1N4728A_S00Z Equivalent & Substitute Parts

Part Overview

The 1N4728A_S00Z is a Zener diode rated at 3.3 V nominal voltage with 1 W maximum power dissipation in a through-hole DO-41 package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete product status, identifying equivalent substitute parts with matching electrical and mechanical specifications is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

1N4728A_S00Z

onsemiIn Stock: 7751N4728A_S00Z Datasheet

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1N4728A

Lumimax Optoelectronic TechnologyIn Stock: 202491N4728A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1N4728A_S00Z are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Zener voltage (Vz): 3.3 V nominal
• Tolerance: ±5%
• Maximum power rating: 1 W
• Maximum impedance (Zzt): 10 Ohms
• Reverse leakage current: 100 µA @ 1 V
• Operating temperature range: -65°C ~ 200°C
• Mounting type: Through Hole
• Package designation: DO-41 or equivalent axial package

Parts meeting all these specifications are classified as direct substitutes. The 1N4728A from Lumimax Optoelectronic Technology satisfies all electrical and mechanical requirements and is therefore a valid equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 1N4728A manufactured by Lumimax Optoelectronic Technology is a direct electrical and mechanical equivalent to the 1N4728A_S00Z. Both components share identical zener voltage, power rating, impedance, leakage current specifications, and operating temperature range. Both are packaged in DO-41 through-hole configuration.

The Lumimax 1N4728A offers the advantage of active product status, ensuring ongoing availability and supply chain continuity. Additionally, the Lumimax part carries RoHS Compliance certification, meeting environmental regulatory requirements. Both parts maintain REACH Unaffected status and EAR99 export classification.

Selection between these parts should be based on procurement requirements, supply chain considerations, and regulatory compliance mandates specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the 1N4728A from Lumimax be used as a direct replacement for the onsemi 1N4728A_S00Z?

A: Yes. Both components have identical electrical specifications including 3.3 V zener voltage, 1 W power rating, 10 Ohms maximum impedance, and 100 µA reverse leakage current. Both are packaged in DO-41 through-hole configuration with matching operating temperature ranges of -65°C to 200°C.

Q: What is the significance of the DO-41G package designation versus DO-41?

A: Both designations refer to the same axial through-hole package form factor. The "G" suffix in DO-41G indicates a specific supplier variant designation but does not alter the physical or electrical compatibility of the component.

Q: Why is the onsemi 1N4728A_S00Z listed as obsolete?

A: Obsolete status indicates that the manufacturer has discontinued production of this specific part number. This necessitates identification of equivalent active alternatives to maintain design continuity and ensure component availability.

Q: Are there compliance differences between the two parts?

A: The Lumimax 1N4728A carries RoHS Compliance certification, while the onsemi part does not specify RoHS status. Both parts maintain REACH Unaffected status. Applications requiring RoHS compliance should specify the Lumimax equivalent.

Q: What parameters must match for a zener diode to be considered a substitute?

A: Critical parameters include nominal zener voltage, voltage tolerance, maximum power dissipation, maximum impedance, reverse leakage current, operating temperature range, mounting type, and package configuration. All these parameters must match within specified tolerances for electrical and mechanical compatibility.