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Vishay General Semiconductor - Diodes Division SMCG26A-E3/9AT
- Part No.:
- SMCG26A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG26A-E3/9AT.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,945
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Product details
Overview
SMCG26A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, featuring a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), and clamping voltage of 42.1 V at 35.6 A. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial power electronics.
For engineers reviewing the SMCG26A-E3/9AT datasheet, SMCG26A-E3/9AT pinout, SMCG26A-E3/9AT application, or SMCG26A-E3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability with 10/1000 µs waveform, low clamping ratio (VC/VBR ≈ 1.37), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when reverse voltage exceeds VBR to limit transient energy. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while its low incremental surge resistance enables rapid voltage suppression during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a).
The SMCG26A-E3/9AT is rated for TJ = –55 °C to +150 °C, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation under high ambient conditions when mounted per recommended pad layout. It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Ensures predictable turn-on threshold with tight tolerance |
| VC @ IPPM | 42.1 V at 35.6 A - Clamped voltage during 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 1500 W - Peak transient energy absorption capacity without failure |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max. | +150 °C - Enables use in engine control units and power converters with elevated ambient temperatures |
| Package | SMCG (DO-215AB) - Low-profile SMD outline compatible with standard reflow profiles and automated pick-and-place |
Pinout & Package
SMCG26A-E3/9AT uses the SMCG (DO-215AB) surface-mount package: gull-wing leads, matte tin-plated terminals solderable per J-STD-002, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference | Provides return path during clamping; must be routed with low-inductance trace to minimize overshoot |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., 24 V rail or CAN signal) | Band-marked end; reverse-biased during normal operation; conducts surge current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift |
| MSL Level 1 rating | Allows unlimited floor life and exposure to 260 °C peak reflow without popcorn or delamination |
| Low clamping ratio (VC/VBR) | ≈1.37 - Minimizes overvoltage margin required for protected ICs, reducing design safety factor overhead |
| 1500 W surge rating | Withstands repetitive 10/1000 µs transients up to 35.6 A, meeting ISO 7637-2 Pulse 1 and IEC 61000-4-5 Level 4 |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in body control modules against load dump and inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤42.1 V, preventing damage to 36 V-rated input capacitors and enabling use of lower-voltage, cost-optimized regulators. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across signal and ground near connector, with <1.0 µA leakage preserving loop accuracy. Use Value: Maintains signal fidelity while absorbing ±15 kV contact ESD per IEC 61000-4-2 without latch-up or parametric shift. |
| Motor Drive Gate Protection | Telecom DC Power Input Stage |
Use Scenario: Safeguarding high-side N-channel MOSFET gate drivers from Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: TVS placed between gate and source, clamping dv/dt-induced overshoot before it exceeds gate oxide rating. Use Value: Prevents gate oxide breakdown with 42.1 V clamp, allowing robust 30 V-rated gate drivers to operate reliably at 24 V nominal bus. | Use Scenario: Front-end protection for -48 V telecom rectifier outputs exposed to lightning-induced surges on long feeder lines. IC Role / Device Role / Timing Role: Bidirectional variant not applicable; SMCG26A-E3/9AT used in unidirectional configuration on positive rail relative to chassis ground. Use Value: Absorbs 1500 W pulses without degradation, extending service life of upstream DC/DC converters and reducing field failure rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57T | Same VWM (26 V), same PPPM (1500 W), but SMA (DO-214AC) package - larger footprint and higher RθJA (95 °C/W) | Less suitable for space-constrained automotive modules; requires larger PCB area and more thermal relief | Select SMCG26A-E3/9AT when board space is limited and thermal performance under high ambient is critical |
| SMCJ26A-E3/9AT | Same VWM and PPPM, but SMC (DO-214AB) package - higher IFSM (400 A vs. 200 A) and higher VC (45.7 V) | Better for high-energy single-event surges; less optimal for repetitive transients due to higher clamping voltage | Choose SMCG26A-E3/9AT where consistent low clamping and AEC-Q101 compliance are prioritized over peak surge current headroom |
Compared with SMAJ26A-E3/57T and SMCJ26A-E3/9AT, the SMCG26A-E3/9AT delivers superior thermal efficiency (RθJA = 75 °C/W), tighter mechanical tolerances for automated assembly, and verified AEC-Q101 qualification-making it the preferred choice for next-generation automotive ECUs and compact industrial controllers requiring high-reliability transient suppression.
Availability
SMCG26A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, motor drive gate protection, and telecom DC power input stages requiring stable component supply and full traceability.
Supply support for SMCG26A-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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, ruggedness, and automotive-grade qualification.
The SMCG series was developed specifically for high-power, low-profile transient suppression in space-constrained automotive and industrial environments, combining AEC-Q101 compliance with industry-leading 1500 W surge capability in the DO-215AB outline.
FAQ
What is the maximum clamping voltage of the SMCG26A-E3/9AT under a 10/1000 µs surge?
The SMCG26A-E3/9AT has a maximum clamping voltage (VC) of 42.1 V at a peak pulse current (IPPM) of 35.6 A under the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and reflects worst-case voltage seen by protected circuitry during surge events, ensuring downstream components remain within safe operating limits.
Is the SMCG26A-E3/9AT qualified for automotive applications?
Yes, the SMCG26A-E3/9AT is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias, temperature cycling, and ESD per the AEC-Q101 standard. Its "HE3" and "HM3" variants are explicitly marked for automotive use, and the E3/9AT variant shares identical die and construction-confirmed by Vishay's material categorization documentation (doc?99912).
What does the "E3/9AT" suffix indicate in SMCG26A-E3/9AT?
The "E3" denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads; "9AT" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This format supports high-volume SMT assembly and is compatible with standard pick-and-place feeders used in automotive electronics manufacturing.
How does the SMCG26A-E3/9AT compare to bidirectional TVS diodes like SMCG26CA?
The SMCG26A-E3/9AT is unidirectional and intended for DC line protection where polarity is fixed (e.g., 24 V supply rails), offering lower leakage (<1.0 µA) and tighter VBR tolerance. In contrast, SMCG26CA is bidirectional and suited for AC or differential signal lines (e.g., RS-485), with symmetrical clamping in both directions but higher ID (≤1000 µA). They are not interchangeable without circuit redesign.
What thermal derating applies to the SMCG26A-E3/9AT above 25 °C ambient?
The SMCG26A-E3/9AT must be derated linearly above TA = 25 °C per Figure 2 in the datasheet: peak pulse power decreases by approximately 0.8% per °C rise. At 100 °C ambient, PPPM drops to ~900 W. Effective thermal management requires adherence to the 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pad layout to maintain RθJA ≤ 75 °C/W.
SMCG26A-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG26A-E3/9AT FAQ
1.How can I place an order for SMCG26A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG26A-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 SMCG26A-E3/9AT reliable?
The price and inventory of SMCG26A-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 SMCG26A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG26A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG26A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG26A-E3/9AT?
SMCG26A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG26A-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 SMCG26A-E3/9AT?
For technical support, including SMCG26A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG26A-E3/9AT requirements.
6.How does Aetrix verify that SMCG26A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG26A-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 SMCG26A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG26A-E3/9AT?
All SMCG26A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG26A-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 SMCG26A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG26A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG26A-E3/9AT Tags
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