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Vishay General Semiconductor - Diodes Division SMCG26CAHE3/9AT
- Part No.:
- SMCG26CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG26CAHE3/9AT.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,264
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Product details
Overview
SMCG26CAHE3/9AT 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 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 35.6 A peak pulse current (IPPM), and clamps to 42.1 V at IPPM - ideal for automotive sensor line and CAN bus interface protection.
For engineers reviewing the SMCG26CAHE3/9AT datasheet, SMCG26CAHE3/9AT pinout, SMCG26CAHE3/9AT application, or SMCG26CAHE3/9AT equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping, low incremental surge resistance, and RoHS-compliant matte tin-plated leads suitable for high-reliability industrial and automotive PCB designs.
Technical Context
The SMCG26CAHE3/9AT operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Designed for 10/1000 µs waveform transients, it delivers 1500 W peak pulse power dissipation with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse working voltage before clamping begins |
| VBR min/max | 28.9 V / 31.9 V at IT = 1 mA - tight breakdown window ensures predictable turn-on threshold |
| VC @ IPPM | 42.1 V - clamping voltage during 35.6 A 10/1000 µs surge, limiting downstream voltage stress |
| PPPM | 1500 W - peak transient energy absorption capability per single event |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables use in under-hood automotive environments and thermally constrained layouts |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded package with 8.0 mm × 8.0 mm copper pad footprint per terminal; meets UL 94 V-0 flammability rating and AEC-Q101 qualification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | Bidirectional conduction path - no polarity marking; symmetric terminals for AC protection |
| Cathode | Terminal K | Bidirectional conduction path - identical to Anode; device functions identically in either orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per JEDEC standards |
| Glass-passivated junction | Ensures stable VBR drift < ±5 % over lifetime and immunity to moisture-induced degradation |
| MSL Level 1 (260 °C) | Compatible with standard SMT reflow profiles without pre-baking or special handling |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
Applications
| Automotive Sensor Protection | CAN Bus Interface Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors exposed to load-dump and inductive switching noise in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transients before they reach ADC input or op-amp buffer. Use Value: Maintains signal fidelity by limiting voltage excursions to ≤42.1 V during 35.6 A surges, preventing latch-up or damage to 3.3 V/5 V sensor interface ICs. | Use Scenario: Safeguarding CANH/CANL differential pair against ESD (IEC 61000-4-2) and electrical fast transients (IEC 61000-4-4) in body control modules. IC Role / Device Role / Timing Role: Symmetric TVS across CANH–CANL and each line-to-ground, providing common-mode and differential-mode surge suppression. Use Value: Clamps transients within nanoseconds while adding <1 pF capacitance per line, preserving CAN bit timing integrity up to 1 Mbps. |
| Industrial PLC I/O Protection | Telecom Line Card Surge Suppression |
Use Scenario: Shielding 24 V DC digital input channels on programmable logic controllers from field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between input terminal and chassis ground, shunting >1 kV transients away from optocoupler input stage. Use Value: Withstands repeated 1500 W pulses without parameter shift, ensuring long-term immunity in factory-floor environments with frequent motor switching. | Use Scenario: Protecting Ethernet PHY or RS-485 transceivers on telecom line cards from lightning-induced surges entering via external cabling. IC Role / Device Role / Timing Role: Primary-level bidirectional clamp on data lines, coordinated with secondary GDT or MOV stages for staged energy diversion. Use Value: Delivers 42.1 V clamping at full 35.6 A surge current, reducing stress on downstream TVS arrays and enabling compact, cost-effective multi-stage protection schemes. |
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 PPPM (400 W), but lower 400 W rating and SMA package (DO-214AC); RθJA = 110 °C/W | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a (1500 W) | Select only when board space is constrained and surge energy remains below 400 W. |
| SMCJ26CA | Same VWM (26 V) and PPPM (1500 W), but larger SMC (DO-214AB) package; RθJA = 40 °C/W | Higher thermal margin and higher IFSM (200 A), but requires 30% more PCB area | Prefer when sustained surge repetition or elevated ambient temperatures demand superior thermal performance. |
Compared with SMAJ26CA and SMCJ26CA, the SMCG26CAHE3/9AT delivers identical 1500 W surge capability in a smaller DO-215AB footprint than SMCJ, while offering significantly higher power handling than SMAJ - making it optimal for space-constrained AEC-Q101 applications where thermal and mechanical robustness are balanced.
Availability
SMCG26CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus nodes, industrial PLC I/O modules, and telecom line card protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMCG26CAHE3/9AT 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 automotive qualification.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom systems demanding AEC-Q101 validation and repeatable clamping performance.
FAQ
What does the "HE3" suffix indicate in SMCG26CAHE3/9AT?
The HE3 suffix in SMCG26CAHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements. It confirms automotive-grade reliability and lead-free process compliance - distinct from E3 (industrial RoHS) or HM3 (halogen-free + AEC-Q101) variants.
Is SMCG26CAHE3/9AT unidirectional or bidirectional?
SMCG26CAHE3/9AT is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number and its symmetrical electrical characteristics - including matched VBR min/max in both directions and absence of polarity marking. It provides identical clamping behavior for positive and negative transients, making it suitable for AC signal lines and differential buses like CAN.
What is the clamping voltage of SMCG26CAHE3/9AT at its rated peak pulse current?
The clamping voltage (VC) of SMCG26CAHE3/9AT is 42.1 V at its rated peak pulse current (IPPM) of 35.6 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the maximum voltage imposed on protected circuitry during a full-rated transient event.
Does SMCG26CAHE3/9AT require a heatsink for 1500 W pulse handling?
No, SMCG26CAHE3/9AT does not require an external heatsink for single-event 1500 W pulse handling, as its thermal design relies on short-duration energy absorption and PCB copper pad thermal mass. However, for repetitive surges or elevated ambient temperatures, adherence to the recommended 8.0 mm × 8.0 mm copper pad layout per terminal is essential to maintain RθJA ≤ 75 °C/W and avoid junction overheating.
How does the SMCG package differ from SMA or SMC packages in practical layout?
The SMCG (DO-215AB) package of SMCG26CAHE3/9AT uses gull-wing leads with 1.02 mm lead width and 2.41 mm lead spacing - narrower than SMC (DO-214AB) and wider than SMA (DO-214AC). Its 7.11 mm × 3.17 mm body allows tighter placement density than SMC while maintaining higher surge rating than SMA, and its MSL Level 1 rating simplifies assembly versus moisture-sensitive alternatives.
SMCG26CAHE3/9AT 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):
- 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)
SMCG26CAHE3/9AT FAQ
1.How can I place an order for SMCG26CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG26CAHE3/9AT 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 SMCG26CAHE3/9AT reliable?
The price and inventory of SMCG26CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG26CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG26CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG26CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG26CAHE3/9AT?
SMCG26CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG26CAHE3/9AT 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 SMCG26CAHE3/9AT?
For technical support, including SMCG26CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG26CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG26CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG26CAHE3/9AT 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 SMCG26CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG26CAHE3/9AT?
All SMCG26CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG26CAHE3/9AT, 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 SMCG26CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG26CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG26CAHE3/9AT Tags
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