ZPY20-TAP Zener Diode Equivalent & Substitute Parts

Part Overview

The ZPY20-TAP is a 20V 1.3W Zener diode manufactured by Vishay General Semiconductor - Diodes Division, packaged in Tape & Box (TB) format with DO-204AL (DO-41) axial through-hole configuration. This component is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same voltage rating, power dissipation class, and package type, enabling procurement flexibility and supply chain continuity.

Substiute Parts

ZPY20-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 798ZPY20-TAP Datasheet

Current PartRFQ

1N4747A-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 15061N4747A-TAP Datasheet

DirectRFQ

1N4747A

Lumimax Optoelectronic TechnologyIn Stock: 152391N4747A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ZPY20-TAP are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Matching Parameters:

• Voltage - Zener (Nom): 20 V (exact match required)
• Tolerance: ±5% (exact match required)
• Package / Case: DO-204AL, DO-41, Axial (mechanical compatibility)
• Mounting Type: Through Hole (assembly compatibility)

Secondary Compatibility Parameters:

• Power - Max: 1.3 W or greater (equal or higher rating acceptable)
• Operating Temperature: 175°C minimum (equal or higher rating acceptable)
• RoHS Status: ROHS3 Compliant (regulatory compliance)

The ZPY20-TAP substitutes are grouped into two categories: Direct manufacturer equivalents from Vishay General Semiconductor - Diodes Division (1N4747A-TAP) and alternative manufacturer sources (1N4747A from Lumimax Optoelectronic Technology). Both maintain the 20V nominal voltage and ±5% tolerance specification with compatible through-hole axial packaging.

Parameter Comparison

Engineering Selection Recommendations

1N4747A-TAP (Vishay General Semiconductor - Diodes Division)

This substitute maintains full electrical and regulatory equivalence with the ZPY20-TAP. Both components share identical voltage rating (20V), tolerance (±5%), power rating (1.3W), operating temperature (175°C), automotive grade classification, and AEC-Q101 qualification. The primary difference is packaging format: 1N4747A-TAP is supplied in Cut Tape (CT) format versus Tape & Box (TB) for the main part. Both are ROHS3 compliant. This substitute is suitable for direct replacement in automotive and industrial applications requiring AEC-Q101 qualified components.

1N4747A (Lumimax Optoelectronic Technology)

This substitute maintains the critical electrical parameters: 20V nominal voltage, ±5% tolerance, and compatible through-hole axial package. However, the power rating is 1W versus 1.3W for the main part, representing a 23% reduction in maximum power dissipation. Operating temperature range extends to 200°C maximum. This component lacks automotive grade designation and AEC-Q101 qualification. The 1N4747A from Lumimax is suitable for general-purpose applications where automotive qualification is not required and power dissipation remains within the 1W limit.

Frequently Asked Questions (FAQ)

Q: Can 1N4747A-TAP be used as a direct replacement for ZPY20-TAP in automotive applications?

A: Yes. Both components are manufactured by Vishay General Semiconductor - Diodes Division with identical electrical specifications (20V, ±5%, 1.3W), operating temperature (175°C), automotive grade, and AEC-Q101 qualification. The packaging format difference (Cut Tape versus Tape & Box) does not affect electrical performance or mechanical compatibility in through-hole assembly.

Q: What is the difference between 1N4747A-TAP and 1N4747A from Lumimax?

A: Both share the same 20V nominal voltage and ±5% tolerance. Key differences include: power rating (1N4747A-TAP: 1.3W; Lumimax 1N4747A: 1W), automotive qualification (1N4747A-TAP: AEC-Q101 qualified; Lumimax: not qualified), and operating temperature range (1N4747A-TAP: 175°C; Lumimax: -65°C to 200°C). The Lumimax variant is suitable for non-automotive applications within the 1W power limit.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three components use DO-204AL (DO-41) axial through-hole package configuration, ensuring mechanical and assembly compatibility on PCBs designed for this package type.

Q: What is the significance of impedance differences between ZPY20-TAP (6 Ohms) and the substitutes (22 Ohms)?

A: Impedance (Zzt) affects transient response characteristics. The ZPY20-TAP has lower impedance (6 Ohms), providing faster transient response. The substitutes (22 Ohms) have higher impedance, resulting in slower transient response. This parameter must be evaluated against circuit requirements for voltage regulation and noise suppression performance.

Q: Can the Lumimax 1N4747A be used in circuits designed for 1.3W power dissipation?

A: No. The Lumimax 1N4747A has a maximum power rating of 1W, which is 23% lower than the 1.3W requirement. Using this component in circuits requiring 1.3W dissipation will exceed its thermal limits and reduce component reliability.

Q: Are there packaging considerations when switching from ZPY20-TAP to 1N4747A-TAP?

A: Yes. ZPY20-TAP is supplied in Tape & Box (TB) format, while 1N4747A-TAP is supplied in Cut Tape (CT) format. This affects bulk packaging and handling procedures but does not impact individual component performance or assembly compatibility.