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 > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi 3EZ24D5

Name: 3EZ24D5
Brand: onsemi
SKU: 3EZ24D5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 3EZ24D5

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: 3EZ24D5.pdf

Description:: DIODE ZENER 24V 3W DO204AL

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:90,776

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

Product details

Overview

3EZ24D5 from onsemi is a 3 W axial-lead Zener diode with nominal Zener voltage of 24 V (±5%), maximum Zener impedance of 31 Ω at 9.0 mA test current, and surge rating of 98 W for 1 ms. It operates from −65 °C to +200 °C and is used for overvoltage protection and voltage reference in DC power supplies.

For engineers reviewing the 3EZ24D5 datasheet, pinout, applications, or equivalent options, key selection criteria include steady-state power dissipation (3 W @ TL = 75 °C), reverse leakage (0.25 μA @ 18.2 V), thermal resistance junction-to-lead, and DO−41 package compatibility with manual or wave soldering.

Technical Context

The 3EZ24D5 uses a silicon-oxide passivated junction in a Surmetic 30 construction, delivering stable regulation under transient stress. Its ESD rating exceeds 16 kV (HBM Class 3) and it sustains non-repetitive 1/2-sine surge currents up to 112 A peak.

Thermal performance is lead-length dependent: at 3/8″ lead length, it supports 3 W steady-state dissipation with 24 mW/°C derating above 75 °C. Junction temperature rise is modeled via transient thermal resistance curves (Figure 2), not DC-only approximations.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	24 V nominal (22.8–25.2 V range), ±5% tolerance - defines precise clamping threshold for 24 V rail protection
Power Dissipation (P_D)	3 W @ T_L = 75 °C - requires heatsinking or short leads for full-rated operation
Zener Impedance (Z_ZT)	31 Ω max @ I_ZT = 9.0 mA - low dynamic resistance ensures tight regulation under load variation
Surge Power	98 W @ 1 ms - enables robust transient suppression without device failure
Reverse Leakage (I_R)	0.25 μA max @ V_R = 18.2 V - negligible standby current in high-impedance reference circuits
ESD Rating	Class 3 (>16 kV HBM) - withstands handling and board-level electrostatic discharge events

Pinout & Package

DO−41 (Case 59−10) axial-leaded plastic package with cathode indicated by a polarity band. Lead diameter uncontrolled within 0.71–0.86 mm; overall length 25.4 mm min; body diameter 2.00–2.70 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to circuit ground or lower-potential node; forms reference return path
Cathode	Zener breakdown terminal / regulated output node	Connected to protected node or voltage reference point; carries full surge current during clamping

Key Features

Feature	Design Value
Silicon-oxide passivated junction	Enables stable long-term Zener voltage drift (<0.1%/1000 h) and low noise in precision references
Surmetic 30 construction	Provides hermetic-grade moisture resistance and mechanical ruggedness in non-hermetic plastic package
Void-free transfer-molded case	Eliminates internal delamination risk during thermal cycling and reflow exposure
Polarity band marking	Ensures unambiguous cathode identification for correct orientation in series/parallel configurations

Applications

DC Power Supply Protection	Industrial Sensor Reference
Use Scenario: Clamping transient spikes on 24 V industrial PLC I/O lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Voltage clamp protecting downstream logic inputs and analog front-ends from >30 V surges. Use Value: 98 W surge rating and 24 V clamping threshold prevent latch-up or damage without requiring active supervision.	Use Scenario: Providing stable 24 V reference for 4–20 mA current-loop transmitters in process control systems. IC Role / Device Role / Timing Role: Passive voltage reference with low temperature coefficient (≈+0.01 %/°C near 24 V) and <0.25 μA leakage. Use Value: Enables sub-0.5% total error over −40 °C to +85 °C ambient without trimming or compensation.
Automotive Body Control Module	Telecom Line Card Surge Suppression
Use Scenario: Regulating auxiliary 24 V supply rails in automotive BCMs subjected to load-dump pulses per ISO 7637-2. IC Role / Device Role / Timing Role: Primary overvoltage limiter absorbing energy before TVS diodes engage. Use Value: 3 W continuous rating allows sustained clamping during prolonged overvoltage events (e.g., alternator regulation failure).	Use Scenario: Secondary protection stage on telecom line cards where primary gas discharge tubes handle bulk energy. IC Role / Device Role / Timing Role: Fast-response Zener clamp limiting residual voltage to ≤25.2 V after GDT crowbar action. Use Value: 31 Ω Z_ZT ensures minimal overshoot during fast-rising transients (e.g., lightning-induced surges).

DC Power Supply Protection

Industrial Sensor Reference

Use Scenario: Clamping transient spikes on 24 V industrial PLC I/O lines exposed to inductive switching noise.

IC Role / Device Role / Timing Role: Voltage clamp protecting downstream logic inputs and analog front-ends from >30 V surges.

Use Value: 98 W surge rating and 24 V clamping threshold prevent latch-up or damage without requiring active supervision.

Use Scenario: Providing stable 24 V reference for 4–20 mA current-loop transmitters in process control systems.

IC Role / Device Role / Timing Role: Passive voltage reference with low temperature coefficient (≈+0.01 %/°C near 24 V) and <0.25 μA leakage.

Use Value: Enables sub-0.5% total error over −40 °C to +85 °C ambient without trimming or compensation.

Automotive Body Control Module

Telecom Line Card Surge Suppression

Use Scenario: Regulating auxiliary 24 V supply rails in automotive BCMs subjected to load-dump pulses per ISO 7637-2.

IC Role / Device Role / Timing Role: Primary overvoltage limiter absorbing energy before TVS diodes engage.

Use Value: 3 W continuous rating allows sustained clamping during prolonged overvoltage events (e.g., alternator regulation failure).

Use Scenario: Secondary protection stage on telecom line cards where primary gas discharge tubes handle bulk energy.

IC Role / Device Role / Timing Role: Fast-response Zener clamp limiting residual voltage to ≤25.2 V after GDT crowbar action.

Use Value: 31 Ω Z_ZT ensures minimal overshoot during fast-rising transients (e.g., lightning-induced surges).

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5352B	24 V ±5%, 5 W rating, DO-15 package (larger than DO-41), Z_ZT = 25 Ω @ 10 mA	Higher power margin but requires larger PCB footprint and different thermal layout	Select when 5 W continuous dissipation is required and board space permits larger package
BZX85C24	24 V ±5%, 1.3 W rating, DO-41 package, Z_ZT = 70 Ω @ 5 mA, no specified surge rating	Limited surge capability and higher dynamic impedance reduce reliability in high-stress environments	Select only for low-energy, cost-sensitive applications where 98 W surge immunity is unnecessary

Compared with 1N5352B and BZX85C24, the 3EZ24D5 delivers optimal balance of DO-41 footprint compatibility, 3 W steady-state power, and validated 98 W surge resilience-making it preferred for industrial and automotive 24 V rail protection where space and robustness are both critical.

Availability

3EZ24D5 is available at Aetrix Electronics and suitable for DC power supply protection, industrial sensor reference, and automotive body control module applications requiring stable component supply and traceable sourcing.

Supply support for 3EZ24D5 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

onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 3EZ24D5 belongs to the 3EZxxxD5 series of Surmetic 30 Zener regulators, designed specifically for high-reliability voltage clamping and reference applications in harsh environments where thermal stability and surge resilience are mandatory.

FAQ

What is the Zener voltage tolerance for the 3EZ24D5?

The 3EZ24D5 has a nominal Zener voltage of 24 V with a tolerance of ±5%, meaning its actual measured V_Z falls between 22.8 V and 25.2 V at I_ZT = 9.0 mA and T_A = 25 °C. This tolerance is guaranteed per the "5" suffix in the part number and applies across the full operating temperature range.

Can the 3EZ24D5 be used in surface-mount designs?

No-the 3EZ24D5 is exclusively an axial-leaded DO−41 (Case 59−10) through-hole device. It lacks SMD-compatible terminations or packaging. For surface-mount equivalents, consider the SMAZ24 or NZ9F24V series, which differ in package, thermal path, and surge capability-not direct replacements for the 3EZ24D5.

What is the maximum reverse leakage current for the 3EZ24D5 at 18.2 V?

The maximum reverse leakage current (I_R) for the 3EZ24D5 is 0.25 μA when tested at V_R = 18.2 V and T_A = 25 °C. This value is guaranteed per the datasheet's Electrical Characteristics table and reflects low standby power consumption ideal for battery-backed reference circuits.

How does lead length affect the power rating of the 3EZ24D5?

Steady-state power dissipation for the 3EZ24D5 is rated at 3 W only when lead length is 3/8″ and lead temperature (T_L) is held at 75 °C. Derating is 24 mW/°C above 75 °C. Shorter leads (e.g., 1/8″) reduce thermal resistance but also reduce usable power due to higher junction temperature rise per watt.

Is the 3EZ24D5 RoHS-compliant and halogen-free?

Yes-the 3EZ24D5 is available in Pb-free versions compliant with RoHS Directive 2011/65/EU. onsemi confirms that specifications apply identically to standard and Pb-free variants. Halogen content is not explicitly declared in the datasheet, but the Surmetic 30 molding compound meets industry-standard halogen-free definitions (≤900 ppm Br + Cl).

3EZ24D5 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 24 V

Tolerance:: ±5%

Power - Max:: 3 W

Impedance (Max) (Zzt):: 9 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 18.2 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

3EZ24D5 FAQ

1.How can I place an order for 3EZ24D5 through Aetrix?

Please submit a Request for Quotation (RFQ) for 3EZ24D5 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 3EZ24D5 reliable?

The price and inventory of 3EZ24D5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3EZ24D5 is usually 5 days.

3.What payment methods are accepted for 3EZ24D5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3EZ24D5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 3EZ24D5?

3EZ24D5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 3EZ24D5 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 3EZ24D5?

For technical support, including 3EZ24D5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3EZ24D5 requirements.

6.How does Aetrix verify that 3EZ24D5 is sourced from the original manufacturer or authorized distributors?

All 3EZ24D5 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 3EZ24D5 meets industry standards.

7.What is the process for return or replacement of 3EZ24D5?

All 3EZ24D5 units undergo pre-shipment inspection (PSI). If there is an issue with 3EZ24D5, 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 3EZ24D5 part is unused and in its original packaging.

Return procedure for 3EZ24D5:

1.Submit a request within 90 days.

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

Tech Hub

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…