FES16JT Equivalent & Substitute Parts

Part Overview

The FES16JT is a general-purpose rectifier diode manufactured by onsemi, rated for 600 V DC reverse voltage and 16 A average rectified current in a through-hole TO-220-2 package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The FES16JT operates across a junction temperature range of -65°C to 150°C and features fast recovery characteristics with a reverse recovery time of 50 ns.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	16	A
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 8 A	V @ A
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	10	µA @ 600 V
Mounting Type	Through Hole	-
Package / Case	TO-220-2	-
Operating Temperature - Junction	-65 to 150	°C
Technology	Standard	-
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	-

Substitute Part Grouping Explanation

Substitution of the FES16JT is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V
Mounting Type: Through Hole
Package / Case: TO-220-2
Technology: Standard
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Current Rating Considerations: Substitute parts are grouped based on average rectified current (Io) capacity. The FES16JT is rated for 16 A. Direct equivalents maintain this 16 A rating. Upgrade options provide equal or higher current capacity. Similar options provide lower current capacity and are suitable only where application requirements permit reduced current handling.

Thermal Operating Range: The FES16JT operates from -65°C to 150°C junction temperature. Substitute parts with extended temperature ranges (up to 175°C maximum) provide additional thermal margin but remain functionally compatible.

Recovery Characteristics: All substitute parts maintain fast recovery characteristics with reverse recovery times between 20 ns and 85 ns, ensuring compatibility with fast-switching applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Tj (Operating)	Product Status	Package
FES16JT	onsemi	600 V	16 A	1.5 V @ 8 A	50 ns	10 µA @ 600 V	-65 to 150°C	Obsolete	TO-220-2
FES16JT-E3/45	Vishay General Semiconductor - Diodes Division	600 V	16 A	1.5 V @ 16 A	50 ns	10 µA @ 600 V	-65 to 150°C	Active	TO-220-2
SDUR1560	SMC Diode Solutions	600 V	Not specified	1.7 V @ 15 A	50 ns	10 µA @ 600 V	-55 to 175°C	Active	TO-220-2
BYC8D-600,127	WeEn Semiconductors	600 V	8 A	2.9 V @ 8 A	20 ns	40 µA @ 600 V	-55 to 150°C	Active	TO-220-2
BYT79-600,127	WeEn Semiconductors	600 V	15 A	1.38 V @ 15 A	60 ns	50 µA @ 600 V	-55 to 150°C	Active	TO-220-2
DSEP15-06B	IXYS	600 V	15 A	2.52 V @ 15 A	30 ns	100 µA @ 600 V	-55 to 175°C	Active	TO-220-2
STTH12R06DIRG	STMicroelectronics	600 V	12 A	2.9 V @ 12 A	45 ns	45 µA @ 600 V	-55 to 175°C	Active	TO-220-2
STTH15L06D	STMicroelectronics	600 V	15 A	1.55 V @ 15 A	85 ns	15 µA @ 600 V	-55 to 175°C	Active	TO-220-2
STTH506DTI	STMicroelectronics	600 V	5 A	3.6 V @ 5 A	25 ns	6 µA @ 600 V	-55 to 175°C	Active	TO-220-2

Engineering Selection Recommendations

Direct Equivalent (Active Status): FES16JT-E3/45 from Vishay General Semiconductor - Diodes Division is the primary direct equivalent. This part maintains identical voltage and current ratings, matching forward voltage characteristics, and equivalent reverse recovery time. The part is in active production status with ROHS3 compliance, providing long-term availability and regulatory alignment.

Upgrade Option (Higher Current Capacity): SDUR1560 from SMC Diode Solutions provides equivalent voltage and recovery characteristics with extended operating temperature range (-55°C to 175°C). While average rectified current is not specified in available data, forward voltage at 15 A indicates suitability for applications requiring 15 A or higher current handling. This part is in active status with REACH compliance affected.

Similar Options (Reduced Current Capacity): Parts with lower current ratings (BYC8D-600,127 at 8 A, STTH12R06DIRG at 12 A, STTH506DTI at 5 A) are suitable only for applications where the 16 A rating of the FES16JT is not required. These parts maintain 600 V voltage rating and through-hole TO-220-2 packaging.

Similar Options (Comparable Current Capacity): BYT79-600,127, DSEP15-06B, and STTH15L06D all provide 15 A current ratings with 600 V voltage rating. These parts are in active production status with ROHS3 compliance. Forward voltage and reverse recovery time characteristics vary; selection depends on specific circuit requirements for switching speed and power dissipation.

Compliance Considerations: All substitute parts listed are ROHS3 compliant and carry REACH status designations. Parts from STMicroelectronics (STTH series) and Vishay (FES16JT-E3/45) are REACH Unaffected, providing regulatory certainty. Parts from WeEn Semiconductors (BYT79-600,127) and SMC Diode Solutions (SDUR1560) are REACH Affected, requiring compliance verification for specific applications.

Frequently Asked Questions (FAQ)

Q: Can FES16JT-E3/45 be used as a direct replacement for FES16JT?

A: Yes. FES16JT-E3/45 maintains identical voltage (600 V), current (16 A), and recovery time (50 ns) specifications. Both operate across -65°C to 150°C junction temperature. The primary difference is product status: FES16JT is obsolete while FES16JT-E3/45 is in active production. Packaging is TO-220-2 for both parts.

Q: What is the difference between TO-220-2 and TO-220AC packaging?

A: TO-220-2 and TO-220AC refer to the same physical package format used for these diodes. Both designations describe a through-hole package with two leads suitable for mounting on printed circuit boards. The terms are used interchangeably by different manufacturers.

Q: Can I use STTH15L06D instead of FES16JT in a 16 A application?

A: STTH15L06D is rated for 15 A average rectified current, which is 1 A below the FES16JT 16 A rating. Use of this part in a 16 A application exceeds its current specification and is not recommended. STTH15L06D is suitable for applications requiring 15 A or less.

Q: Why do some substitute parts have higher forward voltage drops?

A: Forward voltage (Vf) varies among semiconductor manufacturers due to differences in die design, doping profiles, and manufacturing processes. Higher forward voltage results in increased power dissipation. Selection should account for thermal management requirements and circuit efficiency specifications.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed carry ROHS3 compliance designation. This ensures compatibility with RoHS-regulated applications and markets.

Q: What does "REACH Affected" mean for SDUR1560 and BYT79-600,127?

A: REACH Affected status indicates that these parts contain substances of concern regulated under the REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) directive. Applications subject to REACH regulations require verification of compliance. Parts designated REACH Unaffected do not contain regulated substances and present no REACH compliance burden.

Q: Can I use a lower-current part like STTH506DTI (5 A) in place of FES16JT (16 A)?

A: No. STTH506DTI is rated for 5 A average rectified current, significantly below the FES16JT 16 A rating. Using an undersized component results in thermal stress, reduced reliability, and potential failure. Current rating must meet or exceed application requirements.

Q: Which substitute part has the fastest recovery time?

A: BYC8D-600,127 has the fastest reverse recovery time at 20 ns. STTH506DTI follows at 25 ns. Faster recovery times reduce switching losses in high-frequency applications but may increase electromagnetic interference. Selection depends on specific circuit switching frequency requirements.

Q: Do all substitute parts operate at the same temperature range as FES16JT?

A: No. FES16JT operates from -65°C to 150°C. Several substitute parts extend the upper temperature limit to 175°C (SDUR1560, DSEP15-06B, STTH12R06DIRG, STTH15L06D, STTH506DTI). Extended temperature range provides additional thermal margin in high-temperature environments but does not affect electrical compatibility at FES16JT operating temperatures.

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