FFPF15UP20STU Equivalent & Substitute Parts

Part Overview

The FFPF15UP20STU is a general-purpose rectifier diode manufactured by onsemi, rated for 200 V DC reverse voltage and 15 A average rectified current in a Through Hole TO-220-2 Full Pack configuration. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging options.

Substiute Parts

FFPF15UP20STU

onsemiIn Stock: 2235FFPF15UP20STU Datasheet

Current PartRFQ

FESF16DT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1300FESF16DT-E3/45 Datasheet

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STTH1502FP

STMicroelectronicsIn Stock: 1259STTH1502FP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FFPF15UP20STU is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 200 V minimum
• Current - Average Rectified (Io): 15 A minimum
• Mounting Type: Through Hole
• Package Category: TO-220-2 Full Pack variants
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Variation Ranges:

• Forward Voltage (Vf): Up to 1.15 V @ rated current
• Reverse Recovery Time (trr): Up to 45 ns
• Reverse Leakage Current: Up to 100 µA @ 200 V
• Operating Temperature - Junction (Max): 150°C minimum

The substitute parts STTH1502FP and FESF16DT-E3/45 satisfy these criteria with equivalent or superior electrical characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

STTH1502FP (STMicroelectronics) is the primary substitute for the FFPF15UP20STU. This part maintains identical voltage and current ratings while offering improved performance characteristics: forward voltage is reduced to 1.1 V @ 15 A, reverse recovery time is shortened to 36 ns, and reverse leakage current is reduced to 10 µA @ 200 V. The STTH1502FP carries active product status with ROHS3 compliance and supports an elevated maximum junction temperature of 175°C. The TO-220FPAC package is mechanically and electrically compatible with the original TO-220F-2L configuration.

FESF16DT-E3/45 (Vishay General Semiconductor - Diodes Division) serves as a secondary substitute with enhanced current capacity of 16 A. This part delivers superior forward voltage performance at 975 mV @ 16 A and the fastest reverse recovery time at 35 ns. The ITO-220AC package features an isolated tab variant of the TO-220-2 Full Pack, providing additional design flexibility for thermal management and isolation requirements. This part maintains active product status with REACH compliance.

Both substitutes satisfy all mandatory electrical and mechanical criteria. Selection between them depends on specific application requirements regarding current margin, thermal performance, and package isolation characteristics.

Frequently Asked Questions (FAQ)

Q: Can STTH1502FP directly replace FFPF15UP20STU in existing PCB designs?

A: Yes. The STTH1502FP maintains identical voltage (200 V) and current (15 A) ratings, operates within the same temperature range, and uses a mechanically compatible TO-220-2 Full Pack configuration. No PCB modifications are required.

Q: What is the difference between the TO-220FPAC and ITO-220AC packages?

A: Both are TO-220-2 Full Pack variants suitable for Through Hole mounting. The ITO-220AC (FESF16DT-E3/45) features an isolated tab, providing electrical isolation between the mounting tab and the semiconductor junction. The TO-220FPAC (STTH1502FP) uses a standard configuration. Package selection depends on thermal management and isolation requirements in the target application.

Q: Why does FESF16DT-E3/45 have a higher current rating (16 A) than the original part (15 A)?

A: The FESF16DT-E3/45 is rated for 16 A average rectified current, exceeding the original 15 A specification. This higher rating provides additional design margin and does not prevent substitution. The part operates safely at 15 A and below.

Q: Are there compliance differences between the substitutes?

A: STTH1502FP carries ROHS3 compliance certification. Both STTH1502FP and FESF16DT-E3/45 maintain REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity ratings, matching the original part's compliance profile.

Q: How do the reverse recovery times compare?

A: The original FFPF15UP20STU has a reverse recovery time of 45 ns. Both substitutes offer improved performance: STTH1502FP at 36 ns and FESF16DT-E3/45 at 35 ns. Faster recovery times reduce switching losses and improve efficiency in rectification applications.

Q: What is the significance of reduced reverse leakage current in the substitutes?

A: The original part specifies 100 µA @ 200 V reverse leakage. Both substitutes reduce this to 10 µA @ 200 V, representing a tenfold improvement. Lower leakage current reduces standby power consumption and improves circuit efficiency, particularly in high-voltage applications.

Q: Can I use FESF16DT-E3/45 in applications requiring exactly 15 A?

A: Yes. The FESF16DT-E3/45 is rated for 16 A average rectified current, which encompasses 15 A operation. The higher rating provides additional thermal and electrical margin without affecting compatibility or performance at the lower current level.