PR1502S-B Equivalent & Substitute Parts

Part Overview

The PR1502S-B is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 100V DC reverse voltage and 1.5A average rectified current in a DO-41 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and production continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating packaging and availability constraints.

Substiute Parts

PR1502S-B

Diodes IncorporatedIn Stock: 908PR1502S-B Datasheet

Current PartRFQ

RGP10B-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 9590RGP10B-E3/54 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PR1502S-B is determined by the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: The substitute part must maintain a DC reverse voltage rating (Vr) of 100V or greater to ensure safe operation across the original design envelope.

Current Rating Compatibility: The substitute part current rating must equal or exceed the 1.5A average rectified current (Io) specification. Parts rated below 1.5A are not suitable for direct substitution.

Forward Voltage Characteristics: Forward voltage drop (Vf) at rated current must be evaluated for circuit performance impact. Variations in Vf affect power dissipation and circuit efficiency.

Recovery Speed Classification: Fast recovery characteristics (≤ 500ns for currents > 200mA) and reverse recovery time (trr) of 150ns establish switching performance requirements for the application.

Reverse Leakage Current: Leakage current specification of 5µA @ 100V defines acceptable off-state performance.

Package and Mounting: Physical compatibility requires through-hole mounting in DO-41 or DO-204AL packages with axial lead configuration.

Temperature Range: Operating junction temperature range must support the original -65°C to 150°C specification or exceed it.

Compliance and Status: Active product status and RoHS3 compliance ensure long-term availability and regulatory conformance.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility: The RGP10B-E3/54 is a functional equivalent for the PR1502S-B based on matched voltage rating, recovery speed, reverse recovery time, and leakage current specifications. Both components are RoHS3 compliant and support the same operating temperature minimum of -65°C.

Current Rating Consideration: The RGP10B-E3/54 is rated for 1.0A average rectified current, which is lower than the PR1502S-B specification of 1.5A. This difference requires circuit-level evaluation. If the application operates at or near 1.5A continuously, the substitute part may experience elevated junction temperatures and reduced reliability margin. Applications operating below 1.0A average current are suitable for direct substitution.

Forward Voltage Impact: The substitute part exhibits a forward voltage of 1.3V @ 1.0A compared to 1.2V @ 1.5A in the original part. This 0.1V increase affects power dissipation calculations and may impact circuit efficiency in low-voltage applications.

Temperature Range Extension: The RGP10B-E3/54 supports an extended junction temperature range to 175°C, providing additional thermal margin compared to the original 150°C maximum.

Product Status and Availability: The RGP10B-E3/54 maintains active product status with 9513 units in stock, ensuring long-term design support and procurement continuity. The PR1502S-B obsolete status necessitates transition to an active equivalent.

Compliance Alignment: Both parts maintain RoHS3 compliance and EAR99 export classification, supporting regulatory and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can the RGP10B-E3/54 directly replace the PR1502S-B in all applications?

A: Direct substitution is valid for applications where the average rectified current does not exceed 1.0A. Applications requiring sustained operation at 1.0A to 1.5A require thermal analysis to confirm the substitute part operates within acceptable junction temperature limits. The matched voltage rating, recovery speed, and leakage current specifications support functional equivalence within current rating constraints.

Q: What is the impact of the 0.1V forward voltage difference?

A: The RGP10B-E3/54 exhibits 1.3V forward voltage at 1.0A versus 1.2V at 1.5A for the PR1502S-B. In circuits where forward voltage drop directly affects output voltage or efficiency, this difference must be evaluated. Power dissipation increases proportionally with forward voltage; circuits operating at lower currents experience minimal impact.

Q: Are the DO-41 and DO-204AL package designations interchangeable?

A: Yes. Both the PR1502S-B and RGP10B-E3/54 are specified for DO-204AL, DO-41, and axial package configurations. These designations refer to the same physical package format with identical lead spacing and through-hole mounting requirements. PCB layouts designed for either part are mechanically compatible.

Q: Does the extended temperature range of the RGP10B-E3/54 provide additional design margin?

A: The RGP10B-E3/54 supports operation to 175°C junction temperature compared to 150°C for the PR1502S-B. This 25°C extension provides additional thermal margin in applications approaching maximum rated junction temperature. However, this advantage does not offset the lower current rating; thermal design must still account for the 1.0A current limit.

Q: What is the significance of the lower capacitance in the substitute part?

A: The RGP10B-E3/54 exhibits 15pF capacitance at 4V and 1MHz compared to 20pF for the PR1502S-B. This 5pF reduction has negligible impact on most rectifier applications. High-frequency switching circuits or precision timing applications should verify that the lower capacitance does not affect circuit performance, though the difference is typically insignificant at standard rectifier operating frequencies.

Q: Why is the substitute part available in Cut Tape packaging while the original is listed as bulk?

A: Packaging format differences reflect current manufacturing and distribution practices. Cut Tape (CT) packaging is standard for active production parts and supports automated assembly processes. The physical component and electrical specifications remain identical; packaging format does not affect electrical performance or mechanical compatibility.

Q: Is the REACH compliance status difference significant?

A: The PR1502S-B is listed as REACH Affected while the RGP10B-E3/54 is REACH Unaffected. For applications subject to REACH regulations, the substitute part provides simplified compliance documentation. For applications not subject to REACH requirements, this difference has no operational impact.