FES16HT Equivalent & Substitute Parts

Part Overview

The FES16HT is a general-purpose rectifier diode manufactured by onsemi, rated for 500 V DC reverse voltage and 16 A average rectified current in a TO-220-2 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating available packaging and manufacturing variants.

Substiute Parts

FES16HT

onsemiIn Stock: 2352FES16HT Datasheet

Current PartRFQ

FES16HT-E3/45

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

DirectRFQ

DSEP15-06B

IXYSIn Stock: 4376DSEP15-06B Datasheet

SimilarRFQ

STTH15L06D

STMicroelectronicsIn Stock: 17333STTH15L06D Datasheet

SimilarRFQ

STTH15R06D

STMicroelectronicsIn Stock: 16369STTH15R06D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FES16HT are classified into two categories based on electrical parameter alignment:

Direct Equivalent (Voltage and Current Match): The FES16HT-E3/45 maintains identical voltage (500 V) and current (16 A) ratings. This part is manufactured by Vishay General Semiconductor - Diodes Division and carries active product status with RoHS3 compliance. The primary distinction is packaging format (TO-220AC versus TO-220-2) and forward voltage specification at higher current (16 A versus 8 A).

Similar Substitutes (Elevated Voltage Rating, Reduced Current Rating): Parts DSEP15-06B, STTH15L06D, and STTH15R06D are classified as similar substitutes due to higher reverse voltage ratings (600 V) and reduced average rectified current (15 A). These parts are suitable for applications where the 500 V / 16 A specification represents design margin, and the application can operate within 600 V / 15 A parameters. All three maintain fast recovery characteristics and through-hole TO-220-2 mounting compatibility.

Key Parameters Determining Substitution:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 500 V
• Current - Average Rectified (Io): Must equal or exceed 16 A for direct equivalents; 15 A acceptable for similar substitutes
• Speed Classification: Fast Recovery ≤ 500ns required
• Mounting Type: Through Hole required
• Package / Case: TO-220-2 compatible required

Parameter Comparison

Engineering Selection Recommendations

FES16HT-E3/45 (Direct Equivalent): This part is the primary substitute for the obsolete FES16HT. It maintains identical voltage and current ratings (500 V / 16 A) and is manufactured by Vishay General Semiconductor - Diodes Division with active product status. RoHS3 compliance and REACH unaffected status align with current regulatory requirements. Forward voltage characteristics at 16 A operation provide superior performance compared to the main part specification at 8 A. This part is suitable for direct replacement in existing designs without circuit modification.

STTH15L06D (Similar Substitute - Preferred Among Similar Options): Among the 600 V / 15 A alternatives, STTH15L06D offers the lowest forward voltage (1.55 V @ 15 A) and lowest reverse leakage current (15 µA @ 600 V), resulting in reduced power dissipation and improved efficiency. STMicroelectronics active product status and RoHS3 compliance ensure long-term availability and regulatory alignment. This part is suitable for applications where the 500 V / 16 A specification provides design margin and the 1 A current reduction is acceptable.

DSEP15-06B (Similar Substitute - Fastest Recovery): IXYS DSEP15-06B provides the fastest reverse recovery time (30 ns) among all substitutes, beneficial for high-frequency switching applications. HiPerFRED™ series designation indicates optimized performance characteristics. This part is suitable for applications prioritizing switching speed over forward voltage performance.

STTH15R06D (Similar Substitute - Balanced Recovery): STMicroelectronics STTH15R06D offers reverse recovery time (50 ns) matching the main part specification, providing direct compatibility with timing-sensitive circuits. This part is suitable for applications requiring recovery time equivalence with elevated voltage rating.

All substitute parts maintain through-hole TO-220-2 mounting compatibility, fast recovery speed classification, and operating temperature ranges equal to or exceeding the main part specification.

Frequently Asked Questions (FAQ)

Q: Can FES16HT-E3/45 be used as a direct replacement for FES16HT?

A: Yes. FES16HT-E3/45 maintains identical voltage (500 V) and current (16 A) ratings with active product status and RoHS3 compliance. The TO-220-2 package is mechanically and electrically compatible. No circuit modification is required.

Q: What is the difference between FES16HT-E3/45 and the similar substitutes (DSEP15-06B, STTH15L06D, STTH15R06D)?

A: FES16HT-E3/45 matches the 500 V / 16 A specification exactly. The similar substitutes operate at 600 V / 15 A, providing higher voltage rating but 1 A lower current capacity. Selection depends on whether the application requires the full 16 A current or can operate within 15 A limits.

Q: Are the 600 V / 15 A parts suitable for 500 V / 16 A applications?

A: The 600 V rating exceeds the 500 V requirement. However, the 15 A current rating is 1 A below the 16 A specification. These parts are suitable only if the application circuit operates at or below 15 A average rectified current. Circuit analysis is required to confirm current compatibility.

Q: What are the key differences in forward voltage among the substitute parts?

A: FES16HT-E3/45 and STTH15L06D both specify 1.5 V and 1.55 V forward voltage respectively, offering low power dissipation. DSEP15-06B specifies 2.52 V and STTH15R06D specifies 2.9 V, resulting in higher power dissipation. Forward voltage selection impacts thermal management requirements.

Q: Do all substitute parts have the same reverse recovery time?

A: No. FES16HT, FES16HT-E3/45, and STTH15R06D specify 50 ns. DSEP15-06B specifies 30 ns (faster). STTH15L06D specifies 85 ns (slower). Recovery time affects switching frequency performance and electromagnetic interference characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: FES16HT-E3/45, DSEP15-06B, STTH15L06D, and STTH15R06D are all RoHS3 compliant. The main part FES16HT does not specify RoHS status. All active substitutes meet current regulatory requirements.

Q: What is the maximum operating temperature for each part?

A: FES16HT and FES16HT-E3/45 specify 150°C maximum junction temperature. DSEP15-06B, STTH15L06D, and STTH15R06D specify 175°C maximum junction temperature. Higher temperature rating provides additional thermal margin in high-ambient applications.

Q: Can these parts be used interchangeably in the same circuit board layout?

A: All parts use TO-220-2 through-hole packaging with identical pin configuration and mechanical dimensions. PCB layout and thermal management design remain unchanged. Electrical parameter differences (voltage, current, forward voltage) require circuit analysis to confirm compatibility.