FR803 Equivalent & Substitute Parts

Part Overview

The FR803 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 200 V DC reverse voltage and 8 A average rectified current in a Through Hole TO-220AC package. This component is classified as Obsolete, necessitating identification of active equivalent and substitute parts for ongoing design and procurement requirements. The FR803 features fast recovery characteristics with a reverse recovery time of 150 ns and operates across a junction temperature range of -65°C to 175°C.

Substiute Parts

FR803

Diodes IncorporatedIn Stock: 2397FR803 Datasheet

Current PartRFQ

FES8GT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 3740FES8GT-E3/45 Datasheet

MFR RecommendedRFQ

SDUR820

SMC Diode SolutionsIn Stock: 1959SDUR820 Datasheet

MFR RecommendedRFQ

STTH1202D

STMicroelectronicsIn Stock: 1165STTH1202D Datasheet

MFR RecommendedRFQ

BYW29-200G

onsemiIn Stock: 35430BYW29-200G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FR803 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
• Current - Average Rectified (Io): Must equal or exceed 8 A
• Mounting Type: Through Hole
• Package / Case: TO-220-2 or TO-220AC equivalent
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA

Substitution Categories:

Manufacturer Recommended Substitutes meet or exceed all mandatory parameters with active product status and full compliance documentation.

Parametric Equivalents match the core electrical specifications (voltage, current, package) and provide direct functional replacement with identical performance characteristics.

Substitute parts are grouped based on voltage rating alignment and current capacity. Parts rated at 200 V with 8 A or higher current capacity provide direct replacement. Parts rated at higher voltages (400 V) provide enhanced voltage margin while maintaining current specifications.

Parameter Comparison

Engineering Selection Recommendations

FES8GT-E3/45 (Vishay General Semiconductor) is designated as the manufacturer-recommended substitute. This part maintains 8 A current capacity and provides enhanced voltage rating at 400 V, delivering superior voltage margin over the original 200 V specification. Reverse recovery time is improved to 50 ns. Product status is Active with full ROHS3 compliance. Operating temperature range is -55°C to 150°C, which is narrower than the FR803 but suitable for standard industrial applications.

SDUR820 (SMC Diode Solutions) provides voltage and package equivalence at 200 V with improved reverse recovery time of 35 ns and reduced reverse leakage current of 5 µA. Current rating is not specified in available documentation. Product status is Active with ROHS3 compliance. Operating temperature range is -55°C to 150°C.

STTH1202D (STMicroelectronics) exceeds current capacity at 12 A while maintaining 200 V voltage rating, providing current margin for applications requiring higher current handling. Reverse recovery time is 35 ns with reduced forward voltage of 1.1 V at 12 A. Product status is Active with ROHS3 compliance. Maximum junction temperature is 175°C, matching the FR803 upper limit.

BYW29-200G (onsemi) provides direct parametric equivalence with 200 V, 8 A ratings and identical operating temperature range of -65°C to 175°C. Reverse recovery time is 35 ns with reduced reverse leakage of 5 µA. Product status is Active with ROHS3 compliance. This part offers the closest thermal performance match to the FR803.

Selection criteria: Choose FES8GT-E3/45 for enhanced voltage margin applications. Select STTH1202D for designs requiring higher current capacity. Use BYW29-200G for direct thermal performance matching. SDUR820 is suitable where reverse recovery time optimization is prioritized.

Frequently Asked Questions (FAQ)

Q: Can FES8GT-E3/45 directly replace FR803 in all applications?

A: FES8GT-E3/45 is electrically compatible as a substitute. The 400 V rating provides voltage margin over the 200 V requirement. Operating temperature range is -55°C to 150°C versus FR803's -65°C to 175°C. Verify application temperature extremes do not exceed -55°C or 150°C before substitution.

Q: What is the difference between the substitute parts in terms of reverse recovery time?

A: FR803 has 150 ns reverse recovery time. FES8GT-E3/45 has 50 ns. SDUR820, STTH1202D, and BYW29-200G all have 35 ns. Faster recovery times reduce switching losses in high-frequency applications. All substitutes provide equal or superior performance in this parameter.

Q: Is STTH1202D suitable for applications designed for 8 A operation?

A: Yes. STTH1202D is rated for 12 A average rectified current, exceeding the 8 A requirement. The part operates at the same 200 V voltage rating and TO-220-2 package. Current capacity margin provides design flexibility without performance degradation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (FES8GT-E3/45, SDUR820, STTH1202D, BYW29-200G) are ROHS3 compliant, matching the FR803 compliance status.

Q: What is the significance of reverse leakage current differences?

A: FR803 specifies 10 µA reverse leakage at 200 V. SDUR820 and BYW29-200G specify 5 µA at 200 V, representing lower leakage. STTH1202D specifies 10 µA at 200 V, matching FR803. Lower leakage current reduces standby power consumption. All values are within acceptable ranges for general-purpose rectifier applications.

Q: Can BYW29-200G be used in applications with temperature extremes from -65°C to 175°C?

A: Yes. BYW29-200G operates across -65°C to 175°C, matching the FR803 temperature range exactly. This part is optimal for applications requiring full thermal performance equivalence.

Q: What packaging format is used for these substitute parts?

A: All substitute parts use Through Hole mounting in TO-220-2 or TO-220AC package configuration, providing direct mechanical compatibility with FR803 PCB layouts and thermal management requirements.