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Vishay General Semiconductor - Diodes Division SMCG26A-M3/9AT
- Part No.:
- SMCG26A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG26A-M3/9AT.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,597
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Product details
Overview
SMCG26A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, with a standoff voltage of 26 V, breakdown voltage range of 28.9–31.9 V at 1 mA, peak pulse power rating of 1500 W (10/1000 µs), clamping voltage of 42.1 V at 35.6 A, and AEC-Q101 qualification for automotive-grade reliability. It protects MOSFETs and ICs against inductive switching transients in power supply rails.
For engineers reviewing the SMCG26A-M3/9AT datasheet, SMCG26A-M3/9AT pinout, SMCG26A-M3/9AT application, or SMCG26A-M3/9AT equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge, thermal resistance (RθJA = 75 °C/W), and direct alternatives for automotive and industrial overvoltage protection design.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy above its breakdown threshold while maintaining low leakage (<1 µA at 26 V). Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns).
The SMCG26A-M3/9AT uses the DO-215AB (SMCG) package with matte tin-plated leads, meets JESD201 Class 2 whisker resistance, and is rated for operating junction temperatures from –55 °C to +150 °C. It is halogen-free and RoHS compliant per M3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 42.1 V at 35.6 A - Clamped voltage during 1500 W transient; determines maximum stress on protected downstream circuitry. |
| PPPM | 1500 W - Peak pulse power handling (10/1000 µs waveform); supports high-energy surges in automotive load-dump scenarios. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on 8 mm × 8 mm copper pads; informs heatsinking requirements for sustained surge duty. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress-test standard; required for powertrain and body-control modules. |
Pinout & Package
Package: SMCG (DO-215AB) - Surface-mount gull-wing leaded package with 0.310" × 0.400" footprint, 0.058" lead width, and 0.024" lead thickness; optimized for automated placement and reflow soldering per J-STD-020 MSL Level 1 (260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms current loop during clamping. |
| Cathode | High-side surge input terminal | Marked by band; connects to protected line (e.g., 24 V rail); conducts avalanche current toward anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free construction | M3 suffix confirms compliance with IEC 61249-2-21; eliminates brominated flame retardants for safer end-of-life processing. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = ~13.2 V), reducing voltage overshoot on sensitive 24 V logic interfaces. |
| Glass-passivated junction | Provides stable, repeatable avalanche characteristics over temperature and lifetime; critical for long-term reliability in automotive applications. |
| MSL Level 1 rating | Allows unlimited floor life and single reflow at 260 °C peak without baking; simplifies SMT manufacturing flow. |
| Very fast response time | Sub-nanosecond turn-on ensures clamping before transient energy couples into downstream ICs or gate drivers. |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from ISO 7637-2 pulse 5a (load dump) transients up to 60 V peak. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground, clamping surges within 1 ns to limit voltage seen by PMIC and microcontroller inputs. Use Value: With VC = 42.1 V at 35.6 A, SMCG26A-M3/9AT holds rail voltage below 45 V-well under 50 V absolute maximum ratings of most 24 V automotive ICs. | Use Scenario: Safeguarding IGBT gate drivers and bus voltage monitors in variable-frequency drives subjected to inductive kickback from motor windings. IC Role / Device Role / Timing Role: Mounted across DC bus (+) and ground to clamp switching spikes before they propagate to control logic or feedback sensors. Use Value: 1500 W peak pulse power rating handles repetitive 10/1000 µs surges common in PWM-driven motors; RθJA = 75 °C/W allows thermal stability on standard PCB copper areas. |
| Telecom Line Interface Protection | Consumer Appliance Power Input |
Use Scenario: Shielding RS-485 transceivers and PoE controllers from lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Paired with series impedance (e.g., 2.2 Ω resistor) to form low-pass filter + clamping network on differential signal pair. Use Value: Bidirectional variants exist (e.g., SMCG26CA), but SMCG26A-M3/9AT serves unidirectional rail-to-ground protection with precise 26 V standoff matching telecom DC feed voltages. | Use Scenario: Guarding AC-DC adapter output stages in smart home hubs against ESD and capacitor discharge events during plug insertion. IC Role / Device Role / Timing Role: Placed at secondary-side 12–24 V output node to absorb 8 kV contact ESD (IEC 61000-4-2) and capacitive discharge transients. Use Value: AEC-Q101 qualification ensures robustness beyond consumer-grade requirements; 1 µA max leakage at 26 V prevents standby current degradation in always-on devices. |
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), lower PPPM (400 W), SMA (DO-214AC) package, non-AEC-Q101. | Not qualified for automotive use; suitable only for industrial/commercial boards where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive qualification and surge energy is ≤400 W. |
| SMCJ26A-M3/9AT | Same VWM (26 V), higher PPPM (1500 W), identical SMCG (DO-215AB) package, AEC-Q101 qualified. | Direct functional match with same footprint and rating-but SMCJ26A-M3/9AT has slightly higher VBR (29.4–32.6 V) and VC (43.5 V). | Choose if board layout accommodates identical SMCG package and requires marginally higher clamping tolerance. |
Compared with SMCG26A-M3/9AT, SMAJ26A-E3/57T offers lower cost and smaller footprint but sacrifices automotive qualification and surge capacity; SMCJ26A-M3/9AT matches power and qualification while accepting a 1.4 V higher clamping voltage-critical when protecting 3.3 V or 5 V logic referenced to 24 V rails.
Availability
SMCG26A-M3/9AT is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive DC bus safeguarding, and telecom line interface surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG26A-M3/9AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, automotive-qualified components for harsh-environment applications.
The SMCG series was developed specifically for surface-mount transient suppression in space-constrained automotive and industrial systems, balancing high surge capability, low clamping voltage, and AEC-Q101 compliance in the DO-215AB package.
FAQ
What is the breakdown voltage range of the SMCG26A-M3/9AT?
The SMCG26A-M3/9AT has a specified breakdown voltage (VBR) range of 28.9 V to 31.9 V at a test current of 1 mA, measured per ANSI/IEEE C62.35. This range ensures consistent avalanche initiation across production units and ambient temperatures, directly supporting reliable clamping performance in 24 V system protection designs.
Is the SMCG26A-M3/9AT suitable for automotive applications?
Yes, the SMCG26A-M3/9AT is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials per its M3 suffix. It is explicitly rated for operating junction temperatures from –55 °C to +150 °C and validated for mechanical shock, temperature cycling, and humidity testing required in automotive powertrain and body electronics-making SMCG26A-M3/9AT appropriate for under-hood and chassis-mounted modules.
What does the "M3" suffix indicate in SMCG26A-M3/9AT?
The "M3" suffix in SMCG26A-M3/9AT denotes halogen-free, RoHS-compliant construction meeting IEC 61249-2-21, along with JESD201 Class 2 whisker resistance and industrial-grade reliability. It distinguishes this variant from E3 (standard RoHS) and HM3 (AEC-Q101 + halogen-free) versions-confirming SMCG26A-M3/9AT's suitability for environmentally regulated industrial deployments without automotive qualification overhead.
How does the clamping voltage of SMCG26A-M3/9AT compare to its standoff voltage?
The SMCG26A-M3/9AT has a standoff voltage (VWM) of 26 V and a maximum clamping voltage (VC) of 42.1 V at 35.6 A peak pulse current. This 16.1 V differential reflects its low incremental surge resistance and defines the worst-case overvoltage imposed on protected circuitry during a 1500 W transient-critical for ensuring downstream ICs remain within absolute maximum ratings.
What is the thermal resistance of SMCG26A-M3/9AT, and how does it affect layout?
The SMCG26A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout; reducing pad area increases RθJA, potentially limiting surge repetition rate. For high-duty-cycle protection, designers must maintain full copper coverage beneath both terminals to sustain SMCG26A-M3/9AT's 1500 W rating without thermal runaway.
SMCG26A-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for SMCG26A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG26A-M3/9AT 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-M3/9AT reliable?
The price and inventory of SMCG26A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG26A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG26A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG26A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG26A-M3/9AT?
SMCG26A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG26A-M3/9AT 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-M3/9AT?
For technical support, including SMCG26A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG26A-M3/9AT requirements.
6.How does Aetrix verify that SMCG26A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG26A-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG26A-M3/9AT?
All SMCG26A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG26A-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG26A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG26A-M3/9AT Tags
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