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Vishay General Semiconductor - Diodes Division SA26HE3/54
- Part No.:
- SA26HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA26HE3/54.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,513
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Product details
Overview
SA26HE3/54 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features 500 W peak pulse power (10/1000 μs), 26 V stand-off voltage (VWM), 42.1 V maximum clamping voltage at 11.9 A peak pulse current, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA26HE3/54 datasheet, SA26HE3/54 pinout, SA26HE3/54 application, or SA26HE3/54 equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O ports, and DC power rail conditioning where bidirectional clamping and high surge immunity are required.
Technical Context
The SA26HE3/54 operates as a bi-directional avalanche diode with symmetrical breakdown behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable leakage (<1.0 μA at 26 V) and low incremental surge resistance, critical for fast transient response under repetitive surges.
Designed for 10/1000 μs waveform compliance, it delivers 11.9 A peak pulse current with clamping limited to 42.1 V - a 62 % overvoltage margin above VWM. Thermal derating follows a defined curve up to 175 °C junction temperature, supporting operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| 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 downstream voltage stress during worst-case 500 W surge events. |
| PPPM | 500 W - Peak pulse power rating per 10/1000 μs waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| IPPM | 11.9 A - Peak pulse current capability directly supports surge energy absorption without failure. |
| TJ max. | 175 °C - Maximum junction temperature allows deployment in high-ambient automotive and industrial locations. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TC, and HAST. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Matte tin-plated leads, RoHS-compliant, AEC-Q101 qualified (HE3 suffix). No polarity marking - bi-directional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction terminal | Either lead functions identically; no polarity dependency simplifies PCB layout and reduces assembly errors. |
| Case (body) | Non-electrical mechanical structure | UL 94 V-0 rated epoxy housing provides flame resistance and mechanical robustness in harsh environments. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable leakage current (<1.0 μA) and long-term reliability under thermal cycling and humidity exposure. |
| 500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 surge immunity up to 4 kV (open-circuit) in typical interface designs. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor modules requiring zero-failure field performance. |
| Low incremental clamping resistance | Enables tight VC–VBR margin (ΔV = 13.2 V), minimizing overvoltage overshoot during fast-rising transients. |
| DO-204AC (DO-15) package | Industry-standard axial footprint compatible with legacy through-hole assembly and automated taping/reeling (E3/HE3). |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional clamping element placed at connector interface to shunt surge energy before reaching sensitive IC pins. Use Value: Maintains signal integrity by limiting transient voltage to ≤42.1 V while surviving repeated 10/1000 μs surges per AEC-Q101 stress profiles. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC I/O lines, coordinated with series impedance to limit let-through energy. Use Value: Enables >100,000 surge cycles without parameter shift due to glass-passivated junction stability and 175 °C thermal rating. |
| DC Power Rail Conditioning | Telecom Line Interface Protection |
|
Use Scenario: Secondary protection on 24 V or 48 V intermediate distribution rails feeding FPGAs, microcontrollers, and PMICs. IC Role / Device Role / Timing Role: Fast-response shunt device absorbing residual transients that bypass upstream MOVs or filters. Use Value: Clamps within <1 ns to hold rail voltage below IC absolute maximum ratings, preventing latch-up or gate oxide damage. |
Use Scenario: Protecting Ethernet PHYs, RS-485 transceivers, and DSL line drivers from lightning-induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional front-end TVS in series with common-mode chokes to suppress differential and common-mode transients. Use Value: Symmetrical VBR (28.9–31.9 V) ensures balanced clamping on differential pairs without skew or DC bias disruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/54 | Uni-directional; 26 V VWM, 42.1 V VC @ 11.9 A; same DO-214AC package but surface-mount. | Requires polarity-aware layout; unsuitable for AC or floating signals without external biasing. | Select when board space constraints favor SMD and circuit topology guarantees unidirectional voltage polarity. |
| 1.5KE27CA | Higher PPPM (1500 W); 27 V VWM, 43.0 V VC @ 34.7 A; larger DO-201AD package. | Better suited for primary-level surge protection; higher capacitance may affect high-speed signal integrity. | Choose for higher-energy threat environments (e.g., outdoor telecom cabinets) where footprint and layout allow larger case size. |
Compared with SMAJ26A-E3/54 and 1.5KE27CA, the SA26HE3/54 offers AEC-Q101 qualification and axial through-hole mounting in a compact DO-15 form factor - making it optimal for automotive and industrial through-hole assemblies requiring validated reliability and bi-directional symmetry without redesign.
Availability
SA26HE3/54 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and DC power distribution systems requiring stable component supply across multi-year production cycles.
Supply support for SA26HE3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SAxxHE3 series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What is the polarity configuration of the SA26HE3/54?
The SA26HE3/54 is a bi-directional TVS diode with symmetrical avalanche characteristics in both directions. It has no polarity marking on the DO-204AC package, and either lead functions identically - eliminating orientation concerns during PCB assembly and enabling use in AC-coupled or floating signal paths without external biasing. This behavior is confirmed in the datasheet's "Polarity" section and electrical characteristics table for SA26CA variants.
Does the SA26HE3/54 meet automotive qualification standards?
Yes, the SA26HE3/54 is explicitly AEC-Q101 qualified, as noted in the "Notes" section (footnote 1) and "Ordering Information" table of the Vishay document 88378. The HE3 suffix denotes RoHS compliance and AEC-Q101 qualification, validating its use in automotive powertrain, body electronics, and ADAS sensor modules under extended temperature and reliability stress conditions.
What is the maximum clamping voltage of the SA26HE3/54 under surge conditions?
The SA26HE3/54 has a maximum clamping voltage (VC) of 42.1 V at 11.9 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is specified in the "ELECTRICAL CHARACTERISTICS" table for SA26A devices and applies identically to the SA26HE3/54 variant, ensuring predictable overvoltage limiting during standardized surge events.
Can the SA26HE3/54 be used in place of a uni-directional TVS like the SA26A?
No - the SA26HE3/54 is bi-directional (SA26CA family), whereas SA26A is uni-directional. Substituting them requires verifying circuit topology: SA26HE3/54 is appropriate for AC, floating, or polarity-agnostic lines; SA26A requires correct cathode orientation and cannot protect negative-going transients. The datasheet clearly separates CA (bi-directional) and A (uni-directional) suffixes in all parameter tables.
What package type and lead finish does the SA26HE3/54 use?
The SA26HE3/54 uses the DO-204AC (DO-15) axial package with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification, and the leads pass JESD 201 class 2 whisker testing - essential for long-life automotive and industrial deployments.
SA26HE3/54 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- 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)
SA26HE3/54 FAQ
1.How can I place an order for SA26HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA26HE3/54 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 SA26HE3/54 reliable?
The price and inventory of SA26HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA26HE3/54 is usually 5 days.
3.What payment methods are accepted for SA26HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA26HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA26HE3/54?
SA26HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA26HE3/54 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 SA26HE3/54?
For technical support, including SA26HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA26HE3/54 requirements.
6.How does Aetrix verify that SA26HE3/54 is sourced from the original manufacturer or authorized distributors?
All SA26HE3/54 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 SA26HE3/54 meets industry standards.
7.What is the process for return or replacement of SA26HE3/54?
All SA26HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA26HE3/54, 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 SA26HE3/54 part is unused and in its original packaging.
Return procedure for SA26HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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