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Vishay General Semiconductor - Diodes Division SA26-E3/73
- Part No.:
- SA26-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA26-E3/73.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,560
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Product details
Overview
SA26-E3/73 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR), and 500 W peak pulse power (10/1000 μs). It clamps transients to ≤42.1 V at 11.9 A peak pulse current and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SA26-E3/73 datasheet, SA26-E3/73 pinout, SA26-E3/73 application, or SA26-E3/73 equivalent, this device is selected for robust overvoltage protection on DC power rails, I/O lines, and MOSFET gate drivers where fast response (<1 ns), low clamping ratio, and high surge reliability are required.
Technical Context
The SA26-E3/73 operates as a uni-directional avalanche diode with glass-passivated junction, delivering precise voltage clamping during transient events. Its 26 V stand-off rating ensures compatibility with 24 V nominal systems, while its 28.9–31.9 V VBR range at 10 mA test current enables tight tolerance control under surge conditions.
Designed for repetitive 10/1000 μs waveform surges up to 500 W (0.01% duty cycle), it exhibits 3.5 V max forward voltage at 100 A and supports operating junction temperatures from –55 °C to +175 °C - enabling deployment in under-hood automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse working voltage before clamping begins; matches 24 V system rails with 8% margin |
| VBR (min/max) | 28.9 V / 31.9 V at 10 mA - defines reliable avalanche onset window for predictable clamping behavior |
| VC @ IPPM | 42.1 V at 11.9 A - clamping voltage under full 500 W surge; yields clamping ratio of 1.62×VWM |
| IPPM | 11.9 A - peak pulse current capability with 10/1000 μs waveform; determines minimum series impedance for safe operation |
| PPPM | 500 W - peak pulse power handling per single transient; validated for repetitive surges at ≤0.01% duty cycle |
| TJ max | +175 °C - maximum junction temperature; supports placement near heat sources in engine control units |
| Leakage ID | 1.0 μA at 26 V - ultra-low reverse leakage preserves battery life in always-on automotive modules |
Pinout & Package
SA26-E3/73 uses the DO-204AC (DO-15) axial-leaded package: molded epoxy body, matte tin-plated leads solderable per J-STD-002, RoHS-compliant, and qualified to JESD 201 Class 1A whisker test. Polarity is marked by cathode band; anode and cathode terminals are unambiguous for PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during positive transients |
| Cathode | High-side clamping terminal | Connected to protected line (e.g., 24 V rail); conducts avalanche current into ground when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 500 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1/2a/5a surges without degradation in automotive ECUs |
| AEC-Q101 qualification | Validated for automotive-grade temperature cycling, mechanical shock, and HTRB lifetime testing |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive switch-off in solenoid drivers) |
| Matte tin-plated leads | Ensures consistent solder wetting and intermetallic formation across reflow and wave soldering processes |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between battery rail and downstream DC/DC converter input. Use Value: Limits transient excursions to ≤42.1 V, preventing damage to 40 V-rated input capacitors and controller ICs. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on differential or single-ended signal lines entering microcontroller ADC inputs. Use Value: Sub-1 ns response time suppresses >8 kV contact ESD (IEC 61000-4-2) without distorting mV-level sensor signals. |
| MOSFET Gate Driver Protection | Telecom DC Power Input Protection |
Use Scenario: Safeguarding high-side N-channel MOSFET gate drive circuits from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Clamping diode connected between gate and source, limiting VGS to safe levels during switching transitions. Use Value: 3.5 V max forward voltage at 100 A ensures minimal impact on turn-on speed while blocking destructive gate overvoltage. | Use Scenario: Front-end surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line TVS in series with fuse and filter choke on primary DC distribution bus. Use Value: 500 W rating handles 10/1000 μs surges up to 11.9 A, meeting Telcordia GR-1089-CORE Level 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/5T | Same VWM (26 V), but SMA package (SMT); lower IPPM (11.3 A), same PPPM (400 W) | Requires PCB rework for surface-mount layout; better suited for space-constrained consumer boards | Select for automated assembly and compact designs where axial leaded footprint is unacceptable |
| 1.5KE27A | Higher VWM (27 V), larger DO-201 package; identical VBR range and PPPM (500 W), but higher leakage (5 μA) | Compatible with legacy through-hole layouts using larger pad spacing; less suitable for AEC-Q101-critical automotive use | Choose when upgrading older designs with DO-201 footprints and where AEC-Q101 is not mandated |
Compared with SMAJ26A-E3/5T and 1.5KE27A, the SA26-E3/73 offers AEC-Q101 qualification, lower leakage (1.0 μA vs. 5 μA), and DO-15 mechanical robustness ideal for high-vibration automotive harness connections - making it the preferred choice for new automotive power rail designs.
Availability
SA26-E3/73 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and telecom DC power supplies requiring stable component supply, long-lifecycle assurance, and traceable sourcing.
Supply support for SA26-E3/73 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 power efficiency.
The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh-environment applications including automotive, industrial automation, and telecommunications infrastructure.
FAQ
What is the breakdown voltage range of the SA26-E3/73?
The SA26-E3/73 has a guaranteed breakdown voltage (VBR) range of 28.9 V to 31.9 V at 10 mA test current, measured per ANSI/IEEE C62.35. This tight 10.4% spread ensures consistent clamping performance across production lots and supports design margining for 24 V system overvoltage events. The SA26-E3/73 maintains this specification across its full operating temperature range.
Is the SA26-E3/73 suitable for automotive applications?
Yes - the SA26-E3/73 is explicitly AEC-Q101 qualified, tested for temperature cycling, highly accelerated life testing (HALT), and mechanical shock per automotive standards. Its DO-204AC package, 175 °C max junction temperature, and 1.0 μA leakage at 26 V make it appropriate for under-hood engine control, body electronics, and ADAS power domains. The SA26-E3/73 meets critical reliability requirements for automotive OEM Tier 1 suppliers.
What is the clamping voltage of the SA26-E3/73 at its rated peak pulse current?
The SA26-E3/73 clamps to a maximum of 42.1 V at its rated peak pulse current (IPPM) of 11.9 A under the standard 10/1000 μs waveform. This clamping voltage is measured per JEDEC test conditions and represents the worst-case voltage seen by downstream circuitry during a full 500 W transient event. The SA26-E3/73 achieves a clamping ratio of 1.62×VWM, confirming effective energy diversion.
Does the SA26-E3/73 have polarity marking, and how is it oriented in circuit?
Yes - the SA26-E3/73 features a cathode band (color stripe) on the DO-204AC body, identifying the cathode terminal. In uni-directional configuration, the cathode connects to the protected line (e.g., 24 V rail), and the anode connects to ground. This orientation allows the SA26-E3/73 to conduct only during positive overvoltage events, blocking reverse leakage while providing low-impedance shunt during transients.
What is the maximum steady-state power dissipation for the SA26-E3/73?
The SA26-E3/73 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C, per Figure 5 in the datasheet. This rating applies to continuous DC or low-frequency AC stress - not transient suppression. For normal TVS operation, power dissipation remains negligible; the 3.0 W limit governs fault-mode or sustained overvoltage scenarios where the SA26-E3/73 may enter thermal runaway.
SA26-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA26-E3/73 FAQ
1.How can I place an order for SA26-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA26-E3/73 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 SA26-E3/73 reliable?
The price and inventory of SA26-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA26-E3/73 is usually 5 days.
3.What payment methods are accepted for SA26-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA26-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA26-E3/73?
SA26-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA26-E3/73 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 SA26-E3/73?
For technical support, including SA26-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA26-E3/73 requirements.
6.How does Aetrix verify that SA26-E3/73 is sourced from the original manufacturer or authorized distributors?
All SA26-E3/73 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 SA26-E3/73 meets industry standards.
7.What is the process for return or replacement of SA26-E3/73?
All SA26-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA26-E3/73, 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 SA26-E3/73 part is unused and in its original packaging.
Return procedure for SA26-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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