FES16HT-E3/45 Equivalent & Substitute Parts

Part Overview

The FES16HT-E3/45 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This through-hole component operates at 500 V DC reverse voltage with a 16 A average rectified current rating and is housed in a TO-220AC package. The device is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when the original component becomes unavailable, when inventory constraints exist, or when design flexibility permits selection from qualified alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

FES16HT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 997FES16HT-E3/45 Datasheet

Current PartRFQ

BYT79-500,127

WeEn SemiconductorsIn Stock: 17483BYT79-500,127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FES16HT-E3/45 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 500 V
• Package / Case: TO-220-2 (TO-220AC supplier device package)
• Mounting Type: Through Hole
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

• Current - Average Rectified (Io): Equal or greater than 16 A
• Voltage - Forward (Vf) (Max) @ If: Within acceptable operating range
• Reverse Recovery Time (trr): Within fast recovery specification
• Current - Reverse Leakage @ Vr: Within acceptable leakage limits
• Operating Temperature - Junction: Must support -65°C to 150°C range or higher

The BYT79-500,127 qualifies as a substitute based on matching voltage rating, package type, mounting configuration, speed classification, and compliance certifications. Current rating variation and reverse recovery time differences remain within acceptable engineering tolerances for general-purpose rectification applications.

Parameter Comparison

Engineering Selection Recommendations

FES16HT-E3/45 (Vishay General Semiconductor - Diodes Division):

• Primary selection for applications requiring 16 A average rectified current
• Active product status with established supply chain
• ROHS3 compliant and REACH unaffected
• Supports full temperature range -65°C to 150°C
• Lower reverse leakage current (10 µA @ 500 V) suitable for precision applications

BYT79-500,127 (WeEn Semiconductors):

• Qualified substitute for applications with maximum current requirement of 14 A or less
• Active product status with higher inventory availability (17,398 pcs)
• ROHS3 compliant; REACH affected status requires compliance verification in regulated markets
• Supports maximum junction temperature of 150°C
• Higher reverse leakage current (50 µA @ 500 V) acceptable for general-purpose rectification
• Slightly longer reverse recovery time (60 ns vs. 50 ns) remains within fast recovery specification

Selection between these parts depends on circuit current requirements, temperature operating range, and regulatory compliance obligations. Both devices share identical voltage rating, package configuration, and fast recovery speed classification.

Frequently Asked Questions (FAQ)

Q: Can the BYT79-500,127 directly replace the FES16HT-E3/45 in all applications?

A: Direct replacement is possible only when circuit average rectified current does not exceed 14 A. The BYT79-500,127 is rated for 14 A maximum, compared to the FES16HT-E3/45 at 16 A. Both devices share identical 500 V voltage rating, TO-220AC package, and fast recovery speed classification. Verify your circuit's actual current draw before substitution.

Q: What is the significance of the different reverse leakage current values?

A: The FES16HT-E3/45 exhibits 10 µA reverse leakage at 500 V, while the BYT79-500,127 exhibits 50 µA at the same voltage. For general-purpose rectification applications, this difference is typically acceptable. Applications requiring minimal leakage current (such as precision analog circuits or high-impedance stages) should retain the FES16HT-E3/45.

Q: Are both devices suitable for the same temperature range?

A: The FES16HT-E3/45 supports -65°C to 150°C junction temperature. The BYT79-500,127 specifies a maximum of 150°C without explicit minimum temperature rating in the provided data. Confirm the BYT79-500,127 minimum temperature specification if your application requires operation below 0°C.

Q: What does REACH Affected status mean for the BYT79-500,127?

A: REACH Affected indicates the component may contain substances regulated under the REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) directive. The FES16HT-E3/45 is REACH Unaffected. Verify REACH compliance requirements for your end application and geographic market before selecting the BYT79-500,127.

Q: Do both devices have the same package footprint?

A: Yes. Both the FES16HT-E3/45 and BYT79-500,127 use the TO-220-2 package with TO-220AC supplier device package designation. Through-hole mounting is identical, allowing direct PCB footprint compatibility.

Q: What is the difference in reverse recovery time between these devices?

A: The FES16HT-E3/45 has a reverse recovery time (trr) of 50 ns, while the BYT79-500,127 has 60 ns. Both remain within the fast recovery classification (≤ 500 ns, > 200 mA). For most general-purpose rectification circuits, this 10 ns difference is not significant. High-frequency switching applications should evaluate this parameter against specific circuit requirements.

Q: Can I use the BYT79-500,127 if my circuit requires the full 16 A rating?

A: No. The BYT79-500,127 is rated for 14 A average rectified current maximum. Using it in a circuit designed for 16 A operation will cause the device to exceed its rated current, resulting in excessive heat generation and potential failure. Retain the FES16HT-E3/45 or select an alternative substitute with 16 A or higher rating.