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Vishay General Semiconductor - Diodes Division SMCJ26-E3/9AT
- Part No.:
- SMCJ26-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26-E3/9AT.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,237
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Product details
Overview
SMCJ26-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown range (VBR), 42.1 V clamping voltage at 35.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMCJ26-E3/9AT datasheet, SMCJ26-E3/9AT pinout, SMCJ26-E3/9AT application, or SMCJ26-E3/9AT equivalent, this device is selected for automotive power line surge suppression, industrial I/O port protection, and DC power rail transient immunity where high-energy clamping, AEC-Q101 qualification, and RoHS-compliant surface-mount reliability are required.
Technical Context
The SMCJ26-E3/9AT operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transients while remaining high-impedance under normal operation. Its glass-passivated junction ensures stable leakage (<1.0 µA at 26 V) and low incremental surge resistance for consistent clamping performance across temperature.
Rated for -55 °C to +150 °C junction temperature, it delivers 1500 W peak pulse power on standard 8.0 mm × 8.0 mm copper pads and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The E3 suffix confirms RoHS compliance and JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working limit. |
| VBR min/max | 28.9 V / 31.9 V - Breakdown occurs within this range at 1.0 mA test current; ensures predictable turn-on margin. |
| VC @ IPPM | 42.1 V - Clamped voltage at 35.6 A peak pulse current; determines maximum stress imposed on protected circuitry. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 µs waveform; supports high-energy lightning/surge events. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at rated standoff voltage; critical for low-power sensor and battery-backed systems. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended pad layout; informs PCB thermal design requirements. |
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. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge (rare in TVS use). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail); avalanches into conduction when voltage exceeds VBR to shunt surge energy. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per JEDEC standards. |
| Glass passivated junction | Ensures stable electrical characteristics over time and environmental stress, minimizing parameter drift in harsh conditions. |
| MSL Level 1 rating | Allows unlimited floor life and 260 °C peak reflow without baking-enables direct placement in high-volume SMT lines. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping accuracy and system-level ESD/lightning immunity. |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) surge testing in industrial and automotive applications. |
Applications
| Automotive Power Line Protection | Industrial Sensor I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) and body control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients exceeding 26 V. Use Value: Withstands 1500 W surges and maintains ≤1.0 µA leakage at 26 V, preserving low-quiescent-current design integrity. |
Use Scenario: Shielding analog and digital signal lines (e.g., CAN, LIN, thermistor inputs) in factory automation sensors from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on each signal trace to ground, activated only during >28.9 V transients. Use Value: 42.1 V clamping voltage limits downstream IC stress below absolute maximum ratings, preventing latch-up or damage. |
| DC Power Supply Input Protection | Telecom Equipment Surge Suppression |
Use Scenario: Front-end protection of AC/DC and DC/DC converters in PoE-powered devices and industrial power supplies. IC Role / Device Role / Timing Role: Primary surge limiter on input bus prior to filtering and regulation stages. Use Value: 35.6 A peak pulse current capability handles repetitive 10/1000 µs surges without degradation, ensuring long-term BOM stability. |
Use Scenario: Secondary-level protection on Ethernet PHY interfaces and line-card power inputs in base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response clamping element between data/power lines and ground plane per IEC 61000-4-5. Use Value: AEC-Q101 qualification and 1500 W rating meet telecom infrastructure reliability and safety certification requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/61T | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VBR range. | Not suitable for 1500 W surge events; limited to low-energy ESD and localized board-level transients. | Select only if space-constrained and surge threat level is ≤IEC 61000-4-2 Level 4 contact discharge. |
| SMCJ26AHE3/9AT | Identical electrical specs but HE3 suffix indicates AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. | Required for automotive safety-critical modules where extended whisker reliability is mandated beyond standard AEC-Q101. | Choose SMCJ26AHE3/9AT when full automotive qualification documentation and enhanced metallurgical reliability are contractually required. |
Compared with SMAJ26A-E3/61T and SMCJ26AHE3/9AT, the SMCJ26-E3/9AT provides optimal balance of high-energy surge handling (1500 W), industry-standard AEC-Q101 qualification, and cost-effective commercial-grade reliability-making it ideal for non-safety-critical automotive and industrial power rail protection.
Availability
SMCJ26-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom power supply protection requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SMCJ26-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 performance.
The SMCJ series belongs to Vishay's TRANSZORB® transient voltage suppressor family, engineered for high-energy surge immunity in automotive, industrial, and telecom systems where robustness and standardized qualification are mandatory.
FAQ
What is the clamping voltage of the SMCJ26-E3/9AT and how is it measured?
The SMCJ26-E3/9AT has a maximum clamping voltage (VC) of 42.1 V, measured at its peak pulse current (IPPM) of 35.6 A using a standardized 10/1000 µs double-exponential surge waveform. This value represents the upper voltage limit imposed on protected circuitry during worst-case transient events and is guaranteed per Vishay Document Number 88394, page 2.
Is the SMCJ26-E3/9AT suitable for automotive applications?
Yes, the SMCJ26-E3/9AT is AEC-Q101 qualified and rated for operation from -55 °C to +150 °C, making it suitable for under-hood and chassis-mounted automotive applications such as engine control units, body electronics, and infotainment power supplies. Its DO-214AB package supports automated SMT assembly per J-STD-020 MSL Level 1.
What does the "E3/9AT" suffix indicate in SMCJ26-E3/9AT?
The "E3" suffix denotes RoHS compliance and JESD 201 Class 1A whisker resistance; "9AT" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This ordering code ensures traceable, production-ready delivery aligned with IPC-7351B land pattern standards for DO-214AB.
How does the SMCJ26-E3/9AT differ from bi-directional variants like SMCJ26CA?
The SMCJ26-E3/9AT is unidirectional and features a cathode band marking; it conducts only in reverse bias above VBR and blocks forward current. In contrast, SMCJ26CA is bi-directional with no polarity marking and clamps transients of either polarity-making it appropriate for AC lines or differential signal protection where bidirectional symmetry is required.
What thermal derating applies to the SMCJ26-E3/9AT above 25 °C ambient?
The SMCJ26-E3/9AT must be derated linearly above 25 °C ambient per Figure 2 in Vishay Document 88394: peak pulse power decreases by approximately 1.2% per °C rise, reaching ~50% of rated 1500 W at 125 °C ambient. Derating is based on 8.0 mm × 8.0 mm copper pad layout and assumes natural convection cooling.
SMCJ26-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ26-E3/9AT FAQ
1.How can I place an order for SMCJ26-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26-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 SMCJ26-E3/9AT reliable?
The price and inventory of SMCJ26-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 SMCJ26-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ26-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26-E3/9AT?
SMCJ26-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26-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 SMCJ26-E3/9AT?
For technical support, including SMCJ26-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26-E3/9AT requirements.
6.How does Aetrix verify that SMCJ26-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ26-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 SMCJ26-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ26-E3/9AT?
All SMCJ26-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26-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 SMCJ26-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ26-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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