FES16BT Equivalent & Substitute Parts

Part Overview

The FES16BT is a general-purpose rectifier diode manufactured by onsemi, rated for 100 V DC reverse voltage and 16 A average rectified current in a Through Hole TO-220-2 package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	16 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 8 A
Reverse Recovery Time (trr)	35 ns
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 100 V
Mounting Type	Through Hole
Package / Case	TO-220-2
Operating Temperature - Junction	-65°C ~ 150°C
Technology	Standard

Substitute Part Grouping Explanation

Substitution of the FES16BT is determined by the following critical parameters: voltage rating (Vr), current rating (Io), package type (TO-220-2), mounting configuration (Through Hole), and recovery characteristics (Fast Recovery ≤ 500ns).

Direct Equivalent Classification: Parts meeting all key electrical specifications (100 V, 16 A, Fast Recovery ≤ 500ns) and identical package footprint qualify as direct equivalents.

Similar/Compatible Classification: Parts with different voltage or current ratings but compatible package, mounting type, and recovery speed characteristics are classified as similar substitutes. These require circuit-level validation to confirm suitability for the intended application.

Parameter Comparison

Parameter	FES16BT (Main)	FES16BT-E3/45 (Direct)	STTH1210DY (Similar)	STTH1502D (Similar)
Manufacturer	onsemi	Vishay General Semiconductor - Diodes Division	STMicroelectronics	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	1000 V	200 V
Current - Average Rectified (Io)	16 A	16 A	12 A	15 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 8 A	975 mV @ 16 A	2 V @ 12 A	1.1 V @ 15 A
Reverse Recovery Time (trr)	35 ns	35 ns	90 ns	36 ns
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 100 V	10 µA @ 100 V	10 µA @ 1000 V	10 µA @ 200 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-2	TO-220-2	TO-220-2	TO-220-2
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 150°C	-40°C ~ 175°C	Max 175°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

FES16BT-E3/45 (Direct Equivalent): This part is the primary substitute for the FES16BT. It maintains identical voltage (100 V) and current (16 A) ratings, matching reverse recovery time (35 ns), and equivalent forward voltage characteristics. The part is Active in product status and ROHS3 Compliant, providing long-term availability and regulatory compliance. The TO-220-2 package footprint is identical, enabling direct board-level substitution without layout modifications.

STTH1210DY (Similar Substitute): This STMicroelectronics part offers elevated voltage rating (1000 V) and reduced current rating (12 A) compared to the FES16BT. The higher voltage rating provides design margin for overvoltage conditions but results in increased forward voltage drop (2 V @ 12 A). The reverse recovery time is extended to 90 ns. This part includes AEC-Q101 automotive qualification and operates across an extended temperature range (-40°C ~ 175°C). Selection of this part requires confirmation that the 12 A current rating is sufficient for the application and that the elevated forward voltage drop does not compromise circuit performance.

STTH1502D (Similar Substitute): This STMicroelectronics part provides intermediate voltage rating (200 V) and near-equivalent current rating (15 A). The reverse recovery time (36 ns) closely matches the FES16BT. Forward voltage (1.1 V @ 15 A) is moderately elevated. This part is Active in product status and ROHS3 Compliant. Selection of this part is appropriate for applications where the 200 V voltage rating provides adequate design margin and the 15 A current rating meets circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can FES16BT-E3/45 be used as a direct replacement for FES16BT?

A: Yes. The FES16BT-E3/45 maintains identical voltage (100 V), current (16 A), and recovery time (35 ns) specifications. Both parts use the TO-220-2 package with identical footprint. The part is Active in product status, ensuring long-term availability.

Q: What are the limitations of using STTH1210DY as a substitute?

A: The STTH1210DY has a reduced current rating (12 A versus 16 A) and significantly higher forward voltage (2 V @ 12 A versus 950 mV @ 8 A). The reverse recovery time is extended to 90 ns. These differences require circuit-level analysis to confirm compatibility with the intended application's current and thermal requirements.

Q: What are the limitations of using STTH1502D as a substitute?

A: The STTH1502D has a reduced current rating (15 A versus 16 A) and elevated voltage rating (200 V versus 100 V). Forward voltage is moderately higher (1.1 V @ 15 A). The 1 A current reduction and voltage elevation require application-specific validation.

Q: Are all substitute parts compatible with the original TO-220-2 footprint?

A: Yes. All listed substitute parts use the TO-220-2 package with identical Through Hole mounting configuration, enabling direct board-level substitution without layout modifications.

Q: What compliance certifications apply to the substitute parts?

A: FES16BT-E3/45, STTH1210DY, and STTH1502D are all ROHS3 Compliant. STTH1210DY includes AEC-Q101 automotive qualification. All parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: How do operating temperature ranges compare?

A: The FES16BT operates from -65°C to 150°C. FES16BT-E3/45 matches this range. STTH1210DY extends to -40°C to 175°C, and STTH1502D operates to a maximum of 175°C. Extended temperature ranges in substitute parts provide additional design margin for thermal applications.

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