FESB8BTHE3_A/I Equivalent & Substitute Parts

Part Overview

The FESB8BTHE3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 100 V DC reverse voltage and 8 A average rectified current in a surface-mount TO-263AB (D2PAK) package. This component is classified as Last Time Buy, indicating discontinued production. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 8 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	10 µA @ 100 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	-
Operating Temperature - Junction	-55°C ~ 150°C	°C
Grade	Automotive	-
Qualification	AEC-Q101	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the FESB8BTHE3_A/I are classified into two categories based on electrical and mechanical compatibility:

Category 1: Manufacturer Recommended Upgrade (Higher Voltage Rating) The FESB8DTHM3/I is a direct upgrade from Vishay General Semiconductor - Diodes Division with identical current rating (8 A), identical forward voltage characteristics (950 mV @ 8 A), identical package (TO-263AB), and identical thermal operating range (-55°C ~ 150°C). The primary difference is an elevated voltage rating of 200 V, providing enhanced design margin. This part maintains automotive grade and AEC-Q101 qualification.

Category 2: Parametric Equivalents (Identical Electrical Specifications) The SFAS802G MNG and SFAS802GHMNG, both from Taiwan Semiconductor Corporation, provide parametric equivalence with the FESB8BTHE3_A/I. Both parts match the 100 V voltage rating, 8 A current rating, 950 mV forward voltage, 35 ns reverse recovery time, and TO-263AB package. The SFAS802GHMNG includes automotive grade and AEC-Q101 qualification, while SFAS802G MNG does not specify these certifications.

Category 3: Functional Alternative (Lower Current Rating, Different Package) The STPS5H100BY-TR from STMicroelectronics is a Schottky diode with identical 100 V voltage rating but reduced current rating (5 A versus 8 A). This part uses a different package (DPAK/TO-252-3 versus D2PAK/TO-263AB) and exhibits lower forward voltage (730 mV @ 5 A). This substitution is applicable only when circuit current requirements do not exceed 5 A and package footprint changes are acceptable.

Parameter Comparison

Parameter	FESB8BTHE3_A/I	FESB8DTHM3/I	SFAS802G MNG	SFAS802GHMNG	STPS5H100BY-TR
Manufacturer	Vishay	Vishay	Taiwan Semiconductor	Taiwan Semiconductor	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	100 V	200 V	100 V	100 V	100 V
Current - Average Rectified (Io)	8 A	8 A	8 A	8 A	5 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 8 A	950 mV @ 8 A	950 mV @ 8 A	950 mV @ 8 A	730 mV @ 5 A
Reverse Recovery Time (trr)	35 ns	35 ns	35 ns	35 ns	Not specified
Current - Reverse Leakage @ Vr	10 µA @ 100 V	10 µA @ 200 V	10 µA @ 100 V	10 µA @ 100 V	3.5 µA @ 100 V
Technology	Standard	Standard	Standard	Standard	Schottky
Package / Case	TO-263AB (D2PAK)	TO-263AB (D2PAK)	TO-263AB (D2PAK)	TO-263AB (D2PAK)	DPAK (TO-252-3)
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-40°C ~ 175°C
Grade	Automotive	Automotive	Not specified	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	Not specified	AEC-Q101	AEC-Q101
Product Status	Last Time Buy	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement with Enhanced Voltage Margin: The FESB8DTHM3/I is the primary recommended substitute. This part is manufactured by the same supplier (Vishay General Semiconductor - Diodes Division), maintains identical current and forward voltage specifications, uses the same package footprint (TO-263AB), and carries active product status. The elevated voltage rating (200 V) provides additional design margin without affecting circuit performance. Both automotive grade and AEC-Q101 qualification are maintained. This substitution requires no circuit modifications.

For Parametric Equivalence with Automotive Qualification: The SFAS802GHMNG from Taiwan Semiconductor Corporation provides complete parametric equivalence with automotive grade and AEC-Q101 qualification. This part matches all critical electrical parameters and uses the identical TO-263AB package. Active product status ensures long-term availability. This substitution is suitable for applications requiring qualified component documentation.

For Parametric Equivalence Without Automotive Qualification: The SFAS802G MNG from Taiwan Semiconductor Corporation provides parametric equivalence but does not specify automotive grade or AEC-Q101 qualification. This part is suitable only for non-automotive applications or where automotive qualification is not required.

For Current-Limited Applications: The STPS5H100BY-TR from STMicroelectronics is applicable only when circuit design permits operation at 5 A or lower. This Schottky diode offers lower forward voltage (730 mV @ 5 A) and improved reverse leakage characteristics (3.5 µA @ 100 V). However, the different package (DPAK versus D2PAK) requires PCB layout modifications. This substitution is not suitable for applications requiring the full 8 A current rating.

Frequently Asked Questions (FAQ)

Q: Can the FESB8DTHM3/I be used as a direct replacement for the FESB8BTHE3_A/I?

A: Yes. The FESB8DTHM3/I is a direct replacement with identical current rating (8 A), identical forward voltage (950 mV @ 8 A), identical package (TO-263AB), and identical thermal range (-55°C ~ 150°C). The higher voltage rating (200 V versus 100 V) provides additional design margin and does not affect circuit operation. No modifications are required.

Q: What is the difference between SFAS802G MNG and SFAS802GHMNG?

A: Both parts provide identical electrical specifications (100 V, 8 A, 950 mV forward voltage, TO-263AB package). The primary difference is that SFAS802GHMNG includes automotive grade and AEC-Q101 qualification, while SFAS802G MNG does not specify these certifications. Selection depends on whether automotive qualification is required for the application.

Q: Can the STPS5H100BY-TR replace the FESB8BTHE3_A/I in all applications?

A: No. The STPS5H100BY-TR has a reduced current rating (5 A versus 8 A) and uses a different package (DPAK versus D2PAK). This substitution is applicable only when circuit current requirements do not exceed 5 A and PCB layout modifications are acceptable. For applications requiring the full 8 A rating, this part is not suitable.

Q: Are all substitute parts RoHS3 compliant?

A: The FESB8BTHE3_A/I, SFAS802G MNG, SFAS802GHMNG, and STPS5H100BY-TR are all ROHS3 compliant. The FESB8DTHM3/I does not specify RoHS status in the provided data.

Q: What is the significance of the Last Time Buy status for the FESB8BTHE3_A/I?

A: Last Time Buy status indicates that the FESB8BTHE3_A/I is discontinued and no longer in production. All substitute parts listed have active product status, ensuring continued availability for future production requirements.

Q: Do all substitute parts maintain the same operating temperature range?

A: The FESB8BTHE3_A/I, FESB8DTHM3/I, SFAS802G MNG, and SFAS802GHMNG all operate from -55°C to 150°C. The STPS5H100BY-TR has a wider range (-40°C to 175°C), which is compatible with the original specification.

Q: Are all substitute parts automotive qualified?

A: The FESB8DTHM3/I, SFAS802GHMNG, and STPS5H100BY-TR carry automotive grade and AEC-Q101 qualification. The SFAS802G MNG does not specify automotive qualification. Selection should be based on application requirements.

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