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Vishay General Semiconductor - Diodes Division SMBJ26CAHE3_A/I
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- Part No.:
- SMBJ26CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CAHE3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,315
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Product details
Overview
SMBJ26CAHE3_A/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 range (VBR at 1 mA), 42.1 V clamping voltage (VC) at 14.3 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), deployed on signal lines and power rails in industrial sensor interfaces.
For engineers reviewing the SMBJ26CAHE3_A/I datasheet, SMBJ26CAHE3_A/I pinout, SMBJ26CAHE3_A/I application, or SMBJ26CAHE3_A/I equivalent, this device is selected for bidirectional surge suppression where low clamping ratio, AEC-Q101 qualification, and MSL Level 1 reflow compatibility are required - especially in automotive-grade sensor units and telecom interface protection.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling protection against positive and negative transients without polarity dependency. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports tight clamping performance under repetitive 10/1000 µs surges at 0.01% duty cycle.
The device is rated for TJ = –55 °C to +150 °C operation, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, and meets J-STD-020 MSL Level 1 (peak reflow 260 °C). The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification - critical for automotive front-end electronics and industrial control modules requiring long-term reliability validation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - guaranteed conduction onset range; ensures predictable turn-on during transient events |
| VC (Clamping Voltage) | 42.1 V at IPPM = 14.3 A - peak voltage seen by protected circuit during 600 W surge; determines stress on downstream ICs |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - standardized surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 tests |
| ID (Reverse Leakage) | ≤1.0 µA at 26 V - minimal standby power loss and signal integrity impact on high-impedance lines like sensor outputs |
| TJ max. | +150 °C - enables deployment in under-hood automotive environments and thermally constrained industrial enclosures |
| Package | SMB (DO-214AA) - 0.220" × 0.155" footprint with matte tin leads; compatible with automated SMT placement and J-STD-002 soldering |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically regardless of orientation in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as interchangeable surge current entry/exit points; no polarity sensitivity enables simplified layout and reduced BOM variants |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment interfaces per stress test requirements |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges per IEC 61000-4-5 without degradation; supports >100,000 surge cycles at rated conditions |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot across protected ICs - critical for 3.3 V and 5 V logic interfacing with analog sensors |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement; supports standard lead-free reflow profiles without moisture-related delamination risk |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime; reduces parameter drift in harsh thermal cycling environments |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, shunting transients before they reach MCU ADC inputs or transceivers. Use Value: Clamps 42.1 V at 14.3 A, limiting stress on 5 V-tolerant automotive microcontrollers and preserving signal fidelity during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs using RS-485 transceivers subject to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Common-mode transient suppressor mounted across A/B lines and ground, absorbing ±15 kV contact ESD (IEC 61000-4-2) and 4 kV EFT bursts. Use Value: Symmetric clamping ensures equal protection on both polarities; low leakage (<1 µA) prevents DC bias shift on high-impedance termination networks. |
| Telecom Line Card Protection | Consumer IoT Power Input |
Use Scenario: Front-end surge protection on Ethernet PHY power rails and auxiliary control lines in telecom base station line cards. IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT) primary protection, providing fast-response clamping for residual transients. Use Value: 10 ns response time and 600 W rating enable coordination with upstream GDTs; SMB package allows dense placement near connectors. |
Use Scenario: Input-stage overvoltage suppression on USB-C PD and 12 V wall adapter inputs in smart home hubs and voice assistants. IC Role / Device Role / Timing Role: Standoff-rated clamp on VBUS line, triggered only during fault conditions (e.g., adapter miswiring, hot-plug spikes). Use Value: 26 V VWM avoids false triggering during normal 9–15 V input operation; RoHS + AEC-Q101 ensures compliance for global consumer certifications. |
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-M3/5B | Halogen-free, RoHS-compliant, non-AEC-Q101; identical electrical specs and SMB package | Targeted at commercial/industrial designs where automotive qualification is not required | Select when halogen-free compliance is mandatory and AEC-Q101 is unnecessary |
| SMCJ26CAHE3_A/I | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; 1500 W PPPM rating | Used where higher surge energy handling (>600 W) or improved thermal dissipation is needed | Choose for applications demanding >1000 W surge capability or extended thermal margin in high-power systems |
Compared with SMBJ26CAHE3_A/I, the SMBJ26CA-M3/5B offers identical protection performance without automotive qualification, while the SMCJ26CAHE3_A/I provides 2.5× higher pulse power in a larger footprint - enabling trade-offs between board space, surge margin, and qualification scope.
Availability
SMBJ26CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line card protection requiring stable component supply, AEC-Q101 traceability, and MSL Level 1 reflow compatibility.
Supply support for SMBJ26CAHE3_A/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 is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance, AEC-Q101 validation, and robust thermal behavior in compact surface-mount packages.
FAQ
What does the "CA" suffix indicate in SMBJ26CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ26CAHE3_A/I conducts and clamps transient voltages equally in both polarities. This eliminates polarity concerns during PCB layout and makes it ideal for protecting AC-coupled or differential signal lines such as RS-485, CAN, or Ethernet PHYs where voltage spikes may occur in either direction.
Is SMBJ26CAHE3_A/I suitable for automotive applications?
Yes, SMBJ26CAHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. It is designed for automotive use cases including engine control modules, ADAS sensor interfaces, and infotainment systems where validated reliability under thermal cycling, vibration, and surge stress is mandatory.
What is the clamping voltage of SMBJ26CAHE3_A/I and why does it matter?
The clamping voltage (VC) of SMBJ26CAHE3_A/I is 42.1 V at 14.3 A peak pulse current. This value represents the maximum voltage imposed on the protected circuit during a transient event - directly determining whether downstream components like MCUs, transceivers, or analog sensors remain within their absolute maximum ratings during surge conditions.
How does SMBJ26CAHE3_A/I differ from unidirectional SMBJ26AHE3_A/I?
SMBJ26CAHE3_A/I is bidirectional with symmetrical conduction, while SMBJ26AHE3_A/I is unidirectional and conducts only from anode to cathode. The unidirectional version has a polarity band and is used on DC power rails or single-ended signals; the CA variant replaces two unidirectional devices in differential or AC paths, reducing component count and layout complexity.
What is the thermal resistance and maximum junction temperature of SMBJ26CAHE3_A/I?
SMBJ26CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and a maximum junction temperature (TJ max.) of +150 °C. These values define its safe operating envelope: at 5.0 W steady-state power dissipation, junction temperature rise is ~500 °C above ambient - confirming that SMBJ26CAHE3_A/I is intended for transient-only operation, not continuous power dissipation.
SMBJ26CAHE3_A/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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ26CAHE3_A/I FAQ
1.How can I place an order for SMBJ26CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CAHE3_A/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_A/I reliable?
The price and inventory of SMBJ26CAHE3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ26CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CAHE3_A/I?
SMBJ26CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CAHE3_A/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_A/I?
For technical support, including SMBJ26CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ26CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ26CAHE3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ26CAHE3_A/I?
All SMBJ26CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CAHE3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMBJ26CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CAHE3_A/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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