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Vishay General Semiconductor - Diodes Division SMCJ26CAHE3/9AT
- Part No.:
- SMCJ26CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CAHE3/9AT.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,717
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Product details
Overview
SMCJ26CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 26 V standoff voltage (VWM), 42.1 V maximum clamping voltage at 35.6 A peak pulse current (10/1000 μs), and 1500 W peak pulse power dissipation. Used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial systems.
For engineers reviewing the SMCJ26CAHE3/9AT datasheet, SMCJ26CAHE3/9AT pinout, SMCJ26CAHE3/9AT application, or SMCJ26CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low thermal resistance (RθJL = 15 °C/W), and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
The SMCJ26CAHE3/9AT operates as a voltage-clamping device that enters avalanche breakdown symmetrically in both directions when transient voltage exceeds its breakdown range (28.9–31.9 V at 1 mA). Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), enabling effective suppression of fast-rising transients such as ESD and lightning-induced surges.
Thermally, it supports operation from −55 °C to +150 °C with a junction-to-lead thermal resistance of 15 °C/W, allowing efficient heat transfer to PCB copper pads. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101, confirming suitability for automotive under-hood and infotainment applications requiring high reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 28.9 V / 31.9 V at 1 mA - Ensures consistent bidirectional breakdown across production lots |
| VC @ IPPM | 42.1 V at 35.6 A (10/1000 μs) - Limits protected circuit voltage during worst-case surge |
| PPPM | 1500 W - Withstands high-energy transients without failure in standard PCB layout |
| ID @ VWM | 1.0 μA - Ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures |
| RθJL | 15 °C/W - Supports reliable thermal coupling to copper pads without external heatsinking |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H), with matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One terminal of symmetrical avalanche junction; accepts surge current in either direction |
| Cathode | Transient current exit (reverse bias) | Second terminal of symmetrical junction; completes bidirectional conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current under thermal cycling |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast transients, improving protection margin |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| RoHS-compliant & halogen-free option available | Meets global environmental compliance requirements for industrial and automotive OEMs |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 12 V power rails feeding ECUs and lighting modules from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed upstream of DC-DC converters and LDOs. Use Value: Clamps 1500 W surges to ≤42.1 V, preventing damage to downstream regulators rated for 36 V max input. | Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–5 V) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA) bidirectional protector on differential or single-ended signal paths. Use Value: Maintains signal fidelity while suppressing ±1 kV ESD and inductive kickback without loading the sensor output. |
| Telecom Interface Protection | Consumer Device USB/Display Port |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on data line pairs, coordinated with secondary GDT or polymer PTC. Use Value: Fast <1 ns response and 42.1 V clamping prevent latch-up or gate oxide rupture in high-speed interface ICs. | Use Scenario: Overvoltage protection on USB 2.0 D+/D− and DisplayPort AUX channels in laptops and docking stations. IC Role / Device Role / Timing Role: Compact SMC-packaged bidirectional suppressor placed adjacent to connector pins. Use Value: 7.75 mm × 6.22 mm footprint fits tight board space; AEC-Q101 grade supports extended product lifecycle planning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CAHE3/A | Lower PPPM (400 W), smaller SMA (DO-214AC) package, same VWM and VC | Limited to lower-energy transients; not recommended for automotive load-dump | Select only for space-constrained consumer applications where 1500 W rating is unnecessary |
| SMCJ26AHE3/9AT | Unidirectional version; cathode band marking; identical VWM, VC, and PPPM | Requires correct polarity placement; unsuitable for AC-coupled or floating signal lines | Choose only when circuit topology guarantees unidirectional surge polarity and layout allows orientation control |
Compared with SMAJ26CAHE3/A and SMCJ26AHE3/9AT, the SMCJ26CAHE3/9AT uniquely delivers 1500 W bidirectional surge handling in an AEC-Q101-qualified SMC package-enabling single-device protection for demanding automotive and industrial power/signal interfaces without polarity constraints or derating.
Availability
SMCJ26CAHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom surge immunity, and consumer USB/display port hardening requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ26CAHE3/9AT 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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure where robustness and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ26CAHE3/9AT?
The "CA" suffix denotes a bidirectional configuration: the SMCJ26CAHE3/9AT provides symmetrical clamping in both forward and reverse directions, with identical breakdown (28.9–31.9 V) and clamping (42.1 V) characteristics. This eliminates polarity concerns during PCB layout and enables protection of AC-coupled or floating signal lines-unlike unidirectional variants such as SMCJ26AHE3/9AT, which require cathode alignment.
Is SMCJ26CAHE3/9AT qualified for automotive applications?
Yes, SMCJ26CAHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's ordering code "HE3" suffix and documentation (Document Number: 88394, Revision: 09-Jan-2024). This qualification validates its reliability for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces under temperature cycling, humidity, and mechanical stress conditions.
What is the maximum clamping voltage of SMCJ26CAHE3/9AT and under what test condition?
The maximum clamping voltage of SMCJ26CAHE3/9AT is 42.1 V, measured at a peak pulse current (IPPM) of 35.6 A using the standardized 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during a worst-case transient event, ensuring downstream components rated for ≤45 V remain within safe operating limits.
How does the SMC (DO-214AB) package of SMCJ26CAHE3/9AT compare thermally to smaller packages like SMA (DO-214AC)?
The SMC package delivers significantly better thermal performance than SMA: SMCJ26CAHE3/9AT has a junction-to-lead thermal resistance (RθJL) of 15 °C/W, versus ~30–40 °C/W for SMAJ-series devices. This allows higher sustained power dissipation and improved reliability in high-temperature environments such as automotive under-hood locations or industrial motor drives.
Does SMCJ26CAHE3/9AT require special PCB layout considerations for optimal surge handling?
Yes-optimal performance requires mounting SMCJ26CAHE3/9AT on minimum recommended copper pads: 0.31" × 0.31" (8.0 mm × 8.0 mm) per terminal, per Vishay's datasheet (Fig. 2 & note 2). This pad area ensures adequate heat spreading and maintains the specified 1500 W PPPM rating; reduced copper will cause thermal derating and premature failure under repeated surges.
SMCJ26CAHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ26CAHE3/9AT FAQ
1.How can I place an order for SMCJ26CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CAHE3/9AT 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 SMCJ26CAHE3/9AT reliable?
The price and inventory of SMCJ26CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ26CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CAHE3/9AT?
SMCJ26CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CAHE3/9AT 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 SMCJ26CAHE3/9AT?
For technical support, including SMCJ26CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ26CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ26CAHE3/9AT 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 SMCJ26CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ26CAHE3/9AT?
All SMCJ26CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CAHE3/9AT, 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 SMCJ26CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ26CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CAHE3/9AT Tags
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