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Vishay General Semiconductor - Diodes Division SMBG26CA-E3/5B
- Part No.:
- SMBG26CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG26CA-E3/5B.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG26CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of signal and power 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 automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the SMBG26CA-E3/5B datasheet, SMBG26CA-E3/5B pinout, SMBG26CA-E3/5B application, or SMBG26CA-E3/5B equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low incremental surge resistance, MSL Level 1 reflow compatibility, and verified 150 °C junction temperature operation under repetitive transients.
Technical Context
This device operates as a silicon avalanche diode configured for bidirectional transient suppression, with symmetrical breakdown characteristics in both polarities. Its glass-passivated junction ensures stable VBR tolerance (±5 % typical) and low leakage (<1.0 µA at 26 V), while the low Rsurge enables effective clamping during fast-rising ESD or lightning-induced surges.
The SMBG26CA-E3/5B is rated for 100 A non-repetitive forward surge (IFSM) and exhibits thermal resistance of 100 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads. It meets UL 497B recognition and complies with JESD22-B102 solderability and JESD201 Class 2 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed bidirectional breakdown range; ensures predictable turn-on across manufacturing lot and temperature. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to <43 V during 600 W transient events. |
| PPPM | 600 W - Peak pulse power handling per JEDEC standard; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out. |
| TJ max | +150 °C - Maximum junction temperature; enables reliable operation in under-hood automotive or high-ambient industrial environments. |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including HTOL, TCT, and ESD testing per stress test plan. |
Pinout & Package
Package: SMBG (DO-215AA) - surface-mount, low-profile (max height 1.96 mm), molded case meeting UL 94 V-0 flammability; matte tin-plated leads compliant with J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients; no polarity marking on device body. |
| Cathode | Transient current return path (bidirectional) | Electrically identical to Anode in bidirectional configuration; symmetric conduction enables single-device protection of AC or floating lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for dual unidirectional devices on differential or AC-coupled lines. |
| 600 W peak pulse power | Validated with 10/1000 µs waveform at 0.01 % duty cycle - sustains repeated surge events without parametric shift or degradation. |
| AEC-Q101 qualification | Includes HTOL, temperature cycling, and ESD testing - certifies suitability for automotive powertrain, body control, and ADAS sensor modules. |
| MSL Level 1 | Rated for peak reflow of 260 °C - supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial Fieldbus Interface |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines (CANH/CANL) or supply rail (VBAT/GND) to clamp surges before they reach PHY ICs. Use Value: Limits clamped voltage to 42.1 V during 14.3 A transients, preserving transceiver integrity in 12 V/24 V systems with AEC-Q101 traceability. | Use Scenario: Shielding RS-485/RS-422 transceivers in PLC backplanes and motor drive I/O modules from ground bounce and EFT. IC Role / Device Role / Timing Role: Placed between data lines and ground to absorb ±1 kV EFT bursts and 4 kV surge per IEC 61000-4-4/-4-5. Use Value: Delivers symmetrical clamping with <1.0 µA leakage at 26 V, minimizing signal distortion on high-impedance differential receivers. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHYs and PoE controllers against lightning-induced surges on RJ45 ports in outdoor switches. IC Role / Device Role / Timing Role: Installed on each twisted pair (e.g., pairs A/B) referenced to chassis ground to shunt common-mode transients. Use Value: Withstands 600 W pulses and maintains VC ≤ 42.1 V, enabling compliance with GR-1089-CORE Level 3 telecom surge requirements. | Use Scenario: Secondary-side overvoltage protection on 5 V/9 V/12 V USB PD and QC adapter outputs against regulator failure or feedback loop loss. IC Role / Device Role / Timing Role: Connected across output rails (VOUT/GND) to clamp fault voltages before damaging connected mobile devices. Use Value: Fast response time and low clamping voltage prevent downstream device latch-up or capacitor overvoltage during sustained overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA-E3/5B | Same VWM (26 V), but lower PPPM = 600 W (SMBJ series); identical SMB package but slightly different thermal profile (RθJA = 110 °C/W vs. 100 °C/W). | Approved for general industrial use; lacks AEC-Q101 qualification and UL 497B recognition. | Select SMBJ26CA-E3/5B only if automotive qualification and telecom safety certification are not required. |
| 1.5KE27CA | Higher PPPM = 1500 W, DO-201 package (larger footprint), VWM = 23.1 V, VC = 43.0 V - higher clamping and less precise VWM match. | Through-hole mounting; suited for prototyping or legacy PCBs where SMT is not feasible. | Choose 1.5KE27CA when board space allows larger package and higher surge margin is prioritized over AEC-Q101 compliance. |
Compared with SMBJ26CA-E3/5B and 1.5KE27CA, the SMBG26CA-E3/5B uniquely combines AEC-Q101 qualification, UL 497B recognition, SMBG's optimized thermal performance (100 °C/W), and exact 26 V stand-off matching 24 V system rails - making it the preferred choice for production automotive and certified telecom designs.
Availability
SMBG26CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial fieldbus interface, and telecom line interface requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG26CA-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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific validation.
The SMBG series was developed specifically for high-reliability surface-mount transient suppression in automotive, industrial, and telecom infrastructure - balancing compact size, AEC-Q101 compliance, and repeatable clamping performance under real-world surge conditions.
FAQ
What is the clamping voltage of SMBG26CA-E3/5B at its rated peak pulse current?
The SMBG26CA-E3/5B has a maximum clamping voltage (VC) of 42.1 V at 14.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured across both terminals in either polarity and reflects worst-case clamping behavior during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMBG26CA-E3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBG26CA-E3/5B suitable for automotive applications?
Yes, SMBG26CA-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. It passes high-temperature operating life (HTOL), temperature cycling, and ESD tests per the AEC-Q101 stress test schedule. Its 26 V stand-off voltage aligns with 24 V vehicle electrical systems, and its bidirectional clamping protects differential buses like CAN FD without polarity concerns. The SMBG26CA-E3/5B also carries UL 497B recognition for telecom-grade surge safety.
Does SMBG26CA-E3/5B have polarity markings on the package?
No, SMBG26CA-E3/5B does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMBG26A), the SMBG26CA-E3/5B has symmetrical electrical characteristics in both directions - meaning either terminal functions as anode or cathode depending on transient polarity. The device body is unmarked, and orientation during placement has no electrical impact. This simplifies layout and eliminates risk of reverse installation.
What is the maximum junction temperature rating for SMBG26CA-E3/5B?
The SMBG26CA-E3/5B has a maximum junction temperature (TJ) rating of +150 °C, validated per its thermal characterization and AEC-Q101 qualification. This enables reliable operation in high-ambient environments such as engine control units, industrial motor drives, and outdoor telecom enclosures. Its thermal resistance (RθJA) is 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads - a value confirmed in the official Vishay datasheet (Document Number: 88456, Rev. 09-Jan-2024). The SMBG26CA-E3/5B must be derated above 25 °C ambient per Figure 2 in that document.
How does SMBG26CA-E3/5B differ from unidirectional SMBG26A-E3/5B?
The SMBG26CA-E3/5B is bidirectional with symmetrical breakdown and clamping in both polarities, while SMBG26A-E3/5B is unidirectional and conducts only during reverse-biased transients (cathode-to-anode). The "CA" suffix denotes bidirectional capability, eliminating the need for external polarity awareness. SMBG26A-E3/5B has a forward voltage drop (~3.5 V at 50 A) and is unsuitable for AC or floating-line protection. In contrast, the SMBG26CA-E3/5B provides identical protection on both half-cycles - essential for CAN, RS-485, and Ethernet interfaces.
SMBG26CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBG26CA-E3/5B FAQ
1.How can I place an order for SMBG26CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG26CA-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 SMBG26CA-E3/5B reliable?
The price and inventory of SMBG26CA-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 SMBG26CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG26CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG26CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG26CA-E3/5B?
SMBG26CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG26CA-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 SMBG26CA-E3/5B?
For technical support, including SMBG26CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG26CA-E3/5B requirements.
6.How does Aetrix verify that SMBG26CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG26CA-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 SMBG26CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG26CA-E3/5B?
All SMBG26CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG26CA-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 SMBG26CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG26CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG26CA-E3/5B Tags
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