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Vishay General Semiconductor - Diodes Division SMB8J26CA-E3/5B
- Part No.:
- SMB8J26CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CA-E3/5B.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J26CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 26 V standoff voltage (VWM), 42.1 V maximum clamping voltage (VC) at 19.0 A peak pulse current (IPPM), and 800 W peak pulse power (10/1000 µs waveform), making it suitable for automotive sensor interface protection and industrial I/O line hardening.
For engineers reviewing the SMB8J26CA-E3/5B datasheet, SMB8J26CA-E3/5B pinout, SMB8J26CA-E3/5B application, or SMB8J26CA-E3/5B equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, low leakage (<1.0 µA at VWM), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ at 26 V), but triggers into low-impedance conduction when transients exceed its 28.9–31.9 V breakdown range (VBR at 1.0 mA). Its glass-passivated junction ensures stable avalanche characteristics and fast response (<1 ns).
Thermally, it sustains operation from −55 °C to +150 °C junction temperature, with RθJA = 72 °C/W (typ.) on recommended pad layout and RθJL = 20 °C/W - enabling reliable performance in compact automotive ECUs and industrial controllers without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines safe signal swing margin in protected circuits. |
| VBR (min/max) | 28.9 V / 31.9 V at 1.0 mA - Ensures consistent triggering across production lots; guarantees clamping initiates above system nominal voltage. |
| VC @ IPPM | 42.1 V at 19.0 A (10/1000 µs) - Limits worst-case voltage seen by downstream ICs during 800 W surge events. |
| PPPM | 800 W - Peak power dissipation capability for standardized lightning/surge immunity testing (IEC 61000-4-5 Level 4). |
| IFSM | Not applicable - Bidirectional configuration lacks forward surge rating; only unidirectional variants specify 100 A 8.3 ms half-sine rating. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and sealed industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile (max height 1.95 mm), UL 94 V-0 molded compound, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Transient return path for positive excursions | Provides symmetrical clamping: conducts during both polarity surges - no polarity marking required on bidirectional devices. |
| Cathode (unmarked end) | Transient return path for negative excursions | Identical terminal function to anode; terminals are interchangeable - enables flexible PCB layout without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics - eliminates need for additional qualification testing. |
| Bidirectional clamping | Protects AC-coupled or floating signal lines (e.g., CAN, LIN, RS-485) against ± surges without external polarity management. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress - critical for 15+ year automotive service life. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - supports high-yield automated assembly. |
| Low ID at VWM | ≤1.0 µA leakage at 26 V - prevents signal distortion or battery drain in always-on sensor interfaces and low-power IoT nodes. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly at connector entry point to clamp transients before reaching precision ADC front-end. Use Value: Limits induced voltage to ≤42.1 V during 800 W surges, preserving sensor signal integrity and preventing ADC saturation or latch-up. |
Use Scenario: Safeguarding 24 V DC digital input channels on PLC modules subjected to inductive switching noise from solenoid valves. IC Role / Device Role / Timing Role: Bidirectional clamping element across input terminals to absorb both positive and negative flyback energy. Use Value: Withstands repetitive 19.0 A surges while maintaining <1.0 µA leakage - avoids false triggering and ensures stable logic-level recognition. |
| Telecom Line Interface | Consumer USB Port Protection |
|
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul equipment from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Primary surge suppression device on differential bus lines, coordinated with common-mode chokes. Use Value: Clamps common-mode transients to <42.1 V within <1 ns, meeting IEC 61000-4-5 Level 4 requirements without degrading data rate. |
Use Scenario: Adding robust ESD and surge protection to USB 2.0 D+/D− lines in portable medical monitors with touch interfaces. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to USB connector to divert ±15 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity with minimal added capacitance (typ. <100 pF at 0 V), preserving USB 2.0 eye diagram compliance. |
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/VC ratings but rated for 600 W PPPM (vs. 800 W); lower IPPM (15.2 A vs. 19.0 A). | Insufficient for IEC 61000-4-5 Level 4 testing where 800 W is mandated; suitable only for Level 3 or lower-risk consumer ports. | Select SMB8J26CA-E3/5B when full 800 W surge headroom is required for automotive or industrial compliance. |
| SMCJ26CA-E3/57T | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass (RθJA = 35 °C/W vs. 72 °C/W). | Requires larger PCB footprint and may not fit space-constrained modules; better suited for high-repetition surge environments. | Choose SMB8J26CA-E3/5B for space-limited automotive sensors; choose SMCJ26CA-E3/57T only if thermal cycling endurance >100,000 cycles is required. |
Compared with SMBJ26CA-E3/5B and SMCJ26CA-E3/57T, SMB8J26CA-E3/5B uniquely delivers 800 W surge capacity in the compact SMB footprint while maintaining AEC-Q101 qualification - making it the optimal choice for next-generation automotive and industrial edge nodes where size, power, and qualification must coexist.
Availability
SMB8J26CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer USB port hardening requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J26CA-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, efficiency, and application-specific optimization.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in automotive and harsh-environment industrial systems.
FAQ
What is the clamping voltage of SMB8J26CA-E3/5B at its rated peak pulse current?
The SMB8J26CA-E3/5B has a maximum clamping voltage (VC) of 42.1 V when subjected to its specified peak pulse current of 19.0 A using the 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMB8J26CA-E3/5B suitable for automotive applications?
Yes, SMB8J26CA-E3/5B is AEC-Q101 qualified and manufactured with RoHS-compliant materials, making it approved for automotive use in engine control units, ADAS sensors, and body electronics. Its bidirectional architecture, 150 °C maximum junction temperature, and validation across temperature cycling, HTRB, and ESD tests confirm suitability for under-hood and cabin-mounted systems.
How does SMB8J26CA-E3/5B differ from unidirectional variants like SMB10J26A?
SMB8J26CA-E3/5B is bidirectional with symmetric clamping for both polarities and no cathode band marking, whereas SMB10J26A is unidirectional with a cathode band and specifies IFSM = 100 A (8.3 ms). The "8" prefix denotes 800 W rating (vs. 1000 W for SMB10JxxA), and the "C" suffix explicitly indicates bidirectionality - essential for protecting AC-coupled or floating signal paths.
What is the thermal resistance of SMB8J26CA-E3/5B, and how does it affect layout design?
SMB8J26CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This requires adherence to Vishay's recommended pad layout to avoid thermal derating; reducing pad area increases RθJA, potentially limiting surge repetition rate or causing premature failure under sustained stress.
Does SMB8J26CA-E3/5B have a defined polarity marking on the package?
No, SMB8J26CA-E3/5B does not feature a polarity marking such as a cathode band because it is a bidirectional TVS diode. Both terminals are functionally identical and interchangeable - simplifying PCB layout and eliminating orientation errors during automated placement. This contrasts with unidirectional variants like SMB10J26A, which include a visible cathode band.
SMB8J26CA-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:
- 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):
- 19A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J26CA-E3/5B FAQ
1.How can I place an order for SMB8J26CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CA-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 SMB8J26CA-E3/5B reliable?
The price and inventory of SMB8J26CA-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 SMB8J26CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J26CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CA-E3/5B?
SMB8J26CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CA-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 SMB8J26CA-E3/5B?
For technical support, including SMB8J26CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J26CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J26CA-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 SMB8J26CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J26CA-E3/5B?
All SMB8J26CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CA-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 SMB8J26CA-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J26CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CA-E3/5B Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Diodes Incorporated
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