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Vishay General Semiconductor - Diodes Division SMBJ26AHM3_B/H
- Part No.:
- SMBJ26AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26AHM3_B/H.pdf
- Description:
- 600W,26V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,360
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Product details
Overview
SMBJ26AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power 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 - used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives and telecom power supplies.
For engineers reviewing the SMBJ26AHM3_B/H datasheet, SMBJ26AHM3_B/H pinout, SMBJ26AHM3_B/H application, or SMBJ26AHM3_B/H equivalent, this page delivers verified electrical parameters, AEC-Q101-qualified halogen-free construction, thermal resistance data, and real-world protection use cases - supporting ESD/surge design validation, BOM sourcing, and automotive-grade reliability assessment.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp during overvoltage events, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 100 °C/W junction-to-ambient thermal resistance requires careful PCB pad layout per Vishay's recommended 0.2" × 0.2" copper pads for rated 600 W pulse handling.
The SMBJ26AHM3_B/H is halogen-free and RoHS-compliant, bearing the HM3 suffix indicating AEC-Q101 qualification for automotive applications. Polarity is marked by a cathode band; it conducts only in reverse bias above VBR, with forward voltage ≤3.5 V at 50 A - enabling integration into DC power rail protection without forward conduction interference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail voltage. |
| VBR @ IT = 1 mA | 28.9–31.9 V - Verified breakdown range ensuring reliable triggering across temperature and unit variation. |
| VC @ IPPM = 14.3 A | 42.1 V - Clamped voltage during 10/1000 µs surge; defines worst-case stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power capability with 0.01% duty cycle; supports repetitive surge immunity in industrial environments. |
| IFSM | 100 A - Non-repetitive 8.3 ms half-sine surge rating; validates robustness against inductive switch-off spikes. |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood or enclosed power supply designs. |
| RθJA | 100 °C/W - Thermal resistance requiring defined copper pad area (0.2" × 0.2") to sustain power dissipation limits. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated terminals, MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR. |
| Anode | Reference / return path | Typically tied to system ground or low-impedance return plane; completes clamping path during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V DC rails. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive power electronics including body control modules and ADAS sensor power inputs. |
| Halogen-free & RoHS-compliant | Meets EU ELV and IPC-1752A material declarations for sustainable manufacturing and end-of-life compliance. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes let-through voltage to preserve margin between clamped level and IC absolute maximum ratings. |
| MSL Level 1 moisture sensitivity | Allows standard SMT assembly without baking; compatible with high-volume automated placement and reflow. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sense circuits against switching-induced transients in 24–48 V BLDC inverters. IC Role / Device Role / Timing Role: Shunt-clamp TVS placed across DC-link capacitor or gate driver supply rail to limit voltage overshoot during MOSFET turn-off. Use Value: Limits transient voltage to ≤42.1 V, preventing latch-up or oxide breakdown in 40 V-rated gate drivers and op-amps. |
Use Scenario: Input-stage surge suppression on AC/DC front-end rectifiers and DC/DC converter inputs in base station power units. IC Role / Device Role / Timing Role: Primary-level TVS connected between +26 V input rail and chassis ground to absorb lightning-induced surges per IEC 61000-4-5. Use Value: Withstands 14.3 A peak pulse current while clamping to 42.1 V, maintaining downstream regulator input within safe SOA. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
Use Scenario: Reverse polarity and load dump protection on LIN/CAN node power inputs in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS installed upstream of LDO regulators to clamp 12 V battery line transients up to ±100 V. Use Value: AEC-Q101 qualification ensures reliability across -40 °C to +125 °C ambient, with 100 A IFSM surviving ISO 7637-2 Pulse 5a. |
Use Scenario: ESD and EFT protection on analog output lines (e.g., 4–20 mA current loops) feeding PLC analog inputs. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector interface to divert HBM ±8 kV and IEC 61000-4-2 ±15 kV discharges. Use Value: Sub-1 ns response time prevents damage to precision DACs and op-amps; VC = 42.1 V avoids saturation of 24 V loop supply headroom. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26AHE3_B/H | Same electrical specs and SMB package, but RoHS-compliant commercial grade (E3) without halogen-free or AEC-Q101 qualification. | Lacks automotive qualification; suitable for industrial/commercial systems where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and halogen-free mandate is absent. |
| SMAJ26A-HF | Lower 400 W PPPM, SMA (DO-214AC) package (smaller footprint, higher RθJA = 140 °C/W), same VWM/VC specs. | Reduced surge handling; limited to lower-energy transients or space-constrained layouts where thermal derating is acceptable. | Choose only if board space is critical and surge threat level is ≤IEC 61000-4-5 Level 2 (1 kV/2 Ω). |
Compared with SMBJ26AHM3_B/H, the E3 variant trades AEC-Q101 and halogen-free compliance for lower cost in non-automotive settings, while the SMAJ26A-HF sacrifices 33 % pulse power and thermal performance for smaller size - making SMBJ26AHM3_B/H the optimal choice for automotive-qualified, high-energy industrial surge protection.
Availability
SMBJ26AHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-qualified sourcing.
Supply support for SMBJ26AHM3_B/H 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, power efficiency, and automotive-grade qualification.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where high pulse power, low clamping, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ26AHM3_B/H at its rated peak pulse current?
The SMBJ26AHM3_B/H has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 14.3 A, measured using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88392. The SMBJ26AHM3_B/H maintains this clamping performance across its full operating temperature range.
Is SMBJ26AHM3_B/H suitable for automotive applications?
Yes, SMBJ26AHM3_B/H is AEC-Q101 qualified, as indicated by the "HM3" suffix, and is specifically designed for automotive use cases including body control modules, infotainment power rails, and ADAS sensor interfaces. Its construction meets halogen-free and RoHS requirements, and it operates reliably from -55 °C to +150 °C junction temperature. The SMBJ26AHM3_B/H has been validated for load dump (ISO 7637-2 Pulse 5a) and ESD (ISO 10605) immunity in vehicle subsystems.
What does the "_B/H" suffix mean in SMBJ26AHM3_B/H?
The "_B/H" suffix in SMBJ26AHM3_B/H denotes packaging configuration: "B" indicates tape-and-reel format per EIA-481 standards, and "H" specifies a 7-inch diameter reel containing 750 units. This ordering code aligns with Vishay's preferred package code "H" in their ordering information table (page 3 of datasheet 88392). The "HM3" portion confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction - distinct from commercial-grade "E3" or non-qualified variants.
How does SMBJ26AHM3_B/H compare to bidirectional TVS diodes like SMBJ26CA?
SMBJ26AHM3_B/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., +26 V rail to ground), offering lower leakage and tighter VBR tolerance than bidirectional types. In contrast, SMBJ26CA protects AC or polarity-agnostic lines but exhibits higher reverse leakage and symmetric clamping in both directions. The SMBJ26AHM3_B/H's cathode band marks polarity, whereas SMBJ26CA has no marking - making SMBJ26AHM3_B/H preferable for regulated DC power rails with known ground reference.
What PCB layout guidance applies to SMBJ26AHM3_B/H for optimal thermal performance?
Vishay specifies that SMBJ26AHM3_B/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 600 W peak pulse power and 100 °C/W RθJA. Smaller pads cause thermal derating - e.g., at 75 °C ambient, power capability drops ~30 %. The SMBJ26AHM3_B/H datasheet (Fig. 2) provides exact derating curves. Avoid thermal relief spokes on pads, and ensure solid inner-layer copper pours connected via multiple vias to enhance heat spreading.
SMBJ26AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ26AHM3_B/H FAQ
1.How can I place an order for SMBJ26AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26AHM3_B/H 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 SMBJ26AHM3_B/H reliable?
The price and inventory of SMBJ26AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ26AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26AHM3_B/H?
SMBJ26AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26AHM3_B/H 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 SMBJ26AHM3_B/H?
For technical support, including SMBJ26AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ26AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ26AHM3_B/H 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 SMBJ26AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ26AHM3_B/H?
All SMBJ26AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26AHM3_B/H, 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 SMBJ26AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ26AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26AHM3_B/H Tags
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