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Vishay General Semiconductor - Diodes Division SMBJ26A-E3/52
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- Part No.:
- SMBJ26A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26A-E3/52.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:28,538
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Product details
Overview
SMBJ26A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 26 V stand-off 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.
For engineers reviewing the SMBJ26A-E3/52 datasheet, SMBJ26A-E3/52 pinout, SMBJ26A-E3/52 application, or SMBJ26A-E3/52 equivalent, key selection considerations include its unidirectional polarity, 1.0 µA max reverse leakage at VWM, 150 °C max junction temperature, RoHS-compliant matte tin-plated leads, and suitability for automotive-grade designs when ordered with HE3 suffix.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below VWM = 26 V and rapidly transitions to low-impedance conduction above VBR (min 28.9 V) to limit transient overvoltages. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ps).
The device delivers 600 W peak pulse power handling under standardized 10/1000 µs waveform conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation on standard 0.2" × 0.2" copper pads without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before significant leakage; defines system's normal operating margin. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage seen by protected circuit during 600 W surge; determines downstream component stress. |
| IPPM | 14.3 A - Peak surge current capability with 10/1000 µs waveform; validates protection level for common industrial transients. |
| PPPM | 600 W - Standardized transient energy absorption capacity; enables use in IEC 61000-4-5 Level 3/4 surge environments. |
| ID @ VWM | 1.0 µA max - Ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max | +150 °C - Enables deployment in under-hood automotive, industrial motor drives, and enclosed power supplies. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or lower-potential rail in unidirectional protection configurations. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., power rail or signal trace); clamps to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates robustness against IEC 61000-4-5 surge events up to 4 kV open-circuit / 2 kV source impedance. |
| Glass passivated chip junction | Ensures stable, repeatable avalanche behavior across temperature and lifetime; eliminates parameter drift in harsh environments. |
| MSL Level 1 (J-STD-020), 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination risks. |
| RoHS-compliant, halogen-free option available (M3 suffix) | Meets global environmental compliance requirements including EU RoHS Directive 2011/65/EU and JEDEC J-STD-20. |
| AEC-Q101 qualified variant (HE3/HM3) | Enables direct use in automotive powertrain, body control, and ADAS modules requiring validated reliability. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in vehicle ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role: Unidirectional clamping TVS placed between battery rail and DC-DC input stage. Use Value: Limits transient voltage to ≤42.1 V, preventing damage to downstream regulators and microcontrollers rated for 36 V absolute max. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation systems from ESD and cable discharge events. IC Role / Device Role: Low-capacitance TVS mounted directly at connector interface to shunt transients before reaching ADC front-end. Use Value: 1.0 µA leakage preserves signal accuracy in µA-level sensor current loops; fast response prevents latch-up in precision amplifiers. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
|
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras, access points) from surges entering via 48 V DC input lines. IC Role / Device Role: Primary TVS on main DC input, coordinated with upstream fuse and secondary filtering. Use Value: 600 W rating handles repetitive surges per ITU-T K.20/K.21; 150 °C TJ supports sealed outdoor enclosures. |
Use Scenario: Adding transient immunity to USB 2.0 data lines and VBUS in portable speakers, docking stations, and smart home hubs. IC Role / Device Role: Unidirectional TVS on VBUS line only (not data lines), sized for 26 V nominal 5 V supply with headroom. Use Value: SMB package footprint allows placement adjacent to USB connector; RoHS/E3 compliance meets consumer product regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA-E3/52 | Bidirectional version; symmetric VBR (28.9–31.9 V) in both polarities; same VC and PPPM. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) where reverse transients occur. | Select SMBJ26CA-E3/52 only if bidirectional clamping is needed; otherwise SMBJ26A-E3/52 offers lower leakage in DC-only paths. |
| SMCJ26A-E3/52 | Larger SMC (DO-214AB) package; higher 1500 W PPPM; identical VWM, VBR, and VC specs. | Used where higher surge energy handling is required (e.g., mains-connected equipment), but occupies ~2.5× PCB area. | Choose SMBJ26A-E3/52 for space-constrained boards; upgrade to SMCJ26A-E3/52 only if tested surge levels exceed 600 W. |
Compared with SMBJ26CA-E3/52 and SMCJ26A-E3/52, the SMBJ26A-E3/52 provides optimal balance of compact SMB footprint, 600 W surge rating, and ultra-low 1.0 µA leakage-making it ideal for cost- and space-sensitive 24–26 V DC protection where unidirectional transients dominate.
Availability
SMBJ26A-E3/52 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom DC inputs, and consumer USB power protection requiring stable component supply and full traceability.
Supply support for SMBJ26A-E3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered for robust transient suppression in automotive, industrial, and communications infrastructure where consistent clamping and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ26A-E3/52 under surge conditions?
The SMBJ26A-E3/52 has a maximum clamping voltage (VC) of 42.1 V at 14.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per industry-standard test conditions and defines the highest voltage the protected circuit will experience during a 600 W transient event. The SMBJ26A-E3/52 maintains this clamping performance across its specified operating temperature range.
Is SMBJ26A-E3/52 suitable for automotive applications?
The base SMBJ26A-E3/52 is commercial-grade and RoHS-compliant, but not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ26A-HE3 variant (AEC-Q101 qualified, RoHS-compliant) with identical electrical specs. Engineers must specify HE3 or HM3 suffixes for automotive-grade qualification; the SMBJ26A-E3/52 itself is intended for industrial and consumer applications unless explicitly upgraded.
How does the SMBJ26A-E3/52 differ from the SMBJ26CA-E3/52?
The SMBJ26A-E3/52 is unidirectional, with cathode marked by a band and designed to clamp only reverse-polarity transients on DC lines. The SMBJ26CA-E3/52 is bidirectional, offering symmetrical clamping in both directions-required for AC signals or differential buses like RS-485. Both share identical VWM, VBR, VC, and PPPM, but SMBJ26A-E3/52 exhibits lower reverse leakage (1.0 µA vs. 2.0 µA for CA versions at VWM).
What is the thermal resistance of SMBJ26A-E3/52, and how does it affect layout?
The SMBJ26A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. These values assume mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation at 150 °C max junction temperature, PCB layout must provide adequate copper area and avoid excessive ambient heating-especially during repetitive surge events.
Does SMBJ26A-E3/52 meet lead-free soldering requirements?
Yes, the SMBJ26A-E3/52 is RoHS-compliant and rated for lead-free reflow with a maximum peak temperature of 260 °C (MSL Level 1 per J-STD-020). Its matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, and it passes JESD 201 Class 2 whisker testing. No special pre-conditioning or process adjustments are required beyond standard Pb-free SMT profiles.
SMBJ26A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ26A-E3/52 FAQ
1.How can I place an order for SMBJ26A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26A-E3/52 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 SMBJ26A-E3/52 reliable?
The price and inventory of SMBJ26A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ26A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26A-E3/52?
SMBJ26A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26A-E3/52 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 SMBJ26A-E3/52?
For technical support, including SMBJ26A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26A-E3/52 requirements.
6.How does Aetrix verify that SMBJ26A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ26A-E3/52 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 SMBJ26A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ26A-E3/52?
All SMBJ26A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26A-E3/52, 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 SMBJ26A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ26A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26A-E3/52 Tags
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