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Vishay General Semiconductor - Diodes Division SMCJ26AHE3/9AT
- Part No.:
- SMCJ26AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26AHE3/9AT.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,103
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Product details
Overview
SMCJ26AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR at 1 mA), 42.1 V clamping voltage (VC) at 35.6 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the SMCJ26AHE3/9AT datasheet, SMCJ26AHE3/9AT pinout, SMCJ26AHE3/9AT application, or SMCJ26AHE3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, unidirectional polarity with cathode band marking, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
The SMCJ26AHE3/9AT operates as a clamping-type TVS diode, leveraging an avalanche breakdown mechanism to divert transient energy away from protected circuitry once reverse voltage exceeds VBR. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive surge stress.
Designed for unidirectional DC line protection, it exhibits 1.0 μA maximum reverse leakage at 26 V (VWM), 0.097 %/°C temperature coefficient of VBR, and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak tolerance - confirming suitability for high-reliability automotive and industrial assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 42.1 V at 35.6 A (10/1000 μs) - Limits downstream voltage stress during surge; critical for MOSFET/IC survivability. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure. |
| IPPM (Peak Pulse Current) | 35.6 A - Peak surge current capability under standardized 10/1000 μs waveform; validated with 8.0 mm × 8.0 mm copper pads. |
| TJmax | 150 °C - Enables operation in under-hood automotive environments and thermally constrained industrial enclosures. |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
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; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V supply rail); band marking identifies this end. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use - supports design-in for engine control, ADAS, and body electronics. |
| Glass passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; resists moisture-induced degradation. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast transients, improving protection margin for sensitive ICs. |
| MSL Level 1 rating | Enables direct placement into lead-free reflow without baking; compatible with standard SMT production lines. |
| 1500 W peak pulse power | Handles high-energy surges such as load dump (ISO 16750-2) and inductive switching spikes in 24 V systems. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units against load dump transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC-DC input stage. Use Value: Clamps to ≤42.1 V during 1500 W surges, preventing damage to downstream regulators and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Reverse-biased TVS on signal line to ground, suppressing ESD and cable discharge events. Use Value: Sub-1 ns response time limits voltage excursion to <42.1 V, preserving ADC accuracy and interface integrity. |
| Telecom DC Power Input Protection | Motor Drive Control Signal Protection |
|
Use Scenario: Shielding 48 V PoE-powered equipment front-end from lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail upstream of hot-swap controller. Use Value: Withstands repeated 10/1000 μs surges up to 35.6 A while maintaining <1 μA leakage at 26 V standby. |
Use Scenario: Guarding isolated gate driver enable signals in servo motor inverters against cross-talk and switching noise. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on logic-level control line referenced to local ground. Use Value: 0.097 %/°C VBR tempco ensures consistent clamping across -40 °C to +125 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26AHE3/57T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR range | Reduced surge handling; suitable only for lower-energy threats (e.g., ESD-only zones) | Select when board space is constrained and peak surge energy remains below 600 W. |
| SMCJ26CAHE3/9AT | Bidirectional variant; identical VWM, VBR, VC, and PPPM, but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose for RS-485, CAN bus, or transformer-isolated interfaces needing bidirectional protection. |
Compared with SMBJ26AHE3/57T, the SMCJ26AHE3/9AT delivers 2.5× higher surge power handling in the same footprint family; versus SMCJ26CAHE3/9AT, it offers optimized clamping for fixed-polarity DC rails with tighter leakage control and lower cost.
Availability
SMCJ26AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU designs, industrial I/O protection, and telecom power input stages requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SMCJ26AHE3/9AT 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 automotive-grade validation.
The SMCJ series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against ISO 7637-2 and IEC 61000-4-5 threats is mandatory.
FAQ
What is the clamping voltage of the SMCJ26AHE3/9AT at its rated peak pulse current?
The SMCJ26AHE3/9AT has a maximum clamping voltage (VC) of 42.1 V at 35.6 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions using 8.0 mm × 8.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ26AHE3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ26AHE3/9AT qualified for automotive applications?
Yes, the SMCJ26AHE3/9AT carries AEC-Q101 qualification, confirmed in Vishay's official documentation (Document Number: 88394, Revision: 09-Jan-2024). This certification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making the SMCJ26AHE3/9AT suitable for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS power supplies.
What does the "HE3" suffix indicate in SMCJ26AHE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability standards. It distinguishes the automotive-grade version from commercial variants (e.g., "E3") and confirms compliance with whisker resistance Class 2 per JESD 201. The SMCJ26AHE3/9AT is specifically intended for mission-critical automotive and industrial deployments.
How does the SMCJ26AHE3/9AT differ from the bidirectional SMCJ26CAHE3/9AT?
The SMCJ26AHE3/9AT is unidirectional with cathode-band polarity marking, optimized for DC rail protection where voltage polarity is fixed. In contrast, the SMCJ26CAHE3/9AT is bidirectional - offering symmetrical clamping for AC or floating signals - and lacks polarity marking. Both share identical VWM, VBR, VC, and PPPM, but the SMCJ26AHE3/9AT provides lower reverse leakage (1.0 μA vs. 2.0 μA for CA variant at VWM) in DC applications.
What is the thermal resistance of the SMCJ26AHE3/9AT, and how does it affect PCB layout?
The SMCJ26AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. To maintain safe operation at full power dissipation, PCB layout must use minimum 8.0 mm × 8.0 mm copper pads per terminal as specified in Vishay's datasheet. Reducing pad size increases thermal impedance and risks exceeding the 150 °C maximum junction temperature during repetitive surges.
SMCJ26AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ26AHE3/9AT FAQ
1.How can I place an order for SMCJ26AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26AHE3/9AT 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 SMCJ26AHE3/9AT reliable?
The price and inventory of SMCJ26AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ26AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26AHE3/9AT?
SMCJ26AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26AHE3/9AT 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 SMCJ26AHE3/9AT?
For technical support, including SMCJ26AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ26AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ26AHE3/9AT 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 SMCJ26AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ26AHE3/9AT?
All SMCJ26AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26AHE3/9AT, 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 SMCJ26AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ26AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26AHE3/9AT Tags
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