RL253M-TP Equivalent & Substitute Parts

Part Overview

The RL253M-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 2.5 A average rectified current in a DO-15 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating the through-hole axial package format.

Substiute Parts

RL253M-TP

Micro Commercial CoIn Stock: 1182RL253M-TP Datasheet

Current PartRFQ

PR1503-T

Diodes IncorporatedIn Stock: 787PR1503-T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RL253M-TP is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must support a minimum DC reverse voltage (Vr) of 200 V to maintain circuit protection and reliability.

Current Rating: The substitute part must support the average rectified current (Io) requirement. The RL253M-TP is rated for 2.5 A; substitute parts with lower current ratings operate within reduced current envelopes.

Package and Mounting: Both the main part and substitute must use the DO-15 through-hole axial package to ensure mechanical compatibility with existing printed circuit board layouts and assembly processes.

Forward Voltage: Forward voltage drop (Vf) affects power dissipation and circuit performance; substitute parts with different Vf characteristics alter thermal and efficiency profiles.

Recovery Characteristics: Recovery speed classification (standard or fast recovery) and reverse recovery time (trr) influence switching behavior and electromagnetic compatibility.

Temperature Range: Operating temperature range must accommodate the application's thermal environment.

Compliance: RoHS3 compliance status ensures regulatory alignment for restricted substance requirements.

The PR1503-T meets the voltage, package, mounting, and compliance criteria and is listed as an active substitute for the RL253M-TP.

Parameter Comparison

Engineering Selection Recommendations

PR1503-T as Primary Substitute: The PR1503-T is an active product from Diodes Incorporated and meets the core substitution criteria of matching 200 V reverse voltage rating, DO-15 through-hole package, and ROHS3 compliance. The PR1503-T is suitable for applications where the average rectified current requirement does not exceed 1.5 A.

Current Rating Consideration: The PR1503-T is rated for 1.5 A average rectified current, which is lower than the RL253M-TP's 2.5 A rating. Applications requiring the full 2.5 A capacity must evaluate whether the reduced current rating of the substitute is acceptable for the intended circuit function.

Recovery Speed Difference: The PR1503-T features fast recovery characteristics (≤500 ns, trr = 150 ns) compared to the RL253M-TP's standard recovery (>500 ns). Fast recovery diodes exhibit lower reverse recovery time, which reduces switching losses and electromagnetic interference in high-frequency applications.

Temperature Range: The PR1503-T supports an extended lower temperature limit (-65°C versus -55°C), providing broader thermal operating range.

Product Status: The PR1503-T is an active product with current manufacturing and supply availability, eliminating obsolescence risk associated with the RL253M-TP.

Frequently Asked Questions (FAQ)

Q: Can the PR1503-T directly replace the RL253M-TP in all applications?

A: The PR1503-T is mechanically and electrically compatible for applications where the average rectified current does not exceed 1.5 A. Applications requiring sustained 2.5 A operation must evaluate alternative substitutes with higher current ratings or confirm that actual circuit current demands remain below 1.5 A.

Q: What is the significance of the recovery speed difference between standard and fast recovery?

A: Standard recovery diodes (>500 ns) exhibit longer reverse recovery time, resulting in higher switching losses and increased electromagnetic noise. Fast recovery diodes (≤500 ns) reduce these losses, making them suitable for switching power supplies and high-frequency rectification circuits. The PR1503-T's fast recovery characteristic may improve efficiency in such applications.

Q: Are the DO-15 packages of both parts identical?

A: Both the RL253M-TP and PR1503-T use the DO-204AC, DO-15 axial through-hole package. Physical dimensions and lead spacing are equivalent, ensuring direct mechanical compatibility on printed circuit boards designed for the original part.

Q: Does the forward voltage difference affect circuit performance?

A: The PR1503-T exhibits 1.2 V forward voltage at 1.5 A compared to the RL253M-TP's 1 V at 2.5 A. At equivalent current levels, forward voltage differences alter power dissipation and voltage drop across the diode. Circuit designs with tight voltage margin requirements must account for this difference.

Q: Are both parts RoHS compliant?

A: Yes, both the RL253M-TP and PR1503-T are ROHS3 compliant, meeting restricted substance requirements for lead-free and hazardous material elimination.

Q: What is the impact of the extended temperature range of the PR1503-T?

A: The PR1503-T supports operation from -65°C to 150°C, compared to the RL253M-TP's -55°C to 150°C range. The extended lower temperature limit provides operational margin for applications in cold environments or equipment with wide thermal operating specifications.