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

onsemi 3EZ24D5RL

Name: 3EZ24D5RL
Brand: onsemi
SKU: 3EZ24D5RL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 3EZ24D5RL

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 3EZ24D5RL.pdf

Description:: DIODE ZENER 24V 3W AXIAL

Quantity:: RFQ Add To RFQ list

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Inventory:36,000

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Product details

Overview

3EZ24D5RL 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 mA test current, and surge rating of 98 W for 1 ms. It operates from −65°C to +200°C and is used for voltage regulation and overvoltage protection in DC power supplies and reference circuits.

For engineers reviewing the 3EZ24D5RL datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DO−41 package details, thermal derating curves, leakage behavior at VR = 18.2 V, and validated alternative Zener regulators for stable 24 V clamping.

Technical Context

This device belongs to the 3EZxxxD5 series of silicon-oxide passivated Zener diodes in Surmetic 30 construction. Its junction design ensures low leakage (≤0.5 μA at VR = 18.2 V), high ESD robustness (>16 kV HBM), and stable regulation under transient surges up to 98 W.

The DO−41 package enables axial mounting in any orientation with cathode polarity marked by a band. Thermal performance is defined by lead-to-ambient resistance (LA ≈ 30–40°C/W) and junction-to-lead transient thermal resistance curves, supporting reliable operation at TL ≤ 230°C for 10 s during soldering.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	22.8 V min / 24 V nom / 25.2 V max @ I_ZT = 9 mA - defines precise clamping threshold for 24 V rail protection
Zener Impedance (Z_ZT)	31 Ω max @ I_ZT = 9 mA - determines regulation accuracy under load variation
Maximum DC Zener Current (I_ZM)	112 mA - sets upper limit for continuous power dissipation (P_D = 3 W @ T_L = 75°C)
Reverse Leakage (I_R)	0.5 μA max @ V_R = 18.2 V - ensures minimal standby current in high-impedance bias networks
Surge Power Rating	98 W @ 1 ms pulse - supports transient overvoltage suppression without degradation
ESD Rating	Class 3 (>16 kV) per HBM - provides robust handling in manual assembly and field environments
Operating Temperature	−65°C to +200°C - enables use in automotive engine compartments and industrial motor controls

Pinout & Package

Package: DO−41 (Case 59−10), axial-leaded plastic, void-free thermosetting material, cathode indicated by polarity band. Lead diameter uncontrolled within 0.71–0.86 mm; overall length ≥25.4 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential node in reverse-biased Zener configuration; carries forward current up to 200 mA
Cathode	Zener breakdown terminal	Connected to higher-potential node; voltage referenced to this terminal during regulation; marked by polarity band

Key Features

Feature	Design Value
Silicon-oxide passivated junction	Enables stable long-term Zener voltage drift < ±0.1%/1000 h and low noise regulation
Surmetic 30 construction	Delivers 98 W non-repetitive surge capability without metallurgical degradation
Pb-free compatible packaging	Meets RoHS Directive 2011/65/EU with identical electrical specs to standard version
DO−41 footprint compatibility	Fits same PCB land pattern as legacy 1 W Zeners while delivering 3× power handling
Class 3 ESD robustness	Eliminates need for external ESD protection in board-level handling and end-use environments

Applications

DC Power Supply Regulation	Overvoltage Clamp Circuit
Use Scenario: Stabilizing output of unregulated linear power supply feeding analog sensor circuitry. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to maintain constant 24 V reference across load variations. Use Value: Maintains ±1% output stability over 10–112 mA load range due to 31 Ω Z_ZT and low thermal coefficient.	Use Scenario: Protecting microcontroller I/O pin against 36 V transients induced by relay coil flyback. IC Role / Device Role / Timing Role: Shunting excess energy to ground when input exceeds 25.2 V, limiting voltage to safe level. Use Value: Absorbs 98 W for 1 ms without failure, preventing latch-up or gate oxide damage in connected logic.
Voltage Reference for ADC	Field Instrumentation Signal Conditioning
Use Scenario: Providing precision 24 V reference for 12-bit SAR ADC in programmable logic controller module. IC Role / Device Role / Timing Role: Low-drift Zener source establishing full-scale input range for analog front-end. Use Value: Delivers <0.5 μA leakage at 18.2 V, minimizing error contribution in high-impedance divider networks.	Use Scenario: Biasing 4–20 mA transmitter loop powered from 24 V industrial bus with temperature extremes. IC Role / Device Role / Timing Role: Regulating local 24 V rail for op-amp and current-sense ICs across −40°C to +85°C ambient. Use Value: Operates reliably from −65°C to +200°C junction temperature, enabling extended thermal margin in sealed enclosures.

DC Power Supply Regulation

Overvoltage Clamp Circuit

Use Scenario: Stabilizing output of unregulated linear power supply feeding analog sensor circuitry.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to maintain constant 24 V reference across load variations.

Use Value: Maintains ±1% output stability over 10–112 mA load range due to 31 Ω Z_ZT and low thermal coefficient.

Use Scenario: Protecting microcontroller I/O pin against 36 V transients induced by relay coil flyback.

IC Role / Device Role / Timing Role: Shunting excess energy to ground when input exceeds 25.2 V, limiting voltage to safe level.

Use Value: Absorbs 98 W for 1 ms without failure, preventing latch-up or gate oxide damage in connected logic.

Voltage Reference for ADC

Field Instrumentation Signal Conditioning

Use Scenario: Providing precision 24 V reference for 12-bit SAR ADC in programmable logic controller module.

IC Role / Device Role / Timing Role: Low-drift Zener source establishing full-scale input range for analog front-end.

Use Value: Delivers <0.5 μA leakage at 18.2 V, minimizing error contribution in high-impedance divider networks.

Use Scenario: Biasing 4–20 mA transmitter loop powered from 24 V industrial bus with temperature extremes.

IC Role / Device Role / Timing Role: Regulating local 24 V rail for op-amp and current-sense ICs across −40°C to +85°C ambient.

Use Value: Operates reliably from −65°C to +200°C junction temperature, enabling extended thermal margin in sealed enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5248BRLG	1 W rating, 24 V ±5%, Z_ZT = 35 Ω @ 10 mA, DO−35 package	Lower power handling limits continuous current to ~42 mA; unsuitable for >1 W sustained dissipation	Select when board space is constrained and peak power remains <1 W
MMSZ5248ET1G	500 mW SOD−123 surface-mount, 24 V ±5%, Z_ZT = 33 Ω @ 20 mA	No axial leads; requires reflow-compatible layout; thermal path relies on PCB copper, not leads	Select for automated assembly and compact PCBs where 0.5 W dissipation suffices

Compared with 1N5248BRLG and MMSZ5248ET1G, the 3EZ24D5RL offers triple the power rating and superior surge immunity in an axial through-hole package-critical for industrial power rails where transient energy exceeds 50 W and manual serviceability is required.

Availability

3EZ24D5RL is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage clamp circuits, and industrial voltage reference applications requiring stable component supply across automotive, factory automation, and energy metering programs.

Supply support for 3EZ24D5RL 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 supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.

The 3EZxxxD5 series was designed specifically for high-reliability voltage regulation in harsh-environment power systems, emphasizing surge resilience, wide temperature operation, and Pb-free manufacturability.

FAQ

What is the Zener voltage tolerance of the 3EZ24D5RL?

The 3EZ24D5RL has a Zener voltage tolerance of ±5%, with a nominal value of 24 V and guaranteed range of 22.8 V to 25.2 V at I_ZT = 9 mA and T_A = 25°C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (3EZ4.3D5/D, Rev. 4). The "D5" suffix explicitly denotes the ±5% tolerance grade for the 3EZ24D5RL.

Can the 3EZ24D5RL be used in surface-mount designs?

No, the 3EZ24D5RL is exclusively offered in the axial-leaded DO−41 (Case 59−10) package and is not compatible with surface-mount assembly processes. Its mechanical outline specifies lead length ≥25.4 mm and axial orientation; attempting reflow or hand-soldering as an SMD will violate thermal and mechanical specifications. For SMT alternatives, consider MMSZ5248ET1G or BZX55C24.

What is the maximum steady-state power dissipation for the 3EZ24D5RL at room temperature?

The 3EZ24D5RL has a maximum steady-state power dissipation of 1 W at T_A = 50°C, derating at 6.67 mW/°C above that temperature. At T_L = 75°C with 3/8″ lead length, it sustains 3 W-this higher rating depends on effective heat sinking via leads, not ambient air. Both ratings are specified in the Maximum Ratings table on page 1 of the onsemi datasheet.

Does the 3EZ24D5RL meet RoHS requirements?

Yes, the 3EZ24D5RL is manufactured in a Pb-free package compliant with the EU RoHS Directive 2011/65/EU. The datasheet states: "These devices are available in Pb−free package(s). Specifications herein apply to both standard and Pb−free devices." No performance or reliability trade-offs accompany the Pb-free construction.

How does the 3EZ24D5RL handle repetitive surge events?

Per the datasheet, the 98 W surge rating applies only to non-repetitive pulses of 1 ms duration. Repetitive surges require derating based on duty cycle and thermal time constants shown in Figure 2 (transient thermal resistance). Exceeding Figure 3's surge power envelope-even with low duty cycle-risks localized junction degradation due to current crowding, so each event must remain within the single-pulse limit unless validated by thermal modeling.

3EZ24D5RL 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:: 1.5 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: Axial

3EZ24D5RL FAQ

1.How can I place an order for 3EZ24D5RL through Aetrix?

Please submit a Request for Quotation (RFQ) for 3EZ24D5RL 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 3EZ24D5RL reliable?

The price and inventory of 3EZ24D5RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3EZ24D5RL is usually 5 days.

3.What payment methods are accepted for 3EZ24D5RL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3EZ24D5RL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 3EZ24D5RL?

3EZ24D5RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 3EZ24D5RL 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 3EZ24D5RL?

For technical support, including 3EZ24D5RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3EZ24D5RL requirements.

6.How does Aetrix verify that 3EZ24D5RL is sourced from the original manufacturer or authorized distributors?

All 3EZ24D5RL 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 3EZ24D5RL meets industry standards.

7.What is the process for return or replacement of 3EZ24D5RL?

All 3EZ24D5RL units undergo pre-shipment inspection (PSI). If there is an issue with 3EZ24D5RL, 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 3EZ24D5RL part is unused and in its original packaging.

Return procedure for 3EZ24D5RL:

1.Submit a request within 90 days.

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

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