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

Vishay General Semiconductor - Diodes Division SA24-E3/54

Name: SA24-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA24-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA24-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA24-E3/54.pdf

Description:: TVS DIODE 24VWM 43VC DO204AC

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Product details

Overview

SA24-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 24 V stand-off voltage (V_WM), 26.7–29.5 V breakdown voltage (V_BR) at 1 mA, 38.9 V clamping voltage (V_C) at 12.9 A peak pulse current, 500 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the SA24-E3/54 datasheet, SA24-E3/54 pinout, SA24-E3/54 application, or SA24-E3/54 equivalent, this page delivers verified electrical parameters, polarity marking guidance, thermal derating behavior, clamping performance under surge conditions, and direct-fit alternatives for board-level ESD and load-dump protection in automotive ECUs, industrial sensors, and power supply inputs.

Technical Context

The SA24-E3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient events and low incremental surge resistance. Its unidirectional polarity-marked by a cathode band-ensures proper orientation in series with positive supply rails, where it remains non-conductive below 24 V and clamps sharply above ~27 V.

It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump) when used with appropriate series impedance. Thermal performance is defined up to 175 °C junction temperature, with steady-state power dissipation rated at 3.0 W on infinite heatsink at 75 °C lead temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	24 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 μA; sets upper limit for protected line's nominal DC voltage.
V_BR (min/max)	26.7 V / 29.5 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature conduction during normal operation.
V_C @ I_PPM	38.9 V at 12.9 A (10/1000 μs) - Clamped voltage seen by downstream circuitry during worst-case surge; defines maximum stress on protected ICs.
P_PPM	500 W - Peak transient energy handling capability; supports single-event surges up to 500 W without failure under standard waveform.
I_FSM	70 A - Non-repetitive forward surge rating (10 ms half-sine); enables robustness against inrush or short-circuit transients in power paths.
T_J max.	175 °C - Maximum junction temperature; allows operation in under-hood automotive environments and high-ambient industrial enclosures.
AEC-Q101	Qualified - Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and mechanical shock.

Pinout & Package

SA24-E3/54 uses the DO-204AC (DO-15) axial-leaded package: molded epoxy body, matte tin-plated leads solderable per J-STD-002, RoHS-compliant, and rated UL 94 V-0. Polarity is unidirectional, with cathode denoted by a color band on the case end.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Input/Source side of protected line	Connected toward power source or signal driver; carries full surge current into device during clamping.
Cathode (banded end)	Output/Load side of protected line	Connected toward sensitive load; provides low-impedance path to ground during overvoltage, limiting voltage across load.

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable, repeatable avalanche characteristics over lifetime and temperature; eliminates surface degradation risks in humid environments.
500 W peak pulse power (10/1000 μs)	Supports common automotive and industrial surge standards without external derating; handles ISO 7637-2 Pulse 5a (load dump) up to 12 V systems.
AEC-Q101 qualification	Validates suitability for automotive control modules, body electronics, and ADAS sensor interfaces requiring long-term field reliability.
Low clamping ratio (V_C/V_BR ≈ 1.4)	Minimizes voltage overshoot during clamping-critical for protecting 3.3 V or 5 V logic rails downstream of LDOs or DC/DC converters.
Solder dip rated 275 °C for 10 s	Ensures compatibility with lead-free reflow profiles and manual repair processes without delamination or parameter shift.

Applications

Automotive Engine Control Unit (ECU) Power Input	Industrial PLC Digital Input Module
Use Scenario: Protecting 12 V battery-supplied microcontroller power rail against load dump transients up to +35 V and reverse battery connection. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input fuse and bulk capacitor, acting as first-line clamp to limit voltage seen by downstream regulators and MCU. Use Value: Clamps to ≤38.9 V within nanoseconds, preventing damage to 40 V-rated input LDOs and ensuring system reset instead of latch-up during ISO 7637-2 Pulse 5a events.	Use Scenario: Shielding 24 V digital input channels from inductive kickback generated by solenoid or relay coils switching in factory automation. IC Role / Device Role / Timing Role: Series-connected TVS on each input channel, referenced to common ground, absorbing repetitive 400 V/1 A transients induced by coil de-energization. Use Value: Withstands >1000 surges at rated IPPM while maintaining V_WM stability, eliminating need for external varistors or RC snubbers in DIN-rail mounted I/O modules.
Telecom Remote Radio Head (RRH) DC Feed Line	Consumer Smart Appliance Motor Driver Board
Use Scenario: Safeguarding 48 V DC power feed entering outdoor base station radios from lightning-induced surges on tower-mounted cabling. IC Role / Device Role / Timing Role: Primary TVS on main DC input before DC/DC isolation stage, coordinated with secondary TVS and gas discharge tube (GDT) for staged protection. Use Value: Fast response and low V_C preserve integrity of isolated gate drivers and ADC references, reducing false-triggering in RF front-end bias circuits.	Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards operating from 24 V internal supply. IC Role / Device Role / Timing Role: Mounted across motor terminals and across H-bridge high-side FET source-drain, clamping inductive flyback during PWM switching. Use Value: 70 A I_FSM rating tolerates repeated motor stall currents; DO-15 package fits tight layout constraints near motor connectors without thermal vias.

Automotive Engine Control Unit (ECU) Power Input

Industrial PLC Digital Input Module

Use Scenario: Protecting 12 V battery-supplied microcontroller power rail against load dump transients up to +35 V and reverse battery connection.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between input fuse and bulk capacitor, acting as first-line clamp to limit voltage seen by downstream regulators and MCU.

Use Value: Clamps to ≤38.9 V within nanoseconds, preventing damage to 40 V-rated input LDOs and ensuring system reset instead of latch-up during ISO 7637-2 Pulse 5a events.

Use Scenario: Shielding 24 V digital input channels from inductive kickback generated by solenoid or relay coils switching in factory automation.

IC Role / Device Role / Timing Role: Series-connected TVS on each input channel, referenced to common ground, absorbing repetitive 400 V/1 A transients induced by coil de-energization.

Use Value: Withstands >1000 surges at rated IPPM while maintaining V_WM stability, eliminating need for external varistors or RC snubbers in DIN-rail mounted I/O modules.

Telecom Remote Radio Head (RRH) DC Feed Line

Consumer Smart Appliance Motor Driver Board

Use Scenario: Safeguarding 48 V DC power feed entering outdoor base station radios from lightning-induced surges on tower-mounted cabling.

IC Role / Device Role / Timing Role: Primary TVS on main DC input before DC/DC isolation stage, coordinated with secondary TVS and gas discharge tube (GDT) for staged protection.

Use Value: Fast response and low V_C preserve integrity of isolated gate drivers and ADC references, reducing false-triggering in RF front-end bias circuits.

Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards operating from 24 V internal supply.

IC Role / Device Role / Timing Role: Mounted across motor terminals and across H-bridge high-side FET source-drain, clamping inductive flyback during PWM switching.

Use Value: 70 A I_FSM rating tolerates repeated motor stall currents; DO-15 package fits tight layout constraints near motor connectors without thermal vias.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ24A-E3/57	Same V_WM (24 V), identical DO-214AC (SMA) package; slightly higher V_C (43.5 V @ 11.6 A), lower P_PPM (400 W).	Surface-mount alternative for automated assembly; requires PCB footprint change and lacks axial lead mechanical strain relief.	Select when space-constrained PCBs demand SMT placement and thermal mass is managed via copper pour.
1.5KE24A	Higher P_PPM (1500 W), larger DO-201AD package; same V_WM/V_BR range but slower response due to higher junction capacitance (~100 pF vs. ~30 pF).	Better suited for high-energy AC line protection; less ideal for fast digital signal lines due to capacitive loading.	Choose for legacy through-hole designs needing higher surge margin where layout area permits larger case and timing sensitivity is low.

Compared with SMAJ24A-E3/57 and 1.5KE24A, SA24-E3/54 offers optimal balance of axial-mount ruggedness, AEC-Q101 validation, and low-clamp performance in compact DO-15 form-making it preferred for new automotive and industrial designs prioritizing reliability and surge fidelity over raw power rating or SMT density.

Availability

SA24-E3/54 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and telecom remote radio head power supplies requiring stable component supply, long-lifecycle assurance, and AEC-Q101 compliance.

Supply support for SA24-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 application-specific optimization.

The SAxxA series is engineered for robust transient suppression in harsh environments-targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising signal integrity or thermal stability.

FAQ

What is the polarity configuration of SA24-E3/54?

The SA24-E3/54 is a unidirectional Transient Voltage Suppressor with cathode indicated by a color band on the case. It conducts only in reverse-bias avalanche mode during overvoltage events and blocks forward current like a standard rectifier diode. This polarity must be observed during PCB layout to ensure correct clamping direction relative to the protected line's ground reference.

Does SA24-E3/54 meet automotive qualification standards?

Yes, SA24-E3/54 is AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and mechanical shock. This qualification confirms its suitability for use in automotive electronic control units, body modules, and ADAS sensor interfaces where long-term reliability under thermal and vibration stress is mandatory.

What is the maximum clamping voltage of SA24-E3/54 under surge conditions?

The SA24-E3/54 exhibits a maximum clamping voltage (V_C) of 38.9 V when subjected to a 10/1000 μs peak pulse current of 12.9 A. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events-critical for ensuring downstream ICs rated for ≤40 V operation remain within safe operating limits.

Can SA24-E3/54 be used in bi-directional protection applications?

No, SA24-E3/54 is strictly unidirectional and lacks symmetrical breakdown characteristics. For bi-directional protection-such as AC signal lines or differential buses-Vishay's SA24CA variant (with CA suffix) must be selected. Using SA24-E3/54 in reverse-biased AC configurations risks permanent failure due to forward conduction during negative half-cycles.

What is the thermal derating behavior of SA24-E3/54 above 25 °C ambient?

SA24-E3/54 follows a linear derating curve for peak pulse power above 25 °C ambient, dropping to ~75 % of 500 W at 75 °C and ~50 % at 125 °C (per Fig. 2 in datasheet 88378). Steady-state power dissipation (P_D = 3.0 W) also derates linearly from 75 °C lead temperature downward, reaching zero at 175 °C junction temperature-requiring thermal design consideration in enclosed or high-ambient environments.

SA24-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):: 24V

Voltage - Breakdown (Min):: 26.7V

Voltage - Clamping (Max) @ Ipp:: 43V

Current - Peak Pulse (10/1000µs):: 11.6A

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)

SA24-E3/54 FAQ

1.How can I place an order for SA24-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA24-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 SA24-E3/54 reliable?

The price and inventory of SA24-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 SA24-E3/54 is usually 5 days.

3.What payment methods are accepted for SA24-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA24-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA24-E3/54?

SA24-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA24-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 SA24-E3/54?

For technical support, including SA24-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA24-E3/54 requirements.

6.How does Aetrix verify that SA24-E3/54 is sourced from the original manufacturer or authorized distributors?

All SA24-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 SA24-E3/54 meets industry standards.

7.What is the process for return or replacement of SA24-E3/54?

All SA24-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA24-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 SA24-E3/54 part is unused and in its original packaging.

Return procedure for SA24-E3/54:

1.Submit a request within 90 days.

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

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