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Vishay General Semiconductor - Diodes Division SMCG26AHE3/9AT
- Part No.:
- SMCG26AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG26AHE3/9AT.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,700
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Product details
Overview
SMCG26AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection with a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown range (VBR), and 1500 W peak pulse power (PPPM). It delivers clamping at 42.1 V under 35.6 A 10/1000 µs surge current and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SMCG26AHE3/9AT datasheet, SMCG26AHE3/9AT pinout, SMCG26AHE3/9AT application, or SMCG26AHE3/9AT equivalent, this device serves as a robust, surface-mount solution for protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning-induced surges in automotive, industrial, and telecom systems.
Technical Context
The SMCG26AHE3/9AT operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response to transient overvoltages. Its low incremental surge resistance and tight VBR tolerance (±5%) ensure consistent clamping performance across temperature and production lots.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets J-STD-020 MSL Level 1 (260 °C peak reflow) and supports automated placement. The cathode band marking enables unambiguous polarity identification during PCB layout and inspection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail for reliable standby operation. |
| VBR min/max | 28.9 V / 31.9 V - Breakdown occurs within this range at 1 mA test current; defines onset of protective conduction. |
| VC @ IPPM | 42.1 V - Clamped voltage at 35.6 A peak pulse current (10/1000 µs); determines maximum stress imposed on protected circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; enables survival of high-energy transients such as ISO 7637-2 Pulse 5a. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs thermal derating requirements for sustained power dissipation. |
Pinout & Package
Package: SMCG (DO-215AB) - Surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals, UL 94 V-0 molding compound, and AEC-Q101 qualification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or lower-potential node in unidirectional TVS configuration. | Provides reference path for surge current return; must be routed with low-inductance connection to minimize clamping overshoot. |
| Cathode | Current exit point in forward bias; marked with band; connected to line being protected. | Defines polarity-sensitive placement-reversal disables protection; band alignment critical for automated optical inspection (AOI) and functional validation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock-enables use in ADAS, body control, and powertrain modules without additional qualification. |
| Glass-passivated junction | Ensures stable VBR and leakage performance over time and temperature; eliminates risk of metallization migration or corrosion in harsh environments. |
| MSL Level 1 rating | Supports single-reflow soldering at 260 °C peak without moisture-induced damage-eliminates bake requirements and streamlines SMT line integration. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive CMOS inputs and high-speed interfaces. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges above 26 V. Use Value: Limits transient voltage to ≤42.1 V at 35.6 A, preventing damage to downstream DC-DC converters and microcontrollers rated for 40 V absolute maximum. | Use Scenario: Shielding analog output lines of pressure or temperature sensors in factory automation equipment. IC Role / Device Role / Timing Role: Low-capacitance TVS installed at connector interface to shunt ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge events. Use Value: Sub-100 pF junction capacitance preserves signal integrity up to 1 MHz while clamping transients within 1 ns-no added filtering or compensation needed. |
| Telecom DSL Line Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding ADSL/VDSL line drivers from lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Paired unidirectional TVS on tip/ring lines referenced to common-mode ground, coordinated with gas discharge tube (GDT) front-end. Use Value: Withstands 1500 W 10/1000 µs pulses per ITU-T K.20/K.21, enabling compliance with Class B telecom surge immunity standards. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb energy from L·di/dt spikes during PWM commutation and switch-off. Use Value: 200 A IFSM rating handles repetitive 8.3 ms half-sine surges without degradation-supports >100,000 motor start-stop cycles in lifetime testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57T | Same VWM (26 V) and PPPM (400 W), but lower peak power rating and SMA (DO-214AC) package with higher RθJA (110 °C/W). | Not AEC-Q101 qualified; limited to commercial/industrial use where automotive reliability is not required. | Select when cost sensitivity outweighs automotive qualification and thermal performance is less critical. |
| SMCJ26AHE3/9AT | Same VWM (26 V), AEC-Q101 qualified, but higher PPPM (1500 W) and larger SMC (DO-214AB) package (7.11 mm × 6.22 mm vs. SMCG's 7.11 mm × 5.59 mm). | Higher mounting footprint and slightly slower response due to larger junction area; suitable where board space permits and higher surge margin is needed. | Select when legacy SMC footprint compatibility is required or when derated operation at elevated ambient temperatures demands lower RθJA (50 °C/W). |
Compared with SMAJ26A-E3/57T and SMCJ26AHE3/9AT, the SMCG26AHE3/9AT offers the smallest footprint among AEC-Q101-qualified 26 V TVS diodes with 1500 W rating, enabling compact, high-density protection layouts without sacrificing automotive-grade reliability or thermal performance.
Availability
SMCG26AHE3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply across long production lifecycles.
Supply support for SMCG26AHE3/9AT 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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, surface-mount transient suppression in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and low-profile packaging are mandatory.
FAQ
What is the clamping voltage of the SMCG26AHE3/9AT under a 10/1000 µs surge?
The SMCG26AHE3/9AT clamps at 42.1 V when subjected to its rated peak pulse current of 35.6 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the maximum voltage seen by protected circuitry during worst-case transient events-critical for ensuring downstream components remain within their absolute maximum ratings.
Is the SMCG26AHE3/9AT suitable for automotive applications?
Yes, the SMCG26AHE3/9AT 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, body electronics, and ADAS modules. The HE3 suffix confirms AEC-Q101 qualification per Vishay's ordering nomenclature.
What does the "9AT" suffix indicate in SMCG26AHE3/9AT?
The "9AT" suffix denotes the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This format supports high-volume automated pick-and-place assembly and is compatible with standard SMT feeders. It differs from "57T", which specifies a 7-inch reel with 850 units.
How does the SMCG26AHE3/9AT compare to bidirectional variants like SMCG26CA?
The SMCG26AHE3/9AT is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMCG26CA is bidirectional with no polarity marking and symmetric breakdown in both directions. The unidirectional version provides lower leakage and tighter VBR tolerance, making it preferred for DC power rail protection; the bidirectional variant suits AC-coupled or floating signal lines.
What is the thermal resistance of the SMCG26AHE3/9AT on standard PCB layout?
The SMCG26AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes FR-4 board material and natural convection cooling-designers must apply derating curves from Figure 2 of the datasheet when operating above 25 °C ambient or under sustained power dissipation.
SMCG26AHE3/9AT 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCG26AHE3/9AT FAQ
1.How can I place an order for SMCG26AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG26AHE3/9AT 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 SMCG26AHE3/9AT reliable?
The price and inventory of SMCG26AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG26AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG26AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG26AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG26AHE3/9AT?
SMCG26AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG26AHE3/9AT 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 SMCG26AHE3/9AT?
For technical support, including SMCG26AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG26AHE3/9AT requirements.
6.How does Aetrix verify that SMCG26AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG26AHE3/9AT 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 SMCG26AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG26AHE3/9AT?
All SMCG26AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG26AHE3/9AT, 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 SMCG26AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG26AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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