FESB16AT-E3/45 Equivalent & Substitute Parts

Part Overview

The FESB16AT-E3/45 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount device is rated for 50 V DC reverse voltage and 16 A average rectified current in a TO-263AB (D2PAK) package. The part is currently in Last Time Buy status, indicating discontinued production. Identification of equivalent and substitute parts is necessary to ensure continued design support and procurement availability for new production runs and field replacements.

Substiute Parts

FESB16AT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1016FESB16AT-E3/45 Datasheet

Current PartRFQ

FESB16DT-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 873FESB16DT-M3/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FESB16AT-E3/45 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Current - Average Rectified (Io): 16 A (exact match required)
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -65°C ~ 150°C (exact match required)
• Voltage - Forward (Vf) (Max) @ If: 975 mV @ 16 A (exact match required)
• Reverse Recovery Time (trr): 35 ns (exact match required)

Allowable Variation Parameters:

• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 50 V (higher voltage ratings are acceptable for lower-voltage applications)
• Current - Reverse Leakage @ Vr: Equal to or less than 10 µA (lower leakage is acceptable)

The FESB16DT-M3/I qualifies as a substitute part because it maintains all mandatory compatibility parameters while providing an elevated reverse voltage rating of 200 V, which is acceptable for applications designed for 50 V operation.

Parameter Comparison

Engineering Selection Recommendations

The FESB16DT-M3/I is a direct substitute for the FESB16AT-E3/45 based on the following engineering criteria:

Product Status Justification: The FESB16AT-E3/45 is designated Last Time Buy, indicating end-of-life status. The FESB16DT-M3/I is in Active production status, ensuring long-term availability and supply chain continuity.

Compliance and Certification: The FESB16DT-M3/I carries AEC-Q101 automotive qualification and Automotive grade designation, providing enhanced reliability documentation. Both parts are RoHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Electrical Compatibility: All critical electrical parameters match exactly between the two parts. The elevated reverse voltage rating of 200 V in the FESB16DT-M3/I presents no compatibility issues for applications designed for 50 V operation, as the part operates within the specified voltage envelope.

Physical and Thermal Compatibility: Package, mounting type, and operating temperature range are identical, ensuring direct PCB-level compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can the FESB16DT-M3/I be used as a direct replacement for the FESB16AT-E3/45 without circuit modification?

A: Yes. The FESB16DT-M3/I is electrically and mechanically compatible with the FESB16AT-E3/45. All critical parameters including current rating, forward voltage drop, recovery time, and package configuration are identical. The higher reverse voltage rating does not require circuit changes for applications designed for 50 V operation.

Q: What is the significance of the higher 200 V reverse voltage rating in the FESB16DT-M3/I?

A: The 200 V rating provides additional voltage margin beyond the 50 V specification of the original part. This does not affect performance in 50 V applications and may provide enhanced reliability in transient overvoltage conditions. The part remains fully compatible with the original circuit design.

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

A: No. Both parts share identical operating temperature range (-65°C ~ 150°C), forward voltage characteristics (975 mV @ 16 A), and reverse recovery time (35 ns). Thermal performance and switching characteristics are equivalent.

Q: Why is the FESB16DT-M3/I listed as Automotive grade while the original part is not?

A: The FESB16DT-M3/I includes AEC-Q101 automotive qualification, which represents additional qualification testing and documentation. This certification does not restrict use in non-automotive applications and provides enhanced reliability assurance for all end-use categories.

Q: Is the TO-263AB package identical between both parts?

A: Yes. Both parts use the TO-263-3, D2PAK (2 Leads + Tab), TO-263AB package. PCB footprints, lead spacing, and mounting requirements are identical, enabling direct component substitution without layout modification.

Q: What is the inventory status for each part?

A: The FESB16AT-E3/45 has 936 pieces in stock with Last Time Buy status. The FESB16DT-M3/I has 793 pieces in stock with Active product status, ensuring continued availability for future procurement.