FESB8ATHE3_A/P Equivalent & Substitute Parts

Part Overview

The FESB8ATHE3_A/P is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50 V DC reverse voltage and 8 A average rectified current in a surface mount TO-263AB (D2PAK) package. This component is classified as Last Time Buy, indicating discontinued production with limited inventory availability. Identification of equivalent and substitute parts is necessary to ensure design continuity and procurement flexibility for applications requiring this diode specification or compatible alternatives.

Substiute Parts

FESB8ATHE3_A/P

Vishay General Semiconductor - Diodes DivisionIn Stock: 790FESB8ATHE3_A/P Datasheet

Current PartRFQ

FESB8DTHM3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 979FESB8DTHM3/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FESB8ATHE3_A/P is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Current - Average Rectified (Io): 8 A minimum
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 150°C minimum
• Grade: Automotive
• Qualification: AEC-Q101

Allowable Variation Parameters:

• Voltage - DC Reverse (Vr) (Max): Equal or greater than 50 V
• Voltage - Forward (Vf) (Max) @ If: Equal or less than 950 mV @ 8 A
• Reverse Recovery Time (trr): Equal or less than 35 ns
• Current - Reverse Leakage @ Vr: Equal or less than 10 µA

Substitute parts must maintain identical package geometry, mounting technology, and automotive qualification status. Voltage ratings may be increased without functional degradation in applications designed for 50 V operation. Forward voltage and reverse recovery characteristics must not exceed specified maximums to preserve circuit performance.

Parameter Comparison

Engineering Selection Recommendations

The FESB8DTHM3/I is a direct substitute for the FESB8ATHE3_A/P based on the following engineering criteria:

Compliance and Certification: Both parts maintain identical automotive grade classification and AEC-Q101 qualification, ensuring compliance with automotive reliability standards. The substitute part is currently in Active product status, providing long-term availability compared to the Last Time Buy status of the main part.

Electrical Performance: The substitute part maintains identical forward voltage drop (950 mV @ 8 A), reverse recovery time (35 ns), and capacitance characteristics (85 pF @ 4V, 1MHz). The increased reverse voltage rating (200 V versus 50 V) provides enhanced overvoltage margin without degrading performance in 50 V applications.

Package and Thermal Compatibility: Both parts utilize identical TO-263AB (D2PAK) surface mount packaging with identical thermal and mechanical characteristics. Operating temperature range remains -55°C to 150°C, ensuring thermal compatibility in all specified environments.

Procurement Advantage: The substitute part offers significantly higher inventory availability (888 Pcs versus 779 Pcs) and active product status, reducing supply chain risk for ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can the FESB8DTHM3/I replace the FESB8ATHE3_A/P in existing designs without circuit modification?

A: Yes. The substitute part maintains identical electrical characteristics for forward voltage, reverse recovery time, and current rating. The higher reverse voltage rating (200 V) is compatible with 50 V circuit designs and provides additional overvoltage protection margin.

Q: Are there any thermal or mounting differences between these parts?

A: No. Both parts use identical TO-263AB (D2PAK) surface mount packages with identical lead configurations, thermal resistance characteristics, and PCB footprints. No layout or assembly process changes are required.

Q: Does the higher voltage rating of the substitute part affect circuit performance?

A: No. The substitute part's 200 V reverse voltage rating does not alter forward voltage drop, switching speed, or leakage current characteristics. Applications designed for 50 V operation benefit from increased voltage margin without performance degradation.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the FESB8ATHE3_A/P and FESB8DTHM3/I carry Automotive grade classification and AEC-Q101 qualification, meeting identical automotive reliability and quality standards.

Q: What is the primary reason to transition from the main part to the substitute?

A: The FESB8ATHE3_A/P is classified as Last Time Buy with limited inventory. The FESB8DTHM3/I is in Active product status with higher inventory availability, ensuring long-term supply continuity for production requirements.

Q: Are there any RoHS or REACH compliance differences?

A: The main part is specified as ROHS3 Compliant and REACH Unaffected. Compliance status for the substitute part should be verified through the manufacturer's current documentation for the FESB8DTHM3/I.