1N4729A_S00Z Equivalent & Substitute Parts

Part Overview

The 1N4729A_S00Z is a through-hole zener diode manufactured by onsemi, rated at 3.6 V nominal zener voltage with 1 W maximum power dissipation. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement. The diode is packaged in the DO-41 axial configuration and operates across a temperature range of -65°C to 200°C. Equivalent parts must maintain identical electrical specifications and mechanical compatibility to ensure direct substitution in existing circuit designs.

Substiute Parts

1N4729A_S00Z

onsemiIn Stock: 10131N4729A_S00Z Datasheet

Current PartRFQ

1N4729A BK TIN/LEAD

Central Semiconductor CorpIn Stock: 28681N4729A BK TIN/LEAD Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N4729A_S00Z is determined by strict equivalence across the following electrical and mechanical parameters:

• Zener Voltage (Vz): 3.6 V nominal with ±5% tolerance
• Power Rating: 1 W maximum dissipation
• Impedance: 10 Ohms maximum
• Reverse Leakage Current: 100 µA @ 1 V
• Operating Temperature: -65°C to 200°C (TJ)
• Package Configuration: DO-41 axial through-hole
• Moisture Sensitivity: MSL 1 (Unlimited)

Substitute parts must match all specified parameters without deviation. The 1N4729A BK TIN/LEAD from Central Semiconductor Corp satisfies all substitution criteria and is classified as an active product, providing continued availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

The 1N4729A BK TIN/LEAD from Central Semiconductor Corp is the qualified equivalent substitute for the obsolete 1N4729A_S00Z. Selection of this substitute is based on the following engineering criteria:

Product Status: The substitute part is classified as active, ensuring long-term availability and supply chain continuity. The original part is obsolete, making substitution necessary for new procurement and design support.

Regulatory Compliance: Both parts maintain identical REACH status (REACH Unaffected) and ECCN classification (EAR99), ensuring no change in export control or environmental compliance requirements.

RoHS Compliance: The substitute part is ROHS3 compliant, meeting current environmental standards for electronic components.

Electrical and Mechanical Equivalence: All specified electrical parameters, operating temperature range, and mechanical package configuration are identical between the original and substitute parts, enabling direct replacement without circuit redesign.

Packaging and Handling: Both parts share identical moisture sensitivity classification (MSL 1), requiring no change in storage, handling, or assembly procedures.

Frequently Asked Questions (FAQ)

Q: Can the 1N4729A BK TIN/LEAD be used as a direct replacement for the 1N4729A_S00Z?

A: Yes. The substitute part matches all electrical specifications, operating temperature range, and mechanical package configuration. Direct substitution is supported without circuit modification.

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

A: DO-41 is the axial through-hole package configuration for this zener diode. Both the original and substitute parts use this identical package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: Are there any differences in lead material between the original and substitute parts?

A: The substitute part is designated as "BK TIN/LEAD," indicating tin/lead plating on the leads. This material specification does not affect electrical performance or substitution compatibility.

Q: Why is the original part classified as obsolete?

A: Obsolescence is a manufacturer designation indicating that the part is no longer in active production. The substitute part from Central Semiconductor Corp is actively manufactured, providing continued supply availability.

Q: Do both parts require identical storage and handling procedures?

A: Yes. Both parts share MSL 1 (Unlimited) moisture sensitivity classification, requiring identical storage conditions and handling protocols.

Q: What regulatory certifications apply to the substitute part?

A: The substitute part maintains REACH Unaffected status and EAR99 ECCN classification, identical to the original part. It is additionally ROHS3 compliant, meeting current environmental standards.

Q: Is the 3.6 V zener voltage specification critical for substitution?

A: Yes. The zener voltage is a primary functional parameter. The substitute part must maintain the identical 3.6 V nominal rating with ±5% tolerance to ensure proper voltage regulation in the circuit.

Q: Can the 1 W power rating be exceeded in the substitute part?

A: No. Both parts are rated for 1 W maximum power dissipation. Operating beyond this rating will result in component failure and potential circuit damage.