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Vishay General Semiconductor - Diodes Division SMBJ26AHE3/52
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- Part No.:
- SMBJ26AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26AHE3/52.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,043
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Product details
Overview
SMBJ26AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 42.1 V maximum clamping voltage (VC) at 14.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives to protect MOSFET gate drivers from inductive switching transients.
For engineers reviewing the SMBJ26AHE3/52 datasheet, SMBJ26AHE3/52 pinout, SMBJ26AHE3/52 application, or SMBJ26AHE3/52 equivalent, key selection criteria include clamping performance under 14.3 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 26 V).
Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable operation up to TJ = 150 °C. The device meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage seen by protected circuit during full 600 W surge; limits stress on 30–36 V-rated components. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates protection against IEC 61000-4-5 Level 4 surges. |
| IPPM | 14.3 A - Peak surge current capability; determines minimum trace width and PCB copper area needed for thermal dissipation. |
| TJ max. | 150 °C - Maximum junction temperature; sets upper limit for ambient + power loss derating in enclosed enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for under-hood ECUs. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-impedance return plane; must handle 14.3 A transient without voltage rise. |
| Cathode | Reverse voltage sensing / Surge shunt node | Connected to protected line (e.g., 24 V rail); clamps to ≤42.1 V when transients exceed 28.9 V. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables single-device protection against high-energy transients (e.g., ISO 7637-2 Pulse 5a) without external series impedance. |
| AEC-Q101 qualified | Validated for automotive environments including thermal shock, humidity bias, and accelerated life testing - supports Tier-1 ECU designs. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin for sensitive gate drivers. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - simplifies SMT line integration and reduces production risk. |
| Glass passivated junction | Ensures stable VBR tolerance and <1.0 µA leakage at VWM, critical for low-power always-on sensor circuits. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC bus and gate driver inputs against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between rail and ground, responding within <1 ns to suppress >100 V spikes. Use Value: Limits voltage seen by 30 V-rated MOSFETs and gate drivers to ≤42.1 V, preventing cumulative oxide damage and latch-up. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS on power input and signal lines, leveraging AEC-Q101 qualification for automotive longevity. Use Value: Maintains system uptime by absorbing 600 W surges without degradation, meeting ISO 16750-2 requirements for 12 V systems. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection of 24–48 V telecom rectifiers against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output, coordinated with upstream MOVs and fuses. Use Value: Provides precise 26 V standoff and 42.1 V clamping to avoid false triggering while ensuring downstream DC/DC converters remain undamaged. |
Use Scenario: Protecting microcontroller reset lines and sensor interfaces in washing machines and HVAC controllers exposed to ESD and relay noise. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) unidirectional clamp on 3.3 V or 5 V logic rails, placed adjacent to IC pins. Use Value: Prevents firmware lockups and sensor data corruption by clamping ESD events to <42.1 V with sub-nanosecond response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26AHM3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free materials are mandated by OEM environmental policy. | Choose SMBJ26AHM3/52 when compliance with IPC-1752A Category A reporting or EU ELV Directive is required. |
| SMBJ26A-E3/52 | Commercial-grade (non-AEC-Q101) version; same VWM, VBR, VC, and PPPM, but not validated for automotive temperature cycling or HTRB. | Suitable for industrial or consumer use only; not recommended for automotive under-hood or chassis locations. | Select SMBJ26A-E3/52 for cost-sensitive non-automotive applications where AEC-Q101 is not contractually required. |
Compared with SMBJ26AHE3/52, SMBJ26AHM3/52 offers identical protection performance with halogen-free construction, while SMBJ26A-E3/52 provides equal clamping and power rating without automotive qualification - enabling trade-offs between environmental compliance, reliability validation, and BOM cost.
Availability
SMBJ26AHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply across multi-year production cycles.
Supply support for SMBJ26AHE3/52 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, precision, and application-specific validation.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes demand proven clamping consistency and long-term stability.
FAQ
What is the clamping voltage of SMBJ26AHE3/52 at its rated peak pulse current?
The SMBJ26AHE3/52 has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 14.3 A, measured with a 10/1000 µs waveform. This value defines the highest voltage imposed on the protected circuit during a full 600 W transient event, making SMBJ26AHE3/52 suitable for safeguarding 30–36 V-rated components such as gate drivers and DC/DC controllers.
Is SMBJ26AHE3/52 qualified for automotive applications?
Yes, SMBJ26AHE3/52 is AEC-Q101 qualified, having passed rigorous stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per ANSI/ESDA/JEDEC JS-001. This qualification confirms SMBJ26AHE3/52 for use in automotive body control modules, infotainment power supplies, and other under-hood or chassis-mounted systems requiring extended lifetime reliability.
What does the "HE3" suffix indicate in SMBJ26AHE3/52?
The "HE3" suffix in SMBJ26AHE3/52 denotes a RoHS-compliant, AEC-Q101-qualified variant with matte tin-plated leads. It distinguishes this part from commercial-grade versions (e.g., "E3") and halogen-free variants (e.g., "HM3"), confirming both environmental compliance and automotive-grade reliability validation for SMBJ26AHE3/52.
How is the polarity marked on SMBJ26AHE3/52?
SMBJ26AHE3/52 is a unidirectional TVS diode with polarity indicated by a molded cathode band on the SMB (DO-214AA) package body. During PCB layout, the banded end must be connected to the line being protected (e.g., 24 V rail), while the anode connects to ground - ensuring correct avalanche conduction during reverse overvoltage events.
What is the thermal resistance from junction to ambient for SMBJ26AHE3/52?
The typical thermal resistance from junction to ambient (RθJA) for SMBJ26AHE3/52 is 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value guides thermal derating above 25 °C ambient and informs heatsinking decisions for sustained surge duty cycles in SMBJ26AHE3/52 deployments.
SMBJ26AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ26AHE3/52 FAQ
1.How can I place an order for SMBJ26AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26AHE3/52 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 SMBJ26AHE3/52 reliable?
The price and inventory of SMBJ26AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ26AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26AHE3/52?
SMBJ26AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26AHE3/52 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 SMBJ26AHE3/52?
For technical support, including SMBJ26AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26AHE3/52 requirements.
6.How does Aetrix verify that SMBJ26AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ26AHE3/52 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 SMBJ26AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ26AHE3/52?
All SMBJ26AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26AHE3/52, 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 SMBJ26AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ26AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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