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Vishay General Semiconductor - Diodes Division SMC5K26CA-M3/I
- Part No.:
- SMC5K26CA-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K26CA-M3/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,439
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Product details
Overview
SMC5K26CA-M3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 5000 W peak pulse power (10/1000 μs), 42.1 V clamping voltage at 119 A, and 26 V stand-off voltage. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics against lightning and inductive switching transients.
For engineers reviewing the SMC5K26CA-M3/I datasheet, SMC5K26CA-M3/I pinout, SMC5K26CA-M3/I application, or SMC5K26CA-M3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance values, junction capacitance behavior, and real-world clamping performance under standardized 10/1000 μs and 8/20 μs waveforms.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, triggering when reverse voltage exceeds its 28.9–31.9 V breakdown range (at 1 mA), then limiting transient energy by diverting current to ground while maintaining ≤42.1 V across protected circuitry. Its bidirectional symmetry enables AC-line and differential-signal protection without polarity constraints.
Thermal design relies on low junction-to-mount thermal resistance (4.0 °C/W) and 175 °C maximum junction temperature, enabling robust operation in high-temperature automotive engine bays and industrial motor drives. The device meets IEC 61000-4-2 ESD immunity up to 30 kV (contact/air mode) and UL 497B safety recognition (E136766).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 26 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC bias margin for protected line. |
| Breakdown Voltage (VBR) | 28.9–31.9 V at 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on before downstream component damage thresholds. |
| Clamping Voltage (VC) | 42.1 V at 119 A (10/1000 μs) - Measured voltage during worst-case surge; determines actual stress on protected IC or MOSFET. |
| Peak Pulse Power (PPPM) | 5000 W (10/1000 μs) - Energy-handling capacity for standard lightning surges; validates suitability for IEC 61000-4-5 Level 4 compliance designs. |
| Junction Temperature Range | −55 °C to +175 °C - Enables deployment in under-hood automotive, industrial inverters, and outdoor telecom equipment without derating. |
| ESD Immunity | 30 kV per IEC 61000-4-2 (contact/air) - Confirmed static discharge robustness for handling and board-level integration in unshielded environments. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no cathode band. Matte tin-plated leads, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak), JESD 201 Class 2 whisker resistant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path terminal | Identical bidirectional terminals - either end connects to protected line; no polarity orientation required during placement. |
| Cathode / Anode (symmetrical) | Transient current path terminal | Same physical terminal as above - dual-terminal symmetry eliminates layout polarity constraints and simplifies PCB routing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded power rails without polarity concerns. |
| 40 kW surge rating (8/20 μs) | Supports high-current lightning surge suppression per IEC 61000-4-5, delivering 717 A peak pulse current capability. |
| AEC-Q101 qualification | Validated reliability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for sensitive gate drivers. |
| UL 497B recognition (E136766) | Meets safety agency requirements for telecom and industrial interface protection, reducing certification effort for end equipment. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and junction box controllers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed at input filter stage to clamp spikes before DC-DC converters and microcontrollers. Use Value: Withstands 5000 W surges and operates up to 175 °C, ensuring uninterrupted function during engine cranking and hot ambient conditions. |
Use Scenario: Safeguarding gate driver inputs and feedback signal lines in variable-frequency drives exposed to IGBT switching noise. IC Role / Device Role / Timing Role: Fast-response voltage clamp on isolated analog feedback paths and PWM enable lines to prevent false triggering. Use Value: 42.1 V clamping at 119 A limits induced overvoltage to levels below gate oxide breakdown thresholds of 600 V IGBT drivers. |
| Telecom Line Interface Protection | Consumer Sensor Signal Conditioning |
|
Use Scenario: Shielding Ethernet PHYs and PoE injectors from induced surges on outdoor cabling per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-level TVS on RJ45 magnetics secondary side, coordinated with secondary-stage GDTs and polymer PTCs. Use Value: Bidirectional symmetry supports full-duplex data lines; 30 kV ESD rating prevents latch-up during connector hot-plug events. |
Use Scenario: Securing analog outputs of MEMS pressure sensors in HVAC and appliance control boards against ESD and relay bounce. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) shunt protector on 0–5 V output lines to preserve signal integrity and bandwidth. Use Value: Clamps transients within nanoseconds while adding <1 pF parasitic capacitance at signal frequencies up to 1 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (smaller footprint), same VWM/VBR range, higher RthJA (125 °C/W). | Targeted for space-constrained consumer PCBs where surge severity is lower (IEC 61000-4-2 only, not 4-5). | Select when board area is critical and peak surge energy does not exceed 400 W; verify thermal margin in enclosed enclosures. |
| 1.5KE27CA (ON Semiconductor) | Through-hole DO-201 package, 1500 W PPPM, similar VWM/VBR but higher clamping (45.7 V @ 65.3 A), no AEC-Q101 qualification. | Suitable for legacy industrial power supplies and non-automotive replacements where reflow compatibility is not required. | Choose for cost-sensitive through-hole production or where existing DO-201 footprints must be retained; avoid in automotive or high-reliability deployments. |
Compared with SMC5K26CA-M3/I, SMAJ26CA-E3/5A trades surge capacity and thermal performance for compact size, while 1.5KE27CA sacrifices surface-mount compatibility and automotive qualification for lower unit cost in non-critical applications.
Availability
SMC5K26CA-M3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom line interface protection, and consumer sensor signal conditioning requiring stable component supply across extended temperature ranges and high-reliability certifications.
Supply support for SMC5K26CA-M3/I 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 SMC5KxxCA series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems demanding AEC-Q101 qualification, UL safety recognition, and validated 5000 W surge capability.
FAQ
What is the breakdown voltage range of the SMC5K26CA-M3/I?
The SMC5K26CA-M3/I has a specified breakdown voltage (VBR) range of 28.9 V to 31.9 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This range ensures consistent avalanche initiation across production lots and guarantees reliable clamping onset before protected components reach failure thresholds. The SMC5K26CA-M3/I maintains this specification across its full operating temperature range of −55 °C to +175 °C.
Is the SMC5K26CA-M3/I suitable for automotive applications?
Yes, the SMC5K26CA-M3/I is AEC-Q101 qualified and rated for operation from −55 °C to +175 °C, making it suitable for under-hood and powertrain applications including battery management systems, body control modules, and ADAS power supplies. Its 5000 W peak pulse power rating and 30 kV ESD immunity meet stringent automotive EMC requirements. The SMC5K26CA-M3/I also carries UL 497B recognition (E136766) for added system-level safety validation.
What is the clamping voltage of the SMC5K26CA-M3/I at its rated peak pulse current?
The SMC5K26CA-M3/I clamps to a maximum of 42.1 V at 119 A under the standard 10/1000 μs waveform, as confirmed in the Vishay datasheet (Document Number: 87024). This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events and is critical for verifying margin against downstream IC absolute maximum ratings. The SMC5K26CA-M3/I achieves this with low incremental surge resistance, minimizing overshoot during fast transients.
Does the SMC5K26CA-M3/I have polarity markings?
No, the SMC5K26CA-M3/I is a bidirectional TVS diode and features no cathode band or polarity marking on its SMC (DO-214AB) package. Its symmetrical construction allows either terminal to serve as anode or cathode depending on transient polarity, simplifying PCB layout and eliminating orientation errors during automated assembly. This characteristic is explicitly noted in the Vishay datasheet mechanical section and applies to all CA-suffixed variants in the SMC5KxxCA family.
What packaging option does the SMC5K26CA-M3/I use?
The SMC5K26CA-M3/I is supplied in 13-inch diameter plastic tape and reel format, with a base quantity of 3500 units per reel. The "M3" suffix denotes halogen-free, RoHS-compliant, industrial-grade construction, while the "I" indicates the 13″ reel packaging variant. This packaging supports high-volume SMT placement and complies with J-STD-002 and JESD 22-B102 solderability standards, with matte tin-plated leads qualified for JESD 201 Class 2 whisker resistance.
SMC5K26CA-M3/I 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):
- 119A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC5K26CA-M3/I FAQ
1.How can I place an order for SMC5K26CA-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K26CA-M3/I 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 SMC5K26CA-M3/I reliable?
The price and inventory of SMC5K26CA-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC5K26CA-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K26CA-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K26CA-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K26CA-M3/I?
SMC5K26CA-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K26CA-M3/I 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 SMC5K26CA-M3/I?
For technical support, including SMC5K26CA-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K26CA-M3/I requirements.
6.How does Aetrix verify that SMC5K26CA-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K26CA-M3/I 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 SMC5K26CA-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K26CA-M3/I?
All SMC5K26CA-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K26CA-M3/I, 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 SMC5K26CA-M3/I part is unused and in its original packaging.
Return procedure for SMC5K26CA-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K26CA-M3/I Tags
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