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Vishay General Semiconductor - Diodes Division SMB8J26CA-E3/52
- Part No.:
- SMB8J26CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CA-E3/52.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J26CA-E3/52 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-E3/52 datasheet, SMB8J26CA-E3/52 pinout, SMB8J26CA-E3/52 application, or SMB8J26CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 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 uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional architecture enables symmetric clamping for AC-coupled or floating lines without polarity sensitivity.
Rated for -55 °C to +150 °C operating junction temperature and qualified to AEC-Q101, SMB8J26CA-E3/52 supports automotive-grade reliability under repetitive surge stress. The device meets MSL level 1 (260 °C reflow peak) and UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR min / max | 28.9 V / 31.9 V at 1.0 mA - breakdown voltage range ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 42.1 V at 19.0 A - clamping voltage limits downstream IC stress during 800 W transient events (10/1000 μs). |
| PPPM | 800 W - peak pulse power rating determines survivability against lightning-induced surges per IEC 61000-4-5. |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| RθJL | 20 °C/W - low junction-to-lead thermal resistance enables efficient heat transfer to PCB copper, sustaining repeated surges. |
| AEC-Q101 | Qualified - validated for automotive applications including engine control, ADAS sensors, and body electronics. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical dual-terminal construction with matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied. |
| Case (body) | Thermal and mechanical interface | Exposed metal slug transfers heat directly to PCB copper pads (0.2" × 0.2"); no internal ground connection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled, differential, or floating signal lines (e.g., CAN FD, LIN, RS-485) without polarity constraints. |
| AEC-Q101 qualification | Validated for automotive underhood and cabin environments, including temperature cycling, humidity, and mechanical shock. |
| Low RθJL (20 °C/W) | Supports >1000 surge cycles at rated power when mounted on 5.0 mm × 5.0 mm copper pads - critical for industrial fieldbus longevity. |
| MSL Level 1 | Compatible with standard lead-free reflow profiles up to 260 °C peak, eliminating moisture sensitivity handling requirements. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh industrial enclosures. |
Applications
| Automotive Sensor Protection | Industrial Fieldbus Interface |
|---|---|
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: Bidirectional TVS clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transients to ≤42.1 V, preventing ADC saturation and latch-up while maintaining <1.0 μA leakage at 26 V system bias. |
Use Scenario: Shielding RS-485 transceiver I/O pins in programmable logic controllers subjected to EFT bursts and surge coupling from adjacent motor drives. IC Role / Device Role / Timing Role: Primary line-level surge suppression device installed at connector entry point, upstream of transceiver. Use Value: Absorbs 800 W surges (10/1000 μs) without degradation, preserving signal integrity over 10+ years of factory-floor operation. |
| Consumer Power Adapter Input | Telecom DC Power Feed |
Use Scenario: Secondary-side overvoltage protection on 24 V DC output rails of wall-mounted adapters used in smart home hubs. IC Role / Device Role / Timing Role: Standoff-clamp TVS parallel to output capacitor, triggered only during fault conditions. Use Value: Maintains 26 V nominal operation with zero standby loss; clamps to 42.1 V within <1 ns to protect downstream PMICs and SoCs. |
Use Scenario: Surge protection on -48 V DC telecom power feeds entering remote radio units (RRUs), where lightning-induced common-mode transients exceed 1 kV. IC Role / Device Role / Timing Role: Bidirectional clamp across power rail and chassis ground to shunt differential and common-mode energy. Use Value: Withstands 19.0 A peak surge current while holding clamping voltage below -42.1 V, preventing MOSFET gate oxide failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA-E3/52 | Same VWM (26 V), VC (42.1 V), and SMB package; differs in PPPM (600 W vs. 800 W) and IPPM (14.3 A vs. 19.0 A). | Limited to lower-energy transients (IEC 61000-4-5 Level 3); unsuitable for automotive load-dump scenarios requiring 800 W. | Select SMB8J26CA-E3/52 when protecting 24 V systems subject to high-energy surges (e.g., ISO 7637-2 Pulse 5a). |
| SMCJ26CA-E3/52 | Same electrical specs but in larger SMC (DO-214AB) package; RθJL = 15 °C/W and PPPM = 1500 W. | Requires larger PCB footprint and higher assembly cost; preferred only when thermal budget demands >800 W headroom. | Choose SMB8J26CA-E3/52 for space-constrained designs where 800 W PPPM and SMB footprint are optimal. |
Compared with SMBJ26CA-E3/52 and SMCJ26CA-E3/52, SMB8J26CA-E3/52 delivers superior power density (800 W in SMB), AEC-Q101 qualification not found in SMBJ series, and smaller board area than SMCJ - making it the optimal choice for automotive and compact industrial modules.
Availability
SMB8J26CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial fieldbus nodes, consumer power adapter outputs, and telecom DC feed protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMB8J26CA-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, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMB8JxxCA series targets high-reliability transient suppression in space-constrained, thermally demanding environments - specifically engineered for AEC-Q101 compliance and robust surge handling in automotive and industrial control systems.
FAQ
What is the clamping voltage of SMB8J26CA-E3/52 at its rated peak pulse current?
The SMB8J26CA-E3/52 has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current (IPPM) of 19.0 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components remain within safe voltage limits during surge events. The SMB8J26CA-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J26CA-E3/52 suitable for automotive applications?
Yes, SMB8J26CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including underhood and cabin environments. Its construction - glass-passivated junction, MSL Level 1 rating, and operation up to +150 °C junction temperature - meets stringent automotive reliability requirements. The SMB8J26CA-E3/52 is commonly deployed in engine control units, ADAS camera modules, and body control modules for transient protection.
How does SMB8J26CA-E3/52 differ from unidirectional variants like SMB10J26A-E3/52?
The SMB8J26CA-E3/52 is bidirectional with symmetrical clamping for AC or floating lines, whereas SMB10J26A-E3/52 is unidirectional and requires correct polarity orientation. SMB8J26CA-E3/52 has no cathode band marking, while SMB10J26A-E3/52 uses a color band to denote the cathode. Electrically, SMB8J26CA-E3/52 offers 800 W PPPM and 19.0 A IPPM, versus 1000 W and 23.8 A for SMB10J26A-E3/52 - reflecting trade-offs between directionality and power rating.
What PCB pad layout is recommended for optimal thermal performance of SMB8J26CA-E3/52?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of SMB8J26CA-E3/52 to achieve rated power dissipation and thermal resistance (RθJL = 20 °C/W). The SMB8J26CA-E3/52 datasheet Figure 2 confirms derating curves assume this pad size; reducing pad area increases junction temperature and reduces surge endurance. Thermal vias beneath the pads further improve heat spreading in multilayer boards.
Does SMB8J26CA-E3/52 require external circuitry such as series impedance for proper operation?
No, SMB8J26CA-E3/52 operates as a standalone shunt protector and requires no external components to function. It is connected in parallel with the protected line and ground (or return path). However, for optimal transient response in high-speed data lines, a small series resistor or ferrite bead may be added upstream to limit di/dt - but this is application-specific and not required for basic overvoltage clamping. The SMB8J26CA-E3/52 performs reliably in direct-connect configurations per its published test conditions.
SMB8J26CA-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:
- 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-E3/52 FAQ
1.How can I place an order for SMB8J26CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CA-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 SMB8J26CA-E3/52 reliable?
The price and inventory of SMB8J26CA-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 SMB8J26CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J26CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CA-E3/52?
SMB8J26CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CA-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 SMB8J26CA-E3/52?
For technical support, including SMB8J26CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CA-E3/52 requirements.
6.How does Aetrix verify that SMB8J26CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J26CA-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 SMB8J26CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J26CA-E3/52?
All SMB8J26CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CA-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 SMB8J26CA-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J26CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CA-E3/52 Tags
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