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Vishay General Semiconductor - Diodes Division SMBJ26AHE3_A/I
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- Part No.:
- SMBJ26AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26AHE3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,851
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Product details
Overview
SMBJ26AHE3_A/I from Vishay General Semiconductor is a unidirectional 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 at 1 mA, 42.1 V maximum clamping voltage 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 motor drives and automotive ECUs.
For engineers reviewing the SMBJ26AHE3_A/I datasheet, SMBJ26AHE3_A/I pinout, SMBJ26AHE3_A/I application, or SMBJ26AHE3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), clamping performance under surge conditions, and direct alternatives for ESD/lightning transient suppression in 24 V systems.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only when reverse voltage exceeds its specified VBR range (28.9–31.9 V). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of inductive switching transients and ESD events per IEC 61000-4-2/4-4.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it meets MSL Level 1 per J-STD-020, supports reflow up to 260 °C peak, and is qualified to AEC-Q101 - confirming suitability for automotive under-hood environments with operating junction temperature up to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR @ IT = 1 mA | 28.9–31.9 V - Verified breakdown threshold ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM = 14.3 A | 42.1 V - Clamped voltage seen by protected circuit during 600 W 10/1000 µs surge; limits stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability under standardized surge waveform; enables protection against IEC 61000-4-5 Level 3/4 surges. |
| IPPM | 14.3 A - Peak surge current supported at rated clamping voltage; correlates directly with system-level surge immunity requirements. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs derating above 25 °C ambient. |
| TJmax | +150 °C - Maximum junction temperature; supports operation in high-temperature automotive and industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction path during transient clamp event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail or signal); reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics requiring long-term reliability under thermal cycling and vibration. |
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and transportation equipment. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to 3.3 V/5 V logic interfaces downstream. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| Glass passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter stability across temperature and humidity stress. |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤42.1 V, preventing overvoltage shutdown or damage to 40 V-rated buck controllers. |
Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point, ahead of optocoupler or Schmitt trigger input. Use Value: Clamps 1 kV/500 A surge (per IEC 61000-4-5) to safe levels within <1 ns, preserving signal integrity and input stage reliability. |
| Telecom Power Interface | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding PoE-powered Ethernet switch ports against lightning-induced common-mode surges on 48 V bias lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC bias feed, coordinated with common-mode chokes and secondary TVS arrays. Use Value: Absorbs 600 W surge energy while maintaining <1 µA leakage at 48 V standby, minimizing standby power loss. |
Use Scenario: Protecting high-side gate drivers in BLDC inverters from Miller-induced voltage spikes during MOSFET switching. IC Role / Device Role / Timing Role: Local clamp across gate-source terminals of SiC MOSFET drivers to suppress dv/dt-induced false turn-on. Use Value: Fast response (<1 ns) and low VC prevent unintended gate drive excursions that could cause shoot-through failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26AHM3_A/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU automotive Tier 1 programs). | Direct substitution when halogen-free bill-of-materials is required; same footprint, thermal, and electrical behavior. |
| SMAJ26AHE3/A | Same VWM, VBR, and VC, but lower PPPM (400 W) and higher RθJA (140 °C/W) due to smaller SMA (DO-214AC) package. | Not suitable for 600 W surge requirements; limited to lower-energy transients or space-constrained designs where 400 W suffices. | Select only if board area is critical and surge threat level is ≤400 W; verify thermal derating margins due to higher thermal resistance. |
Compared with SMBJ26AHE3_A/I, the HM3 variant offers identical protection performance with halogen-free construction, while the SMAJ26AHE3/A trades 33 % lower surge capacity and reduced thermal efficiency for smaller PCB footprint - making SMBJ26AHE3_A/I optimal for demanding 24 V industrial and automotive applications requiring full 600 W rating and AEC-Q101 assurance.
Availability
SMBJ26AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and telecom power interfaces requiring stable component supply, AEC-Q101 validation, and consistent 600 W transient suppression performance.
Supply support for SMBJ26AHE3_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, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting 24 V and 48 V systems in automotive, industrial automation, and communications infrastructure where robustness and repeatable clamping are critical.
FAQ
What is the clamping voltage of SMBJ26AHE3_A/I at its rated peak pulse current?
The SMBJ26AHE3_A/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 double-exponential surge waveform. This value ensures protected circuits experience no more than 42.1 V during worst-case transient events, making SMBJ26AHE3_A/I suitable for safeguarding 36 V-tolerant components in 24 V systems.
Is SMBJ26AHE3_A/I qualified for automotive applications?
Yes, SMBJ26AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88392. This qualification validates its reliability under automotive temperature cycling, mechanical shock, and humidity testing - enabling use in engine control units, body control modules, and ADAS power supplies where long-term field operation is mandatory.
What is the standoff voltage rating of SMBJ26AHE3_A/I, and how does it relate to 24 V systems?
The standoff voltage (VWM) of SMBJ26AHE3_A/I is 26 V, providing a 2 V margin above nominal 24 V supply rails. This ensures the device remains non-conductive during normal operation - including startup surges and ripple - while reliably triggering only during overvoltage transients exceeding ~29 V, making SMBJ26AHE3_A/I a precise and stable choice for 24 V industrial and automotive power protection.
Does SMBJ26AHE3_A/I have a bidirectional variant, and how does it differ?
No - SMBJ26AHE3_A/I is strictly unidirectional, indicated by the "A" suffix. Bidirectional variants use the "CA" suffix (e.g., SMBJ26CAHE3_A/I) and exhibit symmetrical clamping in both polarities. The unidirectional SMBJ26AHE3_A/I offers lower leakage and tighter VBR tolerance for DC-biased applications like power rail protection, whereas bidirectional versions are used for AC signal line or data bus protection where polarity reversal occurs.
What package type does SMBJ26AHE3_A/I use, and what are its mounting requirements?
SMBJ26AHE3_A/I uses the SMB (DO-214AA) surface-mount package, with dimensions of 4.57 mm × 3.94 mm × 2.20 mm and cathode band marking. It requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation and thermal performance. The device is MSL Level 1 and compatible with standard lead-free reflow profiles peaking at 260 °C, with no pre-bake needed.
SMBJ26AHE3_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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ26AHE3_A/I FAQ
1.How can I place an order for SMBJ26AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26AHE3_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 SMBJ26AHE3_A/I reliable?
The price and inventory of SMBJ26AHE3_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 SMBJ26AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ26AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26AHE3_A/I?
SMBJ26AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26AHE3_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 SMBJ26AHE3_A/I?
For technical support, including SMBJ26AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26AHE3_A/I requirements.
6.How does Aetrix verify that SMBJ26AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ26AHE3_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 SMBJ26AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ26AHE3_A/I?
All SMBJ26AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26AHE3_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 SMBJ26AHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ26AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26AHE3_A/I Tags
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