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Vishay General Semiconductor - Diodes Division SMBJ26AHM3_A/I
- Part No.:
- SMBJ26AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26AHM3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ26AHM3_A/I 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 sensitive electronics. It features a 26 V standoff 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 on power rails and signal lines of industrial motor drives.
For engineers reviewing the SMBJ26AHM3_A/I datasheet, SMBJ26AHM3_A/I pinout, SMBJ26AHM3_A/I application, or SMBJ26AHM3_A/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world clamping performance under surge conditions - critical for automotive-grade ESD and load-dump protection design validation.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, 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 (RθJA) and 20 °C/W junction-to-lead (RθJL) support reliable operation up to 150 °C junction temperature under repetitive surge duty cycles ≤ 0.01 %.
The SMBJ26AHM3_A/I meets J-STD-020 MSL Level 1 moisture sensitivity, withstands 100 A non-repetitive forward surge (8.3 ms half-sine), and exhibits 0.097 %/°C temperature coefficient of VBR. Its 1.0 µA max reverse leakage at VWM ensures minimal standby power loss in always-on circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed breakdown threshold window; ensures predictable turn-on across manufacturing lot. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage during 10/1000 µs surge; directly limits stress on downstream ICs like microcontrollers or gate drivers. |
| PPPM | 600 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth). |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms); supports load-dump immunity in 12 V automotive systems. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood environments without thermal shutdown. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded epoxy case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail; conducts during reverse-biased surge events when cathode is at higher potential. |
| Cathode | Clamping reference terminal | Banded end; tied to protected line (e.g., 24 V supply or CAN_H); initiates avalanche breakdown when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics; supports PPAP documentation requirements. |
| Halogen-free & RoHS-compliant | HM3 suffix denotes full compliance with JEDEC J-STD-609A Class 1 halogen-free standard and EU RoHS Directive 2011/65/EU. |
| 600 W peak pulse power | Withstands 10/1000 µs transients up to 14.3 A without degradation - sufficient for ISO 7637-2 Pulse 5a (load dump) testing. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60 % RH; eliminates bake-out requirement prior to reflow soldering. |
| Low clamping ratio (VC/VBR) | 1.47 (42.1 V / 28.9 V) - Minimizes overvoltage overshoot during fast transients, reducing risk of MOSFET gate oxide failure. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC input stage against inductive kickback from relay coils and solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and chassis ground to clamp transients <100 ns after onset. Use Value: Limits voltage excursion to ≤42.1 V during 100 A surge events, preventing latch-up in upstream DC-DC controllers such as LM5164. |
Use Scenario: Input protection for LIN bus transceivers exposed to battery disconnection spikes in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN line (VWM = 26 V) to absorb ±100 V/50 ms pulses without forward conduction. Use Value: Maintains signal integrity below 1 Mbps LIN timing budget while surviving ISO 16750-2 test pulses without parametric shift. |
| Telecom Power Supplies | Industrial PLC I/O Modules |
|
Use Scenario: Secondary-side overvoltage suppression on 24 V auxiliary outputs feeding PoE injectors and remote PHYs. IC Role / Device Role / Timing Role: Fast-response clamping device parallel to output capacitor, triggered only during fault conditions. Use Value: Prevents catastrophic failure of TPS54302 regulators during hot-swap insertion surges due to its 1.0 µA leakage at 26 V. |
Use Scenario: Field-side analog input protection against accidental 24 V DC wiring faults in 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Primary overvoltage barrier before precision op-amp front-end (e.g., INA188), rated for continuous 26 V operation. Use Value: Enables >100 kV/µs transient immunity while contributing <0.01 % gain error via 1.0 µA leakage at VWM. |
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_A/I | Same electrical specs but RoHS-compliant (non-halogen-free) variant; no halogen-free certification. | Approved for commercial/industrial use where halogen-free mandate does not apply (e.g., non-automotive consumer gear). | Select when cost-sensitive designs require RoHS compliance without halogen-free material restrictions. |
| SMAJ26A-M3/A | Lower 400 W PPPM, SMA package (smaller footprint, higher RθJA = 140 °C/W), same VWM/VC ratings. | Suitable for space-constrained PCBs with lower surge exposure (e.g., USB-C PD adapters). | Choose only if board area is critical and surge energy remains within 400 W limit - not drop-in for automotive load-dump. |
Compared with SMBJ26AHM3_A/I, the HE3 variant lacks halogen-free validation but offers identical clamping and thermal performance, while the SMAJ26A-M3/A trades 33 % lower surge capacity and reduced thermal margin for 30 % smaller PCB area - making SMBJ26AHM3_A/I the sole choice for AEC-Q101-compliant 600 W protection.
Availability
SMBJ26AHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and industrial PLC I/O modules requiring stable component supply with guaranteed long-term continuity.
Supply support for SMBJ26AHM3_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, rectifiers, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of SMBJ26AHM3_A/I at its rated peak pulse current?
The SMBJ26AHM3_A/I 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 surge waveform. This value is guaranteed across the full operating temperature range and ensures downstream components remain within safe voltage limits during transient events. The SMBJ26AHM3_A/I achieves this with a low clamping ratio of 1.47 relative to its minimum breakdown voltage.
Is SMBJ26AHM3_A/I qualified for automotive applications?
Yes, SMBJ26AHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88392. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and body electronics in passenger vehicles. The SMBJ26AHM3_A/I meets all requirements for use in automotive ECUs without additional qualification effort.
What does the "HM3" suffix indicate in SMBJ26AHM3_A/I?
The "HM3" suffix in SMBJ26AHM3_A/I denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-609A Class 1 standards, along with Vishay's commercial-grade reliability screening. It distinguishes this variant from the "HE3" (RoHS only) and "E3" (legacy RoHS) versions. The SMBJ26AHM3_A/I also carries AEC-Q101 qualification, making it the preferred option for automotive programs requiring both environmental compliance and automotive-grade reliability.
Can SMBJ26AHM3_A/I be used in bidirectional protection circuits?
No, SMBJ26AHM3_A/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMBJ26CA). Using SMBJ26AHM3_A/I in bidirectional configurations would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always match the SMBJ26AHM3_A/I polarity to the protected line's expected voltage polarity.
What is the thermal resistance specification for SMBJ26AHM3_A/I?
The SMBJ26AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads per terminal. These values define its ability to dissipate surge energy without exceeding the +150 °C maximum junction temperature. Derating curves in Figure 2 of datasheet 88392 must be applied for ambient temperatures above 25 °C to maintain reliability of the SMBJ26AHM3_A/I.
SMBJ26AHM3_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:
- 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_A/I FAQ
1.How can I place an order for SMBJ26AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26AHM3_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 SMBJ26AHM3_A/I reliable?
The price and inventory of SMBJ26AHM3_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 SMBJ26AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ26AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26AHM3_A/I?
SMBJ26AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26AHM3_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 SMBJ26AHM3_A/I?
For technical support, including SMBJ26AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ26AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ26AHM3_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 SMBJ26AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ26AHM3_A/I?
All SMBJ26AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26AHM3_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 SMBJ26AHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ26AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26AHM3_A/I Tags
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