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Vishay General Semiconductor - Diodes Division SMBJ26AHM3_A/H
- Part No.:
- SMBJ26AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26AHM3_A/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,713
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Product details
Overview
SMBJ26AHM3_A/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 power supplies and automotive ECUs.
For engineers reviewing the SMBJ26AHM3_A/H datasheet, SMBJ26AHM3_A/H pinout, SMBJ26AHM3_A/H application, or SMBJ26AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status (indicated by HM3 suffix), halogen-free RoHS compliance, thermal resistance (RθJA = 100 °C/W), and junction temperature range (–55 °C to +150 °C).
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 26 V stand-off voltage and rapidly transitions to low-impedance conduction when transient overvoltage exceeds its 28.9–31.9 V breakdown threshold. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1.0 ps typical), enabling protection of sensitive downstream circuitry against ESD, load dump, and inductive switching spikes.
The SMBJ26AHM3_A/H is rated for 600 W peak pulse power (10/1000 µs), supports 100 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits low incremental surge resistance - critical for minimizing voltage overshoot during high-current transients. Its MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility support automated SMT assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on under specified test conditions. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage during 600 W transient; determines maximum stress imposed on protected ICs. |
| PPPM | 600 W - Peak pulse power handling capability with 10/1000 µs waveform; defines transient energy absorption capacity. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against load-dump events. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial environments. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs PCB thermal design requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by band marking on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side (e.g., ground or return path) during transient clamping. |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to protected line (e.g., 24 V rail or signal input); conducts surge current toward ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets environmental compliance mandates for global OEM supply chains without compromising electrical performance. |
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage exposure to downstream components compared to higher-ratio TVS devices. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT processes without baking or special handling prior to assembly. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in vehicle body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤42.1 V, preventing damage to 36 V-rated regulators and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature sensors) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair near connector entry point. Use Value: Sub-1 µA leakage at 26 V preserves signal integrity; fast response prevents latch-up in precision ADC front-ends. |
| Telecom Power Input Stage | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered equipment inputs from induced surges on Ethernet cables and AC adapters. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V DC input before isolation and regulation stages. Use Value: Withstands repetitive 600 W pulses at 0.01% duty cycle, supporting long-term reliability in always-on infrastructure gear. |
Use Scenario: Suppressing flyback voltage spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals to shunt inductive kickback into the power rail. Use Value: 100 A IFSM rating handles worst-case 8.3 ms surge currents without degradation or thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26AHE3_A/H | Same electrical specs but RoHS-compliant (not halogen-free); lacks halogen-free certification. | Acceptable for commercial-grade designs where halogen-free material is not mandated. | Select when cost-sensitive commercial applications do not require halogen-free compliance. |
| SMAJ26A-HF | Lower peak pulse power (400 W vs. 600 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Not suitable for high-energy transients like load dump; limited to low-power signal-line protection. | Choose only for space-constrained, low-energy applications where 400 W rating suffices. |
Compared with SMBJ26AHE3_A/H and SMAJ26A-HF, the SMBJ26AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and full 600 W surge capability - making it the only option qualified for automotive power rail protection requiring both environmental compliance and high-energy robustness.
Availability
SMBJ26AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and telecom power input protection requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SMBJ26AHM3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 validation, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBJ26AHM3_A/H at its rated peak pulse current?
The SMBJ26AHM3_A/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 waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is confirmed in Vishay's official datasheet revision 09-Jan-2024, Document Number 88392.
Is SMBJ26AHM3_A/H qualified for automotive applications?
Yes, SMBJ26AHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix in its part number - denoting halogen-free, RoHS-compliant, and automotive-grade validation. It meets stress test requirements for temperature cycling, humidity, mechanical shock, and surge robustness required in engine control, body electronics, and ADAS subsystems.
What does the "HM3" suffix mean in SMBJ26AHM3_A/H?
The "HM3" suffix in SMBJ26AHM3_A/H specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" (RoHS only) or "M3" (halogen-free, non-automotive) versions - confirming compliance with automotive material and reliability standards per Vishay's ordering nomenclature guide.
What is the maximum reverse leakage current for SMBJ26AHM3_A/H at its stand-off voltage?
The SMBJ26AHM3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 26 V stand-off voltage (VWM), measured at 25 °C. This low leakage ensures minimal power loss and signal interference in always-on circuits such as automotive wake-up lines or sensor bias networks.
Can SMBJ26AHM3_A/H be used in bidirectional configurations?
No, SMBJ26AHM3_A/H is a unidirectional TVS diode, as confirmed by its "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., SMBJ26CA). Using SMBJ26AHM3_A/H in reverse-biased configurations risks permanent breakdown due to lack of symmetrical avalanche structure.
SMBJ26AHM3_A/H 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/H FAQ
1.How can I place an order for SMBJ26AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26AHM3_A/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_A/H reliable?
The price and inventory of SMBJ26AHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ26AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26AHM3_A/H?
SMBJ26AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26AHM3_A/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_A/H?
For technical support, including SMBJ26AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ26AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ26AHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ26AHM3_A/H?
All SMBJ26AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26AHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMBJ26AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26AHM3_A/H Tags
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