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Vishay General Semiconductor - Diodes Division SMCG26CA-M3/9AT
- Part No.:
- SMCG26CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG26CA-M3/9AT.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,155
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Product details
Overview
SMCG26CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection on signal and power lines. 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), clamping voltage of 42.1 V at 35.6 A, and AEC-Q101 qualification for automotive reliability.
For engineers reviewing the SMCG26CA-M3/9AT datasheet, SMCG26CA-M3/9AT pinout, SMCG26CA-M3/9AT application, or SMCG26CA-M3/9AT equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.4), halogen-free RoHS compliance (M3 suffix), 13" tape-and-reel packaging (9AT), and suitability for automotive sensor line and CAN bus interface protection under ISO 7637-2 pulse 1/2a/3a stress.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche junction to clamp reverse surges up to 1500 W with a 10/1000 µs waveform. Its bidirectional symmetry ensures identical clamping in both polarities, eliminating polarity concerns in AC-coupled or differential signal paths.
Thermally, it delivers 6.5 W power dissipation at TA = 50 °C with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The glass-passivated chip junction and MSL Level 1 rating support lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 28.9 V / 31.9 V at IT = 1 mA - Ensures predictable turn-on threshold across production lot |
| VC @ IPPM | 42.1 V at 35.6 A - Clamping voltage limits downstream IC stress during 10/1000 µs surge |
| PPPM | 1500 W - Withstands high-energy transients per ISO 7637-2 and IEC 61000-4-5 |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves signal integrity in high-impedance sensor interfaces |
| TJ max | +150 °C - Enables under-hood automotive deployment without derating |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMCG (DO-215AB), surface-mount gull-wing, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. No polarity marking - bidirectional symmetry confirmed per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current into device during positive overvoltage event |
| Cathode | Transient current entry (negative half-cycle) | Conducts surge current into device during negative overvoltage event; symmetric with Anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions eliminates need for polarity-aware layout |
| Low clamping ratio (VC/VBR) | ~1.4 - Minimizes voltage overshoot across protected node during fast transients |
| AEC-Q101 qualification | Validated for automotive electronics including engine control, ADAS sensors, and infotainment |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak, no floor life limitation |
| Glass-passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
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 TVS clamps ± transients before they reach ADC input or op-amp front-end. Use Value: Prevents sensor signal corruption and microcontroller reset events during 100 V/50 ms load dump pulses per ISO 7637-2. | Use Scenario: Safeguarding CANH/CANL differential pair against ESD and coupled surges in body control modules and gateway units. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp absorbs fast transients while preserving signal edge integrity at 1 Mbps data rate. Use Value: Maintains CAN bus communication continuity during 8 kV contact ESD (IEC 61000-4-2) and 10/1000 µs surge events. |
| Industrial PLC I/O Protection | Telecom Line Interface Protection |
Use Scenario: Shielding 24 V DC digital input channels in programmable logic controllers from field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Standoff voltage (26 V) matches common 24 V industrial supply rails; clamps transients above 32 V. Use Value: Enables >100,000 surge cycles without degradation, supporting 15+ year PLC service life. | Use Scenario: Protecting RS-485/RS-422 transceiver pins in telecom base station backhaul equipment connected to outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional suppression handles both common-mode and differential-mode surges on twisted-pair lines. Use Value: Survives repeated 1 kV/0.5 J surges per ITU-T K.21 basic protection level without parameter shift. |
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-E3/57T | Same VWM/VBR/PPPM specs but SMA (DO-214AC) package; higher RθJA (90 °C/W) and lower IPPM (33.3 A) | Limited to lower-power or non-automotive applications due to lower surge current rating and no AEC-Q101 qualification | Select when footprint constraints favor SMA or cost sensitivity outweighs automotive qualification needs |
| SMCJ26CA-M3 | Same DO-215AB package and AEC-Q101 rating, but higher PPPM (3000 W); VBR range 28.9–31.9 V unchanged | Overqualified for 1500 W surge environments; larger thermal mass may impact layout density | Choose when system-level testing requires margin beyond ISO 7637-2 Level III or when protecting high-current power rails |
Compared with SMAJ26CA-E3/57T, SMCG26CA-M3/9AT offers superior surge current handling and automotive qualification; versus SMCJ26CA-M3, it provides optimal balance of 1500 W capability, compact size, and AEC-Q101 compliance for cost-sensitive automotive signal lines.
Availability
SMCG26CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus nodes, industrial PLC I/O modules, and telecom line drivers requiring stable component supply across multi-year production programs.
Supply support for SMCG26CA-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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMCG series targets high-energy transient suppression in space-constrained automotive and industrial applications, combining AEC-Q101 qualification, halogen-free construction, and DO-215AB's optimized thermal performance.
FAQ
What is the clamping voltage of SMCG26CA-M3/9AT at its rated peak pulse current?
The SMCG26CA-M3/9AT has a maximum clamping voltage (VC) of 42.1 V at its peak pulse current (IPPM) of 35.6 A, measured with a 10/1000 µs waveform. This value ensures downstream circuitry remains below safe voltage thresholds during standardized surge events defined in IEC 61000-4-5 and ISO 7637-2. The SMCG26CA-M3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG26CA-M3/9AT suitable for automotive applications?
Yes, SMCG26CA-M3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validation across temperature cycling, HTRB, and mechanical shock make it appropriate for engine control units, ADAS sensors, and body electronics. The SMCG26CA-M3/9AT meets requirements for ISO 7637-2 pulse 1, 2a, and 3a immunity testing.
What does the "M3" suffix indicate in SMCG26CA-M3/9AT?
"M3" denotes halogen-free, RoHS-compliant construction with industrial-grade reliability and JESD 201 Class 2 whisker resistance. Unlike "E3" (standard RoHS), M3 ensures compliance with stricter environmental regulations such as China RoHS II and JEITA EG0202. The SMCG26CA-M3/9AT also meets UL 94 V-0 flammability requirements for its molding compound.
How does the bidirectional design of SMCG26CA-M3/9AT affect PCB layout?
The SMCG26CA-M3/9AT has no polarity marking and identical electrical behavior in both directions, simplifying PCB layout by eliminating cathode/anode orientation checks. Engineers can place the device symmetrically across differential lines (e.g., CANH/CANL) or AC-coupled signals without concern for orientation. This symmetry reduces assembly errors and supports automated optical inspection (AOI) with fewer rule exceptions. The SMCG26CA-M3/9AT's DO-215AB footprint remains unchanged regardless of signal polarity.
What is the thermal resistance profile of SMCG26CA-M3/9AT?
SMCG26CA-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, measured on the recommended 0.31" × 0.31" copper pad layout. These values enable 6.5 W power dissipation at TA = 50 °C and support sustained operation at TJ = 150 °C when mounted per datasheet guidelines. The SMCG26CA-M3/9AT's low RθJL facilitates heat transfer through solder joints into PCB copper, critical for high-reliability automotive deployments.
SMCG26CA-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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG26CA-M3/9AT FAQ
1.How can I place an order for SMCG26CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG26CA-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 SMCG26CA-M3/9AT reliable?
The price and inventory of SMCG26CA-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 SMCG26CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG26CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG26CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG26CA-M3/9AT?
SMCG26CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG26CA-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 SMCG26CA-M3/9AT?
For technical support, including SMCG26CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG26CA-M3/9AT requirements.
6.How does Aetrix verify that SMCG26CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG26CA-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 SMCG26CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG26CA-M3/9AT?
All SMCG26CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG26CA-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 SMCG26CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG26CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG26CA-M3/9AT Tags
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