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Vishay General Semiconductor - Diodes Division SMBJ26AHE3_B/H
- Part No.:
- SMBJ26AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26AHE3_B/H.pdf
- Description:
- 600W,26V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,301
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Product details
Overview
SMBJ26AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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 a 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ26AHE3_B/H datasheet, SMBJ26AHE3_B/H pinout, SMBJ26AHE3_B/H application, or SMBJ26AHE3_B/H equivalent, this device is selected for its AEC-Q101 qualification, low incremental surge resistance, fast response time (<1 ns), and compatibility with automated SMT assembly on PCBs requiring IEC 61000-4-2/4-4/4-5 level protection.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping protector: under normal conditions it presents high impedance (>1 MΩ at VWM), then rapidly transitions to low-impedance conduction when transients exceed VBR, limiting downstream voltage to ≤42.1 V. Its glass-passivated junction ensures stable leakage performance and reliability across temperature.
The SMBJ26AHE3_B/H is rated for 150 °C maximum junction temperature, has a thermal resistance of 100 °C/W (junction-to-ambient), and meets J-STD-020 MSL Level 1 - enabling reflow soldering at peak 260 °C without preconditioning. Its 1.0 µA max reverse leakage at 26 V supports low-power sensor interface protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - precise breakdown threshold ensuring predictable turn-on during ESD or surge events. |
| VC @ IPPM | 42.1 V at 14.3 A - clamped voltage under 600 W 10/1000 µs surge; determines maximum stress on protected ICs. |
| PPPM | 600 W - peak pulse power handling capability; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| IPPM | 14.3 A - peak pulse current supported at VC; enables protection of 24 V CAN, RS-485, or PLC I/O circuits. |
| TJ max. | 150 °C - maximum junction temperature; allows operation in under-hood automotive or industrial enclosures. |
| Package | SMB (DO-214AA) - standardized 2-pin SMD outline with 5.0 mm × 3.9 mm footprint and 2.2 mm height; compatible with IPC-7351B. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; forms clamping loop with cathode during transient conduction. |
| Cathode | High-side protected node terminal | Connected to line being protected (e.g., 24 V rail or signal input); band marking identifies this pin on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
| 600 W peak pulse power (10/1000 µs) | Supports repeated surge suppression in industrial control cabinets exposed to inductive switching noise. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during fast transients, protecting 30 V-rated MOSFET gates and microcontroller I/Os. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA) over 10-year field life in humid environments. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between input terminal and ground, absorbing 600 W surges within <1 ns. Use Value: Prevents latch-up or gate oxide damage in optocoupler input stages and microcontroller GPIOs during 100 ms coil de-energization events. |
Use Scenario: Safeguarding LIN bus transceivers and power window motor drivers in body electronics modules subjected to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V/24 V supply rails upstream of LDOs and CAN/LIN PHYs. Use Value: Clamps transients to ≤42.1 V, maintaining functional safety integrity per ISO 16750-2 Pulse 5a/b while meeting AEC-Q101 lifetime requirements. |
| Telecom Power Supply Input | Smart Sensor Signal Conditioning |
|
Use Scenario: Front-end surge protection for AC/DC adapter outputs feeding telecom base station backplane power distribution networks. IC Role / Device Role / Timing Role: Primary-level TVS on +24 V or +48 V DC output rails, coordinated with MOVs and fuses. Use Value: Limits let-through energy to <10 mJ during 10/1000 µs surges, preventing secondary failure of downstream DC-DC converters and FETs. |
Use Scenario: Protecting analog front-ends of industrial temperature/pressure sensors connected via long cables in factory automation. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS on sensor excitation lines and differential output pairs (e.g., 4–20 mA or 0–10 V). Use Value: Maintains signal integrity by avoiding DC offset shift from leakage current while suppressing ESD up to ±15 kV contact discharge. |
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_B/H | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No difference in circuit design or layout; selected only when halogen-free compliance is mandated by OEM spec. | Choose SMBJ26AHM3_B/H if RoHS + halogen-free material declaration is required for final product certification. |
| SMCJ26AHE3_A/H | Same VWM/VBR/VC but in larger SMC (DO-214AB) package; 1500 W PPPM, higher IPPM (23.5 A), RθJA = 50 °C/W. | Used where higher surge endurance or improved thermal dissipation is needed - e.g., outdoor power supplies or EV charging interfaces. | Choose SMCJ26AHE3_A/H only if system-level surge testing exceeds 600 W or board layout allows larger footprint. |
Compared with SMBJ26AHE3_B/H, the HM3 variant offers identical protection performance with halogen-free materials, while the SMCJ26AHE3_A/H provides 2.5× higher surge capacity in a larger package - making SMBJ26AHE3_B/H optimal for space-constrained, AEC-Q101-compliant 24 V embedded systems.
Availability
SMBJ26AHE3_B/H is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, telecom power supplies, and smart sensor interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ26AHE3_B/H 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 automotive qualification.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 validation and stable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ26AHE3_B/H under a 10/1000 µs surge?
The SMBJ26AHE3_B/H has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 14.3 A using the standard 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ26AHE3_B/H maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMBJ26AHE3_B/H suitable for automotive applications?
Yes, SMBJ26AHE3_B/H is AEC-Q101 qualified and specifically designed for automotive use, including body control modules, lighting drivers, and infotainment power supplies. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity rating, and validated performance across –55 °C to +150 °C junction temperature. The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified commercial grade, making SMBJ26AHE3_B/H appropriate for under-hood and cabin applications requiring certified reliability.
What does the "_B/H" suffix mean in SMBJ26AHE3_B/H?
The "_B/H" suffix in SMBJ26AHE3_B/H indicates packaging and reel configuration: "B" denotes the revision code (per Vishay's internal revision tracking), and "H" specifies the preferred package code for 7-inch plastic tape-and-reel delivery with 750 units per reel. This matches the ordering information in Vishay document 88392, where "H" corresponds to the 7″ diameter reel format. The SMBJ26AHE3_B/H is not a functional variant - all electrical and thermal specifications remain identical to the base SMBJ26AHE3 part.
How does SMBJ26AHE3_B/H compare to bidirectional TVS diodes like SMBJ26CA?
SMBJ26AHE3_B/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., +24 V rail to ground), offering lower leakage (<1 µA at 26 V) and forward voltage drop characteristics. In contrast, SMBJ26CA is bidirectional, suited for AC or floating signal lines (e.g., RS-485 differential pairs), but exhibits higher leakage and lacks a defined forward conduction path. The SMBJ26AHE3_B/H cannot replace SMBJ26CA in symmetrical surge environments without circuit redesign, and vice versa - selection must align with system polarity architecture and IEC test profile requirements.
What is the thermal resistance of SMBJ26AHE3_B/H, and how does it affect PCB layout?
The SMBJ26AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended copper pads (0.2″ × 0.2″ per terminal). This value assumes standard FR-4 PCB with no internal planes. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, designers must ensure adequate copper area and airflow - or use the device only for transient (not continuous) power conditions. Layout should follow Vishay's DO-214AA pad dimensions to avoid solder joint reliability issues and ensure specified thermal performance.
SMBJ26AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- 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)
SMBJ26AHE3_B/H FAQ
1.How can I place an order for SMBJ26AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26AHE3_B/H 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_B/H reliable?
The price and inventory of SMBJ26AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ26AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26AHE3_B/H?
SMBJ26AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26AHE3_B/H 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_B/H?
For technical support, including SMBJ26AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ26AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ26AHE3_B/H 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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ26AHE3_B/H?
All SMBJ26AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26AHE3_B/H, 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_B/H part is unused and in its original packaging.
Return procedure for SMBJ26AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26AHE3_B/H Tags
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