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Vishay General Semiconductor - Diodes Division SMBJ26A-M3/52
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- Part No.:
- SMBJ26A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26A-M3/52.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,631
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Product details
Overview
SMBJ26A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1.0 mA test current, and clamps transients to ≤42.1 V at 14.3 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ26A-M3/52 datasheet, SMBJ26A-M3/52 pinout, SMBJ26A-M3/52 application, or SMBJ26A-M3/52 equivalent, key selection criteria include its 600 W peak pulse power rating, 1.0 µA max reverse leakage at VWM, halogen-free RoHS-compliant construction (M3 suffix), and AEC-Q101 qualification readiness via HM3 variants - critical for high-reliability board-level surge immunity design.
Technical Context
This TVS diode operates as a clamping device in unidirectional configuration, with cathode-banded polarity marking. Its silicon junction is glass passivated for stable avalanche performance and low incremental surge resistance, enabling sub-nanosecond response to ESD and lightning-induced transients.
The device complies with ANSI/IEEE C62.35 surge standards and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C reflow peak. Thermal resistance is 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, supporting continuous 5.0 W power dissipation at 50 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit DC bias. |
| VBR min/max | 28.9 V / 31.9 V at IT = 1.0 mA - guaranteed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤42.1 V at 14.3 A (10/1000 µs) - clamping voltage defines worst-case stress imposed on downstream ICs during surge. |
| PPPM | 600 W - peak pulse power handling capacity; determines survivability against IEC 61000-4-5 4 kV surge tests. |
| IPPM | 14.3 A - maximum non-repetitive surge current; used with PCB trace width and fuse coordination. |
| Leakage ID | ≤1.0 µA at 26 V - ultra-low reverse leakage preserves battery life and avoids false triggering in low-power sensor nodes. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive or industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads solderable per J-STD-002. Cathode indicated by band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail or CAN_H); conducts avalanche current when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV) surge immunity without derating at TA ≤ 70 °C. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free assembly without popcorn cracking or delamination risk. |
| Halogen-free & RoHS-compliant (M3) | Fulfills EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot across protected ICs, reducing need for additional series impedance or buffering. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC power input against load dump and inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and chassis ground, clamping transients within 1 ns to prevent MOSFET gate oxide failure. Use Value: Withstands 14.3 A surge at ≤42.1 V clamp, limiting stress on downstream DC-DC converters and microcontrollers to safe levels per ISO 7637-2 Pulse 5a. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to battery transients and ESD in door modules and seat controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V sensor VCC lines, activated only during >28.9 V overvoltage events to avoid interference with normal 12 V operation. Use Value: 1.0 µA leakage at 26 V prevents measurable current draw in sleep mode; 150 °C TJ rating supports under-dash mounting near HVAC ducts. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection for PoE-powered remote units subjected to induced surges from nearby AC wiring and lightning coupling. IC Role / Device Role / Timing Role: Primary clamping device on 48 V DC input, coordinated with upstream fuses and secondary filtering to meet IEC 61000-4-5 Class B immunity. Use Value: 600 W PPPM allows single-device coverage of 4 kV open-circuit surge testing without parallel staging or thermal derating penalties. |
Use Scenario: Overvoltage guard on microcontroller I/O pins connected to front-panel buttons and display backlight drivers in washing machines and ovens. IC Role / Device Role / Timing Role: Localized TVS on each 5 V or 3.3 V I/O line, placed adjacent to connector entry points to intercept fast ESD pulses before reaching MCU GPIOs. Use Value: Sub-nanosecond response time and low capacitance (<100 pF typical) prevent signal integrity degradation on 10 kHz PWM backlight control lines. |
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-M3/52 | Bidirectional variant; symmetric VBR (28.9–31.9 V) in both polarities; no polarity marking. | Required for AC-coupled or floating signal lines (e.g., RS-485, audio inputs) where reverse polarity transients occur. | Select SMBJ26CA-M3/52 only when protecting bidirectional signals; SMBJ26A-M3/52 is optimal for DC rails with defined ground reference. |
| SMAJ26A-E3/52 | Lower PPPM (400 W), larger VC (49.9 V), same VWM/VBR; SMA (DO-214AC) package with smaller footprint but higher RθJA (140 °C/W). | Suitable for space-constrained consumer boards where 400 W surge margin suffices and thermal mass is limited. | Choose SMAJ26A-E3/52 only if board area is critical and surge test level is ≤2 kV; SMBJ26A-M3/52 provides 50 % higher power headroom and better thermal performance. |
Compared with SMBJ26CA-M3/52 and SMAJ26A-E3/52, SMBJ26A-M3/52 delivers superior 600 W surge handling and lower thermal resistance in a halogen-free package - making it the preferred choice for industrial and automotive 24 V system protection where reliability and margin are prioritized over minimal footprint.
Availability
SMBJ26A-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ26A-M3/52 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where sustained surge immunity and AEC-Q101 readiness are mandatory design requirements.
FAQ
What is the maximum clamping voltage of SMBJ26A-M3/52 under a 10/1000 µs surge?
The SMBJ26A-M3/52 clamps to a maximum of 42.1 V when subjected to its rated peak pulse current of 14.3 A under the standardized 10/1000 µs waveform. This value is measured at the device terminals and represents the worst-case voltage seen by downstream circuitry during surge events - critical for ensuring protected ICs remain within absolute maximum ratings.
Does SMBJ26A-M3/52 meet automotive qualification standards?
SMBJ26A-M3/52 itself is commercial-grade and halogen-free RoHS-compliant, but not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ26A-HM3/52 variant - same electrical specs and SMB package - which is fully AEC-Q101 qualified for automotive applications. Always verify ordering code suffixes for qualification status.
How does the M3 suffix affect the environmental compliance of SMBJ26A-M3/52?
The M3 suffix on SMBJ26A-M3/52 indicates halogen-free, RoHS-compliant construction per EU Directive 2011/65/EU and IPC-1752A. It confirms absence of brominated flame retardants (BFRs), chlorinated flame retardants (CFRs), and antimony trioxide - meeting strict green manufacturing requirements without compromising surge performance or thermal reliability.
Can SMBJ26A-M3/52 be used in bidirectional signal protection?
No - SMBJ26A-M3/52 is strictly unidirectional and must be installed with correct polarity (cathode toward the protected line). For bidirectional signal lines such as RS-485, USB, or audio, use the SMBJ26CA-M3/52 variant instead, which provides symmetrical clamping in both directions and has no polarity marking.
What is the thermal resistance of SMBJ26A-M3/52, and how does it impact layout?
SMBJ26A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surges, ensure minimum pad area compliance and avoid excessive trace length or isolation - especially in enclosed industrial enclosures above 70 °C ambient.
SMBJ26A-M3/52 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 14.3A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ26A-M3/52 FAQ
1.How can I place an order for SMBJ26A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26A-M3/52 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 SMBJ26A-M3/52 reliable?
The price and inventory of SMBJ26A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ26A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26A-M3/52?
SMBJ26A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26A-M3/52 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 SMBJ26A-M3/52?
For technical support, including SMBJ26A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26A-M3/52 requirements.
6.How does Aetrix verify that SMBJ26A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ26A-M3/52 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 SMBJ26A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ26A-M3/52?
All SMBJ26A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26A-M3/52, 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 SMBJ26A-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ26A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26A-M3/52 Tags
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