FEP16GT Equivalent & Substitute Parts

Part Overview

The FEP16GT is a diode array rectifier manufactured by onsemi, configured as a 1 Pair Common Cathode design with 400V reverse voltage rating and 16A average rectified current per diode. The device is packaged in TO-220-3 through-hole configuration and operates across a junction temperature range of -55°C to 150°C.

The FEP16GT is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production builds, repairs, and system upgrades where the original part is no longer manufactured or stocked.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io) (per Diode)	16 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-220-3
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the FEP16GT are grouped based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following parameters:

Critical Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io) (per Diode): 16 A or higher
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 8 A or lower
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Through Hole
Package / Case: TO-220-3 or compatible through-hole package

Direct Substitutes maintain identical electrical specifications and through-hole TO-220-3 packaging, enabling direct replacement without circuit modification.

Parametric Equivalents maintain identical electrical specifications but may differ in package form factor (TO-247-3) or include enhanced features such as automotive qualification, requiring mechanical board layout adjustment.

Similar Alternatives maintain the same voltage and configuration but operate at reduced current ratings (10A to 15A), suitable only for applications with lower current requirements than the original 16A specification.

Parameter Comparison

Parameter	FEP16GT (Main)	FEP16GT-E3/45	ER1604CT_T0_00001	MUR1640CTH	SDUR3040CT	HER1605PT C0G	DSEC16-04AS
Manufacturer	onsemi	Vishay General Semiconductor	Panjit International Inc.	Taiwan Semiconductor Corporation	SMC Diode Solutions	Taiwan Semiconductor Corporation	IXYS
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io) (per Diode)	16 A	16 A	16 A	16 A	15 A	16 A	10 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A	1.3 V @ 8 A	1.3 V @ 8 A	1.3 V @ 8 A	1.25 V @ 15 A	1.3 V @ 8 A	1.53 V @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns	50 ns	35 ns	50 ns	45 ns	50 ns	30 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 V	10 µA @ 400 V	1 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V	60 µA @ 400 V
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Surface Mount
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-247-3	TO-263-3, D2PAK
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (Recommended for Drop-In Replacement):

FEP16GT-E3/45, ER1604CT_T0_00001, and MUR1640CTH are direct electrical and mechanical equivalents to the FEP16GT. These parts maintain identical voltage, current, and thermal specifications with TO-220-3 through-hole packaging, enabling direct board-level substitution without design modification.

FEP16GT-E3/45 (Vishay General Semiconductor) is the primary recommended substitute. It maintains all electrical parameters identically to the original FEP16GT and carries ROHS3 compliance certification. This part is actively manufactured and maintains the highest inventory availability (4774 units).

ER1604CT_T0_00001 (Panjit International Inc.) provides equivalent electrical performance with improved reverse recovery time (35 ns versus 50 ns) and superior reverse leakage characteristics (1 µA versus 10 µA). This part is actively manufactured with ROHS3 compliance and adequate inventory (848 units).

MUR1640CTH (Taiwan Semiconductor Corporation) maintains identical electrical specifications and includes automotive-grade qualification (AEC-Q101) with extended junction temperature range (-55°C to 175°C). This part is suitable for applications requiring automotive-level reliability and is actively manufactured with ROHS3 compliance (1691 units).

Parametric Equivalent (Package Variant):

HER1605PT C0G (Taiwan Semiconductor Corporation) provides identical electrical specifications but uses TO-247-3 through-hole packaging instead of TO-220-3. This larger package form factor requires board layout modification but offers improved thermal performance through increased lead surface area. This part is actively manufactured with ROHS3 compliance (776 units).

Similar Alternative (Reduced Current Rating):

SDUR3040CT (SMC Diode Solutions) operates at 15A average rectified current, representing a 6.25% reduction from the original 16A specification. This part maintains 400V reverse voltage and identical thermal characteristics. Selection of this part is limited to applications where the 15A current rating satisfies system requirements. This part is actively manufactured (753 units).

Not Recommended:

DSEC16-04AS (IXYS) operates at 10A average rectified current, representing a 37.5% reduction from the original 16A specification. Additionally, this part uses surface-mount TO-263-3 packaging, requiring complete board redesign. Selection of this part is limited to new designs with reduced current requirements and surface-mount assembly capability.

Frequently Asked Questions (FAQ)

Q: Can FEP16GT-E3/45 be used as a direct replacement for FEP16GT?

A: Yes. FEP16GT-E3/45 maintains identical electrical specifications (400V, 16A, 1.3V forward voltage, 50ns recovery time) and uses the same TO-220-3 through-hole package. No circuit modification is required.

Q: What is the difference between FEP16GT and ER1604CT_T0_00001?

A: Both parts maintain identical voltage (400V) and current (16A) ratings with TO-220-3 packaging. ER1604CT_T0_00001 provides improved reverse recovery time (35 ns versus 50 ns) and lower reverse leakage current (1 µA versus 10 µA), resulting in reduced switching losses and improved efficiency.

Q: Why is MUR1640CTH qualified for automotive applications?

A: MUR1640CTH carries AEC-Q101 automotive qualification and extends the junction temperature range to -55°C to 175°C, compared to the standard -55°C to 150°C range. This qualification indicates compliance with automotive reliability and environmental stress testing standards.

Q: Can SDUR3040CT replace FEP16GT in all applications?

A: SDUR3040CT operates at 15A average rectified current, which is 1A lower than the original 16A specification. This part is suitable only for applications where the system current requirement does not exceed 15A. Applications requiring the full 16A rating must use FEP16GT-E3/45, ER1604CT_T0_00001, or MUR1640CTH.

Q: What is the advantage of HER1605PT C0G over FEP16GT-E3/45?

A: HER1605PT C0G uses TO-247-3 through-hole packaging, which provides larger lead surface area and improved thermal dissipation compared to TO-220-3. This package is suitable for applications with higher thermal stress. However, board layout modification is required due to different pin spacing and lead configuration.

Q: Why is DSEC16-04AS not recommended as a substitute?

A: DSEC16-04AS operates at 10A average rectified current, representing a 37.5% reduction from the original 16A specification. Additionally, this part uses surface-mount TO-263-3 packaging, requiring complete board redesign and assembly process modification. This part is suitable only for new designs with reduced current requirements.

Q: Are all substitute parts RoHS3 compliant?

A: FEP16GT-E3/45, ER1604CT_T0_00001, MUR1640CTH, HER1605PT C0G, and DSEC16-04AS are all ROHS3 compliant. The original FEP16GT does not specify RoHS status. All active substitute parts meet current environmental compliance requirements.

Q: What is the difference in reverse recovery time between substitute parts?

A: Reverse recovery times vary across substitutes: FEP16GT-E3/45 and MUR1640CTH maintain 50 ns (identical to original), ER1604CT_T0_00001 provides 35 ns (improved), SDUR3040CT provides 45 ns (improved), and DSEC16-04AS provides 30 ns (significantly improved). Lower reverse recovery time reduces switching losses and improves efficiency in high-frequency applications.

Q: Can substitute parts be mixed in the same circuit?

A: All recommended direct substitutes (FEP16GT-E3/45, ER1604CT_T0_00001, MUR1640CTH) maintain identical electrical specifications and can be used interchangeably within the same circuit. However, mixing parts with different current ratings (such as combining 16A and 15A parts) requires circuit analysis to ensure current distribution does not exceed individual part ratings.

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