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Vishay General Semiconductor - Diodes Division SMBJ26CAHE3_B/I
- Part No.:
- SMBJ26CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CAHE3_B/I.pdf
- Description:
- 600W,26V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,576
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Product details
Overview
SMBJ26CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 42.1 V maximum clamping voltage (VC) at 14.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial sensor interfaces.
For engineers reviewing the SMBJ26CAHE3_B/I datasheet, SMBJ26CAHE3_B/I pinout, SMBJ26CAHE3_B/I application, or SMBJ26CAHE3_B/I equivalent, key selection considerations include bidirectional surge immunity, AEC-Q101 qualification status, clamping performance under 14.3 A transient, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions per ANSI/IEEE C62.35 standards. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping behavior during repetitive transients up to 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability requirements - confirming suitability for high-reliability automotive and industrial PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Verified breakdown range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamping voltage limits downstream IC stress during 10/1000 µs surge events. |
| PPPM | 600 W - Peak pulse power handling capability with standardized 10/1000 µs waveform. |
| IPPM | 14.3 A - Maximum non-repetitive surge current supported without degradation. |
| TJ max. | +150 °C - Enables operation in under-hood automotive or high-ambient industrial environments. |
| RθJA | 100 °C/W - Thermal resistance informs derating requirements when mounted on standard 0.2" × 0.2" copper pads. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Surge current path | Both terminals conduct identically during positive or negative transients; no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| 600 W peak pulse power | Withstands high-energy transients induced by inductive load switching or lightning surges in industrial control systems. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard lead-free reflow profiles peaking at 260 °C. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current under thermal and humidity stress. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) and digital I/O (CAN, LIN) from ESD and load dump in factory automation sensors. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to shunt transients before reaching precision ADCs or microcontrollers. Use Value: Clamps 14.3 A surges to ≤42.1 V, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 12 V supply inputs in BCM modules exposed to ISO 7637-2 Pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail upstream of DC/DC converters and LDOs. Use Value: Withstands 600 W pulses while maintaining <1 µA leakage at 26 V, minimizing quiescent current impact. |
| Telecom Equipment Surge Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Shielding Ethernet PHY power and data lines against induced surges from nearby AC wiring or lightning coupling. IC Role / Device Role / Timing Role: Secondary-level protection after gas discharge tube (GDT) front-end, absorbing residual energy. Use Value: Fast <1 ns response captures high-frequency components missed by slower primary protectors. |
Use Scenario: Guarding microcontroller GPIOs and gate drivers connected to brushed DC motor commutation circuits. IC Role / Device Role / Timing Role: Localized clamping at motor driver IC inputs to suppress back-EMF spikes during PWM switching. Use Value: 42.1 V clamping prevents exceedance of absolute maximum ratings on 5 V tolerant I/O pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CAHM3_B/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free materials are mandated in final product compliance. | Choose SMBJ26CAHM3_B/I when environmental compliance requires halogen-free packaging. |
| SMAJ26CAHE3_A/H | Lower 400 W PPPM, SMA (DO-214AC) package, same VWM/VC but reduced surge current (IPPM = 11.4 A). | Less robust for high-energy transients; suitable only where space constraints preclude SMB footprint. | Select SMAJ26CAHE3_A/H only if PCB layout prohibits SMB package and surge energy is confirmed ≤400 W. |
Compared with SMBJ26CAHE3_B/I, the HM3 variant offers identical protection performance with halogen-free construction, while the SMAJ26CAHE3_A/H trades 33% lower pulse power for smaller footprint - requiring careful validation against system-level surge test requirements.
Availability
SMBJ26CAHE3_B/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom equipment requiring stable component supply with AEC-Q101 qualification and full traceability.
Supply support for SMBJ26CAHE3_B/I 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 SMBJ series targets high-energy transient suppression in harsh environments, engineered for automotive, industrial, and telecom applications where robustness, consistency, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ26CAHE3_B/I at its rated peak pulse current?
The SMBJ26CAHE3_B/I has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 14.3 A, measured using the standardized 10/1000 µs waveform. This value ensures protected circuitry remains within safe voltage limits during surge events, and is verified per ANSI/IEEE C62.35 test conditions. The SMBJ26CAHE3_B/I maintains this clamping performance across its full operating temperature range.
Is SMBJ26CAHE3_B/I qualified for automotive applications?
Yes, SMBJ26CAHE3_B/I is AEC-Q101 qualified, meaning it has passed stress tests including high-temperature reverse bias, temperature cycling, and ESD per the automotive semiconductor reliability standard. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction. This makes SMBJ26CAHE3_B/I suitable for use in automotive body electronics, infotainment power supplies, and sensor modules where qualification is mandatory.
How does the bidirectional configuration of SMBJ26CAHE3_B/I affect its circuit implementation?
The bidirectional configuration of SMBJ26CAHE3_B/I allows symmetric protection of AC-coupled or floating signal lines without regard to polarity - eliminating need for orientation verification during placement. Unlike unidirectional TVS diodes, SMBJ26CAHE3_B/I conducts equally during positive and negative transients, making it ideal for data lines (e.g., RS-485, CAN), transformer-coupled interfaces, and dual-rail power domains. No cathode marking is present on the SMB package.
What is the thermal resistance of SMBJ26CAHE3_B/I, and how does it impact PCB layout?
The SMBJ26CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 board material and natural convection cooling. To maintain safe junction temperatures under sustained power dissipation, designers must ensure adequate copper area and avoid excessive ambient temperature rise - especially important in enclosed industrial enclosures.
Does SMBJ26CAHE3_B/I meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMBJ26CAHE3_B/I meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means the device can be placed directly onto PCBs without pre-baking and is fully compatible with standard lead-free reflow profiles. The qualification covers both moisture absorption resistance and thermal robustness during soldering - critical for high-yield automated SMT assembly in automotive and industrial manufacturing.
SMBJ26CAHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 14.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ26CAHE3_B/I FAQ
1.How can I place an order for SMBJ26CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CAHE3_B/I 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 SMBJ26CAHE3_B/I reliable?
The price and inventory of SMBJ26CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ26CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CAHE3_B/I?
SMBJ26CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CAHE3_B/I 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 SMBJ26CAHE3_B/I?
For technical support, including SMBJ26CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ26CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ26CAHE3_B/I 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 SMBJ26CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ26CAHE3_B/I?
All SMBJ26CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CAHE3_B/I, 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 SMBJ26CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ26CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CAHE3_B/I Tags
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