FESE8HT-E3/45 Equivalent & Substitute Parts

Part Overview

The FESE8HT-E3/45 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 500 V DC reverse voltage and 8 A average rectified current in a Through Hole TO-220AC package. This part is classified as Obsolete, making identification of equivalent and substitute components necessary for ongoing design support, maintenance, and production continuity. The part exhibits fast recovery characteristics with a reverse recovery time of 50 ns and operates across a junction temperature range of -55°C to 150°C.

Substiute Parts

FESE8HT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 970FESE8HT-E3/45 Datasheet

Current PartRFQ

VS-ETU0805-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 986VS-ETU0805-M3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FESE8HT-E3/45 is determined by electrical and mechanical parameter equivalence within the general-purpose rectifier diode category. The following parameters establish substitution validity:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 500 V
• Current - Average Rectified (Io): 8 A
• Reverse Recovery Time (trr): 50 ns
• Mounting Type: Through Hole
• Package / Case: TO-220-2

Acceptable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Lower values indicate improved performance
• Current - Reverse Leakage @ Vr: Lower values indicate improved performance
• Operating Temperature - Junction: Extended ranges provide design flexibility
• RoHS Status: ROHS3 Compliant equivalence required

The substitute part VS-ETU0805-M3 meets all critical matching parameters and demonstrates improved performance characteristics in forward voltage and reverse leakage specifications.

Parameter Comparison

Engineering Selection Recommendations

The VS-ETU0805-M3 serves as a direct substitute for the obsolete FESE8HT-E3/45 based on electrical and mechanical parameter equivalence. Both components are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical voltage and current ratings, reverse recovery time, and TO-220-2 package configuration.

The VS-ETU0805-M3 is classified as Active product status, ensuring ongoing availability and manufacturing support. Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for equivalent component selection.

The VS-ETU0805-M3 demonstrates improved performance characteristics with reduced forward voltage drop (1.25 V versus 1.5 V at 8 A) and lower reverse leakage current (9 µA versus 10 µA at 500 V). The extended operating temperature range (-65°C to 175°C versus -55°C to 150°C) provides additional design margin for thermal applications.

Frequently Asked Questions (FAQ)

Q: Can VS-ETU0805-M3 be used as a direct replacement for FESE8HT-E3/45 in existing designs?

A: Yes. Both components share identical voltage ratings (500 V), current ratings (8 A), reverse recovery time (50 ns), and TO-220-2 package configuration. No circuit modifications are required for substitution.

Q: What are the differences between these two diodes?

A: The primary differences are product status and performance characteristics. The FESE8HT-E3/45 is Obsolete, while VS-ETU0805-M3 is Active. The VS-ETU0805-M3 exhibits lower forward voltage drop (1.25 V versus 1.5 V at 8 A), lower reverse leakage current (9 µA versus 10 µA at 500 V), and an extended operating temperature range (-65°C to 175°C versus -55°C to 150°C).

Q: Are the packages identical?

A: Yes. Both components use the TO-220-2 package with Through Hole mounting type, ensuring mechanical and thermal compatibility in PCB layouts.

Q: Do both parts meet the same compliance standards?

A: Yes. Both FESE8HT-E3/45 and VS-ETU0805-M3 are ROHS3 Compliant and REACH Unaffected, meeting equivalent regulatory requirements.

Q: What is the difference between the packaging specifications?

A: The FESE8HT-E3/45 does not specify packaging type in the provided data. The VS-ETU0805-M3 is supplied in Tube packaging. Both components are identical in electrical and mechanical specifications; packaging format does not affect component performance or substitution validity.

Q: Why is the FESE8HT-E3/45 classified as Obsolete?

A: Obsolete status indicates the part is no longer in active production. The VS-ETU0805-M3, classified as Active, represents the current manufacturing equivalent from the same manufacturer.