1N4732A-T Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4732A-T is a 4.7 V Zener diode rated for 1.3 W maximum power dissipation in a DO-41 through-hole package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is qualified to AEC-Q101 automotive standards and complies with ROHS3 regulations.

The 1N4732A-T is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements. Active alternatives with identical electrical specifications and compatible packaging are available.

Substiute Parts

1N4732A-T

Vishay General Semiconductor - Diodes DivisionIn Stock: 9661N4732A-T Datasheet

Current PartRFQ

1N4732A-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 201661N4732A-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N4732A-T is determined by the following critical parameters:

1. Zener Voltage (Nominal): 4.7 V with ±5% tolerance
2. Power Dissipation Rating: 1.3 W maximum
3. Reverse Leakage Current: 10 µA @ 1 V
4. Forward Voltage: 1.2 V maximum @ 200 mA
5. Operating Temperature: 175°C maximum junction temperature
6. Package Type: DO-41 through-hole axial configuration
7. Automotive Grade: AEC-Q101 qualification required
8. RoHS Compliance: ROHS3 compliant

The 1N4732A-TR meets all these criteria and is electrically and mechanically interchangeable with the 1N4732A-T. The primary difference is packaging format (Cut Tape versus bulk) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The 1N4732A-TR is a direct functional equivalent to the 1N4732A-T. Both components share identical electrical specifications, thermal ratings, and automotive-grade qualifications. The 1N4732A-TR is the recommended substitute due to its active product status and continued availability.

Selection between these parts should be based on:

1. Supply Chain Requirements: The 1N4732A-TR is actively manufactured and stocked (20,151 pcs available), whereas the 1N4732A-T is obsolete.
2. Packaging Format: The 1N4732A-T is supplied in bulk format, while the 1N4732A-TR is supplied in Cut Tape (CT) format. Procurement and assembly processes must accommodate the selected packaging.
3. Compliance Verification: Both parts maintain AEC-Q101 automotive qualification and ROHS3 compliance, satisfying regulatory requirements for automotive and industrial applications.
4. Thermal Performance: Both components operate at identical maximum junction temperatures (175°C) and are suitable for equivalent thermal environments.

Frequently Asked Questions (FAQ)

Q: Can the 1N4732A-TR be used as a direct replacement for the 1N4732A-T in existing designs?

A: Yes. The 1N4732A-TR is electrically and mechanically identical to the 1N4732A-T. All electrical parameters, thermal ratings, package dimensions, and pin configurations are equivalent. The component can be substituted without circuit modification.

Q: What is the difference between the 1N4732A-T and 1N4732A-TR?

A: The primary differences are product status and packaging format. The 1N4732A-T is obsolete and supplied in bulk packaging. The 1N4732A-TR is an active product supplied in Cut Tape (CT) format. Electrical specifications and performance characteristics are identical.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the 1N4732A-T and 1N4732A-TR carry AEC-Q101 automotive qualification and are suitable for automotive-grade circuit designs.

Q: Does the impedance specification differ between these parts?

A: The impedance (Zzt) maximum specification differs: 1N4732A-T specifies 500 Ohms, while 1N4732A-TR specifies 8 Ohms. This represents an improvement in the substitute part. Both values remain within acceptable operating parameters for typical 4.7 V Zener diode applications.

Q: Are there any moisture sensitivity concerns with either part?

A: No. Both components carry Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: What packaging considerations apply when switching from 1N4732A-T to 1N4732A-TR?

A: The 1N4732A-T is supplied in bulk format, while the 1N4732A-TR is supplied in Cut Tape (CT) format. Assembly and procurement workflows must be adjusted accordingly. Both maintain identical DO-41 through-hole package dimensions and pin configurations.