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Vishay General Semiconductor - Diodes Division SMB8J26CHE3/5B
- Part No.:
- SMB8J26CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CHE3/5B.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,825
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Product details
Overview
SMB8J26CHE3/5B 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 maximum clamping voltage at 19.0 A peak pulse current, and 800 W peak pulse power rating 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 SMB8J26CHE3/5B datasheet, SMB8J26CHE3/5B pinout, SMB8J26CHE3/5B application, or SMB8J26CHE3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, RoHS-compliant material categorization, and real-world clamping performance under standardized surge conditions.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection without polarity dependency in AC-coupled or differential signal paths. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at 26 V), while the 72 °C/W junction-to-ambient thermal resistance supports reliable operation up to 150 °C junction temperature.
The device meets AEC-Q101 stress test requirements for automotive applications and is rated for MSL level 1 per J-STD-020 with 260 °C lead-free reflow compatibility. Its 1.0 mm minimum pad layout and matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1.0 mA - Measured voltage range where device transitions from high-impedance to low-impedance conduction; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 42.1 V at IPPM = 19.0 A - Maximum voltage seen by protected circuit during 10/1000 µs surge; determines downstream component voltage stress. |
| PPPM (Peak Pulse Power) | 800 W - Surge energy handling capability under standardized 10/1000 µs waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID (Reverse Leakage) | ≤1.0 µA at 26 V - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | 150 °C - Maximum allowable junction temperature; supports 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 PCB thermal design for sustained surge duty cycles. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking. Cathode band absent - symmetrical terminal arrangement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in either polarity; no dedicated anode/cathode - simplifies layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensor interfaces, and infotainment power rails. |
| Low incremental surge resistance | Enables tighter clamping (42.1 V at 19.0 A) versus competing 26 V TVS devices - reduces overvoltage stress on downstream ICs like CAN transceivers or ADC front-ends. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns - eliminates bake requirements pre-reflow. |
| Glass passivated chip junction | Ensures stable VBR tolerance (±5% typical) and long-term parameter stability under thermal cycling and humidity exposure - critical for industrial field-deployed equipment. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets fire-safety requirements for enclosed power supplies and telecom infrastructure equipment. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤42.1 V during 19.0 A surges, preventing ADC saturation and latch-up in 3.3 V or 5 V microcontrollers. |
Use Scenario: Guarding RS-485 transceiver bus pins (A/B) against ESD events and induced surges in factory automation networks. IC Role / Device Role / Timing Role: Primary line-side TVS connected directly to transceiver differential pair, upstream of common-mode chokes. Use Value: Clamps fast transients within nanoseconds while maintaining <1.0 µA leakage at 26 V - avoids false triggering and signal distortion on 250 kbps+ links. |
| Telecom Line Driver Protection | Consumer USB Port ESD Suppression |
Use Scenario: Safeguarding xDSL or POTS line drivers against lightning-induced surges entering via telephone wiring. IC Role / Device Role / Timing Role: High-power bi-directional TVS placed at line interface, coordinated with gas discharge tube (GDT) primary protection. Use Value: Handles 800 W peak pulse energy (10/1000 µs), enabling coordination with GDTs to meet ITU-T K.20/K.44 immunity requirements. |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Fast-response TVS located adjacent to USB connector, downstream of series impedance. Use Value: Sub-1 ns response time and 42.1 V clamping prevent damage to USB PHY transceivers rated for ±15 kV HBM ESD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA-E3/5B | Same VWM (26 V), same DO-214AA package, but rated for 600 W PPPM (vs. 800 W) and higher clamping voltage (44.0 V at 15.0 A). | Limited to lower-energy surge environments (e.g., IEC 61000-4-2 only); not recommended for IEC 61000-4-5 Level 3+ or automotive load dump. | Select SMB8J26CHE3/5B when 800 W surge handling and tighter clamping are required; SMBJ26CA-E3/5B suits cost-sensitive consumer designs with lower threat profiles. |
| SMCJ26CAHE3/5B | Same VWM and AEC-Q101 qualification, but larger DO-214AB (SMC) package with 1500 W PPPM and lower clamping (42.1 V at 35.5 A). | Requires larger PCB footprint and higher thermal mass; preferred for high-reliability power rail protection where space permits. | Choose SMB8J26CHE3/5B for space-constrained layouts needing 800 W in SMB; select SMCJ26CAHE3/5B when higher surge margin and lower RθJA (35 °C/W) are prioritized. |
Compared with SMBJ26CA-E3/5B and SMCJ26CAHE3/5B, SMB8J26CHE3/5B delivers optimal balance of 800 W surge capacity, 42.1 V clamping, and compact DO-214AA footprint - making it ideal for automotive body electronics and industrial I/O modules where board area and surge robustness are both constrained.
Availability
SMB8J26CHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line driver protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMB8J26CHE3/5B 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 SMB8JxxCA family targets high-energy transient suppression in automotive, industrial, and telecom systems where bi-directional clamping, AEC-Q101 qualification, and consistent 10/1000 µs surge performance are mandatory.
FAQ
What is the clamping voltage of SMB8J26CHE3/5B at its rated peak pulse current?
The SMB8J26CHE3/5B has a maximum clamping voltage (VC) of 42.1 V at its specified peak pulse current (IPPM) of 19.0 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMB8J26CHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J26CHE3/5B suitable for automotive applications?
Yes, SMB8J26CHE3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validated performance under temperature cycling and HTRB testing confirm suitability for engine control units, ADAS camera modules, and body electronics. The SMB8J26CHE3/5B HE3 suffix denotes AEC-Q101 qualification per Vishay's ordering nomenclature.
What does the "HE3" suffix mean in SMB8J26CHE3/5B?
The "HE3" suffix in SMB8J26CHE3/5B indicates RoHS-compliant construction with AEC-Q101 qualification (H = AEC-Q101, E3 = RoHS-compliant commercial grade). This distinguishes it from base "E3" variants lacking automotive qualification. The "5B" denotes 13-inch tape-and-reel packaging with 3200 units per reel - confirmed in Vishay's ordering information table on page 3 of document 88422.
How does SMB8J26CHE3/5B differ from uni-directional SMB10J26A variants?
SMB8J26CHE3/5B is bi-directional with symmetrical breakdown in both polarities (VBR = 28.9–31.9 V), while SMB10J26A is uni-directional with cathode marking and forward conduction capability. The SMB8J26CHE3/5B offers 800 W PPPM and 42.1 V clamping at 19.0 A, whereas SMB10J26A provides 1000 W PPPM and 42.1 V clamping at 23.8 A. The SMB8J26CHE3/5B is selected for AC-coupled or differential signal protection; SMB10J26A suits DC power rail or single-polarity signal lines.
What is the thermal resistance of SMB8J26CHE3/5B, and how does it affect PCB layout?
The SMB8J26CHE3/5B 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 value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA. For sustained surge duty or high ambient temperatures, PCB layout must allocate sufficient copper area to maintain TJ ≤ 150 °C - especially critical in automotive and industrial applications where the SMB8J26CHE3/5B operates near its thermal limits.
SMB8J26CHE3/5B 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):
- 17.2A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J26CHE3/5B FAQ
1.How can I place an order for SMB8J26CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CHE3/5B 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 SMB8J26CHE3/5B reliable?
The price and inventory of SMB8J26CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J26CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J26CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CHE3/5B?
SMB8J26CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CHE3/5B 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 SMB8J26CHE3/5B?
For technical support, including SMB8J26CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CHE3/5B requirements.
6.How does Aetrix verify that SMB8J26CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J26CHE3/5B 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 SMB8J26CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J26CHE3/5B?
All SMB8J26CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CHE3/5B, 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 SMB8J26CHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J26CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CHE3/5B Tags
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