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Vishay General Semiconductor - Diodes Division SMCJ26C-E3/9AT
- Part No.:
- SMCJ26C-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26C-E3/9AT.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,805
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Product details
Overview
SMCJ26C-E3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for clamping voltage transients on signal or power lines. It features 26 V stand-off voltage (VWM), 42.1 V maximum clamping voltage at 35.6 A peak pulse current, 1500 W peak pulse power rating, and AEC-Q101 qualification for automotive reliability.
For engineers reviewing the SMCJ26C-E3/9AT datasheet, SMCJ26C-E3/9AT pinout, SMCJ26C-E3/9AT application, or SMCJ26C-E3/9AT equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O modules, and telecom line drivers where bidirectional clamping, low leakage (<1 μA at 26 V), and MSL Level 1 reflow compatibility are required.
Technical Context
The SMCJ26C-E3/9AT operates as a bi-directional avalanche diode with symmetrical breakdown characteristics - minimum breakdown voltage 28.9 V and maximum 31.9 V at 1 mA test current. Its clamping action begins at VWM = 26 V and limits transient energy within a 10/1000 μs waveform envelope, delivering stable protection without polarity sensitivity.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling effective heat dissipation when mounted on 8.0 mm × 8.0 mm copper pads per terminal. The device sustains operation from –55 °C to +150 °C junction temperature and meets J-STD-020 MSL Level 1 with 260 °C peak reflow profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe working range for protected circuitry. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed symmetrical avalanche onset in both directions; ensures predictable turn-on behavior. |
| VC @ IPPM | 42.1 V at 35.6 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients like ISO 7637-2 Pulse 1/2/5a in automotive systems. |
| ID @ VWM | <1 μA - Ultra-low reverse leakage at rated stand-off voltage; avoids signal integrity degradation in high-impedance sensor paths. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| Package | DO-214AB (SMCJ) - Surface-mount, low-profile package with matte tin-plated leads; compatible with automated placement and J-STD-002 soldering. |
Pinout & Package
SMCJ26C-E3/9AT is a two-terminal bi-directional TVS diode in DO-214AB (SMCJ) package. No polarity marking is applied, as electrical behavior is identical in both directions. Terminals are matte tin-plated leads suitable for reflow soldering per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bi-directional avalanche junction | Either terminal serves as input/output for transient suppression; no cathode band or polarity identification required. |
| Case (body) | Non-electrical mechanical interface | DO-214AB molded body provides UL 94 V-0 flammability rating and mechanical stability during board flex or thermal cycling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under humidity and thermal stress versus epoxy-passivated alternatives. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio ≈ 1.47) and faster response to fast-rising transients (sub-nanosecond). |
| 1500 W peak pulse power | Supports protection against severe surges such as lightning-induced coupling or inductive switching spikes in 24 V industrial buses. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across differential or single-ended signal lines upstream of the interface IC. Use Value: Limits transient voltage to ≤42.1 V while maintaining <1 μA leakage at 26 V, preserving signal fidelity and preventing latch-up in 3.3 V/5 V receivers. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to 24 V DC field wiring with inductive load switching. IC Role / Device Role / Timing Role: Primary surge suppression element connected between input line and ground, absorbing ISO 16750-2 Pulse 4 energy. Use Value: Withstands 1500 W peak pulses and clamps to 42.1 V, ensuring downstream optocouplers and microcontrollers remain within absolute maximum ratings. |
| Telecom Line Driver Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Shielding RS-485/RS-422 transceivers in base station backhaul equipment from induced surges on long-distance twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional TVS placed differentially across A/B lines and common-mode to ground. Use Value: Symmetrical VBR (28.9–31.9 V) ensures balanced clamping; 75 °C/W RθJA allows thermal management without heatsinking in compact modules. |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters for smart home devices, guarding against capacitor failure or regulator fault conditions. IC Role / Device Role / Timing Role: Standoff-rated clamp across DC output rails (e.g., 24 V output) to prevent damage to USB-PD controllers or MCU power domains. Use Value: 26 V VWM aligns with typical 24 V nominal outputs; 42.1 V VC prevents downstream component overstress during sustained overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC26C-TB-E3/9AT | Same VWM (26 V) and VC (42.1 V), but lower PPPM (1000 W); uses smaller DO-214AA (SMA) package. | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-current inductive switching. | Select only when space constraints prohibit DO-214AB and surge threat level is below 1000 W. |
| SMCJ26CAHE3/9AT | Identical electrical specs and DO-214AB package, but AEC-Q101 qualified variant with HE3 suffix (JESD 201 Class 2 whisker resistance). | Required for automotive safety-critical modules requiring extended whisker reliability beyond commercial-grade E3. | Choose SMCJ26CAHE3/9AT when full AEC-Q101 compliance documentation and whisker testing traceability are mandated. |
Compared with SMCJ26C-E3/9AT, SAC26C-TB-E3/9AT trades power handling for footprint reduction, while SMCJ26CAHE3/9AT adds whisker reliability assurance without altering clamping performance - enabling selection based on mechanical, environmental, or certification requirements rather than electrical function.
Availability
SMCJ26C-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line driver circuits requiring stable component supply, RoHS-compliant packaging, and MSL Level 1 reflow compatibility.
Supply support for SMCJ26C-E3/9AT 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, efficiency, and application-specific optimization.
The SMCJ series was developed for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 validation, and precise clamping performance are mandatory.
FAQ
What is the breakdown voltage range of the SMCJ26C-E3/9AT?
The SMCJ26C-E3/9AT has a guaranteed breakdown voltage (VBR) range of 28.9 V to 31.9 V at 1 mA test current, measured in both directions due to its bi-directional construction. This symmetric specification ensures consistent clamping behavior regardless of transient polarity, and is confirmed per Vishay Document Number 88394, page 2.
Is the SMCJ26C-E3/9AT suitable for automotive applications?
Yes, the SMCJ26C-E3/9AT is RoHS-compliant and qualified to AEC-Q101 standards, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its DO-214AB package, MSL Level 1 rating, and –55 °C to +150 °C operating range meet stringent automotive environmental requirements.
What does the "C" in SMCJ26C-E3/9AT signify?
The "C" in SMCJ26C-E3/9AT denotes bi-directional functionality, distinguishing it from uni-directional variants (e.g., SMCJ26A). As confirmed in Vishay's datasheet, bi-directional devices exhibit identical electrical characteristics in both polarities and carry no cathode band marking - critical for protecting AC-coupled or differential signal paths.
How does the clamping voltage of SMCJ26C-E3/9AT compare to its stand-off voltage?
The SMCJ26C-E3/9AT has a stand-off 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 headroom ensures protected ICs experience minimal overvoltage during surge events, while the VC/VWM ratio of ~1.62 reflects strong clamping efficiency for a 1500 W TVS device.
What is the thermal resistance of the SMCJ26C-E3/9AT?
The SMCJ26C-E3/9AT 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 8.0 mm × 8.0 mm copper pads per terminal. These values enable reliable operation up to +150 °C junction temperature without forced cooling in standard PCB layouts.
SMCJ26C-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 32.2A
- 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 (SMCJ)
SMCJ26C-E3/9AT FAQ
1.How can I place an order for SMCJ26C-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26C-E3/9AT 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 SMCJ26C-E3/9AT reliable?
The price and inventory of SMCJ26C-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26C-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ26C-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26C-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26C-E3/9AT?
SMCJ26C-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26C-E3/9AT 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 SMCJ26C-E3/9AT?
For technical support, including SMCJ26C-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26C-E3/9AT requirements.
6.How does Aetrix verify that SMCJ26C-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ26C-E3/9AT 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 SMCJ26C-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ26C-E3/9AT?
All SMCJ26C-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26C-E3/9AT, 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 SMCJ26C-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ26C-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26C-E3/9AT Tags
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