FFPF40U60STU Equivalent & Substitute Parts

Part Overview

The FFPF40U60STU is a general-purpose rectifier diode manufactured by onsemi, rated for 600 V DC reverse voltage and 40 A average rectified current in a Through Hole TO-220F-2L package. This part is classified as Obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. The diode utilizes Avalanche technology with fast recovery characteristics suitable for power conversion applications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	40 A
Voltage - Forward (Vf) (Max) @ If	2.1 V @ 40 A
Reverse Recovery Time (trr)	110 ns
Current - Reverse Leakage @ Vr	20 µA @ 600 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Through Hole
Package / Case	TO-220-2 Full Pack
Operating Temperature - Junction	-65°C ~ 150°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the FFPF40U60STU is determined by the following critical parameters: voltage rating (600 V minimum), current rating (40 A minimum), package type (Through Hole TO-220 family), and speed classification (Fast Recovery). The substitute parts listed below are grouped based on their ability to meet or exceed these electrical specifications while maintaining mechanical compatibility.

The provided substitute list includes components with reduced current ratings (15 A and 12 A) compared to the original 40 A specification. These lower-current devices are not direct functional equivalents for applications requiring the full 40 A capacity. However, they are listed as substitutes in the source data and are presented here for reference in applications where current requirements are lower than the original design specification.

Direct equivalents maintaining the 40 A current rating are not present in the provided substitute list. Selection of any substitute part requires verification that the application current demand does not exceed the substitute device's rated current capacity.

Parameter Comparison

Parameter	FFPF40U60STU	MURF1560G	IDV15E65D2XKSA1	STTH12S06FP	STTH15AC06FP
Manufacturer	onsemi	onsemi	Infineon Technologies	STMicroelectronics	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	650 V	600 V	600 V
Current - Average Rectified (Io)	40 A	15 A	15 A	12 A	15 A
Voltage - Forward (Vf) (Max) @ If	2.1 V @ 40 A	1.5 V @ 15 A	2.2 V @ 15 A	3.4 V @ 12 A	1.9 V @ 15 A
Reverse Recovery Time (trr)	110 ns	60 ns	47 ns	21 ns	55 ns
Current - Reverse Leakage @ Vr	20 µA @ 600 V	10 µA @ 600 V	40 µA @ 650 V	30 µA @ 600 V	2 µA @ 600 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-2 Full Pack	TO-220-2 Full Pack	TO-220-2	TO-220-2 Full Pack, Isolated Tab	TO-220-2 Full Pack
Operating Temperature - Junction (Max)	150°C	175°C	175°C	175°C	175°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MURF1560G (onsemi): Active product status with ROHS3 compliance. Maintains 600 V voltage rating and Fast Recovery speed classification. Current rating reduced to 15 A. Reverse recovery time improved to 60 ns. Operating temperature range extended to 175°C maximum. Suitable for applications with current requirements not exceeding 15 A.

IDV15E65D2XKSA1 (Infineon Technologies): Active product status with ROHS3 compliance. Voltage rating increased to 650 V, providing margin above the original 600 V specification. Current rating reduced to 15 A. Reverse recovery time improved to 47 ns. Operating temperature range extended to 175°C maximum. TO-220-2 package maintains mechanical compatibility. Suitable for applications with current requirements not exceeding 15 A and requiring higher voltage margin.

STTH12S06FP (STMicroelectronics): Active product status with ROHS3 compliance. Maintains 600 V voltage rating and Fast Recovery speed classification. Current rating reduced to 12 A. Reverse recovery time significantly improved to 21 ns. Package includes isolated tab option (TO-220FPAC). Operating temperature range extended to 175°C maximum. Suitable for applications with current requirements not exceeding 12 A.

STTH15AC06FP (STMicroelectronics): Active product status with ROHS3 compliance. Maintains 600 V voltage rating and Fast Recovery speed classification. Current rating reduced to 15 A. Reverse recovery time improved to 55 ns. Reverse leakage current significantly reduced to 2 µA at 600 V. Operating temperature range extended to 175°C maximum. Suitable for applications with current requirements not exceeding 15 A and requiring low leakage characteristics.

All substitute parts are classified as Active products, ensuring ongoing availability and manufacturing support. All substitute parts meet ROHS3 compliance requirements. Selection must account for the reduced current ratings relative to the original 40 A specification.

Frequently Asked Questions (FAQ)

Q: Can the MURF1560G, IDV15E65D2XKSA1, STTH12S06FP, or STTH15AC06FP directly replace the FFPF40U60STU in all applications?

A: No. All listed substitute parts have reduced current ratings (12 A to 15 A) compared to the original 40 A specification. Direct replacement is only possible in applications where the actual circuit current demand does not exceed the substitute device's rated current. Circuit redesign or parallel device configuration may be required for applications requiring the full 40 A capacity.

Q: What is the primary difference between the substitute parts?

A: The substitute parts differ in current rating (12 A or 15 A), reverse recovery time (21 ns to 60 ns), reverse leakage current (2 µA to 40 µA), and forward voltage drop characteristics. STTH15AC06FP offers the lowest reverse leakage current at 2 µA. STTH12S06FP offers the fastest reverse recovery time at 21 ns. MURF1560G and STTH15AC06FP both support 15 A current rating.

Q: Are all substitute parts available in the same TO-220 package?

A: All substitute parts use Through Hole mounting in the TO-220 family. STTH12S06FP and STTH15AC06FP are available in TO-220FPAC with isolated tab option. MURF1560G uses TO-220FP. IDV15E65D2XKSA1 uses TO-220-2. Mechanical fit in existing PCB layouts requires verification of specific package variant dimensions.

Q: What is the product status of the FFPF40U60STU, and why does this matter?

A: The FFPF40U60STU is classified as Obsolete. This status indicates the part is no longer manufactured and existing inventory will eventually be depleted. All listed substitute parts are classified as Active, ensuring continued manufacturing support and availability for new designs and production.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All substitute parts are ROHS3 compliant. The original FFPF40U60STU does not specify RoHS status in the provided data.

Q: Which substitute part offers the best reverse recovery time performance?

A: STTH12S06FP offers the fastest reverse recovery time at 21 ns, compared to 110 ns for the original part. This improvement reduces switching losses in power conversion applications. However, this part is limited to 12 A current rating.

Q: Can I use multiple substitute parts in parallel to achieve higher current capacity?

A: Parallel configuration of diodes requires careful thermal and current distribution analysis beyond the scope of this substitution reference. Consult application-specific design guidelines and thermal management requirements.

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