FR501-TP Equivalent & Substitute Parts

Part Overview

The FR501-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50V DC reverse voltage and 5A average rectified current in a DO-201AD axial through-hole package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement continuity. The FR501-TP operates across a junction temperature range of -55°C to 150°C and demonstrates fast recovery characteristics with a reverse recovery time of 150 ns.

Substiute Parts

FR501-TP

Micro Commercial CoIn Stock: 1109FR501-TP Datasheet

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UG4A-M3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1195UG4A-M3/54 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FR501-TP is determined by equivalence in the following critical parameters:

Mandatory Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 50V minimum
• Package / Case: DO-201AD, Axial
• Mounting Type: Through Hole
• Technology: Standard rectifier diode

Allowable Variation Parameters:

• Current - Average Rectified (Io): Substitute must equal or exceed 5A rating
• Voltage - Forward (Vf): Substitute forward voltage must not exceed application requirements
• Reverse Recovery Time (trr): Substitute must support fast recovery characteristics
• Current - Reverse Leakage: Lower leakage is acceptable
• Operating Temperature Range: Must encompass -55°C to 150°C minimum

The substitute part UG4A-M3/54 meets the mandatory equivalence criteria with identical voltage rating and package configuration. The current rating of 4A in the substitute represents a design consideration requiring application-level verification of load requirements.

Parameter Comparison

Engineering Selection Recommendations

The UG4A-M3/54 is an active equivalent for the obsolete FR501-TP based on identical voltage rating (50V), package configuration (DO-201AD axial), and mounting type (through hole). Both components maintain ROHS3 compliance and unlimited moisture sensitivity classification.

The primary design consideration is the current rating differential: the FR501-TP is rated for 5A average rectified current, while the UG4A-M3/54 is rated for 4A. Selection of the UG4A-M3/54 is appropriate for applications where the sustained rectified current does not exceed 4A. For applications requiring the full 5A capability of the original FR501-TP, alternative substitutes with equivalent or higher current ratings must be evaluated.

The UG4A-M3/54 demonstrates superior reverse recovery time (30 ns versus 150 ns) and lower reverse leakage current (5 µA versus 10 µA), both favorable characteristics for rectification performance. Forward voltage at rated current is lower in the substitute (950 mV @ 4A versus 1.35 V @ 5A), reducing power dissipation in equivalent current applications.

Frequently Asked Questions (FAQ)

Q: Can the UG4A-M3/54 directly replace the FR501-TP in all applications?

A: The UG4A-M3/54 is a direct mechanical and electrical substitute for applications where the average rectified current does not exceed 4A. The identical 50V voltage rating, DO-201AD package, and through-hole mounting enable direct board-level substitution. Applications requiring sustained 5A operation require evaluation of alternative parts with higher current ratings.

Q: What is the significance of the current rating difference between these parts?

A: The FR501-TP supports 5A average rectified current, while the UG4A-M3/54 supports 4A. This represents a 20% reduction in current capacity. The appropriate substitute depends on the actual circuit current requirements. If the circuit operates at or below 4A, the UG4A-M3/54 is suitable. If sustained operation above 4A is required, alternative substitutes must be selected.

Q: Are the package and mounting configurations identical?

A: Yes. Both the FR501-TP and UG4A-M3/54 use the DO-201AD axial package with through-hole mounting. No board layout modifications are required for physical substitution.

Q: What is the impact of the reverse recovery time difference?

A: The UG4A-M3/54 exhibits a reverse recovery time of 30 ns compared to 150 ns for the FR501-TP. This faster recovery characteristic reduces switching losses and improves efficiency in high-frequency rectification applications. This represents an improvement over the original part.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the FR501-TP and UG4A-M3/54 are ROHS3 compliant with MSL classification of 1 (unlimited). Both carry EAR99 ECCN classification and identical HTSUS codes (8541.10.0080).

Q: What is the difference in forward voltage characteristics?

A: The FR501-TP exhibits 1.35V forward voltage at 5A, while the UG4A-M3/54 exhibits 950 mV forward voltage at 4A. At equivalent current levels, the UG4A-M3/54 demonstrates lower forward voltage drop, resulting in reduced power dissipation and improved thermal performance.

Q: Is the UG4A-M3/54 available in the same packaging format as the FR501-TP?

A: The UG4A-M3/54 is supplied in Tape & Reel (TR) packaging, while the FR501-TP inventory status does not specify packaging format. Both components use identical DO-201AD component packaging. Tape & Reel format is standard for active production components and is compatible with automated assembly processes.