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Vishay General Semiconductor - Diodes Division SMBJ26AHE3_B/I
- Part No.:
- SMBJ26AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26AHE3_B/I.pdf
- Description:
- 600W,26V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,723
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Product details
Overview
SMBJ26AHE3_B/I 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 DC power rails and signal lines. 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 in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the SMBJ26AHE3_B/I datasheet, SMBJ26AHE3_B/I pinout, SMBJ26AHE3_B/I application, or SMBJ26AHE3_B/I equivalent, key selection criteria include its AEC-Q101 qualification, low 1.0 µA reverse leakage at VWM, fast sub-nanosecond response time, and compatibility with automated SMT placement on standard PCB pad layouts per JEDEC DO-214AA footprint.
Technical Context
This TVS diode operates as a unidirectional clamping device: under normal conditions it presents high impedance above 26 V reverse bias, then rapidly transitions to low-impedance conduction when transients exceed its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance (Rdyn ≈ 2.9 Ω, derived from ΔVC/ΔIPPM).
Thermally, it supports operation from –55 °C to +150 °C junction temperature, with RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, enabling reliable surge handling in compact, thermally constrained designs without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 24 V systems. |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - Tight tolerance ensures predictable turn-on during ESD or load-dump events. |
| VC (Clamping Voltage) | 42.1 V at 14.3 A (10/1000 µs) - Limits downstream IC stress to safe levels during 600 W transient surges. |
| IPPM (Peak Pulse Current) | 14.3 A - Sustains single-pulse energy up to 600 W without degradation; validated per IEC 61000-4-5 Level 4. |
| ID (Reverse Leakage) | 1.0 µA max at 26 V - Minimizes standby power loss and avoids false triggering in low-current sensor interfaces. |
| TJmax | +150 °C - Enables use in under-hood automotive environments and sealed industrial enclosures. |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability including HTOL, TCT, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band; anode and cathode terminals align with standard DO-214AA mechanical outline (0.205" × 0.130" body, 0.086" lead span).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., 24 V rail); conducts surge current to ground during overvoltage events. |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping loop with minimal inductance for effective transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Withstands automotive load-dump pulses (ISO 7637-2 Pulse 5a) and industrial switching surges without failure. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics per stress test requirements - suitable for engine control, ADAS, and body modules. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage across temperature and lifetime; eliminates risk of junction corrosion. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning or special handling. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during fast transients - critical for protecting 3.3 V/5 V logic and MOSFET gate drivers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against ISO 7637-2 load-dump transients up to 65 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly at connector entry point to shunt surge energy to chassis ground. Use Value: Clamps peak voltage to ≤42.1 V within nanoseconds, preventing damage to downstream DC/DC converters and microcontrollers rated for 40 V absolute max. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in programmable logic controllers (PLCs) from field-wiring induced surges. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS mounted adjacent to terminal block to suppress fast transients before reaching precision DACs or op-amps. Use Value: Maintains signal integrity with <1 µA standby leakage while clamping 1 kV EFT bursts to <45 V - preserving 16-bit measurement accuracy. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Securing 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage, coordinated with upstream GDT and downstream π-filter for multi-stage protection. Use Value: 600 W rating handles IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) surges up to 4 kV without derating. |
Use Scenario: Shielding H-bridge gate drivers in smart appliance motor controllers from inductive kickback during brushless DC motor commutation. IC Role / Device Role / Timing Role: Localized TVS across VDD and ground near half-bridge ICs to clamp voltage spikes generated by MOSFET switching. Use Value: Sub-ns response time limits VDS overshoot to <45 V, preventing unintended avalanche conduction and gate oxide stress in 60 V-rated MOSFETs. |
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/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy (e.g., EU automotive Tier 1s). | Direct material substitution when halogen-free content is required; no design or layout changes needed. |
| SMCJ26AHE3_A/I | Larger SMC (DO-214AB) package with higher 1500 W peak power rating; same VWM, VBR, and VC but 28.6 A IPPM. | Used where higher surge endurance is needed (e.g., main AC/DC input stages), but requires larger PCB footprint and different thermal pad layout. | Select when system-level surge testing exceeds 600 W; otherwise SMBJ26AHE3_B/I offers optimal size-to-power ratio for board-edge protection. |
Compared with SMBJ26AHM3_B/I, SMBJ26AHE3_B/I provides identical protection performance with standard RoHS compliance; compared with SMCJ26AHE3_A/I, it delivers 600 W clamping in a 30% smaller footprint - ideal for space-constrained automotive and industrial PCBs where 600 W meets IEC/ISO test requirements.
Availability
SMBJ26AHE3_B/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, and telecom power supply inputs requiring stable component supply, AEC-Q101 traceability, and consistent surge performance across production batches.
Supply support for SMBJ26AHE3_B/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 was engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and precise clamping behavior are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ26AHE3_B/I at its rated peak pulse current?
The SMBJ26AHE3_B/I has a maximum clamping voltage (VC) of 42.1 V at 14.3 A peak pulse current (10/1000 µs waveform). This value is measured under standardized surge conditions and guarantees that downstream circuitry sees no more than 42.1 V during a 600 W transient event - critical for protecting 36 V-rated components in 24 V systems. The SMBJ26AHE3_B/I maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMBJ26AHE3_B/I suitable for automotive applications?
Yes, SMBJ26AHE3_B/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and Vishay's documentation. It undergoes rigorous stress testing including high-temperature operating life (HTOL), temperature cycling (TCT), and ESD per AEC-Q101 Rev D. The SMBJ26AHE3_B/I is routinely deployed in engine control units, body control modules, and ADAS power supplies where sustained operation at +125 °C ambient and immunity to load-dump transients are required.
What does the "B/I" suffix mean in SMBJ26AHE3_B/I?
The "B/I" suffix in SMBJ26AHE3_B/I indicates packaging configuration: "B" denotes the revision level (Revision B per Vishay's internal change control), and "I" specifies 13-inch diameter plastic tape-and-reel delivery containing 3200 units. This format supports high-volume SMT assembly with standard pick-and-place feeders. The SMBJ26AHE3_B/I is fully compatible with JEDEC-standard DO-214AA footprint and reflow profiles.
How does SMBJ26AHE3_B/I compare to bidirectional TVS diodes like SMBJ26CA?
The SMBJ26AHE3_B/I is unidirectional and optimized for DC rail protection where polarity is fixed (e.g., 24 V supply to ground), offering lower leakage (1.0 µA vs. 5.0 µA for SMBJ26CA) and tighter VBR tolerance. In contrast, SMBJ26CA supports AC or floating signal lines but cannot be used in rectified DC paths without external blocking. For 24 V automotive power inputs, SMBJ26AHE3_B/I delivers superior leakage performance and is the preferred choice unless bidirectional symmetry is explicitly required.
What is the thermal resistance of SMBJ26AHE3_B/I, and how does it affect layout?
The SMBJ26AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - per JEDEC standards. To maintain reliability during repetitive surges, PCB layout must replicate this minimum pad area and use internal ground planes for heat spreading. Reducing pad size increases RθJA, risking thermal runaway; the SMBJ26AHE3_B/I's RθJL of 20 °C/W further emphasizes the need for low-inductance, wide-trace connections to ground.
SMBJ26AHE3_B/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:
- 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/I FAQ
1.How can I place an order for SMBJ26AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26AHE3_B/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_B/I reliable?
The price and inventory of SMBJ26AHE3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ26AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26AHE3_B/I?
SMBJ26AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26AHE3_B/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_B/I?
For technical support, including SMBJ26AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ26AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ26AHE3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ26AHE3_B/I?
All SMBJ26AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26AHE3_B/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_B/I part is unused and in its original packaging.
Return procedure for SMBJ26AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26AHE3_B/I Tags
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