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Vishay General Semiconductor - Diodes Division SMBJ26C-E3/5B
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- Part No.:
- SMBJ26C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26C-E3/5B.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,051
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Product details
Overview
SMBJ26C-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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.
For engineers reviewing the SMBJ26C-E3/5B datasheet, SMBJ26C-E3/5B pinout, SMBJ26C-E3/5B application, or SMBJ26C-E3/5B equivalent, key selection criteria include clamping performance under 14.3 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity with cathode band marking, and RoHS-compliant matte tin-plated leads suitable for automated placement on consumer, industrial, and telecom PCBs.
Technical Context
This TVS diode operates as a fast-acting shunt protector that clamps transient overvoltages above its breakdown threshold while maintaining low leakage (<1.0 µA at 26 V) during normal operation. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
The device complies with ANSI/IEEE C62.35 standards for surge protection and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C lead-free reflow compatibility. Its 100 °C/W junction-to-ambient thermal resistance requires appropriate copper pad layout (0.2" × 0.2") to sustain 5.0 W steady-state power dissipation at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before conduction begins; defines system operating margin. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on under surge conditions. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamping voltage limits downstream IC/MOSFET stress during 10/1000 µs transients. |
| PPPM | 600 W - Peak pulse power handling capacity with 0.01% duty cycle; supports high-energy surge immunity. |
| IPPM | 14.3 A - Peak pulse current capability derived from 10/1000 µs waveform; determines minimum trace width and fuse sizing. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; mandates ≥5.0 mm × 5.0 mm copper pads per terminal for thermal management. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in industrial ambient environments up to +85 °C with derating. |
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 indicated by cathode band on unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to protected circuit ground or low-side reference; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Surge sink | Marked with band; connected to line/voltage rail being protected; conducts avalanche current when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping accuracy for 3.3 V/5 V logic interfaces. |
| Glass passivated chip junction | Ensures stable VBR over temperature and lifetime, with <0.1 %/°C drift coefficient for precision hold-off. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without popcorn cracking or delamination risks. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance requirements without halogen restrictions or automotive qualification overhead. |
Applications
| Industrial Motor Drive Control | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O lines from inductive kickback during relay or solenoid switching. IC Role / Device Role / Timing Role: Shunt clamping element placed across MOSFET gate-source or MCU input pins to limit voltage excursions to ≤42.1 V. Use Value: Prevents latch-up or oxide damage in 3.3 V/5 V logic circuits exposed to >100 V transients in 24 V DC systems. |
Use Scenario: Safeguarding LIN bus transceivers and sensor signal conditioning circuits from load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground to clamp negative-going spikes while preserving signal integrity. Use Value: Maintains <1 µA leakage at 26 V standby, ensuring minimal impact on bus quiescent current and wake-up sensitivity. |
| Telecom Power Supply Input | Consumer USB-C ESD/Transient Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 24 V/48 V telecom rectifier outputs feeding PoE injectors or baseband processors. IC Role / Device Role / Timing Role: Standoff-rated protector placed after bulk filter capacitor to absorb residual switching transients and lightning-induced surges. Use Value: 42.1 V clamping ensures downstream DC-DC converters remain within absolute maximum ratings during 600 W surge events. |
Use Scenario: Front-end protection for USB-C CC and VBUS lines against hot-plug transients and electrostatic discharge. IC Role / Device Role / Timing Role: Unidirectional clamp on VBUS rail referenced to GND, activated only during overvoltage faults above 26 V. Use Value: Fast response time and low capacitance (<100 pF typical) prevent signal distortion on high-speed USB 2.0 data paths. |
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-E3/5B | Same VWM (26 V), identical VBR (28.9–31.9 V), same SMB package and pinout. | No functional difference; "A" suffix denotes standard unidirectional version; "C" suffix is legacy marking variant with identical specs. | Select SMBJ26A-E3/5B if sourcing newer production lots-identical electrical and mechanical behavior. |
| SMCJ26A-E3/57T | Higher 1500 W PPPM, larger SMC (DO-214AB) package, same VWM/VBR but 39.4 V VC at 38.9 A. | Used where higher surge energy (e.g., IEC 61000-4-5 Level 5) or improved thermal mass is required. | Choose SMCJ26A-E3/57T only when board space allows larger footprint and 1500 W rating is mandatory. |
Compared with SMBJ26C-E3/5B, SMBJ26A-E3/5B offers identical protection performance in the same compact SMB package, while SMCJ26A-E3/57T trades size for 2.5× higher surge capacity and lower clamping ratio-but requires PCB redesign and thermal analysis.
Availability
SMBJ26C-E3/5B is available at Aetrix Electronics and suitable for industrial motor control, telecom power supply input, automotive body electronics, and consumer USB interface protection requiring stable component supply and full traceability.
Supply support for SMBJ26C-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-reliability transient suppression in space-constrained surface-mount applications across automotive, industrial, and communications infrastructure, balancing clamping performance with manufacturability.
FAQ
What is the clamping voltage of SMBJ26C-E3/5B at its rated peak pulse current?
The SMBJ26C-E3/5B has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 14.3 A, measured under the standardized 10/1000 µs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is confirmed in Vishay's datasheet Document Number 88392, page 2.
Is SMBJ26C-E3/5B RoHS-compliant and lead-free assembly compatible?
Yes, SMBJ26C-E3/5B carries the "E3" suffix, indicating it is RoHS-compliant and qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C per J-STD-020 MSL Level 1. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements, making SMBJ26C-E3/5B suitable for modern automated PCB assembly lines.
How does the breakdown voltage range of SMBJ26C-E3/5B compare to its stand-off voltage?
The SMBJ26C-E3/5B has a stand-off voltage (VWM) of 26 V and a minimum breakdown voltage (VBR) of 28.9 V at 1 mA test current, providing a guaranteed 2.9 V margin to prevent false triggering during normal operation. The maximum VBR is 31.9 V, resulting in a total tolerance window of ±11.5 % around the nominal 26 V rating.
Can SMBJ26C-E3/5B be used in bidirectional protection applications?
No, SMBJ26C-E3/5B is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMBJ26CA). Using SMBJ26C-E3/5B in AC-coupled or symmetrical signal lines would result in forward conduction during negative half-cycles, potentially damaging the device or circuit.
What is the thermal resistance and recommended PCB layout for SMBJ26C-E3/5B?
SMBJ26C-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, measured with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained power dissipation, designers must implement these minimum pad dimensions and avoid excessive trace length or narrow routing between terminals.
SMBJ26C-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ26C-E3/5B FAQ
1.How can I place an order for SMBJ26C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26C-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 SMBJ26C-E3/5B reliable?
The price and inventory of SMBJ26C-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 SMBJ26C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ26C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26C-E3/5B?
SMBJ26C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26C-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 SMBJ26C-E3/5B?
For technical support, including SMBJ26C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26C-E3/5B requirements.
6.How does Aetrix verify that SMBJ26C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ26C-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 SMBJ26C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ26C-E3/5B?
All SMBJ26C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26C-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 SMBJ26C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ26C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26C-E3/5B Tags
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