ZPY82-TAP Equivalent & Substitute Parts

Part Overview

The ZPY82-TAP is a Zener diode rated at 82 V nominal voltage with 1.3 W maximum power dissipation, manufactured by Vishay General Semiconductor - Diodes Division. The device is packaged in a DO-204AL (DO-41) through-hole axial configuration and is qualified to AEC-Q101 automotive standards. The ZPY82-TAP is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design support and procurement requirements. Substitute parts must maintain electrical compatibility across voltage regulation, power handling, and thermal operating ranges while accommodating available packaging options.

Key Parameters

Parameter	ZPY82-TAP
Voltage - Zener (Nom) (Vz)	82 V
Tolerance	±5%
Power - Max	1.3 W
Impedance (Max) (Zzt)	1 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 6 V
Operating Temperature	175°C
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Product Status	Obsolete
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution of the ZPY82-TAP is determined by the following critical electrical and mechanical parameters:

Voltage Compatibility: All substitute parts maintain the 82 V nominal Zener voltage specification, ensuring functional equivalence in voltage regulation circuits.

Power Dissipation: The ZPY82-TAP specifies 1.3 W maximum power. Substitute parts rated at 1 W, 1.25 W, or higher satisfy power requirements for applications within the original specification envelope.

Tolerance: The ZPY82-TAP specifies ±5% voltage tolerance. Substitutes with ±5% or tighter tolerance (±2%) maintain or exceed voltage regulation precision. Substitutes with ±10% tolerance represent a relaxation of this specification.

Mounting Configuration: The ZPY82-TAP uses through-hole DO-204AL (DO-41) axial packaging. Substitutes maintaining this package type ensure direct mechanical compatibility. The 1N4762AUR substitute uses DO-213AB surface-mount packaging and requires circuit board redesign.

Operating Temperature Range: The ZPY82-TAP specifies a maximum operating temperature of 175°C. Substitute parts with extended temperature ranges (-55°C to 175°C, -65°C to 175°C) provide equivalent or superior thermal performance.

Impedance: The ZPY82-TAP specifies 1 Ohm maximum impedance. Substitute parts with 160 to 200 Ohm impedance represent acceptable variations within standard Zener diode performance parameters.

Parameter Comparison

Parameter	ZPY82-TAP	1N3042B-1	1N4762 G	1N4762AUR	1N5947CG
Manufacturer	Vishay	Microchip Technology	Microsemi Corporation	Microchip Technology	Microsemi Corporation
Voltage - Zener (Nom) (Vz)	82 V	82 V	82 V	82 V	82 V
Tolerance	±5%	±5%	±10%	±5%	±2%
Power - Max	1.3 W	1 W	1 W	1 W	1.25 W
Impedance (Max) (Zzt)	1 Ohms	200 Ohms	200 Ohms	200 Ohms	160 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 6 V	10 µA @ 62.2 V	5 µA @ 62.2 V	5 µA @ 62.2 V	1 µA @ 62.2 V
Operating Temperature	175°C	-55°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Surface Mount	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-213AB, MELF	DO-204AL, DO-41, Axial
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

For Direct Through-Hole Replacement (No Board Redesign):

The 1N5947CG (Microsemi Corporation) provides the closest functional match to the ZPY82-TAP. This part maintains 82 V nominal voltage, through-hole DO-204AL (DO-41) axial packaging, and active product status. The 1N5947CG offers superior voltage tolerance (±2% versus ±5%), adequate power rating (1.25 W versus 1.3 W), and extended operating temperature range (-65°C to 175°C). The part is currently in stock with 673 units available.

The 1N3042B-1 (Microchip Technology) and 1N4762 G (Microsemi Corporation) are functionally equivalent alternatives. Both maintain 82 V voltage specification and through-hole packaging. The 1N3042B-1 provides ±5% tolerance matching the original specification. The 1N4762 G operates across an extended temperature range (-65°C to 175°C) but specifies ±10% tolerance. Both parts are active and in stock.

For Surface-Mount Applications:

The 1N4762AUR (Microchip Technology) is a surface-mount variant rated at 82 V, 1 W, with ±5% tolerance and DO-213AB (MELF) packaging. This part requires circuit board redesign and is suitable only for new designs or board revisions incorporating surface-mount technology.

Compliance Considerations:

The ZPY82-TAP is ROHS3 compliant and AEC-Q101 qualified for automotive applications. All substitute parts are RoHS non-compliant. Applications requiring RoHS compliance or automotive qualification require verification against specific procurement standards. The ZPY82-TAP's automotive grade and AEC-Q101 qualification are not matched by the substitute parts listed.

Frequently Asked Questions (FAQ)

Q: Can the 1N4762AUR substitute for the ZPY82-TAP in existing designs?

A: The 1N4762AUR is electrically equivalent at 82 V, 1 W, but uses DO-213AB surface-mount packaging instead of the through-hole DO-204AL (DO-41) package. Direct substitution requires circuit board redesign. For existing through-hole designs, select 1N5947CG, 1N3042B-1, or 1N4762 G.

Q: What is the impact of the ±10% tolerance specification on the 1N4762 G?

A: The 1N4762 G specifies ±10% voltage tolerance compared to the ZPY82-TAP's ±5%. This represents a relaxation of voltage regulation precision. Applications requiring tighter voltage tolerance should select 1N5947CG (±2%) or 1N3042B-1 (±5%).

Q: Are the substitute parts suitable for automotive applications?

A: The ZPY82-TAP carries AEC-Q101 automotive qualification. The substitute parts listed do not include automotive qualification specifications. Automotive applications require verification against specific procurement and qualification requirements.

Q: What is the significance of impedance differences between the ZPY82-TAP and substitute parts?

A: The ZPY82-TAP specifies 1 Ohm maximum impedance, while substitute parts specify 160 to 200 Ohms. Impedance affects transient response and noise filtering characteristics. Applications sensitive to high-frequency transients should evaluate impedance specifications against circuit requirements.

Q: Can the 1N5947CG handle the full 1.3 W power specification of the ZPY82-TAP?

A: The 1N5947CG is rated at 1.25 W maximum power dissipation. Applications requiring sustained operation at 1.3 W exceed this rating. For applications consistently operating above 1.25 W, the ZPY82-TAP's 1.3 W rating provides additional margin. The 1N5947CG is suitable for applications operating within its 1.25 W specification.

Q: What is the reverse leakage current difference between the ZPY82-TAP and substitute parts?

A: The ZPY82-TAP specifies 500 nA reverse leakage at 6 V. Substitute parts specify leakage at 62.2 V, making direct comparison difficult. The 1N5947CG specifies 1 µA at 62.2 V, representing superior leakage performance. Applications sensitive to reverse leakage should evaluate specifications at operating voltage conditions.

Q: Are all substitute parts currently in stock?

A: Yes. 1N3042B-1 (726 units), 1N4762 G (691 units), 1N4762AUR (855 units), and 1N5947CG (673 units) are all available as new original stock.

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