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Vishay General Semiconductor - Diodes Division SMC3K26CA-M3/9A
- Part No.:
- SMC3K26CA-M3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K26CA-M3/9A.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,363
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Product details
Overview
SMC3K26CA-M3/9A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), with a breakdown voltage range of 28.9 V to 31.9 V and clamping voltage of 42.1 V at 71.3 A peak surge current. It protects sensitive ICs and MOSFETs against inductive switching transients and lightning-induced surges in automotive and industrial power rails.
For engineers reviewing the SMC3K26CA-M3/9A datasheet, SMC3K26CA-M3/9A pinout, SMC3K26CA-M3/9A application, or SMC3K26CA-M3/9A equivalent, key selection criteria include its AEC-Q101 qualification, bidirectional polarity, 26 V standoff voltage, low incremental surge resistance, and compatibility with wave-soldering process constraints excluding bottom-side mounting.
Technical Context
The SMC3K26CA-M3/9A operates as a silicon avalanche diode-based TVS, delivering fast response time and stable clamping performance under repetitive transient stress. Its bidirectional configuration enables symmetrical protection on AC lines or unidirectional DC lines without polarity concerns.
Designed for high-energy surge suppression, it sustains 3000 W peak pulse power per IEC 61000-4-5 (10/1000 μs waveform) and maintains clamping voltage ≤42.1 V up to 71.3 A, with thermal derating above 25 °C ambient per JESD22-A104. It meets MSL Level 1 per J-STD-020 and UL 497B safety recognition (E136766).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - supports robust surge immunity in automotive load-dump and industrial motor-drive environments |
| Breakdown Voltage VBR | 28.9 V min / 31.9 V max at 1 mA - defines reliable avalanche initiation threshold for overvoltage detection |
| Standoff Voltage VWM | 26 V - maximum continuous reverse working voltage before leakage exceeds 2 μA |
| Clamping Voltage VC | 42.1 V at 71.3 A IPPM - limits downstream voltage during worst-case surge, protecting 30 V-rated components |
| Operating Temperature Range | –55 °C to +150 °C - enables deployment in under-hood automotive and high-temp industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad area for thermal dissipation |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SMC3K26CA-M3/9A uses the SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, and J-STD-002/JESD 22-B102 solderability compliance. Polarity is unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Surge current return path | Both terminals are electrically symmetric; either may serve as input or return depending on transient polarity |
| Anode (Cathode) | Surge current entry point | No functional distinction between terminals-bidirectional conduction eliminates orientation dependency during layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional polarity only | Eliminates need for polarity-aware placement; simplifies PCB routing on AC-coupled or floating signal/power lines |
| 3000 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive subsystems |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS power domains |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns |
| UL 497B recognized (E136766) | Supports end-equipment safety certification for telecom, industrial, and transportation systems |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 24 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary clamping device placed at main power entry point before DC/DC converters and microcontrollers. Use Value: Clamps transients to ≤42.1 V, ensuring downstream 30 V-rated regulators and logic remain within absolute maximum ratings. |
Use Scenario: Input-stage surge suppression on variable-frequency drives handling inductive kickback from 3-phase motors. IC Role / Device Role / Timing Role: Fast-acting shunt element parallel to rectifier output, diverting energy before bus capacitors charge. Use Value: 3000 W pulse rating absorbs multi-millisecond transients without degradation, maintaining system uptime. |
| Telecom Line Interface Protection | Consumer Appliance Control Board |
Use Scenario: Secondary protection on AC/DC adapter outputs feeding PoE-powered network switches. IC Role / Device Role / Timing Role: Back-to-back TVS pair across DC output rails to suppress common-mode surges induced by nearby lightning strikes. Use Value: Bidirectional symmetry ensures equal clamping on both rail-to-rail and rail-to-ground transients. |
Use Scenario: Overvoltage safeguard on microcontroller I/O lines connected to relay coils and solenoid drivers. IC Role / Device Role / Timing Role: Localized transient absorber mounted directly at actuator driver output pins. Use Value: 71.3 A peak surge current capacity handles repeated coil de-energization spikes without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K26CAHM3/9A | AEC-Q101 qualified version with identical electrical specs; HM3 suffix denotes automotive qualification grade | Required for new automotive designs where AEC-Q101 compliance is mandatory; same footprint and pinout | Select SMC3K26CAHM3/9A when qualifying for production in automotive OEM programs |
| SMC3K24CA-M3/9A | Lower VWM (24 V) and VBR (26.7–29.5 V); clamps at 38.9 V @ 77.1 A | Better suited for 24 V nominal systems with tighter margin between operating voltage and clamp level | Choose SMC3K24CA-M3/9A if system VCC tolerances require lower standby leakage and earlier clamping onset |
Compared with SMC3K26CA-M3/9A, SMC3K26CAHM3/9A adds automotive qualification without electrical change, while SMC3K24CA-M3/9A trades higher clamping headroom for tighter voltage coordination in 24 V systems-both retain identical SMC packaging and surge handling capability.
Availability
SMC3K26CA-M3/9A is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom line interface protection, and consumer appliance control board applications requiring stable component supply and long-term sourcing continuity.
Supply support for SMC3K26CA-M3/9A 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, efficiency, and application-specific performance.
The SMC3K26CA-M3/9A belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered for rugged transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the standoff voltage rating of the SMC3K26CA-M3/9A?
The SMC3K26CA-M3/9A has a standoff voltage (VWM) of 26 V, meaning it remains non-conductive up to this reverse voltage with leakage current limited to ≤2 μA. This rating ensures compatibility with 24 V nominal systems while providing sufficient margin before avalanche onset at 28.9 V minimum breakdown.
Is the SMC3K26CA-M3/9A suitable for automotive applications?
Yes, the SMC3K26CA-M3/9A is AEC-Q101 qualified and designed for automotive use, including engine control modules and body electronics. However, for new automotive designs, Vishay recommends the SMC3K26CAHM3/9A variant, which carries full AEC-Q101 documentation and qualification evidence aligned with latest automotive standards.
Does the SMC3K26CA-M3/9A have polarity markings on the package?
No, the SMC3K26CA-M3/9A is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) case. Both terminals are functionally identical, enabling flexible PCB layout without orientation constraints-critical for differential or floating-line protection schemes.
What is the maximum clamping voltage of the SMC3K26CA-M3/9A under surge conditions?
The SMC3K26CA-M3/9A clamps to a maximum of 42.1 V when subjected to its rated peak pulse current of 71.3 A (10/1000 μs waveform). This clamping voltage is guaranteed across temperature and lifetime, ensuring predictable protection for downstream 30 V-rated ICs and power stages.
Can the SMC3K26CA-M3/9A be used in lead-free reflow processes?
Yes, the SMC3K26CA-M3/9A is rated for MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, making it fully compatible with standard lead-free soldering profiles without preconditioning.
SMC3K26CA-M3/9A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 71.3A
- Power - Peak Pulse:
- 3000W (3kW)
- 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 (SMCJ)
SMC3K26CA-M3/9A FAQ
1.How can I place an order for SMC3K26CA-M3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K26CA-M3/9A 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 SMC3K26CA-M3/9A reliable?
The price and inventory of SMC3K26CA-M3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K26CA-M3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K26CA-M3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K26CA-M3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K26CA-M3/9A?
SMC3K26CA-M3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K26CA-M3/9A 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 SMC3K26CA-M3/9A?
For technical support, including SMC3K26CA-M3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K26CA-M3/9A requirements.
6.How does Aetrix verify that SMC3K26CA-M3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K26CA-M3/9A 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 SMC3K26CA-M3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K26CA-M3/9A?
All SMC3K26CA-M3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K26CA-M3/9A, 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 SMC3K26CA-M3/9A part is unused and in its original packaging.
Return procedure for SMC3K26CA-M3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K26CA-M3/9A Tags
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