FESB8HTHE3_A/I Equivalent & Substitute Parts

Part Overview

The FESB8HTHE3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 500 V DC reverse voltage and 8 A average rectified current in a surface mount TO-263AB (D2PAK) package. This device is classified as Last Time Buy, indicating discontinued production. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for ongoing production and field service applications.

Substiute Parts

FESB8HTHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 818FESB8HTHE3_A/I Datasheet

Current PartRFQ

FESB8JTHM3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1055FESB8JTHM3/I Datasheet

MFR RecommendedRFQ

STTH8R06GY-TR

STMicroelectronicsIn Stock: 3153STTH8R06GY-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FESB8HTHE3_A/I is determined by the following criteria:

Mandatory Compatibility Parameters:

• Current - Average Rectified (Io): 8 A (exact match required)
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Grade: Automotive (exact match required)
• Qualification: AEC-Q101 (exact match required)

Allowable Variation Parameters:

• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 500 V
• Voltage - Forward (Vf) (Max) @ If: Equal to or less than 1.5 V @ 8 A
• Reverse Recovery Time (trr): Equal to or less than 50 ns
• Current - Reverse Leakage @ Vr: Equal to or less than 10 µA at rated voltage
• Operating Temperature - Junction: Range must encompass or exceed -55°C to 150°C

Substitute parts identified in this reference meet all mandatory compatibility parameters and satisfy allowable variation criteria.

Parameter Comparison

Engineering Selection Recommendations

FESB8JTHM3/I (Vishay General Semiconductor - Diodes Division)

This substitute is manufactured by the same supplier as the main part and maintains identical electrical performance characteristics at the 8 A operating point. The 600 V reverse voltage rating provides enhanced margin over the 500 V specification. Product status is Active, ensuring long-term availability. AEC-Q101 qualification and automotive grade certification are maintained. Operating temperature range remains -55°C to 150°C. This part is the preferred substitute for direct replacement in existing designs.

STTH8R06GY-TR (STMicroelectronics)

This substitute meets all mandatory compatibility requirements with identical 8 A current rating, D2PAK package, automotive grade, and AEC-Q101 qualification. The 600 V reverse voltage rating exceeds the original specification. Reverse recovery time of 45 ns is superior to the 50 ns specification. Operating temperature range extends to 175°C, providing additional thermal margin. Forward voltage at 8 A is 3.2 V, which exceeds the 1.5 V maximum of the original part. Reverse leakage current is 30 µA at 600 V, higher than the 10 µA specification. This part is suitable for applications where forward voltage and leakage current variations are acceptable within system design tolerances.

Frequently Asked Questions (FAQ)

Q: Can FESB8JTHM3/I be used as a direct replacement for FESB8HTHE3_A/I?

A: Yes. FESB8JTHM3/I is a direct substitute. Both parts share identical current rating (8 A), package (TO-263AB D2PAK), forward voltage (1.5 V @ 8 A), reverse recovery time (50 ns), automotive grade, and AEC-Q101 qualification. The 600 V reverse voltage rating of FESB8JTHM3/I exceeds the 500 V requirement, providing additional design margin.

Q: What are the differences between STTH8R06GY-TR and the original FESB8HTHE3_A/I?

A: STTH8R06GY-TR differs in two electrical parameters. Forward voltage is 3.2 V @ 8 A compared to 1.5 V @ 8 A in the original part. Reverse leakage current is 30 µA @ 600 V compared to 10 µA @ 500 V. All other parameters including current rating, package, speed classification, temperature range, automotive grade, and AEC-Q101 qualification are compatible. These differences must be evaluated against application requirements.

Q: Are all substitute parts in the same package?

A: Yes. All parts listed use the TO-263-3, D2PAK (2 Leads + Tab), TO-263AB package. Surface mount mounting type is identical across all parts. PCB layout and thermal management considerations remain unchanged.

Q: What is the significance of the Last Time Buy status for FESB8HTHE3_A/I?

A: Last Time Buy status indicates that the manufacturer has discontinued production of this part. Both substitute parts listed have Active product status, ensuring continued availability for future procurement and production requirements.

Q: Do all parts meet automotive qualification requirements?

A: Yes. FESB8HTHE3_A/I, FESB8JTHM3/I, and STTH8R06GY-TR are all classified as Automotive grade with AEC-Q101 qualification. All parts are suitable for automotive applications.

Q: How do the operating temperature ranges compare?

A: FESB8HTHE3_A/I and FESB8JTHM3/I both operate from -55°C to 150°C junction temperature. STTH8R06GY-TR extends the upper limit to 175°C, providing additional thermal margin in high-temperature environments. The lower temperature limit for STTH8R06GY-TR is -40°C, which is less stringent than the -55°C specification of the original part.

Q: What is the inventory status of these parts?

A: FESB8HTHE3_A/I has 775 pieces in stock (Last Time Buy status). FESB8JTHM3/I has 947 pieces in stock (Active status). STTH8R06GY-TR has 3100 pieces in stock (Active status). Inventory levels reflect current availability at the time of this reference.