FESB8DTHE3_A/I Equivalent & Substitute Parts

Part Overview

The FESB8DTHE3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 V DC reverse voltage and 8 A average rectified current in a surface mount TO-263AB (D2PAK) package. This part is classified as Last Time Buy, indicating discontinued production status. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for ongoing production and repair applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the FESB8DTHE3_A/I are selected based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 8 A per diode
Reverse Recovery Time (trr): 35 ns or faster
Current - Reverse Leakage @ Vr: 10 µA @ 200 V or lower
Voltage - Forward (Vf) (Max) @ If: 950 mV @ 8 A or lower

Mechanical Parameters:

Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type: Surface Mount

Compliance Parameters:

Grade: Automotive
Qualification: AEC-Q101
RoHS Status: ROHS3 Compliant

Substitute parts are categorized as either Manufacturer Recommended (active product status) or Parametric Equivalent (matching electrical specifications). All listed substitutes maintain compatibility with the original design requirements.

Parameter Comparison

Parameter	FESB8DTHE3_A/I (Main)	FESB8DTHM3/I	STTH1002CGY-TR	SFAS804G	SFAS804GH
Manufacturer	Vishay	Vishay	STMicroelectronics	Taiwan Semiconductor	Taiwan Semiconductor
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	8 A	8 A	8 A (per Diode)	8 A	8 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 8 A	950 mV @ 8 A	1.1 V @ 5 A	950 mV @ 8 A	950 mV @ 8 A
Reverse Recovery Time (trr)	35 ns	35 ns	25 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	10 µA @ 200 V	10 µA @ 200 V	5 µA @ 200 V	10 µA @ 200 V	10 µA @ 200 V
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-40°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 150°C
Grade	Automotive	Automotive	Automotive	Not specified	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101	Not specified	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

FESB8DTHM3/I (Manufacturer Recommended Substitute)

The FESB8DTHM3/I is the primary recommended substitute, manufactured by Vishay General Semiconductor - Diodes Division. This part maintains identical electrical specifications to the FESB8DTHE3_A/I, including 200 V reverse voltage, 8 A average rectified current, 950 mV forward voltage at 8 A, and 35 ns reverse recovery time. The part carries Active product status, ensuring long-term availability. Full automotive qualification (AEC-Q101) and ROHS3 compliance are maintained. This substitute is suitable for direct replacement in all applications.

STTH1002CGY-TR (Manufacturer Recommended Substitute)

The STTH1002CGY-TR is manufactured by STMicroelectronics and is classified as a diode array with 1 Pair Common Cathode configuration. This part meets the 200 V reverse voltage and 8 A per diode current requirements. The reverse recovery time of 25 ns is superior to the original specification. Reverse leakage current is 5 µA at 200 V, lower than the original 10 µA specification. Operating temperature range extends to 175°C maximum junction temperature. The part carries Active product status and full automotive qualification (AEC-Q101). Circuit topology must accommodate the common cathode diode pair configuration.

SFAS804G (Parametric Equivalent Substitute)

The SFAS804G is manufactured by Taiwan Semiconductor Corporation and provides parametric equivalence to the FESB8DTHE3_A/I. Electrical specifications match exactly: 200 V reverse voltage, 8 A average rectified current, 950 mV forward voltage at 8 A, and 35 ns reverse recovery time. The part carries Active product status and ROHS3 compliance. Automotive grade and AEC-Q101 qualification are not specified for this part. This substitute is suitable for non-automotive applications or where automotive qualification is not required.

SFAS804GH (Parametric Equivalent Substitute)

The SFAS804GH is manufactured by Taiwan Semiconductor Corporation and provides parametric equivalence with automotive qualification. Electrical specifications match the original part exactly: 200 V reverse voltage, 8 A average rectified current, 950 mV forward voltage at 8 A, and 35 ns reverse recovery time. The part carries Active product status, Automotive grade, AEC-Q101 qualification, and ROHS3 compliance. This substitute is suitable for automotive applications requiring equivalent performance to the original part.

Frequently Asked Questions (FAQ)

Q: Can STTH1002CGY-TR be used as a direct pin-for-pin replacement?

A: The STTH1002CGY-TR is a diode array with common cathode configuration, not a single diode. While the package is identical (TO-263AB D2PAK), the internal configuration differs. Circuit topology must be evaluated to determine compatibility. Pin assignment and circuit function must be verified before substitution.

Q: What is the difference between SFAS804G and SFAS804GH?

A: Both parts are manufactured by Taiwan Semiconductor Corporation and provide identical electrical specifications. The primary difference is that SFAS804GH includes Automotive grade classification and AEC-Q101 qualification, while SFAS804G does not specify these qualifications. For automotive applications, SFAS804GH is the appropriate selection.

Q: Is the FESB8DTHM3/I a direct replacement for FESB8DTHE3_A/I?

A: Yes. The FESB8DTHM3/I is manufactured by the same supplier (Vishay) and maintains identical electrical and mechanical specifications. Both parts are rated for 200 V reverse voltage, 8 A average rectified current, and feature the same TO-263AB package. The primary difference is product status: FESB8DTHE3_A/I is Last Time Buy, while FESB8DTHM3/I is Active. Direct substitution is supported.

Q: Why does STTH1002CGY-TR have a lower reverse recovery time?

A: The STTH1002CGY-TR specifies 25 ns reverse recovery time compared to 35 ns for the original part. This represents improved switching performance and is a beneficial characteristic for high-frequency applications. Lower reverse recovery time reduces switching losses and electromagnetic interference.

Q: Are all substitute parts ROHS3 compliant?

A: FESB8DTHM3/I, STTH1002CGY-TR, SFAS804G, and SFAS804GH are all ROHS3 compliant. Compliance status is explicitly specified for all listed substitutes.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is the Automotive Electronics Council qualification standard for discrete semiconductors. This qualification certifies that the component meets automotive industry reliability and quality requirements. For automotive applications, AEC-Q101 qualified parts are required. FESB8DTHM3/I, STTH1002CGY-TR, and SFAS804GH carry this qualification.

Q: Can SFAS804G be used in automotive applications?

A: SFAS804G does not specify Automotive grade or AEC-Q101 qualification. For automotive applications, SFAS804GH is the appropriate selection, as it includes both Automotive grade and AEC-Q101 qualification. SFAS804G is suitable for industrial and consumer applications where automotive qualification is not required.

Q: What is the operating temperature range difference between substitutes?

A: FESB8DTHE3_A/I, FESB8DTHM3/I, SFAS804G, and SFAS804GH operate from -55°C to 150°C junction temperature. STTH1002CGY-TR extends the upper limit to 175°C maximum junction temperature. This extended range may be beneficial for high-temperature applications.

Q: Are there inventory considerations for substitute selection?

A: Current inventory levels are: FESB8DTHE3_A/I (1008 pcs), FESB8DTHM3/I (888 pcs), STTH1002CGY-TR (3400 pcs), SFAS804G (2254 pcs), and SFAS804GH (2494 pcs). STTH1002CGY-TR maintains the highest inventory level. For long-term supply assurance, parts with Active product status (all substitutes except the main part) are preferred over Last Time Buy status.

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