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Vishay General Semiconductor - Diodes Division SMBG26A-E3/5B
- Part No.:
- SMBG26A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG26A-E3/5B.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG26A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, featuring 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 42.1 V clamping voltage (VC) at 14.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed for overvoltage protection of MOSFETs and signal lines in automotive powertrain control units.
For engineers reviewing the SMBG26A-E3/5B datasheet, SMBG26A-E3/5B pinout, SMBG26A-E3/5B application, or SMBG26A-E3/5B equivalent, key selection criteria include verified unidirectional polarity, AEC-Q101 qualification, 150 °C maximum junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a shunt-clamping device that remains high-impedance below VWM = 26 V and rapidly transitions to low-impedance conduction above VBR (min 28.9 V), limiting transient voltages to ≤42.1 V at 14.3 A. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable breakdown behavior under repetitive surges.
Designed for industrial and automotive environments, SMBG26A-E3/5B meets MSL Level 1 per J-STD-020, supports peak surge current up to 100 A (8.3 ms half-sine), and exhibits thermal resistance of 100 °C/W (junction-to-ambient) when mounted on standard 0.2" × 0.2" copper pads - enabling robust protection without active thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage during 10/1000 μs transient; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; validates survivability against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms); supports protection against load dump events in 12 V automotive systems. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood ECUs and industrial motor drives. |
| Leakage @ VWM | ≤1.0 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in always-on circuits. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leadform with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected line (e.g., battery rail or signal trace); conducts surge current toward ground path. |
| Cathode | Current exit terminal during clamping | Connected to system ground; polarity marking (band) ensures correct orientation during PCB assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements including HTOL, TCT, and ESD. |
| 600 W peak pulse power (10/1000 μs) | Withstands high-energy transients common in 12 V vehicle electrical systems without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in MOSFETs. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without moisture-related popcorn failure. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage across temperature and humidity variations. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of MCU I/O and gate drivers against load dump and inductive switching spikes in engine control modules. IC Role / Device Role: Shunt-clamping TVS placed between 12 V supply rail and chassis ground. Use Value: Limits transient voltage to ≤42.1 V during 100 A load dump events, preventing reset or permanent damage to 3.3 V/5 V logic interfaces. | Use Scenario: Safeguarding analog sensor inputs (e.g., current sense amplifiers) from EMI-induced surges in variable frequency drives. IC Role / Device Role: Unidirectional TVS connected across differential input pins of instrumentation amplifiers. Use Value: Maintains <1.0 μA leakage at 26 V, preserving measurement accuracy while clamping >1 kV transients to safe levels. |
| Telecom Line Interface Protection | Consumer Power Adapter Secondary Side |
Use Scenario: Surge suppression on RS-485 bus lines exposed to lightning-induced surges in outdoor base stations. IC Role / Device Role: Bidirectional-capable variant family member used in unidirectional configuration for DC-biased data lines. Use Value: Delivers 600 W pulse handling with 42.1 V clamping, meeting ITU-T K.20 and IEC 61000-4-5 Level 3 immunity requirements. | Use Scenario: Overvoltage clamp on secondary-side 5 V/9 V output rails of USB-C PD adapters subjected to hot-plug transients. IC Role / Device Role: Standoff-rated TVS placed between output rail and ground to absorb coupling noise from primary-side switching. Use Value: Enables compact layout with DO-215AA footprint and eliminates need for external series impedance due to low dynamic resistance. |
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), but lower PPPM = 600 W and higher VC = 42.5 V; identical SMB (DO-213AA) package outline but smaller body height. | Lower thermal mass limits sustained surge duty cycle; not AEC-Q101 qualified. | Select SMBJ26A-E3/5B only for cost-sensitive consumer applications where automotive qualification is unnecessary. |
| SMCJ26A-E3/5B | Same VWM and VC, but higher PPPM = 1500 W and larger SMC (DO-214AB) package; 10× higher IPPM (35.2 A). | Requires larger PCB area and higher mounting pad thermal mass; suited for primary-side AC/DC input protection. | Choose SMCJ26A-E3/5B when protecting high-energy nodes like rectifier outputs or battery inputs where 600 W is insufficient. |
Compared with SMBJ26A-E3/5B, SMBG26A-E3/5B offers AEC-Q101 qualification and tighter thermal resistance (100 vs. 120 °C/W), while SMCJ26A-E3/5B provides triple the pulse power at the expense of footprint size - making SMBG26A-E3/5B optimal for space-constrained, automotive-grade secondary-side protection.
Availability
SMBG26A-E3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, telecom infrastructure, and consumer power adapter designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG26A-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 optoelectronics with emphasis on reliability, AEC-Q qualification, and application-specific performance.
The SMBG series was engineered for high-reliability surface-mount transient suppression in automotive and industrial environments, balancing compact DO-215AA packaging with 600 W pulse capability and AEC-Q101 compliance.
FAQ
What is the maximum clamping voltage of SMBG26A-E3/5B at its rated peak pulse current?
The SMBG26A-E3/5B has a maximum clamping voltage (VC) of 42.1 V at its specified peak pulse current (IPPM) of 14.3 A under a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected circuitry downstream will not experience voltage stress exceeding 42.1 V during standardized surge events - a critical parameter for ensuring compatibility with 3.3 V or 5 V logic interfaces in the SMBG26A-E3/5B application space.
Is SMBG26A-E3/5B suitable for automotive applications?
Yes, SMBG26A-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including powertrain control modules and body electronics. Its construction features glass-passivated junctions, MSL Level 1 reflow compatibility, and guaranteed operation from –55 °C to +150 °C - all validated per AEC stress test requirements. The SMBG26A-E3/5B datasheet confirms qualification status in the Mechanical Data section, making it appropriate for under-hood and chassis-mounted systems where reliability under thermal and mechanical stress is mandatory.
What does the "E3/5B" suffix indicate in SMBG26A-E3/5B?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "5B" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This format supports high-volume automated SMT assembly and aligns with Vishay's standard ordering nomenclature for the SMBG family. The SMBG26A-E3/5B part number uniquely identifies this configuration - distinct from E3/52 (7-inch reel, 750 units) or HE3/5B (AEC-Q101 version).
How does SMBG26A-E3/5B differ from bidirectional TVS diodes like SMBG26CA?
SMBG26A-E3/5B is unidirectional, meaning it conducts only in reverse bias above VBR and blocks forward current beyond ~3.5 V, whereas SMBG26CA is bidirectional with symmetrical clamping in both polarities. The unidirectional SMBG26A-E3/5B is preferred for DC-biased lines (e.g., 12 V supply rails), offering lower leakage and sharper knee characteristics. In contrast, SMBG26CA suits AC-coupled or floating signal paths like RS-485, where polarity reversal must be tolerated - a functional distinction confirmed in the Vishay SMBG5.0A–SMBG188CA datasheet primary characteristics table.
What is the thermal resistance of SMBG26A-E3/5B, and how does it affect layout design?
SMBG26A-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 minimum recommended pad layout per the Vishay package drawing; reducing pad area increases RθJA, risking thermal runaway during repetitive surges. For reliable SMBG26A-E3/5B operation in high-duty-cycle applications, designers must maintain full copper pour under both terminals and avoid excessive trace length or narrow routing that impedes heat dissipation.
SMBG26A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG26A-E3/5B FAQ
1.How can I place an order for SMBG26A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG26A-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 SMBG26A-E3/5B reliable?
The price and inventory of SMBG26A-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 SMBG26A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG26A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG26A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG26A-E3/5B?
SMBG26A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG26A-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 SMBG26A-E3/5B?
For technical support, including SMBG26A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG26A-E3/5B requirements.
6.How does Aetrix verify that SMBG26A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG26A-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 SMBG26A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG26A-E3/5B?
All SMBG26A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG26A-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 SMBG26A-E3/5B part is unused and in its original packaging.
Return procedure for SMBG26A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG26A-E3/5B Tags
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