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Vishay General Semiconductor - Diodes Division SMA5J26AHE3/5A
- Part No.:
- SMA5J26AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26AHE3/5A.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J26AHE3/5A 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 (10/1000 µs waveform). It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMA5J26AHE3/5A datasheet, SMA5J26AHE3/5A pinout, SMA5J26AHE3/5A application, or SMA5J26AHE3/5A equivalent, key selection criteria include unidirectional polarity, 500 W surge rating, AEC-Q101 qualification, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (28.9–31.9 V), limiting transient energy to ≤42.1 V at 11.9 A. Its glass-passivated junction ensures stable leakage (<1.0 µA at 26 V) and fast response time (<1 ns).
Designed for single-polarity DC rail protection, it supports peak forward surge current of 40 A (8.3 ms half-sine) and operates across -55 °C to +150 °C junction temperature. The SMA (DO-214AC) package enables surface-mount integration with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR (min/max) | 28.9 V / 31.9 V - Measured at 1 mA; ensures reliable turn-on within defined tolerance band for consistent surge response. |
| VC @ IPPM | 42.1 V - Clamped voltage at 11.9 A peak pulse current; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 500 W - Peak pulse power handling (10/1000 µs waveform); defines single-event surge energy absorption capability. |
| IPPM | 11.9 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify layout survivability. |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal derating limits for sustained operation under repeated surges. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements when mounted on 5.0 mm × 5.0 mm copper pads. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with cathode band marking. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return node; forms clamping loop with cathode during transients. |
| Cathode (banded end) | Reverse-biased terminal / Protection node input | Connected to protected line (e.g., 24 V rail); avalanche conduction initiates here when VWM is exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test plan. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA) over lifetime and temperature extremes. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving clamping fidelity. |
| MSL Level 1 (260 °C peak) | Enables standard reflow soldering without moisture sensitivity concerns or baking requirements. |
| 500 W peak pulse power | Supports protection against high-energy transients such as load dump (ISO 16750-2) and inductive switching spikes. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) and body control modules (BCMs) against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between 24 V rail and chassis ground to limit voltage excursions to ≤42.1 V. Use Value: Prevents damage to downstream PMICs and microcontrollers during ISO 16750-2 load dump events (up to 120 V, 400 ms). |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) and digital I/O of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance transient clamp on sensor signal paths to suppress ESD and inductive coupling without distorting signal integrity. Use Value: Maintains <1.0 µA leakage at 26 V, avoiding offset errors in precision current-loop receivers while surviving ±30 kV contact ESD (IEC 61000-4-2). |
| DC Motor Drive Protection | Telecom Power Input Protection |
Use Scenario: Shielding H-bridge gate drivers and freewheeling diodes from back-EMF spikes generated during brushed DC motor commutation. IC Role / Device Role / Timing Role: Fast-response (sub-ns) unidirectional TVS placed across motor terminals or supply inputs to clamp inductive kickback. Use Value: Limits transient voltage to 42.1 V at 11.9 A, preventing gate oxide rupture in MOSFETs rated for ≤60 V VDSS. |
Use Scenario: Guarding primary-side DC input (e.g., 24–48 V) of PoE-powered network switches and base station radios against lightning-induced surges. IC Role / Device Role / Timing Role: First-stage surge suppression before DC/DC converters and hot-swap controllers in telecom power entry modules. Use Value: Absorbs 500 W (10/1000 µs) without degradation, enabling compliance with ITU-T K.20 and Telcordia GR-1089-CORE surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J26A-E3/5A | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and package. | Not suitable for automotive production; acceptable for industrial prototypes or non-safety-critical consumer designs. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| SMA6J26AHE3/5A | 600 W peak pulse power (vs. 500 W); same VWM, VBR, and package; higher IPPM (13.3 A) and VC (45.7 V). | Better suited for higher-energy threats (e.g., extended-duration load dump); slightly higher clamping increases stress on protected ICs. | Choose when system-level surge testing requires >500 W margin and downstream components tolerate up to 45.7 V clamping. |
Compared with SMA5J26AHE3/5A, SMA5J26A-E3/5A offers identical protection performance without automotive qualification, while SMA6J26AHE3/5A trades higher clamping voltage for greater surge energy capacity-enabling design flexibility for varying threat levels without changing PCB layout.
Availability
SMA5J26AHE3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, DC motor drives, and telecom power supplies requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMA5J26AHE3/5A 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, power density, and automotive-grade validation.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained, high-reliability applications-particularly where AEC-Q101 qualification, low-profile SMT packaging, and precise clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMA5J26AHE3/5A and how is it measured?
The SMA5J26AHE3/5A has a maximum clamping voltage (VC) of 42.1 V, measured at a peak pulse current (IPPM) of 11.9 A using a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88875, Rev. 09-Jan-2024) and reflects the maximum voltage seen across the SMA5J26AHE3/5A during standardized surge testing-critical for ensuring protected ICs remain within their absolute maximum ratings.
Is the SMA5J26AHE3/5A suitable for automotive applications?
Yes, the SMA5J26AHE3/5A is AEC-Q101 qualified, as indicated by the "HE3" suffix, and is explicitly intended for automotive use. It meets stress test requirements for temperature cycling, high-temperature reverse bias, and ESD robustness. The SMA5J26AHE3/5A is commonly deployed in engine control units, body electronics, and ADAS power domains where certified reliability is mandatory.
What does the "5A" in SMA5J26AHE3/5A signify?
The "5A" denotes the preferred packaging option: 13-inch diameter plastic tape and reel containing 7500 units. This format supports high-volume automated SMT assembly. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "SMA5J26A" identifies the specific 26 V unidirectional TVS variant within the SMA5J family.
How does the SMA5J26AHE3/5A differ from bidirectional variants like SMA5J26CA?
The SMA5J26AHE3/5A is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMA5J26CA is bidirectional with no polarity marking and symmetrical clamping in both directions. Electrically, SMA5J26AHE3/5A has VWM = 26 V and VBR = 28.9–31.9 V, while SMA5J26CA has VWM = 26 V but VBR = 28.9–31.9 V in both polarities-making SMA5J26AHE3/5A appropriate for DC rail protection and SMA5J26CA for AC or floating signal lines.
What is the thermal resistance of the SMA5J26AHE3/5A and how does it affect layout?
The SMA5J26AHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard JEDEC test conditions; reducing pad area or omitting thermal vias increases RθJA, potentially causing thermal runaway during repetitive surges. Layout must follow Vishay's recommended pad dimensions to maintain rated 500 W pulse capability.
SMA5J26AHE3/5A 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J26AHE3/5A FAQ
1.How can I place an order for SMA5J26AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26AHE3/5A 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 SMA5J26AHE3/5A reliable?
The price and inventory of SMA5J26AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J26AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J26AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26AHE3/5A?
SMA5J26AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26AHE3/5A 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 SMA5J26AHE3/5A?
For technical support, including SMA5J26AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26AHE3/5A requirements.
6.How does Aetrix verify that SMA5J26AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J26AHE3/5A 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 SMA5J26AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J26AHE3/5A?
All SMA5J26AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26AHE3/5A, 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 SMA5J26AHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J26AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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