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Vishay General Semiconductor - Diodes Division SMB8J26CAHE3/52
- Part No.:
- SMB8J26CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CAHE3/52.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,061
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Product details
Overview
SMB8J26CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 26 V stand-off voltage (VWM), 42.1 V maximum clamping voltage (VC) at 19.0 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J26CAHE3/52 datasheet, SMB8J26CAHE3/52 pinout, SMB8J26CAHE3/52 application, or SMB8J26CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low leakage (<1.0 µA at VWM), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Rated for -55 °C to +150 °C operation and qualified to AEC-Q101, SMB8J26CAHE3/52 supports automotive-grade reliability under repetitive surge stress, with derating applied above 25 °C ambient per Fig. 2 and validated clamping performance up to 19.0 A IPPM at TJ = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping initiates |
| VC @ IPPM | 42.1 V - Clamped voltage seen by protected circuit during 19.0 A 10/1000 µs surge |
| PPPM | 800 W - Peak transient energy absorption capacity under standardized waveform |
| ID @ VWM | <1.0 µA - Minimal leakage current preserving signal integrity in high-impedance circuits |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and thermally constrained PCBs |
| MSL Level | Level 1 (260 °C peak) - Supports lead-free reflow without moisture-related failure |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals - either terminal may connect to line or ground in AC/differential protection |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable breakdown characteristics and long-term reliability under repeated surge events |
| Low-profile SMB package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment |
| UL 94 V-0 molding compound | Meets flammability safety requirements for industrial and automotive end-equipment |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control, ADAS sensors, and body electronics |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., temperature, pressure) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector or IC input pins. Use Value: Limits transient-induced voltage to ≤42.1 V, preventing damage to downstream ASICs rated for 3.3 V or 5 V logic rails. | Use Scenario: Safeguarding PLC digital input modules against inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC field wiring before optocoupler or MCU input stage. Use Value: Absorbs 800 W surges without degradation, maintaining <1.0 µA leakage to avoid false triggering in high-impedance sensing circuits. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage protection device mounted at board edge, upstream of common-mode chokes and data-line TVS arrays. Use Value: Responds in <1 ns to clamp common-mode transients while preserving signal integrity up to 100 Mbps. | Use Scenario: Input-stage surge suppression on AC-DC adapter secondary side (5–24 V rails) exposed to mains-borne transients. IC Role / Device Role / Timing Role: Standoff-rated clamping diode across output capacitor to prevent overvoltage during fault conditions. Use Value: Withstands 1000× 8/20 µs surges per IEC 61000-4-5, enabling compliance with UL 62368-1 without additional MOV staging. |
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-E3/52 | Same SMB package and electrical specs (VWM = 26 V, VC = 42.1 V), but commercial-grade (not AEC-Q101 qualified) | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated | Select when cost sensitivity outweighs automotive reliability requirements |
| SMCJ26CAHE3/52 | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VC ratings | Requires larger PCB footprint and higher thermal mass; used where surge energy exceeds 800 W | Choose when system-level surge testing requires >800 W margin or legacy layout accommodates SMC |
Compared with SMBJ26CA-E3/52 and SMCJ26CAHE3/52, SMB8J26CAHE3/52 uniquely balances AEC-Q101 compliance, 800 W surge rating, and SMB footprint - making it optimal for space-constrained automotive modules needing certified reliability without SMC-level board area.
Availability
SMB8J26CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface designs requiring stable component supply, AEC-Q101 traceability, and consistent surge performance across production lots.
Supply support for SMB8J26CAHE3/52 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 SMB8JxxCA family targets high-reliability transient suppression in harsh environments, with design focus on automotive-grade surge immunity, low-leakage stability, and compatibility with automated manufacturing processes.
FAQ
What is the clamping voltage of SMB8J26CAHE3/52 at its rated peak pulse current?
The SMB8J26CAHE3/52 has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current (IPPM) of 19.0 A under the 10/1000 µs waveform condition. This value is measured at TJ = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB8J26CAHE3/52 maintains this clamping performance across its qualified operating temperature range.
Is SMB8J26CAHE3/52 suitable for automotive applications?
Yes, SMB8J26CAHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It meets stress test requirements including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). The SMB8J26CAHE3/52 is deployed in engine control units, ADAS sensor interfaces, and body electronics where transient immunity and long-term reliability are mandatory.
What is the standoff voltage and leakage current specification for SMB8J26CAHE3/52?
The SMB8J26CAHE3/52 has a standoff voltage (VWM) of 26 V and a maximum reverse leakage current (ID) of 1.0 µA at that voltage, measured at TA = 25 °C. This low leakage ensures minimal loading on high-impedance signal paths such as sensor outputs or communication lines. The SMB8J26CAHE3/52 maintains this leakage performance across its full operating temperature range (-55 °C to +150 °C).
Does SMB8J26CAHE3/52 have polarity markings, and how is it mounted?
No, SMB8J26CAHE3/52 is a bidirectional TVS diode and carries no polarity marking - both terminals are functionally identical. It is mounted in SMB (DO-214AA) package using standard SMT reflow, with recommended pad layout of 0.2" x 0.2" (5.0 mm x 5.0 mm) copper areas per terminal. The SMB8J26CAHE3/52 is MSL Level 1 compliant, supporting peak reflow temperatures up to 260 °C.
How does SMB8J26CAHE3/52 compare to unidirectional variants like SMB10J26AHE3/52?
The SMB8J26CAHE3/52 is bidirectional with 800 W PPPM and 42.1 V VC, whereas SMB10J26AHE3/52 is unidirectional with 1000 W PPPM and same VC. The "8" prefix denotes lower peak power rating optimized for bidirectional symmetry; the "10" prefix indicates higher-power unidirectional capability. SMB8J26CAHE3/52 is selected for AC, differential, or polarity-agnostic protection; SMB10J26AHE3/52 suits DC rail clamping where higher surge margin is needed.
SMB8J26CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 19A
- Power - Peak Pulse:
- 800W
- 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-214AA (SMB)
SMB8J26CAHE3/52 FAQ
1.How can I place an order for SMB8J26CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CAHE3/52 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 SMB8J26CAHE3/52 reliable?
The price and inventory of SMB8J26CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J26CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J26CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CAHE3/52?
SMB8J26CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CAHE3/52 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 SMB8J26CAHE3/52?
For technical support, including SMB8J26CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J26CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J26CAHE3/52 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 SMB8J26CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J26CAHE3/52?
All SMB8J26CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CAHE3/52, 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 SMB8J26CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J26CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CAHE3/52 Tags
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