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Vishay General Semiconductor - Diodes Division SMCJ26A-E3/57T
- Part No.:
- SMCJ26A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26A-E3/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,470
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Product details
Overview
SMCJ26A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA test current, 42.1 V maximum clamping voltage (VC) at 35.6 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 μs waveform.
For engineers reviewing the SMCJ26A-E3/57T datasheet, SMCJ26A-E3/57T pinout, SMCJ26A-E3/57T application, or SMCJ26A-E3/57T equivalent, key selection criteria include clamping performance under 35.6 A surge, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking (cathode band), RoHS-compliant matte tin plating, and compatibility with automated placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ26A-E3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to clamp transient overvoltages before they damage downstream ICs or MOSFETs. Its unidirectional configuration enables protection of DC-biased signal or power lines where reverse conduction must be blocked.
It meets MSL Level 1 per J-STD-020 (peak reflow temperature 260 °C), supports 200 A non-repetitive forward surge current (IFSM), and maintains stable operation across -55 °C to +150 °C junction temperature range. The device is rated for 1.0 μA maximum reverse leakage at VWM and exhibits 0.097 %/°C temperature coefficient of VBR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR min/max | 28.9 V / 31.9 V at IT = 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 42.1 V at 35.6 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 1500 W - Peak transient energy handling capacity; validates robustness against IEC 61000-4-5 Level 4 surges. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads; informs derating above 25 °C ambient. |
| IFSM | 200 A - Single half-sine surge rating (8.3 ms); supports protection of power rails subject to motor or relay switching events. |
| Polarity | Unidirectional - Cathode marked with band; blocks reverse current while clamping positive transients on anode-cathode path. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (unidirectional) | Connected to line being protected; conducts surge current toward cathode during overvoltage event. |
| Cathode | Transient current exit point (marked with band) | Connected to ground or lower-potential reference; establishes unidirectional clamping direction and polarity identification. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress without parameter drift. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision and reducing stress on downstream components. |
| MSL Level 1 compliance | Enables direct placement into standard SMT reflow processes without moisture sensitivity concerns or baking requirements. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental regulations; suitable for consumer, industrial, and telecom applications without automotive qualification overhead. |
| Automated placement optimized | Standardized SMC footprint and lead geometry support high-yield pick-and-place assembly on production lines. |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O lines in PLC output modules subjected to inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Unidirectional TVS placed between driver output and ground to clamp negative flyback spikes before they reach logic-level inputs. Use Value: Limits transient voltage to ≤42.1 V during 35.6 A surges, preventing latch-up or permanent damage to 3.3 V/5 V interface ICs. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails in door control modules exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO regulators, absorbing short-duration energy bursts without affecting steady-state regulation. Use Value: Withstands 1500 W peak pulses while maintaining 26 V operating margin, ensuring uninterrupted communication during battery transients. |
| Telecom Power Interfaces | Consumer USB-C Power Delivery |
|
Use Scenario: Input-stage protection for AC/DC adapters and PoE injectors handling lightning-induced surges on primary-side DC rails. IC Role / Device Role / Timing Role: Primary-side TVS on bulk capacitor input, clamping common-mode transients before they propagate to isolation barriers or controller ICs. Use Value: Fast <1 ns response and 75 °C/W thermal resistance enable effective energy diversion without thermal runaway under repeated 10/1000 μs events. |
Use Scenario: Overvoltage guard on VBUS lines in portable device charging circuits vulnerable to adapter fault conditions or hot-plug transients. IC Role / Device Role / Timing Role: Unidirectional suppressor between VBUS and GND, activated only during positive overvoltage events while blocking reverse conduction. Use Value: 28.9–31.9 V VBR window aligns with USB PD 3.0 20 V profile, providing precise clamping without false triggering during normal 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 |
|---|---|---|---|
| SAC26A-TB-E3/57T | Same VWM (26 V), but lower PPPM (600 W) and higher VC (45.7 V at 13.1 A); smaller SOD-123FL package. | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4; preferred where board space is constrained and surge severity is moderate. | Select SAC26A-TB-E3/57T only when peak surge current remains below 13.1 A and PCB area is critical. |
| 1.5KE27A | Through-hole DO-201 package; same VWM (27 V), slightly higher VC (43.0 V at 35.0 A); identical PPPM (1500 W). | Requires wave soldering or hand assembly; not compatible with automated SMT lines; better heat sinking via leads but larger footprint. | Choose 1.5KE27A only for legacy through-hole designs or where mechanical robustness outweighs SMT efficiency. |
Compared with SAC26A-TB-E3/57T and 1.5KE27A, the SMCJ26A-E3/57T delivers optimal balance of high-energy surge handling (1500 W), compact SMC footprint, and automated manufacturability-making it the preferred choice for new SMT-based industrial and automotive power interface designs requiring repeatable, high-volume production.
Availability
SMCJ26A-E3/57T is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, telecom power interfaces, and consumer USB-C power delivery applications requiring stable component supply, consistent surge performance, and RoHS-compliant manufacturing.
Supply support for SMCJ26A-E3/57T 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMCJ series was developed to deliver high-power, surface-mount transient suppression for demanding industrial and automotive environments where compact size, repeatable clamping, and process compatibility are essential.
FAQ
What is the maximum clamping voltage of the SMCJ26A-E3/57T under a 10/1000 μs surge?
The SMCJ26A-E3/57T has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 35.6 A using the standard 10/1000 μs waveform. This value is measured at the device terminals under specified test conditions (mounted on 8.0 mm × 8.0 mm copper pads) and represents the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMCJ26A-E3/57T maintains this clamping performance consistently across its operational temperature range.
Is the SMCJ26A-E3/57T suitable for automotive applications requiring AEC-Q101 qualification?
No, the SMCJ26A-E3/57T is a commercial-grade part with E3 suffix (RoHS-compliant, non-automotive). For AEC-Q101 qualified versions, Vishay offers the SMCJ26AHE3 variant (with HE3 suffix), which undergoes additional stress testing and screening per the AEC-Q101 standard. The SMCJ26A-E3/57T itself does not carry AEC-Q101 certification and should not be used in safety-critical automotive systems unless explicitly validated and approved by the end customer's qualification process.
How does the SMCJ26A-E3/57T differ from bidirectional variants like SMCJ26CA?
The SMCJ26A-E3/57T is unidirectional, featuring a cathode band marking and blocking reverse current flow, whereas SMCJ26CA is bidirectional with no polarity marking and symmetric clamping in both directions. The SMCJ26A-E3/57T has a 26 V standoff voltage (VWM) and 28.9–31.9 V breakdown (VBR), while SMCJ26CA shares identical VWM and VBR values but supports AC-coupled or floating-line protection. Their pinouts are identical, but circuit integration differs due to polarity requirements.
What is the thermal resistance and how does it affect layout design for the SMCJ26A-E3/57T?
The SMCJ26A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout: 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value directly impacts power derating-above 25 °C ambient, the device's surge capability decreases per Figure 2 in the datasheet. To maintain full 1500 W PPPM rating, designers must adhere to this pad size and ensure adequate copper area and minimal thermal isolation around the SMCJ26A-E3/57T footprint.
Can the SMCJ26A-E3/57T be used in place of older P6KE27A or 1N6267A parts?
The SMCJ26A-E3/57T provides comparable electrical performance (VWM ≈ 26 V, VC ≈ 42.1 V, PPPM = 1500 W) to P6KE27A and 1N6267A but in a smaller, surface-mount SMC package versus their axial DO-15 or DO-41 formats. While functionally similar for transient suppression, direct substitution requires verifying PCB layout compatibility, thermal management (RθJA differs significantly), and surge waveform alignment. The SMCJ26A-E3/57T is not a drop-in replacement due to package and mounting differences, though it serves the same protection role in modern SMT designs.
SMCJ26A-E3/57T 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:
- 1
- Bidirectional Channels:
- -
- 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:
- 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)
SMCJ26A-E3/57T FAQ
1.How can I place an order for SMCJ26A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26A-E3/57T 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 SMCJ26A-E3/57T reliable?
The price and inventory of SMCJ26A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ26A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26A-E3/57T?
SMCJ26A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26A-E3/57T 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 SMCJ26A-E3/57T?
For technical support, including SMCJ26A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26A-E3/57T requirements.
6.How does Aetrix verify that SMCJ26A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ26A-E3/57T 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 SMCJ26A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ26A-E3/57T?
All SMCJ26A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26A-E3/57T, 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 SMCJ26A-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ26A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26A-E3/57T Tags
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