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Vishay General Semiconductor - Diodes Division SMA5J26AHM3/H
- Part No.:
- SMA5J26AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26AHM3/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,917
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Product details
Overview
SMA5J26AHM3/H from Vishay General Semiconductor is a unidirectional 500 W Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, with 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR), and 42.1 V clamping voltage (VC) at 11.9 A peak pulse current. It protects MOSFETs and ICs against inductive switching transients in automotive power electronics.
For engineers reviewing the SMA5J26AHM3/H datasheet, SMA5J26AHM3/H pinout, SMA5J26AHM3/H application, or SMA5J26AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), 150 °C max junction temperature, and low incremental surge resistance for robust ESD and lightning surge immunity in harsh environments.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds VBR (min 28.9 V), clamping transient energy within nanoseconds. Its glass-passivated junction ensures stable leakage (<1.0 μA at 26 V) and repeatable breakdown behavior across temperature.
Designed for surface-mount placement on PCBs with minimum 5.0 mm × 5.0 mm copper pads per terminal, it delivers 500 W peak pulse power (10/1000 μs waveform) with thermal resistance RθJA = 80 °C/W and RθJL = 25 °C/W - enabling reliable operation up to 150 °C junction temperature without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before conduction begins; defines safe signal line bias margin. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - precise avalanche threshold ensuring consistent turn-on across production lots. |
| VC @ IPPM | 42.1 V at 11.9 A - clamped voltage during 500 W transient; limits downstream component stress below rated voltage. |
| PPPM | 500 W - peak pulse power handling (10/1000 μs); supports high-energy surges from load dump or inductive kick. |
| IFSM | 40 A - non-repetitive forward surge rating (8.3 ms half-sine); enables survival of brief overcurrent events. |
| TJ max | 150 °C - maximum junction temperature; allows operation in under-hood automotive environments. |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 2.54 mm lead pitch and MSL Level 1 moisture sensitivity. |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for thermal and surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; carries full surge current during clamping. |
| Cathode | Reverse-biased input / protected line connection | Connected to the line being protected (e.g., 24 V rail); blocks 26 V DC but avalanches above ~29 V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power rails. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental standards and end-of-life recycling requirements without compromising surge robustness. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for 3.3 V or 5 V logic interfaces downstream. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage current over 15+ years in industrial temperature ranges. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking - reduces manufacturing complexity and cost. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control modules from load dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps 100 V/100 ms transients to ≤42.1 V, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at connector interface to suppress ESD (IEC 61000-4-2 ±8 kV) and cable discharge events. Use Value: Sub-1 ns response time and <1.0 μA leakage at 26 V preserve signal integrity and measurement accuracy. |
| Telecom DC Feeder Protection | Consumer Power Adapter Input Stage |
Use Scenario: Shielding PoE-powered equipment front-end from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary surge clamp on DC input before isolation transformer or filter stage. Use Value: 500 W rating handles combination wave surges (1.2/50 μs + 8/20 μs) per IEC 61000-4-5 Level 4. |
Use Scenario: Input-stage transient suppression in universal-input AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Secondary-side TVS on 12 V or 19 V output rail to protect USB-PD controllers and charging ICs. Use Value: Halogen-free HM3 construction meets UL/cUL and regional eco-regulatory mandates without derating performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J26AHE3/H | RoHS-compliant (E3), non-halogen-free; same electrical specs and AEC-Q101 qualification. | Preferred where halogen content is unrestricted but automotive qualification is required. | Select SMA5J26AHE3/H for cost-sensitive automotive programs without halogen restrictions. |
| SMA5J26A-M3/61 | Same electrical specs and halogen-free (M3), but commercial-grade (non-AEC-Q101 qualified). | Suitable for industrial or consumer applications where automotive reliability validation is not mandated. | Choose SMA5J26A-M3/61 for non-automotive designs needing halogen-free compliance at lower qualification cost. |
Compared with SMA5J26AHM3/H, SMA5J26AHE3/H offers identical surge performance and automotive qualification but lacks halogen-free certification, while SMA5J26A-M3/61 provides halogen-free compliance without AEC-Q101 validation - enabling tiered sourcing based on end-equipment requirements.
Availability
SMA5J26AHM3/H is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface protection, and telecom DC feeder applications requiring stable component supply, long-lifecycle support, and traceable halogen-free sourcing.
Supply support for SMA5J26AHM3/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 high-reliability, high-power-density solutions.
The SMA5J series was developed to deliver automotive-grade transient suppression in compact surface-mount packages, targeting 12 V/24 V/48 V systems where space, thermal performance, and AEC-Q101 compliance are critical.
FAQ
What is the clamping voltage of the SMA5J26AHM3/H under peak pulse conditions?
The SMA5J26AHM3/H has a maximum clamping voltage (VC) of 42.1 V at 11.9 A peak pulse current (IPPM) using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J26AHM3/H maintains this clamping performance across its specified operating temperature range.
Is the SMA5J26AHM3/H qualified for automotive applications?
Yes, the SMA5J26AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation (Document Number 88875, Revision 09-Jan-2024). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD robustness, making it suitable for engine control units, body electronics, and ADAS power domains.
What does the 'HM3' suffix indicate in SMA5J26AHM3/H?
The 'HM3' suffix in SMA5J26AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only), M3 (halogen-free commercial), and HE3 (RoHS + AEC-Q101) versions. The 'H' prefix confirms automotive qualification, and 'M3' specifies halogen-free materials per IEC 61249-2-21.
How does the SMA5J26AHM3/H compare to bidirectional TVS diodes like SMA5J26CA?
The SMA5J26AHM3/H is unidirectional and intended for DC line protection with defined polarity (cathode band), whereas SMA5J26CA is bidirectional and used in AC or floating signal paths. SMA5J26AHM3/H offers lower leakage (<1.0 μA at 26 V) and higher surge current capability in one direction, but cannot protect symmetrically - unlike SMA5J26CA which clamps equally in both polarities.
What is the recommended PCB pad layout for optimal thermal and surge performance of the SMA5J26AHM3/H?
Vishay specifies mounting the SMA5J26AHM3/H on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 500 W pulse power and thermal resistance (RθJA = 80 °C/W). Smaller pads reduce surge capability and increase junction temperature; internal copper planes and thermal vias further improve heat dissipation in high-reliability designs.
SMA5J26AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 11.9A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J26AHM3/H FAQ
1.How can I place an order for SMA5J26AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26AHM3/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 SMA5J26AHM3/H reliable?
The price and inventory of SMA5J26AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J26AHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J26AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26AHM3/H?
SMA5J26AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26AHM3/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 SMA5J26AHM3/H?
For technical support, including SMA5J26AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26AHM3/H requirements.
6.How does Aetrix verify that SMA5J26AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J26AHM3/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 SMA5J26AHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J26AHM3/H?
All SMA5J26AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26AHM3/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 SMA5J26AHM3/H part is unused and in its original packaging.
Return procedure for SMA5J26AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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