Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Vishay General Semiconductor - Diodes Division SA24HE3/73

Name: SA24HE3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA24HE3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SA24HE3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA24HE3/73.pdf

Description:: TVS DIODE 24VWM 43VC DO204AC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,504

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SA24HE3/73 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping inductive load transients and ESD events on power rails and signal lines. It features 24 V stand-off voltage (V_WM), 26.7–29.5 V breakdown voltage (V_BR) at 1 mA, 500 W peak pulse power (10/1000 µs), 12.9 A peak pulse current (I_PPM), and 38.9 V maximum clamping voltage (V_C) - used in automotive body control modules and industrial PLC I/O protection.

For engineers reviewing the SA24HE3/73 datasheet, SA24HE3/73 pinout, SA24HE3/73 application, or SA24HE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-15 mechanical dimensions, thermal derating curves, and direct alternatives with documented clamping and leakage differences.

Technical Context

The SA24HE3/73 operates as a silicon avalanche diode with glass-passivated junction, optimized for fast response (<1 ps) to transient overvoltages. Its uni-directional polarity uses a cathode band marking, and it complies with JEDEC JESD22-B102 solderability and JESD201 Class 2 whisker resistance requirements.

It delivers 3.0 W steady-state power dissipation at T_L = 75 °C, supports 70 A non-repetitive forward surge (IFSM), and maintains stable clamping up to 175 °C junction temperature - enabling use in under-hood automotive environments and high-temperature industrial enclosures without derating penalties beyond published curves.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	24 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin below system rail voltage.
V_BR (min/max)	26.7 V / 29.5 V at I_T = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients.
V_C @ I_PPM	38.9 V at 12.9 A (10/1000 µs) - Clamped voltage seen by protected circuit; defines worst-case stress on downstream ICs.
I_PPM	12.9 A - Peak surge current capability under standard waveform; determines survivability against ISO 7637-2 Pulse 1/2a/5a events.
P_PPM	500 W - Peak pulse power rating; validates suitability for 12 V automotive supply line protection per SAE J1113-11.
T_J max.	175 °C - Maximum junction temperature; enables operation in engine bay or industrial motor drive cabinets without forced cooling.
I_D @ V_WM	1.0 µA - Reverse leakage at rated stand-off; ensures negligible standby current draw in battery-powered systems.

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Cathode indicated by color band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / transient return path	Connected to ground or low-impedance return plane; completes clamping loop during positive transients.
Cathode	Reverse-biased terminal / protected line connection	Connected to the line being protected (e.g., 24 V supply rail); conducts only when V_KA exceeds V_BR.

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable, repeatable avalanche characteristics across temperature and lifetime; eliminates surface degradation under humidity bias stress.
AEC-Q101 qualified	Validated for automotive applications including powertrain, chassis, and body electronics per stress test requirements (HTOL, TC, HTRB, etc.).
500 W peak pulse power (10/1000 µs)	Withstands repetitive load dump surges in 24 V commercial vehicle systems without parameter shift or failure.
Low incremental surge resistance	Minimizes V_C – V_BR differential (ΔV_C = 12.2 V), reducing voltage overshoot stress on protected MOSFETs and microcontrollers.
JESD 201 Class 2 whisker resistance	Prevents tin whisker growth under thermal cycling and long-term storage - critical for aerospace and medical-grade reliability programs.

Applications

Automotive Body Control Module (BCM)	Industrial PLC Digital Input Protection
Use Scenario: Protecting 24 V sensor supply lines in BCM against ISO 7637-2 Pulse 3b (capacitive coupling) and load dump-induced spikes. IC Role / Device Role / Timing Role: Uni-directional TVS clamp placed between 24 V rail and ground, conducting only during overvoltage events. Use Value: Limits transient voltage to ≤38.9 V, preventing latch-up or gate oxide damage in connected LIN transceivers and Hall-effect sensors.	Use Scenario: Shielding 24 V DC digital input channels of modular PLCs from relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Primary overvoltage suppression device mounted at connector interface, upstream of optocoupler input stage. Use Value: Absorbs 500 W surges without degradation, maintaining <1 µA leakage to preserve input threshold accuracy and reduce false triggering.
Telecom Power Supply Surge Protection	Medical Equipment Power Entry Filtering
Use Scenario: Secondary-level clamping on 24 V telecom rectifier outputs exposed to lightning-induced surges per IEC 61000-4-5 Level 3 (1 kV/2 Ω). IC Role / Device Role / Timing Role: Fast-response shunt protector working in coordination with MOVs and common-mode chokes. Use Value: Responds in <1 ps to limit let-through energy, reducing stress on downstream DC/DC converters and PMICs.	Use Scenario: Safeguarding isolated 24 V auxiliary power rails in diagnostic imaging equipment against ESD and defibrillator discharge coupling. IC Role / Device Role / Timing Role: RoHS-compliant, halogen-free TVS placed at front-end power entry with traceable sourcing. Use Value: Meets IEC 60601-1 creepage/clearance requirements via DO-15 package geometry and 175 °C TJ rating for sterilization-cycle thermal resilience.

Automotive Body Control Module (BCM)

Industrial PLC Digital Input Protection

Use Scenario: Protecting 24 V sensor supply lines in BCM against ISO 7637-2 Pulse 3b (capacitive coupling) and load dump-induced spikes.

IC Role / Device Role / Timing Role: Uni-directional TVS clamp placed between 24 V rail and ground, conducting only during overvoltage events.

Use Value: Limits transient voltage to ≤38.9 V, preventing latch-up or gate oxide damage in connected LIN transceivers and Hall-effect sensors.

Use Scenario: Shielding 24 V DC digital input channels of modular PLCs from relay coil flyback and field wiring ESD.

IC Role / Device Role / Timing Role: Primary overvoltage suppression device mounted at connector interface, upstream of optocoupler input stage.

Use Value: Absorbs 500 W surges without degradation, maintaining <1 µA leakage to preserve input threshold accuracy and reduce false triggering.

Telecom Power Supply Surge Protection

Medical Equipment Power Entry Filtering

Use Scenario: Secondary-level clamping on 24 V telecom rectifier outputs exposed to lightning-induced surges per IEC 61000-4-5 Level 3 (1 kV/2 Ω).

IC Role / Device Role / Timing Role: Fast-response shunt protector working in coordination with MOVs and common-mode chokes.

Use Value: Responds in <1 ps to limit let-through energy, reducing stress on downstream DC/DC converters and PMICs.

Use Scenario: Safeguarding isolated 24 V auxiliary power rails in diagnostic imaging equipment against ESD and defibrillator discharge coupling.

IC Role / Device Role / Timing Role: RoHS-compliant, halogen-free TVS placed at front-end power entry with traceable sourcing.

Use Value: Meets IEC 60601-1 creepage/clearance requirements via DO-15 package geometry and 175 °C TJ rating for sterilization-cycle thermal resilience.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ24A-E3/5A	Same V_WM (24 V), lower P_PPM (400 W), SMA package (surface-mount), 13.4 A I_PPM, 38.9 V V_C	Requires PCB rework for SMT layout; lacks AEC-Q101 qualification; suited for space-constrained consumer designs.	Select for cost-sensitive, non-automotive applications where board area is limited and qualification is not mandated.
1.5KE24A	Higher P_PPM (1500 W), DO-201AD package, 100 A I_PPM, 36.0 V V_C, same V_WM/V_BR range	Over-specified for typical 24 V I/O protection; larger footprint; higher capacitance may affect high-speed signal integrity.	Choose only when legacy 1.5KE footprint must be retained or when immunity to extreme 1500 W surges is explicitly required.

Compared with SMAJ24A-E3/5A and 1.5KE24A, the SA24HE3/73 offers AEC-Q101 qualification and DO-15 through-hole robustness ideal for high-reliability industrial and automotive harness-mounted protection - balancing proven surge handling, thermal stability, and qualification compliance without over-engineering.

Availability

SA24HE3/73 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, telecom power supplies, and medical auxiliary power systems requiring stable component supply and full traceability.

Supply support for SA24HE3/73 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, TVS devices, and optoelectronics with emphasis on reliability, qualification, and application-specific performance.

The SAxxA series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, thermal resilience, and repeatable clamping are mandatory.

FAQ

What is the maximum clamping voltage of the SA24HE3/73 under a 10/1000 µs surge?

The SA24HE3/73 has a maximum clamping voltage (V_C) of 38.9 V at 12.9 A peak pulse current (I_PPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 7 in Vishay document 88378 and defines the upper voltage limit imposed on protected circuits during transient events. The SA24HE3/73 maintains this clamping performance across its full operating temperature range.

Is the SA24HE3/73 qualified for automotive applications?

Yes, the SA24HE3/73 carries the HE3 suffix, which denotes AEC-Q101 qualification per Vishay's ordering nomenclature and mechanical data section. It has passed stress tests including high-temperature operating life, temperature cycling, and humidity bias robustness - making it suitable for under-hood and chassis-mounted automotive systems. The SA24HE3/73 meets all requirements specified in the AEC-Q101-011 standard for TVS diodes.

What does the "HE3" suffix mean in SA24HE3/73?

The "HE3" suffix in SA24HE3/73 indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. Per Vishay's documentation, "HE3" parts are automotive-grade variants with enhanced reliability testing, while "E3" denotes commercial-grade RoHS compliance only. The SA24HE3/73 is therefore certified for mission-critical automotive and industrial deployments where long-term reliability is essential.

Can the SA24HE3/73 be used in bi-directional protection circuits?

No, the SA24HE3/73 is a uni-directional TVS diode, as confirmed by its part number ending in "A" (not "CA") and its specified polarity in the primary characteristics table. Bi-directional operation requires the CA suffix (e.g., SA24CA). Using the SA24HE3/73 in bi-directional configurations would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.

What is the thermal derating behavior of the SA24HE3/73 above 25 °C ambient?

The SA24HE3/73 follows the steady-state power derating curve in Figure 5 of Vishay document 88378: its 3.0 W power dissipation rating linearly decreases above T_L = 25 °C, reaching zero at T_L = 175 °C. At T_L = 75 °C, it sustains full 3.0 W; at T_L = 125 °C, it supports ~1.5 W. This derating applies to continuous power, not transient pulses - the 500 W peak pulse rating remains valid regardless of ambient temperature per Fig. 2.

SA24HE3/73 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):: 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:: -

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)

SA24HE3/73 FAQ

1.How can I place an order for SA24HE3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA24HE3/73 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 SA24HE3/73 reliable?

The price and inventory of SA24HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA24HE3/73 is usually 5 days.

3.What payment methods are accepted for SA24HE3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA24HE3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA24HE3/73?

SA24HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA24HE3/73 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 SA24HE3/73?

For technical support, including SA24HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA24HE3/73 requirements.

6.How does Aetrix verify that SA24HE3/73 is sourced from the original manufacturer or authorized distributors?

All SA24HE3/73 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 SA24HE3/73 meets industry standards.

7.What is the process for return or replacement of SA24HE3/73?

All SA24HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA24HE3/73, 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 SA24HE3/73 part is unused and in its original packaging.

Return procedure for SA24HE3/73:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …