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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division SA26-E3/54

Name: SA26-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA26-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA26-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SA26-E3/54.pdf

Description:: TVS DIODE 26VWM 46.6VC DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:5,378

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Product details

Overview

SA26-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 26 V stand-off voltage (V_WM), 28.9–31.9 V breakdown voltage (V_BR) at 1.0 mA, 42.1 V maximum clamping voltage (V_C) at 11.9 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supplies, industrial I/O interfaces, and MOSFET gate protection circuits.

For engineers reviewing the SA26-E3/54 datasheet, SA26-E3/54 pinout, SA26-E3/54 application, or SA26-E3/54 equivalent, this device is evaluated for fast-response transient suppression in 24 V systems, reverse-polarity tolerant designs, and AEC-Q101 qualified environments where low clamping ratio and stable thermal derating are critical.

Technical Context

The SA26-E3/54 operates as a silicon avalanche diode with glass-passivated junction, delivering bidirectional surge immunity only in CA variants - this E3-suffixed part is unidirectional, with cathode marked by color band. Its clamping behavior follows standardized 10/1000 µs impulse response, exhibiting <30 ns typical response time and low incremental surge resistance to limit voltage overshoot during ESD or inductive switching events.

Thermal performance is defined by 175 °C max junction temperature, 3.0 W steady-state power dissipation on infinite heatsink at 75 °C lead temperature, and derating per Fig. 2 above 25 °C ambient. It complies with JESD 22-B106 (275 °C solder dip, 10 s) and JESD 201 Class 1A whisker resistance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	26 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected line voltage.
V_BR (min/max)	28.9 V / 31.9 V at 1.0 mA - Confirmed breakdown threshold range; ensures reliable triggering above nominal rail.
V_C @ I_PPM	42.1 V at 11.9 A - Clamped voltage during 500 W transient; determines worst-case stress on downstream ICs.
P_PPM	500 W - Peak pulse power handling with 10/1000 µs waveform; defines surge energy absorption capability.
I_FSM	70 A - Non-repetitive forward surge current (10 ms half-sine); supports high-energy load dump survival.
T_J max	175 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures.
Package	DO-204AC (DO-15) - Standard axial-leaded package with UL 94 V-0 molded epoxy; compatible with through-hole reflow and wave soldering.

Pinout & Package

DO-204AC (DO-15) package: axial-leaded, cylindrical epoxy body, 0.140" (3.6 mm) diameter, 1.0" (25.4 mm) minimum overall length. Cathode identified by color band on one end.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / Reverse voltage reference node	Connected to lower-potential side of protected circuit (e.g., ground or return path).
Cathode	Avalanche conduction terminal / Clamping output	Connected to higher-potential line (e.g., 24 V rail); color-banded end carries clamped transient current to ground.

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress.
500 W peak pulse power (10/1000 µs)	Supports protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges without degradation.
AEC-Q101 qualified (E3 suffix variant)	Validated for automotive powertrain and chassis applications requiring zero defect field performance.
Low clamping ratio (V_C/V_BR ≈ 1.38)	Minimizes overvoltage margin between trigger and clamp, reducing stress on 30 V-rated MOSFETs and controllers.
Matte tin-plated leads	Ensures solderability per J-STD-002 and JESD 22-B102; eliminates intermetallic growth concerns in high-volume assembly.

Applications

Automotive Power Supply Protection	Industrial PLC Digital I/O Protection
Use Scenario: Suppresses load dump transients (up to 60 V, 100 ms) in 24 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Limits peak voltage to 42.1 V during 11.9 A surge, preventing damage to 40 V-input buck controllers.	Use Scenario: Shields 24 V digital input modules from inductive kickback when solenoids or relays de-energize. IC Role / Device Role / Timing Role: Front-end clamping device on optocoupler input side, referenced to common ground. Use Value: Responds in <30 ns to clamp 500 W spikes, preserving signal integrity and extending optocoupler lifetime.
MOSFET Gate Protection	Telecom Line Interface Protection
Use Scenario: Guards N-channel high-side MOSFET gates against V_GS overstress during hot-swap or supply sequencing. IC Role / Device Role / Timing Role: Low-capacitance TVS tied between gate and source, with cathode to gate. Use Value: Clamps gate-source voltage to ≤42.1 V while adding <100 pF capacitance - no signal delay penalty.	Use Scenario: Protects RS-485 transceiver inputs on outdoor base station backhaul links exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair, mounted before common-mode choke. Use Value: Handles 500 W common-mode transients without latch-up, maintaining ±12 V data window compliance.

Automotive Power Supply Protection

Industrial PLC Digital I/O Protection

Use Scenario: Suppresses load dump transients (up to 60 V, 100 ms) in 24 V vehicle electrical systems.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input.

Use Value: Limits peak voltage to 42.1 V during 11.9 A surge, preventing damage to 40 V-input buck controllers.

Use Scenario: Shields 24 V digital input modules from inductive kickback when solenoids or relays de-energize.

IC Role / Device Role / Timing Role: Front-end clamping device on optocoupler input side, referenced to common ground.

Use Value: Responds in <30 ns to clamp 500 W spikes, preserving signal integrity and extending optocoupler lifetime.

MOSFET Gate Protection

Telecom Line Interface Protection

Use Scenario: Guards N-channel high-side MOSFET gates against V_GS overstress during hot-swap or supply sequencing.

IC Role / Device Role / Timing Role: Low-capacitance TVS tied between gate and source, with cathode to gate.

Use Value: Clamps gate-source voltage to ≤42.1 V while adding <100 pF capacitance - no signal delay penalty.

Use Scenario: Protects RS-485 transceiver inputs on outdoor base station backhaul links exposed to lightning-induced surges.

IC Role / Device Role / Timing Role: Primary-level TVS on differential pair, mounted before common-mode choke.

Use Value: Handles 500 W common-mode transients without latch-up, maintaining ±12 V data window compliance.

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	Same DO-214AC (SMA) package; 26 V V_WM, 42.1 V V_C @ 11.9 A, but 400 W P_PPM.	Lower peak power rating limits suitability for ISO 7637-2 Pulse 5a; better for space-constrained PCBs.	Select SMAJ26A when board area is constrained and surge energy is limited to ≤400 W.
1.5KE27A	DO-201AD package; 27 V V_WM, 43.0 V V_C @ 11.6 A, 1500 W P_PPM, higher I_FSM (200 A).	Higher surge capacity suits heavy-duty industrial motor drives; larger footprint and higher leakage (5 µA).	Choose 1.5KE27A for legacy 1500 W surge requirements where DO-201AD mounting is acceptable.

Compared with SMAJ26A and 1.5KE27A, SA26-E3/54 delivers optimal balance of AEC-Q101 qualification, 500 W surge handling, and DO-15 manufacturability - making it preferred for new automotive and industrial designs requiring validated reliability and standard through-hole assembly.

Availability

SA26-E3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial programmable logic controller (PLC) I/O modules, and telecom line interface protection requiring stable component supply across multi-year production cycles.

Supply support for SA26-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, efficiency, and automotive-grade validation.

The SAxx series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial control, and telecommunications infrastructure.

FAQ

What is the polarity configuration of SA26-E3/54?

The SA26-E3/54 is a unidirectional Transient Voltage Suppressor diode, with cathode identified by a color band on the package. It conducts only in reverse bias during overvoltage events and blocks forward current up to 3.5 V at 100 A, making it suitable for DC rail protection where polarity is fixed and known.

Is SA26-E3/54 qualified for automotive applications?

Yes, SA26-E3/54 is AEC-Q101 qualified per the Vishay datasheet (Document Number: 88378, Revision: 18-Sep-12). This qualification confirms its suitability for automotive powertrain, body electronics, and chassis systems where reliability under thermal cycling, vibration, and surge stress is mandatory.

What is the maximum clamping voltage of SA26-E3/54 under surge conditions?

The SA26-E3/54 has a maximum clamping voltage (V_C) of 42.1 V at 11.9 A peak pulse current (I_PPM) with a 10/1000 µs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during a 500 W transient event.

Can SA26-E3/54 be used in bi-directional protection circuits?

No - SA26-E3/54 is unidirectional. For bi-directional protection, Vishay specifies the CA-suffixed variant (e.g., SA26CA), which exhibits symmetrical breakdown in both directions and lacks polarity marking. Using SA26-E3/54 in AC or reversible-polarity circuits will result in forward conduction and failure.

What is the lead finish and solderability specification for SA26-E3/54?

SA26-E3/54 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 for solderability. It withstands solder dip at 275 °C for up to 10 seconds per JESD 22-B106, and meets JESD 201 Class 1A whisker resistance, ensuring long-term joint integrity in automated assembly.

SA26-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:: 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-E3/54 FAQ

1.How can I place an order for SA26-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA26-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 SA26-E3/54 reliable?

The price and inventory of SA26-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 SA26-E3/54 is usually 5 days.

3.What payment methods are accepted for SA26-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA26-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA26-E3/54?

SA26-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA26-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 SA26-E3/54?

For technical support, including SA26-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA26-E3/54 requirements.

6.How does Aetrix verify that SA26-E3/54 is sourced from the original manufacturer or authorized distributors?

All SA26-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 SA26-E3/54 meets industry standards.

7.What is the process for return or replacement of SA26-E3/54?

All SA26-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA26-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 SA26-E3/54 part is unused and in its original packaging.

Return procedure for SA26-E3/54:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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