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Vishay General Semiconductor - Diodes Division SMB8J26CA-M3/5B
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- Part No.:
- SMB8J26CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CA-M3/5B.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,092
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Product details
Overview
SMB8J26CA-M3/5B 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 stand-off voltage (VWM), 42.1 V maximum clamping voltage (VC) at 19.0 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J26CA-M3/5B datasheet, SMB8J26CA-M3/5B pinout, SMB8J26CA-M3/5B application, or SMB8J26CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), and thermal resistance (RθJA = 72 °C/W) for board-level reliability under repetitive surge stress.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Rated for -55 °C to +150 °C junction temperature, it meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and its 72 °C/W junction-to-ambient thermal resistance requires minimum 5.0 mm × 5.0 mm copper pads per terminal for full 800 W rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - Maximum continuous reverse voltage before clamping initiates; defines operating margin below breakdown. |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - Confirmed voltage range where device transitions from high-impedance to low-impedance clamping state. |
| VC (Clamping Voltage) | 42.1 V at IPPM = 19.0 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 800 W - Maximum single-event surge energy dissipation capability under standardized 10/1000 µs waveform. |
| ID (Reverse Leakage) | 1.0 µA at VWM - Low leakage ensures minimal quiescent power loss and signal integrity in high-impedance circuits. |
| RθJA | 72 °C/W - Thermal resistance requiring defined PCB copper area (0.2" × 0.2") to sustain rated power without exceeding 150 °C TJ. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity across device. |
| Anode / Cathode (symmetrical) | Transient conduction path | No functional distinction; device conducts surge current in either direction once VBR is exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Halogen-free & RoHS-compliant (M3) | Meets JEDEC J-STD-201 Class 2 whisker resistance and global environmental compliance without compromising solderability. |
| Low-profile SMB package | Height ≤ 2.20 mm enables use in space-constrained modules while maintaining 800 W surge handling via optimized thermal pad layout. |
| Fast response time | Sub-nanosecond junction switching limits let-through voltage during ESD or lightning-induced transients. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning or dry-pack requirements. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor lines (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: 42.1 V clamping voltage ensures downstream op-amps and ADCs remain within absolute maximum ratings during 100 V/50 ms load-dump events. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each isolated input channel, coordinated with series current-limiting resistor and optocoupler. Use Value: 800 W peak power rating sustains multiple 1 kV/500 A surge events per IEC 61000-4-5 Level 4 without degradation. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Control Board |
Use Scenario: Secondary protection on Ethernet PHY or RS-485 transceiver lines exposed to induced lightning surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Fast-acting clamping stage following gas discharge tube (GDT) primary protection to limit let-through voltage to < 50 V. Use Value: 19.0 A IPPM and 42.1 V VC enable coordination with upstream GDT to meet GR-1089-CORE Level 3 requirements. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers from back-EMF spikes generated by brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Localized TVS across motor driver half-bridge outputs and MCU signal lines to prevent latch-up or ESD damage. Use Value: Bidirectional operation eliminates need for dual unidirectional devices, reducing BOM count and PCB footprint in cost-sensitive white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J26CA-E3/5B | Same electrical specs and SMB package; RoHS-compliant but not halogen-free (E3 vs. M3). | Lacks halogen-free certification; acceptable for commercial but not automotive or green-design programs. | Select E3 only if halogen-free requirement is waived and cost sensitivity outweighs material compliance. |
| SMAJ26CA-M3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W). | Insufficient for 800 W surge events; requires derating above 25 °C ambient or larger copper area. | Use only in space-constrained, low-energy applications where 400 W rating suffices and thermal margin permits. |
Compared with SMB8J26CA-M3/5B, the E3 variant trades halogen-free status for identical performance, while SMAJ26CA-M3 sacrifices surge capacity and thermal performance for smaller footprint - making SMB8J26CA-M3/5B optimal for AEC-Q101 automotive and high-reliability industrial designs demanding full 800 W capability.
Availability
SMB8J26CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line cards, and consumer appliance motor control boards requiring stable component supply with guaranteed long-term sourcing.
Supply support for SMB8J26CA-M3/5B 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 series targets high-energy transient suppression in automotive and industrial environments, engineered for AEC-Q101 compliance, robust thermal performance, and compatibility with automated SMT assembly.
FAQ
What is the clamping voltage of SMB8J26CA-M3/5B at its rated peak pulse current?
The SMB8J26CA-M3/5B has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current (IPPM) of 19.0 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMB8J26CA-M3/5B suitable for automotive applications?
Yes, SMB8J26CA-M3/5B is AEC-Q101 qualified and explicitly listed in Vishay's automotive ordering codes (HM3 suffix). It meets requirements for temperature cycling, mechanical shock, and humidity bias testing, and is specified for use in engine control units, body electronics, and ADAS sensor interfaces where transient immunity and long-term reliability are mandatory.
How does the M3 suffix affect SMB8J26CA-M3/5B's compliance and performance?
The M3 suffix indicates SMB8J26CA-M3/5B is halogen-free and RoHS-compliant per JEDEC J-STD-201 Class 2 whisker resistance standards. It does not alter electrical or thermal performance versus E3 variants - all parameters (VWM, VC, PPPM, RθJA) remain identical - but satisfies stricter environmental mandates in automotive and green-electronics programs.
What PCB layout is required to achieve the full 800 W rating of SMB8J26CA-M3/5B?
To sustain the full 800 W peak pulse power rating, SMB8J26CA-M3/5B must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay document 88422. Smaller pads increase thermal resistance beyond the rated 72 °C/W, causing junction temperature to exceed 150 °C and triggering premature failure during repeated surges.
Does SMB8J26CA-M3/5B have polarity markings, and how is it installed?
No - SMB8J26CA-M3/5B is a bidirectional TVS diode with symmetrical terminals and no cathode band or polarity marking. It may be installed in either orientation on the PCB, providing identical clamping behavior for positive or negative transients - simplifying layout and eliminating risk of reverse installation errors in production.
SMB8J26CA-M3/5B 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 (SMBJ)
SMB8J26CA-M3/5B FAQ
1.How can I place an order for SMB8J26CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CA-M3/5B 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-M3/5B reliable?
The price and inventory of SMB8J26CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J26CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J26CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CA-M3/5B?
SMB8J26CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CA-M3/5B 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-M3/5B?
For technical support, including SMB8J26CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CA-M3/5B requirements.
6.How does Aetrix verify that SMB8J26CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J26CA-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J26CA-M3/5B?
All SMB8J26CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CA-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for SMB8J26CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CA-M3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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