ZPY82-TR Equivalent & Substitute Parts

Part Overview

The ZPY82-TR is a Zener diode rated at 82 V with 1.3 W power dissipation, manufactured by Vishay General Semiconductor - Diodes Division in a through-hole DO-204AL (DO-41) axial package. This component is classified as obsolete, indicating discontinuation from the original manufacturer. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

ZPY82-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 1056ZPY82-TR Datasheet

Current PartRFQ

1N3042B-1

Microchip TechnologyIn Stock: 8231N3042B-1 Datasheet

MFR RecommendedRFQ

1N4762AUR

Microchip TechnologyIn Stock: 9571N4762AUR Datasheet

MFR RecommendedRFQ

1N5947DG

Microsemi CorporationIn Stock: 7821N5947DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZPY82-TR is determined by the following critical parameters:

Primary Matching Criteria:

• Zener voltage: 82 V nominal
• Voltage tolerance: ±5% or tighter
• Power rating: equal to or greater than 1.3 W
• Mounting type: through-hole configuration
• Package type: DO-204AL (DO-41) axial package

Secondary Compatibility Factors:

• Impedance characteristics
• Reverse leakage current specifications
• Operating temperature range
• RoHS and REACH compliance status

The substitute parts listed below satisfy the primary matching criteria. Variations in impedance, leakage current, and compliance certifications are noted in the parameter comparison table to enable informed selection based on application requirements.

Parameter Comparison

Engineering Selection Recommendations

1N3042B-1 (Microchip Technology)

This substitute maintains through-hole DO-204AL (DO-41) axial package compatibility with the ZPY82-TR. The 1N3042B-1 delivers 1 W power rating, which is lower than the original 1.3 W specification. This part is suitable for applications where the 1.3 W power dissipation is not a critical design constraint. The part is currently in active production status, ensuring long-term availability. However, this substitute is RoHS non-compliant, which may present restrictions in certain regulatory environments.

1N4762AUR (Microchip Technology)

This substitute is a surface-mount variant in DO-213AB (MELF glass) package, fundamentally incompatible with through-hole PCB designs requiring the DO-204AL (DO-41) axial package. The 1N4762AUR is not recommended as a direct substitute for the ZPY82-TR in through-hole applications. This part is suitable only for new designs utilizing surface-mount assembly processes.

1N5947DG (Microsemi Corporation)

This substitute maintains through-hole DO-204AL (DO-41) axial package compatibility with the ZPY82-TR. The 1N5947DG delivers 1.25 W power rating, approaching the original 1.3 W specification. This part features tighter voltage tolerance (±1% versus ±5%), lower reverse leakage current (1 µA @ 62.2 V), and extended operating temperature range (-65°C to 175°C). The 1N5947DG is currently in active production status. Like the 1N3042B-1, this substitute is RoHS non-compliant.

Frequently Asked Questions (FAQ)

Q: Can the 1N3042B-1 replace the ZPY82-TR in all applications?

A: The 1N3042B-1 is mechanically and electrically compatible in terms of zener voltage and package type. However, the power rating is reduced from 1.3 W to 1 W. Applications requiring the full 1.3 W dissipation capacity must evaluate whether the lower power rating meets thermal and electrical requirements.

Q: Why is the 1N4762AUR listed as a substitute if it uses a different package?

A: The 1N4762AUR is included in the substitute list because it matches the 82 V zener voltage and ±5% tolerance specifications. However, its DO-213AB (MELF) surface-mount package makes it incompatible with through-hole PCB designs. This part is applicable only for new designs or PCB redesigns incorporating surface-mount assembly.

Q: What is the significance of the impedance difference between the ZPY82-TR and the substitute parts?

A: The ZPY82-TR exhibits 1 Ohm maximum impedance, while the substitute parts (1N3042B-1, 1N4762AUR, 1N5947DG) range from 160 to 200 Ohms. Lower impedance provides better voltage regulation characteristics. Applications sensitive to impedance performance must evaluate whether the higher impedance of substitute parts affects circuit stability and regulation accuracy.

Q: Are the substitute parts suitable for automotive applications?

A: The ZPY82-TR carries automotive grade classification with AEC-Q101 qualification. The substitute parts do not list automotive grade or AEC-Q101 qualification in their specifications. Applications requiring automotive-grade components must verify qualification status with the respective manufacturers before selection.

Q: What is the impact of RoHS compliance differences?

A: The ZPY82-TR is ROHS3 compliant, while all substitute parts are RoHS non-compliant. Applications subject to RoHS regulations or customer requirements for RoHS compliance cannot use the listed substitute parts without regulatory review and approval.

Q: Which substitute part provides the closest electrical match to the ZPY82-TR?

A: The 1N5947DG provides the closest electrical match, with 1.25 W power rating (versus 1.3 W), tighter voltage tolerance (±1% versus ±5%), and lower reverse leakage current. For through-hole applications, the 1N5947DG is the preferred substitute when power rating and impedance characteristics are acceptable.

Q: Can reverse leakage current differences affect circuit performance?

A: The ZPY82-TR specifies 500 nA reverse leakage at 6 V, while substitute parts specify leakage at 62.2 V. Direct comparison is not possible due to different measurement conditions. Applications sensitive to leakage current must evaluate the specified values at their operating voltage conditions.