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 SA24CA-E3/73

Name: SA24CA-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA24CA-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SA24CA-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA24CA-E3/73.pdf

Description:: TVS DIODE 24VWM 38.9VC DO204AC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,365

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

Product details

Overview

SA24CA-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 24 V stand-off voltage (V_WM), 26.7–29.5 V breakdown voltage (V_BR), 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 to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.

For engineers reviewing the SA24CA-E3/73 datasheet, SA24CA-E3/73 pinout, SA24CA-E3/73 application, or SA24CA-E3/73 equivalent, this page delivers verified electrical parameters, DO-15 terminal behavior, bidirectional clamping performance, AEC-Q101 qualification status, and direct alternatives for automotive and industrial surge protection design.

Technical Context

The SA24CA-E3/73 operates as a symmetrical silicon avalanche diode with identical forward and reverse breakdown characteristics, enabling bidirectional transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable V_BR tolerance (±5 % at I_T = 1 mA) and low incremental surge resistance, critical for fast response (<1 ns) to ESD events per IEC 61000-4-2.

It is rated for continuous power dissipation of 3.0 W on an infinite heatsink at T_L = 75 °C and supports operating junction temperatures from –55 °C to +175 °C. The device meets JESD 22-B106 solderability (275 °C, 10 s) and JESD 201 Class 1A whisker resistance (E3 suffix), confirming suitability for automated assembly in high-reliability applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	24 V - Maximum DC or RMS voltage the device blocks continuously without conduction
V_BR (min/max)	26.7 V / 29.5 V at I_T = 1 mA - Ensures reliable turn-on before system damage during overvoltage events
V_C @ I_PPM	38.9 V at 12.9 A (10/1000 μs) - Clamped voltage seen by protected circuit under worst-case surge
P_PPM	500 W - Peak transient energy absorption capability, defining surge robustness in repetitive or single-event conditions
I_PPM	12.9 A - Maximum non-repetitive surge current supported without degradation
T_J range	–55 °C to +175 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor equipment
AEC-Q101	Qualified - Validated for automotive electronics per stress test requirements (HTOL, TC, UHAST, etc.)

Pinout & Package

SA24CA-E3/73 uses the DO-15 (DO-204AC) axial-leaded package: molded epoxy body with matte tin-plated leads, 0.130–0.138 inch diameter, 1.0 inch minimum lead length. Bidirectional construction means no polarity marking; both terminals are electrically symmetric.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Transient conduction path	Either terminal serves as input/output for bidirectional clamping; no cathode band or polarity identification required
Lead 1 / Lead 2	PCB interconnect interface	Matte tin-plated, J-STD-002 compliant; supports wave/solder reflow with 275 °C max. exposure for 10 s

Key Features

Feature	Design Value
Glass-passivated junction	Stable V_BR tolerance (±5 %) and long-term reliability under thermal cycling and humidity stress
500 W peak pulse power (10/1000 μs)	Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity in industrial control inputs
AEC-Q101 qualification (HE3 variant)	E3 suffix indicates commercial grade; HE3 variant required for automotive-grade deployment
Low clamping ratio (V_C/V_BR ≈ 1.38)	Minimizes let-through voltage to sensitive downstream ICs during transient events
UL 94 V-0 molding compound	Meets flammability safety requirements for enclosed industrial and medical enclosures

Applications

Industrial Motor Drives	Automotive Body Control Modules
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Bidirectional TVS placed across I/O pins or supply rails to clamp ±30 V transients within <1 ns. Use Value: Prevents latch-up or permanent damage to microcontrollers and isolated gate drivers during load dump or switch-off events.	Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to battery transients and load dump. IC Role / Device Role / Timing Role: Standoff-rated clamping element absorbing 500 W pulses while maintaining signal integrity on 12 V systems. Use Value: Enables compliance with ISO 7637-2 Pulse 1/2a/3a and AEC-Q100 stress profiles without additional filtering.
Industrial PLC Analog Inputs	Consumer Appliance Power Supplies
Use Scenario: Guarding 4–20 mA current loop inputs against ESD and field wiring faults in factory automation cabinets. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA at 24 V) bidirectional suppressor ensuring measurement accuracy remains unaffected during standby. Use Value: Maintains <0.1 % full-scale error contribution while surviving repeated 8 kV contact ESD per IEC 61000-4-2.	Use Scenario: Input-stage protection on AC/DC adapter primary-side rectifiers and secondary-side 5 V/3.3 V rails. IC Role / Device Role / Timing Role: Fast-response clamping device limiting surge voltage to <39 V during lightning-induced surges on mains-connected devices. Use Value: Eliminates need for redundant MOVs or gas discharge tubes in space-constrained white goods designs.

Industrial Motor Drives

Automotive Body Control Modules

Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from relay coils and solenoid loads.

IC Role / Device Role / Timing Role: Bidirectional TVS placed across I/O pins or supply rails to clamp ±30 V transients within <1 ns.

Use Value: Prevents latch-up or permanent damage to microcontrollers and isolated gate drivers during load dump or switch-off events.

Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to battery transients and load dump.

IC Role / Device Role / Timing Role: Standoff-rated clamping element absorbing 500 W pulses while maintaining signal integrity on 12 V systems.

Use Value: Enables compliance with ISO 7637-2 Pulse 1/2a/3a and AEC-Q100 stress profiles without additional filtering.

Industrial PLC Analog Inputs

Consumer Appliance Power Supplies

Use Scenario: Guarding 4–20 mA current loop inputs against ESD and field wiring faults in factory automation cabinets.

IC Role / Device Role / Timing Role: Low-leakage (≤1 μA at 24 V) bidirectional suppressor ensuring measurement accuracy remains unaffected during standby.

Use Value: Maintains <0.1 % full-scale error contribution while surviving repeated 8 kV contact ESD per IEC 61000-4-2.

Use Scenario: Input-stage protection on AC/DC adapter primary-side rectifiers and secondary-side 5 V/3.3 V rails.

IC Role / Device Role / Timing Role: Fast-response clamping device limiting surge voltage to <39 V during lightning-induced surges on mains-connected devices.

Use Value: Eliminates need for redundant MOVs or gas discharge tubes in space-constrained white goods designs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ24CA	DO-214AC (SMA) package, same V_WM/V_BR, lower I_PPM (11.7 A), same P_PPM (400 W)	Surface-mount alternative for PCB area-constrained designs; not drop-in compatible due to footprint and thermal mass differences	Select SMAJ24CA when board space is limited and reflow compatibility is required; verify trace width and pad thermal relief for 500 W surge handling.
1.5KE24CA	DO-201AD package, higher P_PPM (1500 W), same V_WM/V_BR, larger case size and higher I_PPM (65.8 A)	Higher-power replacement for heavy-duty industrial surge zones (e.g., AC line entry); requires larger mounting area and different lead forming	Choose 1.5KE24CA where system-level surge testing exceeds IEC 61000-4-5 Level 4; confirm mechanical fit and creepage/clearance compliance.

Compared with SMAJ24CA and 1.5KE24CA, SA24CA-E3/73 offers optimal balance of axial-leaded manufacturability, AEC-Q101 readiness (via HE3 variant), and 500 W surge capacity in cost-sensitive industrial and automotive auxiliary circuits - making it ideal for through-hole production environments requiring proven field reliability.

Availability

SA24CA-E3/73 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, PLC analog inputs, and consumer appliance power supplies requiring stable component supply across multi-year production cycles.

Supply support for SA24CA-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, MOSFETs, and passive components with emphasis on reliability, efficiency, and automotive-grade qualification.

The SAxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without adding complexity.

FAQ

What is the clamping voltage of SA24CA-E3/73 at its rated peak pulse current?

The SA24CA-E3/73 has a maximum clamping voltage (V_C) of 38.9 V when subjected to its rated peak pulse current (I_PPM) of 12.9 A under the standard 10/1000 μs waveform. This value is measured per Figure 9 in the Vishay datasheet 88378 and defines the upper voltage limit imposed on protected circuitry during surge events. The SA24CA-E3/73 maintains this clamping performance across its full operating temperature range.

Is SA24CA-E3/73 suitable for automotive applications?

The SA24CA-E3/73 is RoHS-compliant and manufactured to commercial-grade specifications. For automotive use, Vishay offers the SA24CA-HE3/73 variant, which carries AEC-Q101 qualification. While the SA24CA-E3/73 shares identical electrical specs, only the HE3 version is validated for automotive stress tests including HTOL, temperature cycling, and unbiased HAST. Designers must specify SA24CA-HE3/73 for qualified automotive deployments.

Does SA24CA-E3/73 have polarity markings on its DO-15 package?

No, SA24CA-E3/73 does not feature polarity markings. As a bidirectional TVS diode, it exhibits symmetrical breakdown behavior in both directions, and neither terminal is designated anode or cathode. The DO-15 body is unmarked - consistent with Vishay's specification stating "no marking on bidirectional types." This simplifies layout and eliminates orientation errors during manual or automated insertion.

What is the maximum steady-state power dissipation for SA24CA-E3/73?

The SA24CA-E3/73 has a maximum steady-state power dissipation (P_D) of 3.0 W when mounted on an infinite heatsink at a lead temperature (T_L) of 75 °C, per Figure 5 in the Vishay datasheet. Derating is required above 75 °C - e.g., ~2.2 W at T_L = 100 °C. This rating applies only to continuous DC or low-frequency operation, not transient suppression duty cycles.

How does SA24CA-E3/73 compare to unidirectional SA24A-E3/73 in terms of circuit protection?

The SA24CA-E3/73 provides symmetrical clamping for AC-coupled or floating lines (e.g., differential buses, transformer-isolated signals), whereas the unidirectional SA24A-E3/73 protects DC-biased paths with defined polarity (e.g., 24 V supply rails). Their V_WM, V_BR, and V_C values are identical, but SA24A-E3/73 includes a cathode band and conducts only in reverse - making SA24CA-E3/73 the correct choice when voltage transients may swing positive or negative relative to ground.

SA24CA-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:: Active

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 24V

Voltage - Breakdown (Min):: 26.7V

Voltage - Clamping (Max) @ Ipp:: 38.9V

Current - Peak Pulse (10/1000µs):: 12.9A

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)

SA24CA-E3/73 FAQ

1.How can I place an order for SA24CA-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA24CA-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 SA24CA-E3/73 reliable?

The price and inventory of SA24CA-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 SA24CA-E3/73 is usually 5 days.

3.What payment methods are accepted for SA24CA-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA24CA-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA24CA-E3/73?

SA24CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA24CA-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 SA24CA-E3/73?

For technical support, including SA24CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA24CA-E3/73 requirements.

6.How does Aetrix verify that SA24CA-E3/73 is sourced from the original manufacturer or authorized distributors?

All SA24CA-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 SA24CA-E3/73 meets industry standards.

7.What is the process for return or replacement of SA24CA-E3/73?

All SA24CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA24CA-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 SA24CA-E3/73 part is unused and in its original packaging.

Return procedure for SA24CA-E3/73:

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 …