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Vishay General Semiconductor - Diodes Division SMA5J26AHE3_A/I
- Part No.:
- SMA5J26AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26AHE3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J26AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown range (VBR), 42.1 V clamping voltage at 11.9 A peak pulse current (IPPM), and 500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard automotive ECUs, industrial sensor interfaces, and DC power rails against ESD and load dump transients.
For engineers reviewing the SMA5J26AHE3_A/I datasheet, SMA5J26AHE3_A/I pinout, SMA5J26AHE3_A/I application, or SMA5J26AHE3_A/I equivalent, key selection criteria include verified clamping performance under 10/1000 µs surge, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior and low incremental surge resistance. Its response time is sub-nanosecond, enabling effective suppression of fast-rising transients such as ISO 7637-2 pulse 1/2a/5a and IEC 61000-4-2 ESD events.
The device is rated for continuous operation from −55 °C to +150 °C junction temperature, with thermal performance validated on minimum recommended pad layout per JESD51-3. It meets MSL level 1 (260 °C reflow peak) and is qualified to AEC-Q101 for automotive use - confirmed by the "HE3" suffix and revision "A/I" tape-and-reel packaging code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - maximum continuous reverse voltage before conduction; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage |
| VC (Clamping Voltage) | 42.1 V at 11.9 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 500 W - energy-handling capacity for standardized 10/1000 µs surge; enables robust front-end protection |
| IPPM (Peak Pulse Current) | 11.9 A - maximum non-repetitive surge current supported without degradation |
| TJ max. | +150 °C - maximum junction temperature; supports under-hood automotive and industrial ambient conditions |
| RθJA | 80 °C/W - thermal resistance junction-to-ambient on standard 5.0 mm × 5.0 mm pads; informs board-level thermal design |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band; unidirectional only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane; forms clamping loop with cathode |
| Cathode (banded end) | Reverse-biased terminal during normal operation | Connected to protected line (e.g., 24 V rail); conducts avalanche current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients; improves clamping precision beyond VC spec |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| RoHS-compliant & halogen-free option available | Meets global environmental compliance requirements including JEDEC JESD201 Class 2 whisker resistance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump (ISO 7637-2 Pulse 5a) and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and chassis ground to divert surge energy away from downstream regulators and microcontrollers. Use Value: Clamps to 42.1 V at 11.9 A, limiting stress on 36 V-rated input stages while surviving 500 W transient energy without failure. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in programmable logic controllers (PLCs) exposed to field wiring transients. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS mounted at connector entry point to shunt induced surges before reaching precision DACs or op-amps. Use Value: Sub-nanosecond response prevents latch-up in sensitive analog front-ends; RθJA = 80 °C/W allows reliable operation in sealed enclosures up to +85 °C ambient. |
| DC-DC Converter Input Protection | Telecom Power Feeding Protection |
Use Scenario: Front-end surge suppression on 48 V input of isolated DC-DC modules in base station power systems. IC Role / Device Role / Timing Role: Primary clamping device in series with input filter inrush limiters, coordinated with MOVs for multi-stage protection. Use Value: 26 V VWM provides 20 % margin above nominal 48 V system (derated for ripple), while 500 W rating handles repeated lightning-induced surges per IEC 61000-4-5. |
Use Scenario: Protecting PoE-powered devices (e.g., IP cameras) against longitudinal surges on data pairs carrying 48–57 V DC power feed. IC Role / Device Role / Timing Role: Unidirectional TVS placed across each powered pair (tip/ring to ground) to clamp common-mode transients without disrupting DC bias. Use Value: Cathode-band polarity ensures correct orientation for DC-fed lines; AEC-Q101 qualification adds confidence for outdoor telecom deployments with wide temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J26AHM3_A/I | Halogen-free, RoHS-compliant, AEC-Q101 qualified - identical electrical specs and package | No functional difference; selected when halogen-free material compliance is mandated | Drop-in replacement where environmental specification requires halogen-free construction |
| SMCJ26AHE3_A/I | Same VWM/VC, but SMC (DO-214AB) package - 1.5× larger footprint, higher IPPM (19.2 A), lower RθJA (50 °C/W) | Better thermal performance and surge handling, but requires PCB layout change | Choose when higher surge margin or improved thermal dissipation is needed and board space permits larger package |
Compared with SMA5J26AHE3_A/I, SMA5J26AHM3_A/I offers identical protection performance with halogen-free materials, while SMCJ26AHE3_A/I delivers enhanced thermal and surge capability in a larger package - enabling trade-offs between board density, environmental compliance, and ruggedness.
Availability
SMA5J26AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power feeding applications requiring stable component supply, AEC-Q101 qualification, and consistent surge immunity performance across production batches.
Supply support for SMA5J26AHE3_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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-power density packaging.
The SMA5JxxA family is engineered for high-energy transient suppression in space-constrained automotive and industrial environments, combining AEC-Q101 qualification, low-profile SMA packaging, and precise clamping performance across 5.0–40 V VWM range.
FAQ
What is the clamping voltage of the SMA5J26AHE3_A/I under a 10/1000 µs surge?
The SMA5J26AHE3_A/I has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 11.9 A with a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88875 and represents the upper voltage limit imposed on the protected circuit during worst-case transient events. The SMA5J26AHE3_A/I maintains this clamping performance across its qualified temperature range and after multiple surge events within rating limits.
Is the SMA5J26AHE3_A/I qualified for automotive applications?
Yes, the SMA5J26AHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in Vishay's datasheet 88875. It is specifically intended for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces. The qualification covers stress testing for temperature cycling, humidity, mechanical shock, and surge endurance - ensuring reliability in under-hood and cabin environments where the SMA5J26AHE3_A/I operates from −55 °C to +150 °C junction temperature.
What does the "A/I" suffix mean in SMA5J26AHE3_A/I?
The "A/I" suffix in SMA5J26AHE3_A/I indicates the revision code ("A") and packaging format ("I"). "I" denotes 13-inch diameter plastic tape-and-reel delivery containing 7500 units, compliant with EIA-481 standards. The "A" revision reflects the latest tested and documented version of the device's electrical and mechanical specifications per Vishay's 09-Jan-2024 revision of datasheet 88875. This suffix does not alter electrical performance but ensures traceability and alignment with current manufacturing and test protocols for the SMA5J26AHE3_A/I.
How does the SMA5J26AHE3_A/I compare to bidirectional TVS diodes like SMA5J26CA?
The SMA5J26AHE3_A/I is unidirectional and intended for DC circuits with defined polarity, where the cathode connects to the protected line and anode to ground. In contrast, SMA5J26CA is bidirectional and symmetrical - suitable for AC or floating signal lines. The SMA5J26AHE3_A/I offers lower leakage at VWM (1.0 µA vs. 2.0 µA for SMA5J26CA) and supports forward surge current (IFSM = 40 A), which SMA5J26CA does not specify. Selection depends on circuit topology, not interchangeability.
What is the thermal resistance of the SMA5J26AHE3_A/I, and how is it measured?
The SMA5J26AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W, measured on a standard PCB layout with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per JESD51-3. This value assumes no additional heatsinking and defines the temperature rise above ambient at steady-state power dissipation. For pulsed operation, transient thermal impedance (Fig. 5 in datasheet 88875) governs short-duration surge heating - critical for evaluating the SMA5J26AHE3_A/I's ability to survive repetitive transients without thermal runaway.
SMA5J26AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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):
- 11.9A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J26AHE3_A/I FAQ
1.How can I place an order for SMA5J26AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26AHE3_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 SMA5J26AHE3_A/I reliable?
The price and inventory of SMA5J26AHE3_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 SMA5J26AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J26AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26AHE3_A/I?
SMA5J26AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26AHE3_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 SMA5J26AHE3_A/I?
For technical support, including SMA5J26AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26AHE3_A/I requirements.
6.How does Aetrix verify that SMA5J26AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J26AHE3_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 SMA5J26AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J26AHE3_A/I?
All SMA5J26AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26AHE3_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 SMA5J26AHE3_A/I part is unused and in its original packaging.
Return procedure for SMA5J26AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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