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Vishay General Semiconductor - Diodes Division SMBJ26CA-E3/5B
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- Part No.:
- SMBJ26CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CA-E3/5B.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,300
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Product details
Overview
SMBJ26CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown range (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 - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ26CA-E3/5B datasheet, SMBJ26CA-E3/5B pinout, SMBJ26CA-E3/5B application, or SMBJ26CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.62), MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin-plated terminals suitable for automated SMT assembly.
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 ps) and low incremental surge resistance, critical for suppressing ESD, lightning-induced surges, and inductive switching transients.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets JESD201 Class 2 whisker resistance and is UL 497B recognized (QVGQ2, file E136766) for protector classification in both uni- and bidirectional configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse stand-off 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 reliable turn-on during overvoltage events without premature leakage. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamping voltage under 10/1000 µs surge; limits downstream voltage stress to <1.62×VWM. |
| PPPM | 600 W - Peak pulse power handling capacity; supports repetitive 0.01% duty cycle surges in harsh environments. |
| IPPM | 14.3 A - Peak pulse current capability with 10/1000 µs waveform; validated on 5.0 mm × 5.0 mm copper pads per terminal. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in high-ambient industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Low-profile surface-mount outline (5.21 mm × 4.06 mm × 2.20 mm); compatible with standard reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), molded case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Bidirectional construction means no polarity marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | No functional distinction between terminals; either terminal serves as anode or cathode depending on instantaneous polarity of surge event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation over repeated events. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to downstream 3.3 V/5 V logic interfaces. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and compatibility with standard reflow profiles - no baking required prior to assembly. |
| UL 497B recognition (QVGQ2) | Validates suitability for use in safety-critical telecom and industrial communication ports requiring certified surge protection. |
| AEC-Q101 qualified option available | HE3/HM3 variants support automotive applications; this E3/5B variant is commercial-grade but shares identical die and package reliability. |
Applications
| Industrial Motor Drives | Telecom Line Interface |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing circuits from inductive kickback during IGBT/MOSFET switching in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across DC bus or signal lines to limit transient excursions to ≤42.1 V. Use Value: Prevents false triggering of overvoltage protection circuitry and extends lifetime of isolated gate drivers by limiting VDS stress. |
Use Scenario: Surge suppression on RJ45 Ethernet PHY lines exposed to lightning-induced common-mode transients in outdoor base stations. IC Role / Device Role / Timing Role: Primary front-end TVS on differential pairs, operating symmetrically to clamp ±42.1 V without polarity biasing. Use Value: Maintains signal integrity during 10/1000 µs surges up to 14.3 A while preserving <1 pF junction capacitance at zero bias. |
| Automotive Body Control Module | Consumer Sensor Hub |
|
Use Scenario: Input protection for LIN bus transceivers connected to external harnesses subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamp on LIN data line referenced to battery rail, absorbing negative and positive transients equally. Use Value: Ensures uninterrupted communication during 100 V/50 ms load dump events by clamping to 42.1 V before transceiver damage threshold. |
Use Scenario: ESD protection for I²C/SPI lines linking MEMS accelerometers, gyroscopes, and environmental sensors in smart home hubs. IC Role / Device Role / Timing Role: Localized TVS adjacent to sensor IC pins, providing sub-nanosecond response to ±8 kV HBM ESD events. Use Value: Reduces system-level ESD failure rate without adding series impedance or degrading 400 kHz I²C timing margins. |
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 variant with identical electrical specs and SMB package; same thermal and surge performance. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy. | Choose SMBJ26CA-M3/5B for green manufacturing programs requiring halogen-free bill-of-materials. |
| SAC26CA | Same VWM (26 V) and VC (42.1 V), but in smaller SOD-123FL package (2.7 mm × 1.7 mm); lower PPPM = 400 W. | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or high-current inductive switching. | Select SAC26CA only for space-constrained consumer designs where 400 W surge rating suffices and PCB area is premium. |
Compared with SMBJ26CA-M3/5B, the SMBJ26CA-E3/5B offers identical protection performance with standard RoHS compliance; versus SAC26CA, it delivers 50% higher surge power handling in a larger but thermally superior SMB package - critical for industrial and telecom deployments.
Availability
SMBJ26CA-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, automotive body control modules, and consumer sensor hubs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ26CA-E3/5B 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 SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where robustness and certification compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ26CA-E3/5B at its rated peak pulse current?
The SMBJ26CA-E3/5B has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 14.3 A using the standardized 10/1000 µs waveform. This value is measured under specified test conditions with 5.0 mm × 5.0 mm copper pads per terminal and confirms the device's ability to limit transient overvoltages to a predictable, safe level for downstream components. The SMBJ26CA-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ26CA-E3/5B suitable for bidirectional signal line protection?
Yes, SMBJ26CA-E3/5B is explicitly designed for bidirectional protection, as indicated by the "CA" suffix and confirmed in Vishay's documentation: electrical characteristics apply identically in both directions. It provides symmetrical clamping on AC-coupled or differential lines such as RS-485, CAN, or Ethernet PHY interfaces without requiring external biasing or polarity awareness. The SMBJ26CA-E3/5B achieves this via a back-to-back diode structure within a single SMB package.
Does SMBJ26CA-E3/5B meet automotive qualification standards?
The SMBJ26CA-E3/5B itself is a commercial-grade part (RoHS-compliant, E3 suffix) and is not AEC-Q101 qualified. However, Vishay offers functionally identical automotive variants under ordering codes SMBJ26CAHE3_X (RoHS + AEC-Q101) and SMBJ26CAHM3_X (halogen-free + AEC-Q101). Engineers requiring automotive qualification must specify those HE3/HM3 variants - the SMBJ26CA-E3/5B remains appropriate for industrial and telecom applications where AEC-Q101 is not mandated.
What is the maximum operating temperature for SMBJ26CA-E3/5B?
The SMBJ26CA-E3/5B has a maximum junction temperature (TJ) rating of +150 °C, allowing reliable operation in high-ambient environments such as enclosed industrial controllers or under-hood automotive modules. Its thermal resistance values - RθJA = 100 °C/W (junction-to-ambient) and RθJL = 20 °C/W (junction-to-lead) - enable effective heat dissipation when mounted on recommended PCB copper areas. This TJ max. specification is integral to the SMBJ26CA-E3/5B's design for sustained surge duty cycles.
How does the SMBJ26CA-E3/5B compare to unidirectional SMBJ26A variants?
The SMBJ26CA-E3/5B differs from unidirectional SMBJ26A solely in polarity configuration: SMBJ26CA-E3/5B uses a symmetrical bidirectional structure for AC or differential line protection, while SMBJ26A includes a cathode band and conducts only in reverse bias. Both share identical VWM (26 V), VBR, VC (42.1 V), and PPPM (600 W) ratings. The SMBJ26CA-E3/5B eliminates polarity orientation concerns during placement, making it preferred for balanced interfaces like RS-422 or transformer-coupled Ethernet.
SMBJ26CA-E3/5B 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ26CA-E3/5B FAQ
1.How can I place an order for SMBJ26CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CA-E3/5B 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 SMBJ26CA-E3/5B reliable?
The price and inventory of SMBJ26CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ26CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CA-E3/5B?
SMBJ26CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CA-E3/5B 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 SMBJ26CA-E3/5B?
For technical support, including SMBJ26CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ26CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ26CA-E3/5B 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 SMBJ26CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ26CA-E3/5B?
All SMBJ26CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CA-E3/5B, 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 SMBJ26CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ26CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CA-E3/5B Tags
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Diodes Incorporated
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