FEP16HT Equivalent & Substitute Parts

Part Overview

The FEP16HT is a diode array rectifier manufactured by onsemi, configured as a 1 Pair Common Cathode design with 500 V DC reverse voltage rating and 16 A average rectified current per diode. The device is packaged in TO-220-3 through-hole format and operates across a junction temperature range of -55°C to 150°C. The FEP16HT is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

FEP16HT

onsemiIn Stock: 1535FEP16HT Datasheet

Current PartRFQ

DSEC16-06A

IXYSIn Stock: 1537DSEC16-06A Datasheet

SimilarRFQ

STTH16L06CT

STMicroelectronicsIn Stock: 7399STTH16L06CT Datasheet

SimilarRFQ

FEP16HT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 22887FEP16HT-E3/45 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FEP16HT is determined by the following critical parameters: diode configuration (1 Pair Common Cathode), mounting type (Through Hole), and package format (TO-220-3). These parameters establish mechanical and electrical interface compatibility.

Electrical substitution is evaluated based on voltage rating, current capacity, forward voltage characteristics, and reverse recovery performance. The FEP16HT establishes a baseline of 500 V reverse voltage and 16 A current capacity. Substitute parts may operate at equal or higher voltage ratings and equal or higher current ratings while maintaining compatible forward voltage and recovery time characteristics within the fast recovery classification.

The substitute parts are grouped into two categories:

Parametric Equivalent: FEP16HT-E3/45 matches the FEP16HT across all critical electrical parameters (500 V, 16 A, 1.5 V @ 8 A, 50 ns trr) and maintains identical thermal operating range. This part represents a direct functional replacement.

Functional Substitutes: DSEC16-06A and STTH16L06CT operate at elevated voltage ratings (600 V) with reduced current capacity (10 A per diode). These parts are compatible with applications designed for the FEP16HT when the circuit operates below 10 A and does not require the full 16 A capacity. The higher voltage rating provides additional design margin in high-voltage applications.

Parameter Comparison

Engineering Selection Recommendations

FEP16HT-E3/45 (Parametric Equivalent): This Vishay part is the primary replacement for the obsolete FEP16HT. It maintains identical electrical specifications across voltage rating (500 V), current capacity (16 A), forward voltage (1.5 V @ 8 A), and reverse recovery time (50 ns). The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Direct substitution is supported without circuit modification.

STTH16L06CT (Functional Substitute): This STMicroelectronics part operates at 600 V with 10 A current capacity. It is suitable for applications where circuit current does not exceed 10 A per diode and where elevated voltage rating provides design margin. The part is active in production with ROHS3 compliance. Forward voltage is 1.8 V @ 8 A, and reverse recovery time is 55 ns. Maximum junction temperature is 175°C, providing extended thermal operating range compared to the FEP16HT.

DSEC16-06A (Functional Substitute): This IXYS HiPerFRED™ series part operates at 600 V with 10 A current capacity. It is suitable for applications where circuit current does not exceed 10 A per diode. The part is active in production. Forward voltage is 2.1 V @ 10 A, and reverse recovery time is 35 ns. Maximum junction temperature is 175°C. Higher forward voltage and reverse leakage current (60 µA @ 600 V) compared to the FEP16HT require thermal and power dissipation evaluation in the target application.

Frequently Asked Questions (FAQ)

Q: Can FEP16HT-E3/45 be used as a direct replacement for FEP16HT?

A: Yes. FEP16HT-E3/45 is a parametric equivalent with identical voltage rating (500 V), current capacity (16 A), forward voltage (1.5 V @ 8 A), and reverse recovery time (50 ns). No circuit modifications are required. The part is active in production and ROHS3 compliant.

Q: What are the limitations of STTH16L06CT and DSEC16-06A as substitutes?

A: Both parts are rated for 10 A average rectified current per diode, compared to 16 A for the FEP16HT. These parts are suitable only for applications where the circuit operates at or below 10 A per diode. The higher voltage rating (600 V) is compatible with 500 V designs and provides additional voltage margin. DSEC16-06A exhibits higher forward voltage (2.1 V @ 10 A) and reverse leakage current (60 µA @ 600 V), requiring thermal evaluation.

Q: Are all substitute parts compatible with TO-220-3 PCB layouts?

A: Yes. All substitute parts are packaged in TO-220-3 through-hole format with identical mechanical dimensions and pin configuration. Direct PCB mounting is supported without layout modification.

Q: What compliance certifications apply to the substitute parts?

A: FEP16HT-E3/45 and STTH16L06CT are ROHS3 compliant. All substitute parts maintain REACH Unaffected status and unlimited moisture sensitivity rating (MSL 1). ECCN classification is EAR99 for all parts.

Q: How do reverse recovery times compare across the substitute options?

A: FEP16HT and FEP16HT-E3/45 both specify 50 ns reverse recovery time. DSEC16-06A specifies 35 ns, providing faster switching performance. STTH16L06CT specifies 55 ns. Faster recovery time reduces switching losses in high-frequency applications.

Q: What is the maximum junction temperature range for each part?

A: FEP16HT and FEP16HT-E3/45 operate to 150°C maximum junction temperature. DSEC16-06A and STTH16L06CT both operate to 175°C maximum junction temperature, providing extended thermal operating range for high-temperature applications.