breakdown voltages (28.9–31.9 V) and clamping behavior. Unlike unidirectional variants (e.g., SMCG26A), it has no cathode band marking and is used where AC-coupled or floating signal lines require equal protection against positive and negative surges - such as in CAN, RS-485, or audio interfaces. This is confirmed in Vishay's documentation for the SMCG family.
Is SMCG26CAHE3/57T compatible with lead-free reflow soldering?
Yes, SMCG26CAHE3/57T is rated for MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, making it fully compatible with standard lead-free soldering processes without pre-baking. Its matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability requirements, and the package construction supports repeated thermal cycling without delamination or parameter shift - a key requirement validated under AEC-Q101 testing.
How does the clamping voltage of SMCG26CAHE3/57T compare to its breakdown voltage?
SMCG26CAHE3/57T has a minimum breakdown voltage (VBR) of 28.9 V at 1 mA and clamps to 42.1 V at its rated peak pulse current (35.6 A, 10/1000 µs). This yields a clamping ratio (VC/VBR) of approximately 1.46, indicating efficient voltage limiting with minimal overshoot. That ratio is critical for ensuring protected ICs - such as 3.3 V or 5 V microcontrollers - remain within absolute maximum ratings during surge events, as verified in Vishay's electrical characteristics table.
What is the significance of the "HE3" in SMCG26CAHE3/57T?
The "HE3" suffix indicates RoHS-compliant, AEC-Q101-qualified industrial-grade construction: "H" denotes AEC-Q101 qualification, "E3" specifies matte tin plating and RoHS compliance (per JEDEC J-STD-609). This distinguishes SMCG26CAHE3/57T from non-automotive variants like SMCG26CA-E3/57T (RoHS but not AEC-Q101) and confirms its suitability for mission-critical automotive applications including powertrain and ADAS subsystems per Vishay's mechanical data section.
Can SMCG26CAHE3/57T be used in place of a unidirectional TVS like SMCG26A?
No - SMCG26CAHE3/57T is strictly bidirectional and cannot replace unidirectional devices like SMCG26A in DC-biased circuits without redesign. Unidirectional types rely on polarity-aware placement (cathode band) and conduct forward current during positive surges only; substituting SMCG26CAHE3/57T would allow unintended conduction during normal forward bias, potentially disrupting circuit operation. The datasheet explicitly separates unidirectional and bidirectional electrical tables, confirming distinct use cases.
SMCG26CAHE3/57T 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 35.6A
- 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)
SMCG26CAHE3/57T FAQ
1.How can I place an order for SMCG26CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG26CAHE3/57T 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 SMCG26CAHE3/57T reliable?
The price and inventory of SMCG26CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG26CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG26CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG26CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG26CAHE3/57T?
SMCG26CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG26CAHE3/57T 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 SMCG26CAHE3/57T?
For technical support, including SMCG26CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG26CAHE3/57T requirements.
6.How does Aetrix verify that SMCG26CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG26CAHE3/57T 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 SMCG26CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG26CAHE3/57T?
All SMCG26CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG26CAHE3/57T, 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 SMCG26CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCG26CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG26CAHE3/57T Tags
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