FEP16JT Equivalent & Substitute Parts

Part Overview

The FEP16JT is a diode array rectifier manufactured by onsemi, configured as a 1 Pair Common Cathode design rated for 600V DC reverse voltage and 16A average rectified current per diode. The device is packaged in a TO-220-3 through-hole format and features fast recovery characteristics with a 50 ns reverse recovery time. The FEP16JT is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io) (per Diode)	16 A
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 8 A
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	10 µA @ 600 V
Operating Temperature - Junction	-55°C ~ 150°C
Diode Configuration	1 Pair Common Cathode
Package / Case	TO-220-3
Mounting Type	Through Hole
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)

Substitute Part Grouping Explanation

Substitution of the FEP16JT is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 600 V (exact match required)
Diode Configuration: 1 Pair Common Cathode (exact match required)
Package / Case: TO-220-3 (exact match required)
Mounting Type: Through Hole (exact match required)
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)

Current Rating Considerations: Substitute parts are grouped into two categories based on average rectified current per diode:

Parametric Equivalents (16A Rating): Parts with identical 16A current rating, forward voltage characteristics, and reverse recovery time. These provide direct functional replacement.
Functional Substitutes (Lower Current Ratings): Parts rated at 8A or 10A average rectified current. These are suitable only for applications where the circuit design operates at or below the substitute part's current specification.

All substitute parts maintain the 600V reverse voltage rating, TO-220-3 package, common cathode configuration, and fast recovery speed classification required for compatibility with the FEP16JT footprint and electrical requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr (ns)	Ir @ Vr	Tj (Operating)	Package	Product Status
FEP16JT	onsemi	600 V	16 A	1.5 V @ 8 A	50	10 µA @ 600 V	-55°C ~ 150°C	TO-220-3	Obsolete
FEP16JT-E3/45	Vishay General Semiconductor - Diodes Division	600 V	16 A	1.5 V @ 8 A	50	10 µA @ 600 V	-55°C ~ 150°C	TO-220-3	Active
MUR1660CTH	Taiwan Semiconductor Corporation	600 V	16 A	1.5 V @ 8 A	50	10 µA @ 600 V	-55°C ~ 175°C	TO-220-3	Active
MUR1660CT	Taiwan Semiconductor Corporation	600 V	16 A	1.5 V @ 8 A	50	10 µA @ 600 V	-55°C ~ 175°C	TO-220-3	Active
MUR1660CTG	onsemi	600 V	8 A	1.5 V @ 8 A	60	10 µA @ 600 V	-65°C ~ 175°C	TO-220-3	Active
DSEC16-06A	IXYS	600 V	10 A	2.1 V @ 10 A	35	60 µA @ 600 V	-55°C ~ 175°C	TO-220-3	Active
STTH16L06CT	STMicroelectronics	600 V	10 A	1.8 V @ 8 A	55	8 µA @ 600 V	-40°C ~ 175°C	TO-220-3	Active
STTH16L06CTY	STMicroelectronics	600 V	10 A	1.8 V @ 8 A	55	8 µA @ 600 V	-40°C ~ 175°C	TO-220-3	Active
STTH10LCD06CT	STMicroelectronics	600 V	5 A	2 V @ 5 A	50	1 µA @ 600 V	-55°C ~ 175°C	TO-220-3	Active

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacement):

The following parts provide parametric equivalence to the FEP16JT with identical electrical specifications and are classified as active products:

FEP16JT-E3/45 (Vishay General Semiconductor - Diodes Division): Identical 16A current rating, forward voltage, and reverse recovery time. RoHS3 compliant. Recommended for direct substitution in active designs.
MUR1660CTH (Taiwan Semiconductor Corporation): Identical 16A current rating and electrical characteristics. AEC-Q101 automotive qualified. Extended operating temperature range to 175°C. RoHS3 compliant.
MUR1660CT (Taiwan Semiconductor Corporation): Identical 16A current rating and electrical characteristics. Extended operating temperature range to 175°C. RoHS3 compliant.

Functional Substitutes (Current-Limited Applications):

The following parts are suitable for applications where circuit design operates at or below their specified current ratings:

MUR1660CTG (onsemi): 8A current rating. Active product with SWITCHMODE™ series designation. Extended operating temperature range to 175°C. RoHS3 compliant. Suitable for designs requiring maximum 8A per diode.
DSEC16-06A (IXYS): 10A current rating. HiPerFRED™ series with superior reverse recovery time of 35 ns. Extended operating temperature range to 175°C. RoHS3 compliant. Suitable for designs requiring maximum 10A per diode.
STTH16L06CT (STMicroelectronics): 10A current rating. Extended operating temperature range to 175°C. RoHS3 compliant. Suitable for designs requiring maximum 10A per diode.
STTH16L06CTY (STMicroelectronics): 10A current rating. AEC-Q101 automotive qualified. Extended operating temperature range to 175°C. RoHS3 compliant. Suitable for automotive applications requiring maximum 10A per diode.
STTH10LCD06CT (STMicroelectronics): 5A current rating. Extended operating temperature range to 175°C. RoHS3 compliant. Suitable for designs requiring maximum 5A per diode.

All substitute parts maintain TO-220-3 through-hole packaging, 600V reverse voltage rating, 1 Pair Common Cathode configuration, and fast recovery speed classification.

Frequently Asked Questions (FAQ)

Q: Can MUR1660CTG be used as a direct replacement for FEP16JT?

A: MUR1660CTG is functionally compatible in package and voltage rating but is rated for 8A average rectified current per diode compared to the FEP16JT's 16A rating. It is suitable only for applications where the circuit design operates at or below 8A per diode.

Q: What is the difference between MUR1660CTH and MUR1660CT?

A: Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications (16A, 600V, 50 ns reverse recovery time). MUR1660CTH includes AEC-Q101 automotive qualification. Selection depends on application requirements for automotive compliance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed are RoHS3 compliant. The original FEP16JT is classified as obsolete and does not carry RoHS3 compliance status.

Q: Can STTH10LCD06CT replace FEP16JT in a 16A application?

A: No. STTH10LCD06CT is rated for 5A average rectified current per diode. It is suitable only for applications designed to operate at or below 5A per diode. Using it in a 16A application would exceed its current rating.

Q: What is the significance of the reverse recovery time (trr) difference between substitute parts?

A: Reverse recovery time affects switching speed and switching losses. The FEP16JT specifies 50 ns. Substitute parts range from 35 ns (DSEC16-06A) to 60 ns (MUR1660CTG). Lower trr values reduce switching losses; higher values remain within the fast recovery classification (≤ 500ns). Selection depends on specific circuit switching frequency requirements.

Q: Are STTH16L06CT and STTH16L06CTY interchangeable?

A: Both parts have identical electrical specifications and 10A current ratings. STTH16L06CTY includes AEC-Q101 automotive qualification and is suitable for automotive applications. STTH16L06CT is suitable for general industrial applications. Selection depends on application requirements.

Q: What is the operating temperature range consideration for substitute selection?

A: The FEP16JT operates from -55°C to 150°C. Most active substitutes extend the upper limit to 175°C. STTH16L06CTY and STTH16L06CT specify -40°C minimum. Selection depends on application temperature requirements. Extended upper temperature range provides design margin for thermal management.

Q: Can multiple lower-rated parts be paralleled to replace FEP16JT?

A: Paralleling is not addressed in the provided electrical and mechanical parameters. Substitution selection must be based strictly on individual part ratings and specifications.

Q: Is the TO-220-3 package identical across all substitute parts?

A: All substitute parts use TO-220-3 through-hole packaging with identical mechanical footprint and pin configuration. Mounting compatibility is maintained across all listed alternatives.

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