RL203-AP Equivalent & Substitute Parts

Part Overview

The RL203-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 2 A average rectified current in a DO-15 through-hole package. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement continuity. The RL203-AP operates across a junction temperature range of -55°C to 150°C and complies with ROHS3 standards.

Substiute Parts

RL203-AP

Micro Commercial CoIn Stock: 1030RL203-AP Datasheet

Current PartRFQ

PR1503-T

Diodes IncorporatedIn Stock: 787PR1503-T Datasheet

SimilarRFQ

2A03G A0G

Taiwan Semiconductor CorporationIn Stock: 8592A03G A0G Datasheet

Parametric EquivalentRFQ

2A03GHA0G

Taiwan Semiconductor CorporationIn Stock: 11422A03GHA0G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RL203-AP are classified based on electrical parameter compatibility and mechanical package equivalence. The primary substitution criteria are:

Critical Parameters for Substitution:

• Voltage - DC Reverse (Vr) (Max): 200 V minimum
• Current - Average Rectified (Io): 2 A or greater
• Mounting Type: Through Hole
• Package / Case: DO-15 or DO-204AC compatible
• Operating Temperature Range: -55°C minimum to 150°C maximum

Substitution Categories:

Parametric Equivalents maintain identical electrical ratings (200 V, 2 A) with the same forward voltage characteristics and recovery speed classification. These parts are direct functional replacements.

Functional Substitutes meet or exceed the voltage and current requirements but may differ in secondary characteristics such as recovery speed or forward voltage at rated current. The PR1503-T operates at 1.5 A average rectified current, which is below the 2 A requirement of the main part; however, it maintains the 200 V reverse voltage rating and through-hole DO-15 package configuration.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Parametric Equivalents):

The 2A03G A0G and 2A03GHA0G from Taiwan Semiconductor Corporation are parametric equivalents to the RL203-AP. Both parts maintain identical electrical specifications: 200 V reverse voltage, 2 A average rectified current, 1 V forward voltage at 2 A, and standard recovery speed characteristics. Both are active products with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). The 2A03GHA0G variant includes automotive-grade qualification (AEC-Q101), suitable for applications requiring automotive-level reliability.

Secondary Substitute (Functional Substitute):

The PR1503-T from Diodes Incorporated is an active product with ROHS3 compliance. While it maintains the 200 V reverse voltage rating and through-hole DO-15 package configuration, the average rectified current is rated at 1.5 A, which is below the 2 A specification of the RL203-AP. The PR1503-T exhibits fast recovery characteristics (≤500ns) compared to the standard recovery (>500ns) of the main part, and forward voltage is specified at 1.2 V @ 1.5 A. This part is suitable for applications where the 1.5 A current rating is sufficient and where faster recovery characteristics provide circuit benefits.

Compliance Considerations:

All substitute parts comply with ROHS3 standards and carry EAR99 ECCN classification. The 2A03GHA0G provides additional automotive qualification through AEC-Q101 certification, appropriate for automotive and high-reliability applications.

Frequently Asked Questions (FAQ)

Q: Can the PR1503-T directly replace the RL203-AP in all applications?

A: The PR1503-T is not a direct replacement for all applications. While both parts share the same 200 V reverse voltage rating and DO-15 package, the PR1503-T is rated for 1.5 A average rectified current compared to the RL203-AP's 2 A rating. Applications requiring the full 2 A current capacity must use the 2A03G A0G or 2A03GHA0G instead.

Q: What is the difference between the 2A03G A0G and 2A03GHA0G?

A: Both parts are parametric equivalents with identical electrical specifications. The 2A03GHA0G includes automotive-grade qualification (AEC-Q101) and is designated for automotive applications. The 2A03G A0G is suitable for general industrial and commercial applications. Selection depends on application requirements and qualification standards.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts are available in through-hole DO-15 (DO-204AC) axial packages, matching the mechanical configuration of the RL203-AP. The PR1503-T is supplied in Tape & Reel (TR) packaging, while the Taiwan Semiconductor parts do not specify packaging format in the provided data.

Q: Why is the RL203-AP classified as obsolete?

A: The RL203-AP is marked as obsolete by the manufacturer. Active equivalent products such as the 2A03G A0G and 2A03GHA0G from Taiwan Semiconductor Corporation provide identical electrical performance and are recommended for new designs and ongoing procurement.

Q: Do all substitute parts meet the same temperature operating range?

A: The RL203-AP, 2A03G A0G, and 2A03GHA0G operate across -55°C to 150°C. The PR1503-T extends the lower temperature limit to -65°C, providing a wider operating range suitable for applications requiring enhanced low-temperature performance.

Q: What is the significance of the reverse recovery time specification on the PR1503-T?

A: The PR1503-T specifies a reverse recovery time (trr) of 150 ns, indicating fast recovery characteristics. This is faster than the standard recovery (>500ns) of the RL203-AP. Fast recovery diodes reduce switching losses and are beneficial in high-frequency switching applications, though they may not be necessary for all circuit topologies.