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Vishay General Semiconductor - Diodes Division SA26AHE3/54
- Part No.:
- SA26AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA26AHE3/54.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,639
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Product details
Overview
SA26AHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for circuit protection against ESD and surge transients. It features 500 W peak pulse power (10/1000 μs), 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR at 1.0 mA), 42.1 V clamping voltage at 11.9 A peak pulse current, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA26AHE3/54 datasheet, SA26AHE3/54 pinout, SA26AHE3/54 application, or SA26AHE3/54 equivalent, this device is selected for robust overvoltage protection in DC power rails, sensor interfaces, and MOSFET gate drivers where fast response (<1 ns), low clamping ratio, and high surge reliability are required.
Technical Context
The SA26AHE3/54 operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transient events. Its 26 V stand-off rating allows stable operation across 24 V automotive and industrial supply rails while maintaining <5 μA reverse leakage at rated VWM.
Clamping performance is defined by 42.1 V maximum at 11.9 A (10/1000 μs), yielding a clamping ratio of 1.62 - critical for protecting downstream 3.3 V or 5 V logic from 24 V rail faults. The device sustains 70 A non-repetitive forward surge (10 ms half-sine) and operates from –55 °C to +175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before conduction; sets safe margin above 24 V nominal rail. |
| VBR (min/max) | 28.9 V / 31.9 V at 1.0 mA - Confirmed breakdown threshold ensures predictable turn-on during transients. |
| VC @ IPPM | 42.1 V at 11.9 A - Clamping voltage limits stress on protected ICs during 500 W surge events. |
| PPPM | 500 W (10/1000 μs) - Sustains industry-standard lightning/surge test waveforms without failure. |
| IFSM | 70 A (10 ms half-sine) - Withstands inrush and fault currents in power distribution paths. |
| TJ range | –55 °C to +175 °C - Validated for under-hood automotive and industrial ambient extremes. |
| AEC-Q101 | Qualified - Meets stress-test requirements for automotive electronic modules per JESD22. |
Pinout & Package
Package: DO-15 (DO-204AC) - axial-leaded, epoxy-molded case with matte tin-plated leads; RoHS-compliant and qualified to J-STD-002 solderability standards. Polarity marked by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return; completes clamping loop during positive transients. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., 24 V rail); conducts avalanche current when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche behavior and long-term reliability under repetitive surge stress. |
| 500 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV) surge immunity requirements for industrial and automotive systems. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules without additional qualification effort. |
| Low incremental surge resistance | Minimizes VC overshoot and energy dissipation during fast-rising transients (e.g., load dump). |
| Solder dip rated 275 °C / 10 s | Supports lead-free reflow and wave soldering processes without delamination or parameter shift. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before they reach DC/DC converters. Use Value: Limits peak voltage to 42.1 V, preventing damage to 40 V-rated input stages of buck regulators and microcontrollers. | Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation equipment from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across signal and ground near connector to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 ns response and <5 μA leakage preserve sensor accuracy while ensuring immunity to field-deployed ESD threats. |
| MOSFET Gate Driver Protection | Telecom DC Power Input Protection |
Use Scenario: Safeguarding high-side N-channel MOSFET gate drivers in motor control inverters from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: TVS placed between gate and source to clamp dv/dt-induced overshoot during switching transitions. Use Value: 26 V VWM avoids false triggering during normal 20 V gate drive, while 42.1 V clamping prevents gate oxide rupture. | Use Scenario: Securing –48 V telecom power inputs against lightning-induced surges on outdoor cabinet feeds. IC Role / Device Role / Timing Role: Unidirectional TVS installed on negative rail relative to chassis ground to suppress common-mode transients. Use Value: 500 W rating handles 10/1000 μs surges up to 1.2 kV; DO-15 package enables manual repair and high-voltage creepage spacing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/52 | Same VWM (26 V), lower PPPM (400 W), SMA package (surface-mount) | Requires PCB redesign for SMT layout; lacks AEC-Q101 qualification | Select when board space is constrained and automotive qualification is not required. |
| 1.5KE27A | Higher VWM (27 V), same DO-15 package, 1500 W PPPM, no AEC-Q101 | Less precise clamping (VC = 43.5 V @ 34.7 A); suited for higher-energy but non-automotive systems | Choose for legacy designs needing higher surge margin without qualification constraints. |
Compared with SMAJ26A-E3/52 and 1.5KE27A, the SA26AHE3/54 delivers AEC-Q101 assurance, tighter VBR tolerance (±5.2%), and optimized clamping for 24 V systems - making it the preferred choice for new automotive and high-reliability industrial designs where qualification and parametric consistency are mandatory.
Availability
SA26AHE3/54 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and motor control gate drivers requiring stable component supply and full traceability.
Supply support for SA26AHE3/54 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, automotive qualification, and high-volume manufacturability.
The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications where surge immunity and long-term stability are critical.
FAQ
What is the clamping voltage of the SA26AHE3/54 under standard surge conditions?
The SA26AHE3/54 has a maximum clamping voltage (VC) of 42.1 V at 11.9 A peak pulse current using the 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during a 500 W transient event. The SA26AHE3/54 maintains this clamping performance across its full operating temperature range.
Is the SA26AHE3/54 suitable for automotive applications?
Yes, the SA26AHE3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction - including glass-passivated junction, DO-15 package with matte tin leads, and operation up to +175 °C junction temperature - meets stress-test requirements for engine bay and chassis-mounted modules. The SA26AHE3/54 appears in Vishay's automotive-grade ordering matrix with HE3 suffix denoting qualification.
How does the SA26AHE3/54 differ from bidirectional TVS diodes like SA26CA?
The SA26AHE3/54 is unidirectional and conducts only during reverse-biased overvoltage events, making it ideal for DC power rail protection where polarity is fixed. In contrast, SA26CA is bidirectional and clamps both polarities - used in AC lines or data lines with undefined signal polarity. The SA26AHE3/54 offers lower leakage (<5 μA at 26 V) and tighter VBR tolerance than its bidirectional counterpart.
What is the meaning of the "HE3/54" suffix in SA26AHE3/54?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance; "/54" denotes the preferred package code for 13-inch paper tape and reel packaging with 4000 units per reel. This ordering format aligns with Vishay's standard logistics coding and confirms the part meets automotive reliability and handling requirements.
Can the SA26AHE3/54 be used in place of older SA26A variants without design changes?
Yes - the SA26AHE3/54 is a direct replacement for legacy SA26A parts in DO-15 package, retaining identical electrical specifications, mechanical dimensions, and pinout. The HE3 qualification adds automotive reliability without altering footprint or performance; no PCB or schematic changes are needed when upgrading from non-qualified SA26A versions.
SA26AHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- 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 ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA26AHE3/54 FAQ
1.How can I place an order for SA26AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA26AHE3/54 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 SA26AHE3/54 reliable?
The price and inventory of SA26AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA26AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA26AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA26AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA26AHE3/54?
SA26AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA26AHE3/54 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 SA26AHE3/54?
For technical support, including SA26AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA26AHE3/54 requirements.
6.How does Aetrix verify that SA26AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA26AHE3/54 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 SA26AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA26AHE3/54?
All SA26AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA26AHE3/54, 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 SA26AHE3/54 part is unused and in its original packaging.
Return procedure for SA26AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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