FESB16HT-E3/81 Equivalent & Substitute Parts

Part Overview

The FESB16HT-E3/81 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount device is rated for 500 V DC reverse voltage with 16 A average rectified current in a TO-263AB (D2PAK) package. The part is currently in Last Time Buy status, indicating production discontinuation. Identification of equivalent and substitute parts is necessary to ensure design continuity and procurement availability for new production runs and long-term support.

Substiute Parts

FESB16HT-E3/81

Vishay General Semiconductor - Diodes DivisionIn Stock: 1423FESB16HT-E3/81 Datasheet

Current PartRFQ

FESB16JT-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 751FESB16JT-M3/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FESB16HT-E3/81 is determined by electrical and mechanical compatibility within the following parameters:

Critical Substitution Parameters:

• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Current - Average Rectified (Io): 16 A minimum
• Voltage - DC Reverse (Vr) (Max): 500 V minimum
• Voltage - Forward (Vf) (Max) @ If: 1.5 V @ 16 A maximum
• Reverse Recovery Time (trr): 50 ns maximum
• Current - Reverse Leakage @ Vr: 10 µA maximum at rated voltage
• Operating Temperature - Junction: -65°C to 150°C minimum range
• Technology: Standard rectifier diode technology

The FESB16JT-M3/I qualifies as a substitute part because it maintains identical mechanical packaging, current rating, forward voltage characteristics, recovery time, leakage current specifications, and temperature range. The higher reverse voltage rating (600 V versus 500 V) provides enhanced voltage margin while remaining electrically compatible with the original design specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: FESB16JT-M3/I

The FESB16JT-M3/I is the recommended substitute for the FESB16HT-E3/81. This selection is based on the following engineering factors:

1. Electrical Compatibility: All critical electrical parameters match or exceed the original part specification. The 600 V reverse voltage rating provides additional design margin compared to the 500 V rating of the main part, while maintaining identical forward voltage drop, recovery time, and leakage current characteristics.

2. Mechanical Compatibility: Both parts use identical TO-263AB (D2PAK) surface mount packaging with two leads plus tab configuration, ensuring direct PCB footprint compatibility without layout modifications.

3. Product Status: The FESB16JT-M3/I maintains Active product status, ensuring long-term availability and supply chain continuity. The main part FESB16HT-E3/81 is in Last Time Buy status, making substitution necessary for ongoing production.

4. Compliance and Certification: The FESB16JT-M3/I carries AEC-Q101 automotive qualification, indicating enhanced reliability screening and quality assurance protocols. This qualification is applicable to general industrial and commercial applications.

5. Thermal Performance: Operating temperature range remains identical at -65°C to 150°C junction temperature, maintaining thermal design compatibility.

Frequently Asked Questions (FAQ)

Q: Can the FESB16JT-M3/I be used as a direct replacement for the FESB16HT-E3/81 without PCB modifications?

A: Yes. Both parts use identical TO-263AB (D2PAK) surface mount packaging. The footprint, lead spacing, and tab configuration are identical, allowing direct substitution without PCB layout changes.

Q: What is the significance of the higher 600 V rating on the FESB16JT-M3/I compared to the 500 V rating on the FESB16HT-E3/81?

A: The higher reverse voltage rating provides additional design margin and overvoltage protection capability. In applications designed for 500 V operation, the 600 V rated device operates with increased voltage headroom, enhancing reliability under transient overvoltage conditions. This does not negatively impact performance in 500 V applications.

Q: Are the forward voltage drop characteristics identical between these two parts?

A: Yes. Both parts specify 1.5 V maximum forward voltage drop at 16 A, ensuring identical power dissipation and thermal behavior in rectification circuits.

Q: What is the difference between the FESB16HT-E3/81 and FESB16JT-M3/I in terms of recovery characteristics?

A: Both parts have identical fast recovery specifications with 50 ns reverse recovery time and fast recovery classification for switching frequencies greater than 200 mA. No performance difference exists in switching applications.

Q: Why is the FESB16JT-M3/I qualified to AEC-Q101 automotive standards?

A: AEC-Q101 qualification indicates the part has undergone enhanced reliability testing and quality assurance protocols established for automotive applications. This qualification is applicable to general industrial and commercial use and does not restrict the part to automotive applications only.

Q: Is the leakage current specification identical between both parts?

A: Yes. Both parts specify 10 µA maximum reverse leakage current at their respective rated voltages (500 V for the main part, 600 V for the substitute). Leakage current performance is equivalent.

Q: What is the current availability status of each part?

A: The FESB16HT-E3/81 is in Last Time Buy status with 1369 pieces in stock. The FESB16JT-M3/I is in Active status with 705 pieces in stock, ensuring continued availability for future procurement.

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

A: No. Both parts operate across the identical temperature range of -65°C to 150°C junction temperature. Thermal characteristics and heat dissipation behavior are equivalent.