FESB8FTHE3_A/P Equivalent & Substitute Parts

Part Overview

The FESB8FTHE3_A/P is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 300 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 status. Equivalent and substitute parts are necessary to maintain design continuity and ensure continued availability for new production builds and field replacements.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	300 V
Current - Average Rectified (Io)	8 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	10 µA @ 300 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

Substitution of the FESB8FTHE3_A/P is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) rating must equal or exceed 300 V
Current - Average Rectified (Io) must equal or exceed 8 A
Voltage - Forward (Vf) characteristics must be compatible at rated current
Reverse Recovery Time (trr) must support fast recovery operation
Current - Reverse Leakage must remain within acceptable limits

Mechanical & Environmental Compatibility:

Surface Mount package configuration
Automotive Grade qualification with AEC-Q101 certification
Operating temperature range must encompass -55°C to 150°C junction temperature
RoHS3 compliance required

Substitute Categories:

Category 1: Direct Voltage Upgrade (Higher Vr Rating) FESB8GTHM3/I provides 400 V DC reverse voltage rating while maintaining 8 A current capacity, identical forward voltage characteristics, and identical package form factor. This substitute is suitable for applications where higher voltage margin is acceptable.

Category 2: Current & Package Upgrade (Different Package) STTH1003SBY-TR provides 10 A current capacity at 300 V reverse voltage with improved reverse recovery time (35 ns vs. 50 ns), but uses DPAK package instead of D2PAK. This substitute requires PCB layout modification and is suitable for applications where higher current capacity and faster switching are beneficial.

Parameter Comparison

Parameter	FESB8FTHE3_A/P (Main)	FESB8GTHM3/I (Substitute)	STTH1003SBY-TR (Substitute)
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	300 V	400 V	300 V
Current - Average Rectified (Io)	8 A	8 A	10 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A	1.3 V @ 8 A	1.3 V @ 10 A
Reverse Recovery Time (trr)	50 ns	50 ns	35 ns
Current - Reverse Leakage @ Vr	10 µA @ 300 V	10 µA @ 400 V	10 µA @ 300 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-252-3, DPAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-40°C ~ 175°C
Grade	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Last Time Buy	Active	Active

Engineering Selection Recommendations

FESB8GTHM3/I Selection Criteria:

The FESB8GTHM3/I is the preferred substitute when design continuity and minimal PCB modification are required. This part maintains identical package geometry (TO-263AB D2PAK), identical current rating (8 A), and identical forward voltage characteristics (1.3 V @ 8 A). The elevated voltage rating (400 V vs. 300 V) provides additional design margin without performance degradation. Both parts carry Automotive Grade qualification with AEC-Q101 certification, ROHS3 compliance, and identical operating temperature range. The FESB8GTHM3/I is currently in Active production status with 973 units in stock, ensuring long-term availability.

STTH1003SBY-TR Selection Criteria:

The STTH1003SBY-TR is suitable for applications where increased current capacity (10 A vs. 8 A) and improved reverse recovery time (35 ns vs. 50 ns) provide system-level benefits that justify PCB layout modification. This part requires transition from D2PAK to DPAK package, necessitating PCB redesign. The STTH1003SBY-TR maintains 300 V reverse voltage rating, Automotive Grade qualification, AEC-Q101 certification, and ROHS3 compliance. Operating temperature range extends to 175°C junction temperature, providing additional thermal margin. This part is currently in Active production status with 2700 units in stock.

Frequently Asked Questions (FAQ)

Q: Can FESB8GTHM3/I be used as a direct replacement for FESB8FTHE3_A/P without PCB modification?

A: Yes. The FESB8GTHM3/I uses identical TO-263AB D2PAK package geometry, identical lead spacing, and identical mounting footprint. No PCB layout changes are required. The elevated 400 V reverse voltage rating is backward compatible with 300 V circuit designs.

Q: What is the primary difference between FESB8GTHM3/I and STTH1003SBY-TR?

A: FESB8GTHM3/I maintains the D2PAK package and 8 A current rating with 400 V voltage capability. STTH1003SBY-TR transitions to DPAK package with 10 A current rating at 300 V. Package change requires PCB redesign; electrical performance differs in current capacity and reverse recovery time.

Q: Are both substitute parts qualified for automotive applications?

A: Yes. Both FESB8GTHM3/I and STTH1003SBY-TR carry Automotive Grade classification with AEC-Q101 qualification, matching the original FESB8FTHE3_A/P specification.

Q: What is the impact of the 50 ns reverse recovery time on circuit performance?

A: The 50 ns reverse recovery time (trr) for FESB8FTHE3_A/P and FESB8GTHM3/I classifies these parts as fast recovery diodes suitable for switching applications. The STTH1003SBY-TR offers improved 35 ns recovery time for applications requiring faster switching transitions.

Q: Does the STTH1003SBY-TR operating temperature range of -40°C to 175°C affect compatibility?

A: The STTH1003SBY-TR minimum junction temperature of -40°C is higher than the original part's -55°C specification. Applications requiring operation below -40°C must use FESB8FTHE3_A/P or FESB8GTHM3/I. The maximum temperature of 175°C provides additional thermal margin compared to the original 150°C specification.

Q: What compliance certifications apply to all three parts?

A: All three parts (FESB8FTHE3_A/P, FESB8GTHM3/I, and STTH1003SBY-TR) are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8541.10.0080. All carry Automotive Grade qualification with AEC-Q101 certification.

Q: Is PCB layout modification required for STTH1003SBY-TR substitution?

A: Yes. The STTH1003SBY-TR uses DPAK package (TO-252-3, SC-63) instead of D2PAK package (TO-263-3). Different lead spacing and footprint geometry require PCB redesign and re-layout.

Q: What is the inventory status for each part?

A: FESB8FTHE3_A/P has 801 units in stock (Last Time Buy status). FESB8GTHM3/I has 973 units in stock (Active status). STTH1003SBY-TR has 2700 units in stock (Active status).

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message