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Vishay General Semiconductor - Diodes Division SMBJ26-E3/5B
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- Part No.:
- SMBJ26-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26-E3/5B.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,910
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Product details
Overview
SMBJ26-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power 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 10/1000 µs waveform - deployed in industrial motor drives and automotive body control modules.
For engineers reviewing the SMBJ26-E3/5B datasheet, SMBJ26-E3/5B pinout, SMBJ26-E3/5B application, or SMBJ26-E3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, JEDEC-compliant SMB package dimensions, and AEC-Q101-qualified alternatives for automotive-grade transient protection design.
Technical Context
This unidirectional TVS operates as a voltage-clamping device triggered by reverse-biased avalanche breakdown. Its 1.0 µA max reverse leakage at 26 V ensures minimal standby power loss, while the 0.097 %/°C temperature coefficient of VBR enables stable clamping across -55 °C to +150 °C junction temperature range.
The device sustains 100 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits low incremental surge resistance, enabling rapid energy absorption during ESD or load-switching events. Thermal resistance is 100 °C/W junction-to-ambient (on 0.2" × 0.2" copper pads) and 20 °C/W junction-to-lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage during 600 W transient; limits downstream IC stress to safe levels |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; meets IEC 61000-4-5 Level 4 surge immunity |
| IFSM | 100 A - Single half-sine surge current rating (8.3 ms); supports high-energy inductive kickback suppression |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures |
| RθJA | 100 °C/W - Thermal resistance on standard PCB pad layout; informs heatsinking requirements for repetitive surges |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant (E3 suffix), MSL Level 1 (JEDEC J-STD-020), 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamp output node | Connected to protected line; conducts avalanche current to anode during overvoltage event |
| Anode | Reference/return path | Typically tied to ground or low-impedance return plane; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 surge events without derating in standard layouts |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage stress on downstream MOSFET gates or MCU I/O pins during transients |
| 100 A IFSM rating | Supports suppression of high-current inductive spikes from solenoids, relays, and motors |
| MSL Level 1 moisture sensitivity | Eliminates bake-out requirement prior to reflow, reducing manufacturing cost and process complexity |
| AEC-Q101 qualification option (HE3 suffix) | Validates reliability for automotive applications including engine control units and ADAS sensor interfaces |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver power rails from load-dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamping reverse-polarity and surge events on 12 V supply lines feeding MCUs and drivers. Use Value: Limits clamped voltage to 42.1 V, well below 48 V absolute maximum ratings of common automotive MCUs and transceivers. |
Use Scenario: Safeguarding 24 V DC digital input circuits in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed between field input and optocoupler input stage. Use Value: Sub-1 ns response time and 42.1 V clamping prevent false triggering and latch-up in isolation barriers during 1 kV/500 A surge events. |
| Telecom Power Supply Rail | Consumer Appliance Motor Driver |
|
Use Scenario: Shielding DC-DC converter inputs in telecom base station power supplies from lightning-induced surges on -48 V distribution buses. IC Role / Device Role / Timing Role: Primary-level transient suppressor on bulk input rail upstream of active regulation stages. Use Value: 600 W pulse rating and 100 °C/W RθJA allow sustained operation without thermal runaway under repeated 10/1000 µs surges. |
Use Scenario: Protecting gate drivers and bootstrap circuits in BLDC motor inverters within washing machines and HVAC systems. IC Role / Device Role / Timing Role: Clamp induced transients from motor phase switching and regenerative braking feedback. Use Value: 14.3 A IPPM and 42.1 V VC ensure gate oxide integrity and prevent shoot-through in half-bridge FETs during commutation spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy | Direct material substitution when halogen-free BOMs are required; same thermal and mechanical footprint |
| SMBJ26AHM3_B/I | AEC-Q101 qualified, halogen-free, 13" tape-and-reel packaging; otherwise matches SMBJ26-E3/5B electrically | Required for automotive production programs needing PPAP documentation and extended reliability validation | Preferred for Tier 1 automotive designs where AEC-Q101 qualification and traceability are contractually enforced |
Compared with SMBJ26-E3/5B, the M3/5B variant offers identical protection performance with halogen-free construction, while the HM3_B/I version adds AEC-Q101 qualification and full automotive traceability - enabling drop-in use in commercial systems or mandatory deployment in automotive ECUs.
Availability
SMBJ26-E3/5B is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and telecom power supply designs requiring stable component supply, RoHS compliance, and surface-mount manufacturability.
Supply support for SMBJ26-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, TVS devices, and power MOSFETs with emphasis on reliability and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ESD, EFT, and surge events is mission-critical.
FAQ
What is the clamping voltage of SMBJ26-E3/5B at its rated peak pulse current?
The SMBJ26-E3/5B has a maximum clamping voltage (VC) of 42.1 V at 14.3 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream components. The SMBJ26-E3/5B maintains this clamping performance across its specified operating temperature range.
Is SMBJ26-E3/5B suitable for automotive applications?
SMBJ26-E3/5B itself is commercial-grade and RoHS-compliant but not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ26AHM3_B/I variant - which shares identical electrical characteristics and SMB package but adds AEC-Q101 qualification, halogen-free construction, and full PPAP support. The SMBJ26-E3/5B may be used in non-safety-critical automotive subsystems pending internal validation.
What is the thermal resistance of SMBJ26-E3/5B, and how does it affect layout?
The SMBJ26-E3/5B 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. This value assumes standard JEDEC layout; increasing copper area or adding thermal vias reduces RθJA, improving surge repetition capability. The SMBJ26-E3/5B's RθJL is 20 °C/W, supporting efficient heat transfer to PCB planes.
How does SMBJ26-E3/5B differ from bidirectional variants like SMBJ26CA?
SMBJ26-E3/5B is unidirectional, with cathode marked by a band and intended for DC line protection where polarity is fixed. Bidirectional variants like SMBJ26CA lack polarity marking and clamp transients in both directions - suitable for AC lines or differential signal pairs. Electrical specs (VWM, VBR, VC) differ: SMBJ26CA has VWM = 26 V but symmetric breakdown, whereas SMBJ26-E3/5B only conducts in reverse bias.
What packaging options are available for SMBJ26-E3/5B?
SMBJ26-E3/5B ships in 13" diameter plastic tape-and-reel format with 3200 units per reel (package code "5B"). It is also available in 7" tape-and-reel (code "52", 750 units) and alternative suffixes like HE3 for AEC-Q101 versions. All variants retain the same SMB (DO-214AA) outline and soldering profile per J-STD-020 MSL Level 1.
SMBJ26-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 12.9A
- 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)
SMBJ26-E3/5B FAQ
1.How can I place an order for SMBJ26-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26-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 SMBJ26-E3/5B reliable?
The price and inventory of SMBJ26-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 SMBJ26-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ26-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26-E3/5B?
SMBJ26-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26-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 SMBJ26-E3/5B?
For technical support, including SMBJ26-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26-E3/5B requirements.
6.How does Aetrix verify that SMBJ26-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ26-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 SMBJ26-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ26-E3/5B?
All SMBJ26-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26-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 SMBJ26-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ26-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26-E3/5B Tags
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