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Vishay General Semiconductor - Diodes Division SMCJ26CA/57T
- Part No.:
- SMCJ26CA/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CA/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,356
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Product details
Overview
SMCJ26CA/57T from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 26 V stand-off voltage (VWM), 42.1 V maximum clamping voltage (VC) at 35.6 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) under 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ26CA/57T datasheet, SMCJ26CA/57T pinout, SMCJ26CA/57T application, or SMCJ26CA/57T equivalent, key selection criteria include verified bi-directional clamping performance, AEC-Q101 qualification, UL 497B recognition, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ26CA/57T operates as a voltage-clamping device using an avalanche breakdown mechanism, with symmetrical electrical characteristics in both directions due to its bi-directional construction. Its 28.9 V to 31.9 V breakdown voltage range (VBR) at 1 mA test current ensures reliable triggering above normal operating voltage while maintaining low leakage (<1.0 µA at VWM).
Thermally, it exhibits a junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W on recommended pad layout, enabling effective surge energy dissipation without external heatsinking. It supports continuous operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum reverse stand-off voltage before significant conduction begins; defines upper limit of normal circuit operation |
| VBR min/max | 28.9 V / 31.9 V at 1 mA - guaranteed avalanche initiation window ensuring consistent turn-on across production lots |
| VC @ IPPM | 42.1 V at 35.6 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected ICs |
| PPPM | 1500 W - peak transient power handling capability; validates protection against IEC 61000-4-5 Level 4 surges |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - enables use in under-hood automotive environments and high-temperature industrial enclosures |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Bi-directional terminals conduct surge current equally in either direction; no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| UL 497B recognized (QVGQ2) | Approved for telecom and industrial surge protector applications requiring safety agency certification |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without baking or special handling |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under repeated surge events |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump and inductive switching transients per ISO 7637-2. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt surge energy before reaching downstream regulators and microcontrollers. Use Value: Clamps 1500 W surges to ≤42.1 V, preventing latch-up or permanent damage to 3.3 V/5 V logic circuits powered from the rail. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory-floor pressure and temperature transmitters. IC Role / Device Role / Timing Role: Bi-directional transient suppressor mounted across signal and return paths to absorb EFT bursts and lightning-induced common-mode noise. Use Value: Symmetrical clamping ensures protection regardless of transient polarity; <1.0 µA leakage avoids calibration drift in precision measurement circuits. |
| Telecom Interface Protection | Consumer Device USB/Power Port Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul modules from induced surges on long cable runs. IC Role / Device Role / Timing Role: Standoff-rated TVS placed differential-mode across A/B bus lines to clamp common-mode transients without disrupting data integrity. Use Value: 26 V VWM aligns with typical RS-485 common-mode range; 42.1 V VC stays below absolute maximum ratings of compliant transceivers. | Use Scenario: Hardening DC input jacks and USB VBUS lines in smart home hubs against AC adapter faults and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on unregulated 5–12 V input rails, coordinated with secondary polymer PTC or eFuse for fault containment. Use Value: 1500 W PPPM handles sustained overvoltage conditions (e.g., wrong adapter insertion); RoHS-compliant and halogen-free construction meets regional compliance mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), higher RθJA (110 °C/W) | Suitable for lower-energy surges; limited to PCBs with minimal copper area or space-constrained layouts | Select when board area is critical and surge threat level is Class II (IEC 61000-4-5) |
| 1.5KE26CA | Through-hole TO-218 package, same 26 V VWM and 42.1 V VC, but higher IPPM (43.3 A) and PPPM (1500 W) | Requires wave soldering or hand assembly; not compatible with automated SMT lines | Choose for legacy through-hole designs or where mechanical robustness outweighs assembly efficiency |
Compared with SMBJ26CA and 1.5KE26CA, the SMCJ26CA/57T delivers identical clamping performance in a surface-mount DO-214AB package optimized for high-volume automotive and industrial SMT production, with AEC-Q101 qualification and UL recognition not shared by the SMBJ variant.
Availability
SMCJ26CA/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom infrastructure projects requiring stable component supply and long-term lifecycle assurance.
Supply support for SMCJ26CA/57T 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in harsh environments - emphasizing AEC-Q101 compliance, UL safety recognition, and repeatable clamping performance under repetitive surge stress.
FAQ
What is the breakdown voltage range of the SMCJ26CA/57T?
The SMCJ26CA/57T has a minimum breakdown voltage (VBR) of 28.9 V and a maximum of 31.9 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This range ensures reliable and repeatable avalanche conduction onset across temperature and manufacturing variance, and is confirmed in the Vishay datasheet document 88394, page 2.
Is the SMCJ26CA/57T suitable for automotive applications?
Yes, the SMCJ26CA/57T is AEC-Q101 qualified and rated for operation from –55 °C to +150 °C, making it suitable for under-hood and chassis-mounted automotive systems. Its UL 497B recognition and 1500 W surge rating align with ISO 7637-2 load dump and inductive switching requirements commonly found in ECUs and body control modules.
Does the SMCJ26CA/57T have polarity markings?
No, the SMCJ26CA/57T is a bi-directional TVS diode and carries no cathode band or polarity marking on the DO-214AB package. Its symmetrical construction allows installation in either orientation across protected lines, simplifying layout and eliminating risk of reverse installation errors during assembly.
What is the maximum clamping voltage of the SMCJ26CA/57T under surge conditions?
The SMCJ26CA/57T clamps to a maximum of 42.1 V at its rated peak pulse current of 35.6 A (10/1000 µs waveform). This value is specified in the Vishay datasheet (document 88394, page 2) and represents the worst-case voltage seen by downstream circuitry during standardized surge events.
What packaging format is used for the SMCJ26CA/57T?
The SMCJ26CA/57T is supplied in 7-inch plastic tape and reel format (package code 57T), with 850 units per reel. The tape complies with EIA-481 standards and is optimized for high-speed pick-and-place equipment, supporting automated SMT assembly without manual handling or rework.
SMCJ26CA/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- 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:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ26CA/57T FAQ
1.How can I place an order for SMCJ26CA/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CA/57T 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 SMCJ26CA/57T reliable?
The price and inventory of SMCJ26CA/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CA/57T is usually 5 days.
3.What payment methods are accepted for SMCJ26CA/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CA/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CA/57T?
SMCJ26CA/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CA/57T 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 SMCJ26CA/57T?
For technical support, including SMCJ26CA/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CA/57T requirements.
6.How does Aetrix verify that SMCJ26CA/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ26CA/57T 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 SMCJ26CA/57T meets industry standards.
7.What is the process for return or replacement of SMCJ26CA/57T?
All SMCJ26CA/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CA/57T, 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 SMCJ26CA/57T part is unused and in its original packaging.
Return procedure for SMCJ26CA/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CA/57T Tags
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