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Vishay General Semiconductor - Diodes Division SA26A-E3/54
- Part No.:
- SA26A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA26A-E3/54.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,403
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Product details
Overview
SA26A-E3/54 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 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 42.1 V clamping voltage (VC) at 11.9 A peak pulse current, 500 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA26A-E3/54 datasheet, SA26A-E3/54 pinout, SA26A-E3/54 application, or SA26A-E3/54 equivalent, this page delivers verified electrical parameters, DO-15 terminal polarity mapping, bidirectional vs. unidirectional distinction, clamping performance under standardized surge waveforms, and validated automotive-grade alternatives.
Technical Context
The SA26A-E3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient overvoltages. Its unidirectional polarity-marked by cathode band-supports DC-biased protection paths, while its 175 °C maximum junction temperature and 3.0 W steady-state power dissipation support high-reliability industrial and automotive environments.
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive surge) when applied per layout guidelines. The device's low incremental surge resistance and 9.2 mV/°C VBR temperature coefficient ensure stable clamping across operating temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC bias margin. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 42.1 V at 11.9 A (10/1000 μs) - Clamped voltage seen by protected IC/MOSFET during worst-case surge. |
| PPPM | 500 W - Peak transient energy absorption capability without failure; rated per standard waveform. |
| IFSM | 70 A - Non-repetitive forward surge rating; supports inrush or fault-current events in power rails. |
| TJ max. | +175 °C - Enables operation in under-hood automotive or high-ambient industrial locations. |
| Polarity | Unidirectional - Cathode-band marked; used in DC circuits where reverse conduction must be blocked. |
Pinout & Package
SA26A-E3/54 uses the DO-15 (DO-204AC) axial-leaded package: 3.3–3.5 mm diameter, 6.15–6.55 mm body length, matte tin-plated leads compliant with J-STD-002 solderability. Polarity is indicated by a color band denoting the cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry / Surge return path | Connected to ground or low-impedance return in unidirectional clamp configuration. |
| Cathode (banded end) | Reverse-biased protection node | Connected to protected line (e.g., 24 V rail); conducts only during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche behavior and long-term reliability under repetitive surges. |
| 500 W peak pulse power (10/1000 μs) | Withstands automotive load-dump and inductive switching transients without degradation. |
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot on protected nodes, reducing risk of downstream IC latch-up or damage. |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation suitable for enclosed industrial enclosures. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in vehicle ECUs from ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3a/b (line dump). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp transients before LDO or DC/DC stage. Use Value: Limits voltage to ≤42.1 V during 11.9 A surge, preventing regulator shutdown or MOSFET gate oxide rupture. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in PLC modules from field-wiring ESD and cable-coupled noise. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point to shunt fast transients before signal conditioning op-amps. Use Value: Sub-1 ns response captures ESD events before they propagate; 26 V VWM avoids interference with 20 V sensor full-scale range. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding Ethernet PHY power pins and data lines in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 3.3 V/5 V bias rails feeding PHY ICs, coordinated with secondary GDT or polymer PTC. Use Value: 500 W rating handles multi-kV induced surges; DO-15 form factor allows manual rework and high-voltage creepage spacing. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge FET drains to clamp inductive kickback during PWM commutation. Use Value: 70 A IFSM withstands repeated motor stall currents; 175 °C TJ rating survives enclosed thermal environments near motors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/5T | Same VWM (26 V), DO-214AC (SMA) package, 400 W PPPM, lower IFSM (40 A) | Surface-mount alternative; requires PCB rework; less robust for high-energy surges | Choose for space-constrained layouts where DO-15 axial leads are impractical. |
| 1.5KE27A | Higher PPPM (1500 W), DO-201AD package, same VWM (26 V), higher VC (43.5 V) | Higher surge capacity but larger footprint and higher clamping; not AEC-Q101 qualified | Choose for non-automotive industrial systems requiring >500 W surge margin. |
Compared with SMAJ26A-E3/5T and 1.5KE27A, the SA26A-E3/54 offers AEC-Q101 qualification and optimal balance of 500 W surge handling, 42.1 V clamping, and DO-15 through-hole manufacturability for automotive and ruggedized designs.
Availability
SA26A-E3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply, RoHS compliance, and AEC-Q101 traceability.
Supply support for SA26A-E3/54 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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-power handling.
The SAxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust, standardized transient suppression in automotive, industrial, and communications infrastructure where repeatable clamping and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SA26A-E3/54 and how is it measured?
The SA26A-E3/54 has a maximum clamping voltage (VC) of 42.1 V, measured at 11.9 A peak pulse current using the standardized 10/1000 μs double-exponential surge waveform. This value represents the highest voltage imposed on the protected circuit during a worst-case transient event, and is confirmed per JEDEC test conditions in the official Vishay datasheet (Doc. #88378, Rev. 27-Sep-2021). The SA26A-E3/54 maintains this clamping performance across its full operating temperature range.
Is SA26A-E3/54 suitable for automotive applications?
Yes, SA26A-E3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction-including glass-passivated junction, 175 °C maximum junction temperature, and compliance with ISO 7637-2 transient immunity requirements-makes it appropriate for engine control units, body electronics, and infotainment power rails. The "E3" suffix denotes RoHS-compliant commercial grade, and the full SA26A-E3/54 part number appears in Vishay's AEC-Q101 certified product list referenced in Doc. #88378.
How does SA26A-E3/54 differ from bidirectional variants like SA26CA?
The SA26A-E3/54 is unidirectional and features a cathode band for polarity identification, allowing it to block reverse current while clamping positive transients on DC lines. In contrast, SA26CA is bidirectional, has no polarity marking, and clamps transients of either polarity-making it suitable for AC signal lines or floating buses. Their VBR, VC, and PPPM values are identical, but SA26A-E3/54 cannot replace SA26CA in AC-coupled applications without circuit redesign.
What is the lead finish and solderability specification for SA26A-E3/54?
The SA26A-E3/54 features matte tin-plated leads compliant with J-STD-002 (solderability) and JESD 22-B102 (surface mount solderability). It supports solder dipping up to 275 °C for 10 seconds per JESD 22-B106, and passes JESD 201 Class 1A whisker testing. These specifications ensure reliable through-hole assembly and long-term interconnect integrity in high-reliability production environments.
Can SA26A-E3/54 be used in parallel for higher surge current handling?
No-SA26A-E3/54 is not characterized or recommended for parallel operation. Mismatched VBR tolerances (28.9–31.9 V) cause current imbalance during surges, risking thermal runaway in one device. For higher energy handling, select a single higher-rated part (e.g., SA30A or 1.5KE27A) or implement staged protection with upstream GDTs. Vishay's datasheet does not specify derating curves or matching guidance for paralleling SA26A-E3/54 units.
SA26A-E3/54 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA26A-E3/54 FAQ
1.How can I place an order for SA26A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA26A-E3/54 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 SA26A-E3/54 reliable?
The price and inventory of SA26A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA26A-E3/54 is usually 5 days.
3.What payment methods are accepted for SA26A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA26A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA26A-E3/54?
SA26A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA26A-E3/54 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 SA26A-E3/54?
For technical support, including SA26A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA26A-E3/54 requirements.
6.How does Aetrix verify that SA26A-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA26A-E3/54 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 SA26A-E3/54 meets industry standards.
7.What is the process for return or replacement of SA26A-E3/54?
All SA26A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA26A-E3/54, 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 SA26A-E3/54 part is unused and in its original packaging.
Return procedure for SA26A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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