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Vishay General Semiconductor - Diodes Division SMBJ26-E3/52
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- Part No.:
- SMBJ26-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26-E3/52.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,430
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Product details
Overview
SMBJ26-E3/52 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 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 on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ26-E3/52 datasheet, SMBJ26-E3/52 pinout, SMBJ26-E3/52 application, or SMBJ26-E3/52 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and direct-fit alternatives for ESD and lightning-induced transient suppression in 24 V DC systems.
Technical Context
This TVS diode operates as a unidirectional shunt protector: it remains high-impedance below VWM = 26 V and rapidly avalanches above VBR to clamp transients. Its low incremental surge resistance (typical <0.5 Ω) ensures minimal voltage overshoot during fast-rising surges up to 14.3 A (10/1000 µs).
Thermal design relies on RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, enabling reliable operation up to TJ = 150 °C. The device meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 26 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets system DC rail compatibility. |
| VBR (Breakdown) | 28.9–31.9 V at IT = 1 mA - Confirmed avalanche onset range; defines minimum clamping threshold under surge. |
| VC (Clamping) | 42.1 V at IPPM = 14.3 A (10/1000 µs) - Peak voltage seen by protected IC during worst-case surge; must stay below downstream IC's absolute max rating. |
| PPPM | 600 W - Sustained transient energy absorption capability; validates suitability for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| IPPM | 14.3 A - Peak surge current handled at rated clamping voltage; determines minimum series impedance needed upstream. |
| TJ max. | 150 °C - Maximum junction temperature; constrains PCB copper area and ambient operating range in sealed enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline; compatible with automated pick-and-place and reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; forms current sink during avalanche conduction. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail); polarity band identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity requirements for industrial equipment. |
| 42.1 V clamping at 14.3 A | Ensures protected 24 V logic or sensor interfaces remain within safe operating area during 1 kV surge events. |
| Low incremental surge resistance | Minimizes dynamic voltage overshoot during fast transients (<1 ns response time), critical for MOSFET gate protection. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free assembly without moisture-related popcorning or delamination risks. |
| AEC-Q101 qualified variant available | Supports automotive-grade reliability validation (e.g., SMBJ26HE3); not applicable to standard SMBJ26-E3/52 but confirms process maturity. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC power input against load dump and inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND, clamping transients before they reach DC-DC converters and microcontrollers. Use Value: Limits voltage excursion to ≤42.1 V during 14.3 A surges, preventing latch-up or permanent damage to 36 V-rated power management ICs. |
Use Scenario: Surge suppression on LIN bus or sensor supply lines exposed to battery transients in vehicle cabins. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V/24 V auxiliary rails feeding Hall-effect sensors and LED drivers. Use Value: Maintains signal integrity by clamping spikes within 1 ns while drawing <1 µA leakage at 26 V, minimizing standby current impact. |
| Telecom Power Feeds | PLC Digital I/O Modules |
|
Use Scenario: Input-stage protection for PoE-powered remote units subjected to lightning-induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Primary shunt protector on secondary-side 24 V bias rail, coordinated with upstream gas discharge tube (GDT). Use Value: Provides precise 26 V standoff and 42.1 V clamping to avoid false triggering while absorbing 600 W surge energy without degradation. |
Use Scenario: Output protection for 24 V sinking/sourcing digital outputs driving valves and indicators in factory automation. IC Role / Device Role / Timing Role: Back-to-back placement across output transistor collector-emitter or drain-source to suppress inductive flyback. Use Value: Withstands repetitive 100 A non-repetitive forward surge (IFSM) and clamps flyback to <43 V, preserving MOSFET SOA. |
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-E3/52 | Same electrical specs and package; identical marking code "ME" and VBR/VC values; E3 suffix denotes RoHS-compliant commercial grade. | No functional difference; direct form-fit-function replacement with identical tape-and-reel packaging (750 pcs/52 reel). | Select when sourcing consistency with Vishay's standard commercial-grade SMBJ26A designation is required. |
| SMCJ26A-E3/52 | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package; 1500 W PPPM rating vs. 600 W. | Higher surge margin suits harsher environments (e.g., outdoor telecom cabinets); requires PCB layout change due to larger footprint. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space allows SMC footprint. |
Compared with SMBJ26-E3/52, SMBJ26A-E3/52 offers identical protection performance in the same SMB package, while SMCJ26A-E3/52 trades compactness for 2.5× higher surge power handling - requiring layout revision but enabling longer lifetime in high-energy transient environments.
Availability
SMBJ26-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and PLC digital I/O modules requiring stable component supply and consistent surge immunity performance.
Supply support for SMBJ26-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, rectifiers, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The SMBJ series was developed for high-reliability transient suppression in space-constrained industrial and automotive applications, balancing low-profile packaging with robust 600 W surge capability.
FAQ
What is the breakdown voltage range of SMBJ26-E3/52?
The SMBJ26-E3/52 has a guaranteed breakdown voltage (VBR) range of 28.9 V to 31.9 V at test current IT = 1 mA, per Vishay Document 88392. This range ensures predictable avalanche initiation across manufacturing lots and temperature extremes, directly supporting design margin calculations for 24 V systems where clamping must occur above nominal rail voltage but below downstream IC limits. The SMBJ26-E3/52 maintains this specification across its full operating temperature range of –55 °C to +150 °C.
Does SMBJ26-E3/52 meet automotive qualification standards?
The SMBJ26-E3/52 itself is a commercial-grade part (E3 suffix) and is not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ26HE3 variant - which shares the same VWM, VBR, and VC specs - explicitly qualified to AEC-Q101 for automotive use. Engineers selecting SMBJ26-E3/52 should verify whether their application requires automotive qualification; if so, SMBJ26HE3 is the designated drop-in alternative with validated reliability testing per stress test conditions defined in AEC-Q101.
What is the maximum clamping voltage of SMBJ26-E3/52 under surge conditions?
The SMBJ26-E3/52 exhibits a maximum clamping voltage (VC) of 42.1 V at peak pulse current IPPM = 14.3 A with a 10/1000 µs waveform. This value is measured under standardized test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and represents the worst-case voltage imposed on protected circuitry during surge events. Designers must ensure that all downstream components - such as DC-DC controllers or interface ICs - have absolute maximum ratings exceeding 42.1 V to guarantee robust operation. The SMBJ26-E3/52 achieves this clamping with sub-nanosecond response time and low dynamic impedance.
Can SMBJ26-E3/52 be used in bidirectional configurations?
No - SMBJ26-E3/52 is a unidirectional TVS diode, identified by its cathode band marking and specified only for reverse-biased operation. For bidirectional protection, Vishay offers the SMBJ26CA variant (with CA suffix), which provides symmetrical clamping in both polarities and is marked without polarity band. Attempting to use SMBJ26-E3/52 in bidirectional mode would result in forward conduction and potential failure during positive transients. Always match the device type (A = unidirectional, CA = bidirectional) to the signal or power line polarity requirements. The SMBJ26-E3/52 datasheet explicitly restricts usage to unidirectional applications.
What is the thermal resistance of SMBJ26-E3/52, and how does it affect layout?
The SMBJ26-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, and a junction-to-lead resistance (RθJL) of 20 °C/W. These values dictate PCB copper area requirements: reducing pad size increases RθJA, raising junction temperature during repetitive surges and accelerating parametric drift. For continuous operation near TJ = 150 °C, designers must either increase copper area or limit surge duty cycle. The SMBJ26-E3/52's thermal performance is validated only with the specified pad layout per Vishay Document 88392.
SMBJ26-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:
- 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-E3/52 FAQ
1.How can I place an order for SMBJ26-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26-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 SMBJ26-E3/52 reliable?
The price and inventory of SMBJ26-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 SMBJ26-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ26-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26-E3/52?
SMBJ26-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26-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 SMBJ26-E3/52?
For technical support, including SMBJ26-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26-E3/52 requirements.
6.How does Aetrix verify that SMBJ26-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ26-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 SMBJ26-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ26-E3/52?
All SMBJ26-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26-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 SMBJ26-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ26-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26-E3/52 Tags
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