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Vishay General Semiconductor - Diodes Division SMBJ26AHM3/H
- Part No.:
- SMBJ26AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26AHM3/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,655
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Product details
Overview
SMBJ26AHM3/H 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 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 automotive infotainment power supplies, industrial PLC I/O modules, and telecom base station DC inputs.
For engineers reviewing the SMBJ26AHM3/H datasheet, SMBJ26AHM3/H pinout, SMBJ26AHM3/H application, or SMBJ26AHM3/H 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 ESD and lightning-induced transient design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its VBR threshold, diverting surge current away from protected circuitry. Its low incremental surge resistance (typical <0.5 Ω) ensures minimal voltage overshoot during fast transients, while the glass-passivated junction guarantees stable leakage (<1.0 µA at VWM) and long-term reliability across -55 °C to +150 °C junction temperature range.
The SMBJ26AHM3/H is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine), supports automated SMT placement, and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile. Its halogen-free, RoHS-compliant construction (HM3 suffix) and AEC-Q101 qualification make it suitable for automotive-grade power rail protection where traceability and lifecycle continuity are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V systems. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed breakdown range ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamping voltage limits downstream IC stress during 600 W transient events. |
| PPPM | 600 W (10/1000 µs) - Peak surge power handling capability validated per ANSI/IEEE C62.35 standards. |
| IFSM | 100 A (8.3 ms half-sine) - Withstands high-energy inrush or fault currents without bond wire failure. |
| TJ max | +150 °C - Enables operation in under-hood automotive or high-ambient industrial environments. |
| Leakage @ VWM | ≤1.0 µA - Negligible standby power loss and no measurable loading on sensitive 24 V sensor rails. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line (e.g., 24 V rail); conducts avalanche current to ground during overvoltage. |
| Anode (unmarked end) | Reference/ground return | Typically tied to system ground plane; completes clamping path with minimal inductance for effective transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated energy absorption capacity for IEC 61000-4-5 Level 4 surges in industrial 24 V systems. |
| AEC-Q101 qualified (HM3 suffix) | Qualified for automotive power electronics including body control modules and ADAS power supplies. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-20E material requirements for green manufacturing. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over 15+ year field life in harsh environments. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply input of automotive infotainment head units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤42.1 V, preventing damage to downstream buck controller ICs rated for 45 V max input. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection device on 24 V optocoupler input side, upstream of series current-limiting resistor. Use Value: Clamps 1 kV/500 A surge (IEC 61000-4-5) within nanoseconds, preserving optocoupler isolation integrity and logic-level accuracy. |
| Telecom DC Power Input Protection | Medical Equipment Sensor Interface Protection |
Use Scenario: Safeguarding 48 V DC input of remote radio units in cellular base stations exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry point, coordinated with upstream fuse and secondary filtering. Use Value: Absorbs 600 W transient energy without degradation, maintaining <1 µA leakage to avoid false triggering of monitoring circuits. | Use Scenario: Protecting analog front-end inputs of patient-monitoring devices connected to external sensors via long cables. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) unidirectional TVS placed directly at connector interface before signal conditioning amplifier. Use Value: Prevents ESD events (>15 kV contact) from damaging precision op-amps while adding <0.5 pF parasitic capacitance to signal path. |
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/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment. | Select when halogen-free requirement or automotive qualification is not mandated. |
| SMCJ26A-H | Higher 1500 W PPPM; larger SMC (DO-214AB) package; same VWM/VC ratings. | Used where higher surge margin is required (e.g., outdoor telecom cabinets); requires PCB layout change. | Choose for enhanced surge robustness where board space permits larger footprint. |
Compared with SMBJ26AHM3/H, SMBJ26AHE3/H offers identical clamping and breakdown but omits halogen-free and AEC-Q101 compliance, while SMCJ26A-H provides double the surge power rating in a physically larger package - enabling trade-offs between automotive qualification, environmental compliance, and energy-handling headroom.
Availability
SMBJ26AHM3/H is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and telecom DC power inputs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ26AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in automotive, industrial, and communications infrastructure - prioritizing fast response, low clamping, and AEC-Q101 compliance.
FAQ
What is the clamping voltage of SMBJ26AHM3/H and how is it measured?
The SMBJ26AHM3/H has a maximum clamping voltage (VC) of 42.1 V, measured at a peak pulse current (IPPM) of 14.3 A using a standardized 10/1000 µs double-exponential surge waveform. This value reflects the actual voltage seen by downstream circuitry during worst-case transient events and is guaranteed across the full operating temperature range (-55 °C to +150 °C). The SMBJ26AHM3/H achieves this with low incremental surge resistance, ensuring consistent clamping performance in real-world surge conditions.
Is SMBJ26AHM3/H qualified for automotive applications?
Yes, SMBJ26AHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's official datasheet (Document Number: 88392, Revision: 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for automotive power electronics such as body control modules, infotainment systems, and ADAS power supplies where reliability under thermal and mechanical stress is critical.
What does the "HM3" suffix mean in SMBJ26AHM3/H?
The "HM3" suffix in SMBJ26AHM3/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" denotes the halogen-free formulation meeting JEDEC JS709B requirements, "M3" confirms RoHS compliance per EU Directive 2011/65/EU, and the qualification is explicitly stated in Vishay's ordering information table for automotive-grade variants. This makes SMBJ26AHM3/H compliant with both environmental regulations and automotive reliability standards in a single package.
How does SMBJ26AHM3/H compare to bidirectional TVS diodes like SMBJ26CA?
SMBJ26AHM3/H is unidirectional and intended for DC line protection where polarity is fixed, offering lower leakage (<1.0 µA at 26 V) and no reverse conduction path. In contrast, SMBJ26CA is bidirectional and suited for AC or floating signal lines, exhibiting symmetrical clamping in both directions but with higher leakage at stand-off voltage. The SMBJ26AHM3/H cannot replace SMBJ26CA in AC-coupled applications without circuit redesign, and vice versa - selection depends strictly on signal polarity and grounding architecture.
What is the thermal resistance and power derating behavior of SMBJ26AHM3/H?
SMBJ26AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads. Its 5.0 W steady-state power dissipation (PD) derates linearly above 25 °C ambient, reaching zero at +150 °C junction temperature. Derating curves in Figure 2 of the Vishay datasheet confirm 80% power capability at 50 °C ambient - essential for thermal design in enclosed industrial enclosures or automotive junction boxes where airflow is limited.
SMBJ26AHM3/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:
- 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:
- 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/H FAQ
1.How can I place an order for SMBJ26AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26AHM3/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/H reliable?
The price and inventory of SMBJ26AHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMBJ26AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26AHM3/H?
SMBJ26AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26AHM3/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/H?
For technical support, including SMBJ26AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26AHM3/H requirements.
6.How does Aetrix verify that SMBJ26AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ26AHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMBJ26AHM3/H?
All SMBJ26AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26AHM3/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/H part is unused and in its original packaging.
Return procedure for SMBJ26AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26AHM3/H Tags
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