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Vishay General Semiconductor - Diodes Division SMB8J26C-E3/52
- Part No.:
- SMB8J26C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26C-E3/52.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,961
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Product details
Overview
SMB8J26C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on signal and power lines. It features 26 V stand-off voltage (VWM), 42.1 V clamping voltage (VC) at 19.0 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform. Used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers against ESD and lightning-induced transients.
For engineers reviewing the SMB8J26C-E3/52 datasheet, SMB8J26C-E3/52 pinout, SMB8J26C-E3/52 application, or SMB8J26C-E3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low leakage (<1.0 µA at 26 V), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive surge stress.
Designed per ANSI/IEEE C62.35 standards, SMB8J26C-E3/52 delivers fast response time (<1 ns), meets MSL level 1 (260 °C reflow), and supports operation from –55 °C to +150 °C junction temperature. The device is qualified to AEC-Q101, confirming suitability for automotive under-hood and infotainment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected circuitry. |
| VBR min / max | 28.9 V / 31.9 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on threshold across production lot. |
| VC @ IPPM | 42.1 V - Clamped voltage seen by downstream circuit during 19.0 A 10/1000 µs surge; limits stress on IC inputs or MOSFET gates. |
| PPPM | 800 W - Peak transient power dissipation capability; enables survival of high-energy surges common in automotive load-dump or inductive switching events. |
| ID @ VWM | <1.0 µA - Reverse leakage at rated stand-off voltage; minimizes quiescent power loss and avoids false triggering in high-impedance sensing nodes. |
| TJ max | +150 °C - Maximum junction temperature rating; supports reliable operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 72 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking - symmetrical terminals suitable for AC or differential line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | Both terminals function identically; no cathode band - enables placement without orientation check in automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock - required for engine control, ADAS, and body electronics. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - eliminates baking step in high-volume SMT lines. |
| Glass-passivated junction | Enhances long-term stability of breakdown voltage and leakage performance under thermal and humidity stress - critical for 15+ year automotive service life. |
| Low clamping ratio (VC/VBR ≈ 1.47) | Minimizes overvoltage exposure during surge events - protects 3.3 V and 5 V logic interfaces without requiring additional series impedance or buffering. |
| RoHS-compliant, matte tin plating | Meets J-STD-002 solderability and JESD22-B102 intermetallic formation requirements - ensures consistent wetting and joint integrity in automated assembly. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from battery dump and ESD in vehicle ECUs. IC Role / Device Role: Bi-directional clamping element placed directly at connector entry point, shunting surge energy to ground before reaching ASIC input pins. Use Value: Prevents latch-up or gate oxide damage in 5 V tolerant sensor interface ICs while maintaining <1.0 µA leakage at 26 V system rail. |
Use Scenario: Safeguarding PLC digital input modules against induced surges from relay coil switching and motor drive noise on 24 V DC field wiring. IC Role / Device Role: Primary surge suppression device mounted adjacent to terminal block, absorbing up to 800 W transient energy without degradation. Use Value: Enables >100,000 surge cycles per IEC 61000-4-5 Level 3 testing while maintaining clamping voltage below 43 V - preserving optocoupler and microcontroller input integrity. |
| Telecom Line Driver Protection | USB 2.0 Data Line ESD Suppression |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from lightning-induced common-mode transients on twisted-pair cabling. IC Role / Device Role: Bi-directional TVS placed across differential pair (A/B) and referenced to ground, providing symmetrical clamping for ±26 V common-mode tolerance. Use Value: Maintains signal integrity up to 10 Mbps by limiting junction capacitance to <200 pF (typ.) at zero bias - verified per MIL-STD-883 method 3014. |
Use Scenario: ESD protection for USB 2.0 D+/D– lines in portable medical devices, where space-constrained layout demands minimal footprint and low capacitance. IC Role / Device Role: Low-leakage bi-directional clamp positioned between connector and PHY, meeting IEC 61000-4-2 ±15 kV contact discharge requirement. Use Value: Delivers <1.0 µA leakage at 26 V stand-off - avoids DC offset or signal attenuation in high-impedance data paths while clamping ESD pulses to <43 V. |
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-T | Same VWM (26 V), VC (42.1 V), and PPPM (800 W); identical DO-214AA package; RoHS-compliant but not AEC-Q101 qualified. | Targeted at industrial/commercial systems without automotive qualification mandates; lacks extended temperature validation and stress test reporting. | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive traceability. |
| 1.5KE27CA | Higher power (1500 W), larger DO-201AE package, higher RθJA (~50 °C/W), and higher leakage (5.0 µA at VWM). | Used in legacy through-hole designs or high-surge industrial power supplies where board space and thermal mass allow larger footprints. | Choose only if PCB layout permits axial-lead mounting and surge energy exceeds 800 W - not drop-in compatible due to package and footprint mismatch. |
Compared with SMBJ26CA-T and 1.5KE27CA, SMB8J26C-E3/52 uniquely combines AEC-Q101 qualification, MSL Level 1 reflow compatibility, and bi-directional 26 V clamping in a compact SMB footprint - making it the preferred choice for next-generation automotive and space-constrained industrial designs requiring certified reliability.
Availability
SMB8J26C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O modules, telecom line driver circuits, and USB 2.0 interface protection requiring stable component supply and full traceability.
Supply support for SMB8J26C-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, TVS devices, and optoelectronics with emphasis on high-reliability, high-power-density solutions.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for automotive and industrial surge immunity - delivering AEC-Q101-qualified, low-clamp bi-directional protection in industry-standard SMB packages.
FAQ
What is the maximum clamping voltage of SMB8J26C-E3/52 under a 10/1000 µs surge?
The SMB8J26C-E3/52 exhibits a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 19.0 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88422, ensuring predictable overvoltage limiting for downstream 3.3 V or 5 V ICs. The SMB8J26C-E3/52 maintains this clamping performance across its full operating temperature range.
Is SMB8J26C-E3/52 suitable for automotive applications?
Yes, SMB8J26C-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and infotainment systems. It undergoes rigorous stress testing - including temperature cycling, highly accelerated stress testing (HAST), and mechanical shock - and operates reliably from –55 °C to +150 °C. The SMB8J26C-E3/52 also meets MSL Level 1 for lead-free reflow, supporting modern automotive manufacturing processes without moisture sensitivity concerns.
What is the reverse leakage current of SMB8J26C-E3/52 at its stand-off voltage?
At its 26 V stand-off voltage (VWM), the SMB8J26C-E3/52 specifies a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and avoids unnecessary power drain in battery-operated systems. Leakage remains well below 5.0 µA even at elevated temperatures up to +125 °C, as validated in Vishay's thermal derating curves.
Does SMB8J26C-E3/52 have polarity markings?
No, SMB8J26C-E3/52 is a bi-directional TVS diode and carries no polarity marking - its DO-214AA (SMB) package has symmetrical terminals with identical electrical behavior in both directions. Unlike uni-directional variants (e.g., SMB10J26A), it does not feature a cathode band. This simplifies automated placement and eliminates orientation verification during SMT assembly.
What is the thermal resistance of SMB8J26C-E3/52, and how does it affect layout?
The SMB8J26C-E3/52 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 value assumes standard FR-4 PCB construction and informs minimum pad area requirements for sustained surge duty. To maintain safe junction temperatures during repeated transients, designers must ensure adequate copper pour and avoid excessive trace length between SMB8J26C-E3/52 and ground planes.
SMB8J26C-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 17.2A
- 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)
SMB8J26C-E3/52 FAQ
1.How can I place an order for SMB8J26C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26C-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 SMB8J26C-E3/52 reliable?
The price and inventory of SMB8J26C-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 SMB8J26C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J26C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26C-E3/52?
SMB8J26C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26C-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 SMB8J26C-E3/52?
For technical support, including SMB8J26C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26C-E3/52 requirements.
6.How does Aetrix verify that SMB8J26C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J26C-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 SMB8J26C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J26C-E3/52?
All SMB8J26C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26C-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 SMB8J26C-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J26C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26C-E3/52 Tags
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