PR1503S-B Equivalent & Substitute Parts

Part Overview

The PR1503S-B is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 200 V DC reverse voltage and 1.5 A average rectified current in a through-hole DO-41 package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating the through-hole axial package format.

Substiute Parts

PR1503S-B

Diodes IncorporatedIn Stock: 954PR1503S-B Datasheet

Current PartRFQ

1N3611GP-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 7571N3611GP-E3/73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PR1503S-B is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must maintain a DC reverse voltage rating of 200 V or greater to ensure safe operation across the full specified voltage range.

Current Rating: The substitute part must support an average rectified current of 1.5 A or greater. Parts rated below 1.5 A are not suitable for direct substitution.

Package Format: The substitute part must be housed in a through-hole axial package (DO-41 or DO-204AL equivalent) to maintain mechanical compatibility with existing printed circuit board layouts.

Operating Temperature Range: The substitute part must support the junction temperature range of -65°C to 150°C or wider to ensure reliable operation across the specified thermal envelope.

Compliance: The substitute part must maintain RoHS3 compliance and EAR99 export classification to satisfy regulatory and procurement requirements.

The 1N3611GP-E3/73 meets these substitution criteria with a 200 V rating, though its 1 A current rating is lower than the PR1503S-B specification. This part is suitable only in applications where the actual operating current does not exceed 1 A.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The PR1503S-B is classified as obsolete, while the 1N3611GP-E3/73 maintains active production status. Selection of the active substitute part ensures long-term availability and supply chain continuity.

Compliance Alignment: Both parts maintain ROHS3 compliance and EAR99 export classification, satisfying regulatory requirements for equivalent procurement.

Current Rating Limitation: The 1N3611GP-E3/73 is rated for 1 A average rectified current, which is 0.5 A below the PR1503S-B specification of 1.5 A. This substitute is suitable only for applications where the actual operating current does not exceed 1 A. Applications requiring the full 1.5 A rating require alternative parts not listed in the provided substitute data.

Recovery Speed Trade-off: The 1N3611GP-E3/73 exhibits a reverse recovery time of 2 µs compared to the PR1503S-B at 150 ns. This slower recovery characteristic may impact performance in high-frequency switching applications. Standard recovery speed is appropriate for linear rectification and low-frequency applications.

Temperature Range Enhancement: The 1N3611GP-E3/73 supports an extended junction temperature range to 175°C, providing additional thermal margin beyond the PR1503S-B specification of 150°C.

Frequently Asked Questions (FAQ)

Q: Can the 1N3611GP-E3/73 directly replace the PR1503S-B in all applications?

A: No. The 1N3611GP-E3/73 is rated for 1 A average rectified current, while the PR1503S-B is rated for 1.5 A. Direct substitution is valid only in applications where the actual operating current does not exceed 1 A. Applications requiring 1.5 A operation require alternative parts.

Q: What is the significance of the different reverse recovery times?

A: The PR1503S-B has a reverse recovery time of 150 ns (fast recovery), while the 1N3611GP-E3/73 has 2 µs (standard recovery). Fast recovery diodes are preferred in high-frequency switching circuits. Standard recovery diodes are suitable for linear rectification and low-frequency applications. Application requirements determine which recovery speed is appropriate.

Q: Are the DO-41 and DO-204AL packages mechanically identical?

A: The DO-41 and DO-204AL designations refer to the same through-hole axial package format. Both the PR1503S-B and 1N3611GP-E3/73 are available in this package, ensuring mechanical compatibility with existing circuit board layouts.

Q: Does the extended temperature range of the 1N3611GP-E3/73 provide any advantage?

A: The 1N3611GP-E3/73 supports operation to 175°C junction temperature, compared to 150°C for the PR1503S-B. This extended range provides additional thermal margin in applications operating near the upper temperature limit, though it does not change the electrical performance at standard operating temperatures.

Q: Why is the PR1503S-B classified as obsolete?

A: Obsolete status indicates that the manufacturer has discontinued production. The 1N3611GP-E3/73 is an active product with ongoing manufacturing support, making it the preferred choice for new designs and ongoing procurement.

Q: What compliance certifications apply to both parts?

A: Both the PR1503S-B and 1N3611GP-E3/73 are ROHS3 compliant and classified as EAR99 for export purposes. Both parts carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture handling requirements.