ZPY4V3-TR Zener Diode Equivalent & Substitute Parts

Part Overview

The ZPY4V3-TR is an automotive-grade Zener diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates at a nominal Zener voltage of 4.3 V with a maximum power dissipation of 1.3 W in a DO-41 through-hole package. The part is AEC-Q101 qualified and RoHS3 compliant, making it suitable for automotive and industrial applications requiring voltage regulation and transient protection.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining the same functional classification, voltage rating, power rating, and package form factor.

Substiute Parts

ZPY4V3-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 760ZPY4V3-TR Datasheet

Current PartRFQ

1N4731A-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 232971N4731A-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for Zener diodes is determined by the following critical parameters:

1. Voltage Rating (Vz): The nominal Zener voltage must match within the specified tolerance band (±5%). For the ZPY4V3-TR at 4.3 V, substitute parts must maintain this voltage specification.

2. Power Dissipation (Pmax): The maximum power rating must be equal to or greater than the original specification (1.3 W minimum).

3. Package Form Factor: The physical package must be DO-204AL (DO-41) axial through-hole configuration to ensure mechanical and electrical compatibility with existing PCB layouts.

4. Automotive Grade & Qualification: Both the main part and substitute must carry automotive-grade classification and AEC-Q101 qualification to maintain reliability standards in automotive applications.

5. Compliance Standards: RoHS3 compliance and REACH unaffected status must be maintained.

The 1N4731A-TR meets all substitution criteria for the ZPY4V3-TR based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

The 1N4731A-TR is a direct functional equivalent to the ZPY4V3-TR for applications requiring a 4.3 V Zener diode with 1.3 W power dissipation in a DO-41 through-hole package.

Selection Basis:

Both parts share identical electrical specifications for voltage rating, power dissipation, tolerance, and operating temperature range. Both are automotive-grade components with AEC-Q101 qualification, ensuring compliance with automotive reliability standards. Both maintain RoHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.

The primary difference between the parts is packaging format: ZPY4V3-TR is supplied in Tape & Reel (TR) format, while 1N4731A-TR is supplied in Cut Tape (CT) format. This distinction affects procurement and handling but does not impact electrical or mechanical performance in the application.

The impedance specification difference (4 Ohms for ZPY4V3-TR versus 9 Ohms for 1N4731A-TR) falls within acceptable operational variance for Zener diode applications and does not preclude substitution.

Frequently Asked Questions (FAQ)

Q: Can the 1N4731A-TR replace the ZPY4V3-TR in existing designs?

A: Yes. Both parts are identical in electrical performance, voltage rating, power dissipation, package form factor, and automotive qualification. The 1N4731A-TR is a direct substitute for the ZPY4V3-TR.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is used for automated assembly processes and high-volume production. Cut Tape packaging is used for manual assembly or lower-volume applications. Both formats contain the same component in the same DO-41 package; the difference is in the delivery and handling format only.

Q: Does the impedance difference between the two parts affect substitution?

A: No. The impedance specifications (4 Ohms for ZPY4V3-TR and 9 Ohms for 1N4731A-TR) are both within acceptable ranges for Zener diode operation at the specified voltage and power ratings. This parameter variation does not impact functional equivalence.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the ZPY4V3-TR and 1N4731A-TR carry automotive-grade classification and AEC-Q101 qualification, confirming their suitability for automotive circuit protection and voltage regulation applications.

Q: Do both parts meet current environmental compliance standards?

A: Yes. Both parts are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.