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Vishay General Semiconductor - Diodes Division SMB8J26CAHE3_A/I
- Part No.:
- SMB8J26CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CAHE3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,208
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Product details
Overview
SMB8J26CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 800 W peak pulse power (10/1000 μs), 26 V stand-off voltage (VWM), and 42.1 V maximum clamping voltage at 19.0 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, CAN transceivers, and power supply rails against ESD and load dump.
For engineers reviewing the SMB8J26CAHE3_A/I datasheet, SMB8J26CAHE3_A/I pinout, SMB8J26CAHE3_A/I application, or SMB8J26CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 26 V working voltage tolerance, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its breakdown voltage (VBR = 28.9–31.9 V at 1 mA). Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable clamping performance across -55 °C to +150 °C junction temperature range.
The device uses a symmetric bidirectional structure with no polarity marking, enabling protection of AC-coupled or differential signal paths without orientation constraints. Its low incremental surge resistance and 72 °C/W junction-to-ambient thermal resistance support reliable operation under repeated 10/1000 μs surges when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for 24 V automotive systems. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed breakdown threshold range; ensures consistent turn-on across production lot and temperature. |
| VC @ IPPM | 42.1 V at 19.0 A - Clamped voltage during 800 W surge; limits downstream IC stress below 45 V absolute maximum ratings. |
| PPPM | 800 W (10/1000 μs) - Peak surge energy handling capacity; meets ISO 7637-2 Pulse 1 & 2a requirements for 12 V vehicle networks. |
| IFSM | Not applicable - Bidirectional device has no forward surge rating; only unidirectional variants specify 100 A 8.3 ms half-sine rating. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with minimal derating. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; supports efficient heat transfer to PCB copper when soldered per JEDEC MO-294 outline. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional, unmarked case (no cathode band). Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Functions as cathode during positive transients and anode during negative transients; symmetrical conduction enables AC line protection without polarity concern. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode terminal; device has no functional polarity - both terminals are interchangeable in circuit layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, ADAS, and body electronics. |
| Glass-passivated junction | Eliminates moisture ingress and intermetallic migration risks, ensuring long-term leakage stability (<1.0 μA) over 15-year service life. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking; supports high-volume automotive PCB assembly. |
| Low RθJL = 20 °C/W | Enables >85% of surge energy to dissipate into PCB copper rather than junction heating, improving single-pulse and repetitive surge survivability. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation in battery management or infotainment enclosures under fault conditions. |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting analog output pins of pressure, temperature, and position sensors in engine bay modules exposed to ISO 7637-2 Pulse 5a (load dump). IC Role / Device Role / Timing Role: Shunt clamping element placed between sensor signal line and ground, activated within <1 ns upon voltage excursion beyond 26 V. Use Value: Limits sensor IC input voltage to ≤42.1 V during 800 W surges, preventing latch-up or gate oxide rupture in precision amplifiers and ADC front-ends. | Use Scenario: Safeguarding CAN-H and CAN-L differential pair inputs in gateway ECUs subjected to ESD (IEC 61000-4-2 ±8 kV contact) and coupled transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp connected line-to-line and line-to-ground, absorbing common-mode and differential-mode energy simultaneously. Use Value: Maintains CAN signal integrity by clamping differential spikes to <84.2 V while preserving DC common-mode range (±12 V) and bit timing accuracy. |
| Industrial PLC I/O Protection | DC Power Rail Clamp |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Parallel-connected TVS across input optocoupler terminals, diverting surge current away from internal LED and phototransistor. Use Value: Extends optocoupler lifetime by limiting reverse voltage across LED to ≤42.1 V during 100 A inductive spikes, avoiding premature degradation. | Use Scenario: Clamping 24 V supply rail in telematics units against reverse battery connection and jump-start transients per ISO 16750-2. IC Role / Device Role / Timing Role: Low-inductance shunt device placed directly at power entry point, with Kelvin connection to minimize voltage overshoot during fast-rising events. Use Value: Holds rail voltage below 45 V during 100 ms load dump events, preventing brownout reset or regulator shutdown in microcontroller subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J26CAHM3_A/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free compliance is mandated by OEM material declarations. | Choose SMB8J26CAHM3_A/I when full halogen-free certification (e.g., IEC 61249-2-21) is contractually required. |
| SMC8J26CAHE3_A/I | Same electrical parameters but in larger SMC (DO-214AB) package; 1500 W PPPM, RθJL = 15 °C/W. | Higher surge rating and better thermal performance, but requires larger PCB footprint and may not fit space-constrained automotive modules. | Choose SMC8J26CAHE3_A/I only when system-level testing confirms need for >800 W surge handling or extended thermal margin. |
Compared with SMB8J26CAHE3_A/I, the HM3 variant offers identical protection performance with halogen-free construction, while the SMC8J26CAHE3_A/I delivers higher surge robustness at the cost of board area - neither is pin-compatible due to differing package outlines, requiring layout revision.
Availability
SMB8J26CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus nodes, industrial PLC I/O modules, and 24 V DC power rail protection requiring stable component supply across multi-year production cycles.
Supply support for SMB8J26CAHE3_A/I 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMB8JxxCAHE3 series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments where failure modes must be rigorously controlled.
FAQ
What is the clamping voltage of SMB8J26CAHE3_A/I at its rated peak pulse current?
The SMB8J26CAHE3_A/I has a maximum clamping voltage (VC) of 42.1 V at its specified peak pulse current (IPPM) of 19.0 A, measured under the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range (-55 °C to +150 °C) and ensures downstream circuitry remains within safe voltage limits during surge events. The SMB8J26CAHE3_A/I achieves this clamping performance using a symmetric bidirectional silicon avalanche structure with glass passivation.
Is SMB8J26CAHE3_A/I suitable for protecting CAN FD interfaces?
Yes, SMB8J26CAHE3_A/I is suitable for CAN FD interface protection due to its bidirectional architecture, 26 V stand-off voltage matching typical 24 V CAN physical layer supplies, and 42.1 V clamping level that stays well below the 58 V absolute maximum rating of most CAN FD transceivers. Its sub-nanosecond response time preserves signal edge integrity up to 5 Mbps, and AEC-Q101 qualification ensures robustness against automotive ESD and burst noise. The SMB8J26CAHE3_A/I must be placed with minimal trace inductance near the connector for optimal effectiveness.
Does SMB8J26CAHE3_A/I have polarity markings on the package?
No, SMB8J26CAHE3_A/I does not have polarity markings on the SMB (DO-214AA) package because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMB8J26A), which feature a cathode band, the SMB8J26CAHE3_A/I uses a symmetrical junction structure where both terminals perform identically under positive or negative transients. This eliminates orientation concerns during automated placement and simplifies PCB layout for differential or AC-coupled signal paths.
What is the maximum operating temperature for SMB8J26CAHE3_A/I?
The SMB8J26CAHE3_A/I has a maximum operating junction temperature (TJ) of +150 °C and a storage temperature range of -55 °C to +150 °C. This rating is validated per AEC-Q101 stress tests and allows deployment in under-hood automotive locations such as engine control units, transmission control modules, and battery management systems. Derating of peak pulse power begins above 25 °C ambient, following the curve in Figure 2 of Vishay document 88422; at 125 °C ambient, SMB8J26CAHE3_A/I retains ~65% of its 800 W rating.
How does SMB8J26CAHE3_A/I differ from SMB10J26AHE3_A/I?
The SMB8J26CAHE3_A/I is a bidirectional 800 W TVS with 26 V stand-off voltage, while SMB10J26AHE3_A/I is a unidirectional 1000 W variant with identical VWM and VC but adds a defined cathode terminal and 100 A 8.3 ms forward surge rating. The "C" suffix denotes bidirectionality; the "10" prefix indicates higher surge rating. SMB8J26CAHE3_A/I is preferred for AC signal lines or differential buses like CAN, whereas SMB10J26AHE3_A/I suits DC power rails where unidirectional clamping suffices. Both share SMB package and AEC-Q101 qualification.
SMB8J26CAHE3_A/I 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:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 19A
- 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)
SMB8J26CAHE3_A/I FAQ
1.How can I place an order for SMB8J26CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CAHE3_A/I 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 SMB8J26CAHE3_A/I reliable?
The price and inventory of SMB8J26CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J26CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J26CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CAHE3_A/I?
SMB8J26CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CAHE3_A/I 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 SMB8J26CAHE3_A/I?
For technical support, including SMB8J26CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J26CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J26CAHE3_A/I 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 SMB8J26CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J26CAHE3_A/I?
All SMB8J26CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CAHE3_A/I, 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 SMB8J26CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMB8J26CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CAHE3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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