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Vishay General Semiconductor - Diodes Division SMC5K26CA-M3/H
- Part No.:
- SMC5K26CA-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K26CA-M3/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
SMC5K26CA-M3/H 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), 26 V stand-off voltage, and 42.1 V clamping voltage at 119 A. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMC5K26CA-M3/H datasheet, SMC5K26CA-M3/H pinout, SMC5K26CA-M3/H application, or SMC5K26CA-M3/H equivalent, key selection criteria include its AEC-Q101 qualification, bidirectional polarity, 175 °C max junction temperature, low incremental surge resistance, and UL 497B safety recognition - all critical for robust overvoltage protection in harsh environments.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by transient overvoltages exceeding its 26 V reverse stand-off voltage (VWM). Its breakdown occurs between 28.9 V and 31.9 V at 1 mA test current, enabling precise threshold control before clamping begins.
The device delivers 5000 W peak pulse power under 10/1000 μs waveform and sustains up to 40 kW under 8/20 μs surge conditions. Its thermal resistance junction-to-mount is 4.0 °C/W, supporting high-reliability operation in thermally constrained PCB layouts.
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 - Breakdown voltage range at 1 mA, defining turn-on threshold tolerance |
| VC @ IPPM | 42.1 V at 119 A - Clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 5000 W - Peak pulse power handling capability, enabling protection against IEC 61000-4-5 surges |
| TJ max | +175 °C - Maximum junction temperature, supporting operation in under-hood automotive and industrial enclosures |
| ESD rating | ±30 kV HBM - Robust electrostatic discharge immunity per IEC 61000-4-2, reducing board-level ESD hardening needs |
| Polarity | Bidirectional - Symmetric clamping for AC-coupled or floating signal lines without polarity constraints |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, M3 grade - optimized for automated assembly and industrial reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient current return path | Bidirectional design means both terminals function identically; no cathode band marking required |
| Anode (Cathode) | Transient current entry point | Terminal symmetry enables placement flexibility on PCB without orientation dependency |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| UL 497B recognized | Meets safety standards for telecom and industrial signal line protection with file E136766 |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| 175 °C TJ max | Enables use in high-ambient-temperature environments such as engine control units and motor drives |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power rails feeding ECUs and body control modules from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS device placed across input rail and ground to shunt surge energy before reaching downstream regulators and microcontrollers. Use Value: Withstands 5000 W pulses and clamps at 42.1 V, preventing damage to 36 V-rated DC-DC converters and ensuring system uptime. | Use Scenario: Safeguarding analog output lines of pressure and temperature sensors in factory automation systems exposed to relay-induced spikes. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential or single-ended signal paths to suppress common-mode and differential-mode transients. Use Value: 26 V VWM matches typical 24 V sensor supply rails; ±30 kV ESD rating eliminates need for additional discrete ESD components. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Front-end protection for Ethernet PHY interfaces and DSL line drivers subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at connector entry point to divert 8/20 μs transients before signal conditioning circuitry. Use Value: 40 kW surge capability at 8/20 μs enables compliance with Level 4 surge immunity requirements without cascaded protection stages. | Use Scenario: Input stage protection for BLDC motor controllers in washing machines and HVAC systems where brushed motor commutation generates repetitive spikes. IC Role / Device Role / Timing Role: Fast-response clamping diode across DC bus inputs to absorb repetitive 10/1000 μs transients from inductive kickback. Use Value: 119 A peak pulse current rating and 4.0 °C/W RthJM ensure thermal stability during frequent surge events in cyclic appliance operation. |
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 | Lower PPPM (400 W), same VWM (26 V), SMA package (smaller footprint, lower thermal mass) | Not suitable for 5000 W surge events; limited to low-energy consumer interfaces | Select SMC5K26CA-M3/H when 5000 W clamping and AEC-Q101 qualification are required |
| SMC5K26A-M3/H | Unidirectional version - same VWM, VBR, and PPPM but asymmetric clamping (cathode-marked) | Requires correct polarity placement; unsuitable for AC or floating signal lines | Choose SMC5K26CA-M3/H for bidirectional protection where polarity is undefined or alternating |
Compared with SMAJ26CA and SMC5K26A-M3/H, the SMC5K26CA-M3/H uniquely combines 5000 W surge capacity, bidirectional symmetry, AEC-Q101 qualification, and UL 497B recognition - making it the only option among the three validated for automotive power rail and industrial 24 V system protection.
Availability
SMC5K26CA-M3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom line card surge protection requiring stable component supply and long-term lifecycle support.
Supply support for SMC5K26CA-M3/H 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 for high-reliability applications across automotive, industrial, and computing markets.
The SMC5KxxCA series targets high-energy transient suppression in demanding environments, with emphasis on AEC-Q101 qualification, UL safety certification, and robust thermal performance in SMC packaging.
FAQ
What is the maximum clamping voltage of the SMC5K26CA-M3/H under a 10/1000 μs surge?
The SMC5K26CA-M3/H has a maximum clamping voltage (VC) of 42.1 V at 119 A under a 10/1000 μs waveform. This value is specified in the Vishay datasheet Document Number 87024 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The SMC5K26CA-M3/H maintains this clamping performance across its full operating temperature range.
Is the SMC5K26CA-M3/H suitable for automotive applications?
Yes, the SMC5K26CA-M3/H is AEC-Q101 qualified and rated for operation from -55 °C to +175 °C, making it suitable for under-hood and powertrain applications. Its UL 497B recognition, 5000 W surge rating, and MSL Level 1 reflow compatibility further validate its use in automotive ECUs and body control modules. The SMC5K26CA-M3/H meets stringent reliability requirements defined in the AEC-Q101 standard.
What does the "CA" suffix indicate in SMC5K26CA-M3/H?
The "CA" suffix in SMC5K26CA-M3/H denotes a bidirectional Transient Voltage Suppressor configuration. Unlike unidirectional variants (e.g., SMC5K26A-M3/H), the CA version provides symmetrical clamping for both positive and negative transients without polarity dependence. This allows flexible PCB placement and eliminates orientation constraints during assembly of the SMC5K26CA-M3/H.
Does the SMC5K26CA-M3/H have a cathode marking?
No, the SMC5K26CA-M3/H does not have a cathode band or polarity marking because it is a bidirectional TVS diode. Both terminals are functionally identical, and the device clamps symmetrically for voltage excursions in either direction. This absence of marking simplifies layout and reduces assembly errors compared to unidirectional versions of the SMC5K26CA-M3/H.
What is the thermal resistance specification for the SMC5K26CA-M3/H?
The SMC5K26CA-M3/H has a junction-to-mount thermal resistance (RthJM) of 4.0 °C/W and a junction-to-ambient resistance (RthJA) of 90 °C/W when mounted on a standard FR4 PCB per JEDEC 51-2A. These values enable effective heat dissipation during repeated surge events and support reliable operation at elevated ambient temperatures. The SMC5K26CA-M3/H's low RthJM is critical for high-power transient absorption.
SMC5K26CA-M3/H 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/H FAQ
1.How can I place an order for SMC5K26CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K26CA-M3/H 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/H reliable?
The price and inventory of SMC5K26CA-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMC5K26CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K26CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K26CA-M3/H?
SMC5K26CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K26CA-M3/H 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/H?
For technical support, including SMC5K26CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K26CA-M3/H requirements.
6.How does Aetrix verify that SMC5K26CA-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K26CA-M3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMC5K26CA-M3/H?
All SMC5K26CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K26CA-M3/H, 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/H part is unused and in its original packaging.
Return procedure for SMC5K26CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K26CA-M3/H Tags
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