FDPF6N60ZUT N-Channel 600V 4.5A MOSFET Equivalent & Substitute Parts

Part Overview

The FDPF6N60ZUT is an N-Channel 600V 4.5A MOSFET manufactured by onsemi in the UniFET™ series, housed in a TO-220F-3 through-hole package. This device is rated for 33.8W power dissipation and operates across a temperature range of -55°C to 150°C. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Substitute parts must maintain functional compatibility within the specified electrical and mechanical parameters while accommodating the constraints of modern component availability and manufacturing standards.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	600	V
Continuous Drain Current (Id) @ 25°C	4.5	A
Rds On (Max) @ Id, Vgs	2	Ω @ 2.25A, 10V
Gate Threshold Voltage (Vgs(th)) @ Id	5	V @ 250µA
Gate Charge (Qg) @ Vgs	20	nC @ 10V
Power Dissipation (Max)	33.8	W
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3 Full Pack	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FDPF6N60ZUT is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): 600V nominal (600V to 800V acceptable for higher voltage tolerance applications)
Continuous Drain Current (Id): 4.5A nominal (4A to 5A range acceptable)
On-State Resistance (Rds On): 2Ω maximum (2Ω to 2.5Ω acceptable)
Gate Threshold Voltage (Vgs(th)): 5V nominal (4.4V to 5V acceptable)
Power Dissipation: 33.8W (20W to 40W acceptable depending on thermal design)
Mounting Type: Through Hole TO-220 package variants (TO-220F, TO-220FP, TO-220FM, TO-220SIS)
Operating Temperature: -55°C to 150°C minimum

Substitution Logic: Parts are grouped into two categories based on voltage rating:

600V Voltage Class (Direct voltage compatibility): AOTF4N60L, STP4NK60ZFP, STF4N62K3
800V Voltage Class (Higher voltage tolerance): R8005ANX, STF4N80K5, STP5NK80ZFP

Parts within the 600V class provide direct electrical substitution. Parts in the 800V class offer enhanced voltage margin and are suitable for applications where higher voltage transient immunity is beneficial, provided thermal and current requirements remain within specification.

Parameter Comparison

Parameter	FDPF6N60ZUT	AOTF4N60L	STP4NK60ZFP	STF4N62K3	R8005ANX	STF4N80K5	STP5NK80ZFP	STF3N62K3	TK3A65D
Manufacturer	onsemi	Alpha & Omega	STMicroelectronics	STMicroelectronics	Rohm	STMicroelectronics	STMicroelectronics	STMicroelectronics	Toshiba
Vdss (V)	600	600	600	620	800	800	800	620	650
Id @ 25°C (A)	4.5	4	4	3.8	5	3	4.3	2.7	3
Rds On (Max) (Ω)	2	2.2	2	2	2.08	2.5	2.4	2.5	2.25
Vgs(th) (V)	5	4.5	4.5	4.5	5	5	4.5	4.5	4.4
Qg (nC)	20	18	26	22	21	10.5	45.5	13	11
Power Dissipation (W)	33.8	35	25	25	40	20	30	20	35
Operating Temp (°C)	-55 to 150	-55 to 150	0 to 150	0 to 150	0 to 150	-55 to 150	-55 to 150	0 to 150	0 to 150
Package	TO-220F-3	TO-220F	TO-220FP	TO-220FP	TO-220FM	TO-220FP	TO-220FP	TO-220FP	TO-220SIS
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (600V Voltage Class):

STP4NK60ZFP (STMicroelectronics) is the recommended primary substitute. This part maintains identical Vdss (600V) and Rds On (2Ω) specifications, with continuous drain current of 4A, which is within 89% of the original 4.5A rating. The part is in active production status with ROHS3 compliance and unlimited moisture sensitivity level. Operating temperature range extends to 150°C maximum. Gate charge of 26 nC is slightly elevated compared to the original 20 nC, which may result in marginally increased switching losses in high-frequency applications. Inventory availability is substantial at 125,200 units.

AOTF4N60L (Alpha & Omega Semiconductor Inc.) provides an alternative 600V substitute with 4A continuous drain current and 2.2Ω on-state resistance. Power dissipation rating of 35W exceeds the original 33.8W specification. This part is active and ROHS3 compliant with 2,789 units in stock. Gate charge of 18 nC is lower than the original specification, resulting in reduced switching losses.

STF4N62K3 (STMicroelectronics) operates at 620V, providing 2% higher voltage rating than the original part. Continuous drain current is 3.8A (84% of original), with matching 2Ω on-state resistance. This part is in the SuperMESH3™ series and is active with 15,365 units available. Operating temperature maximum is 150°C.

Secondary Substitutes (800V Voltage Class):

STP5NK80ZFP (STMicroelectronics) and STF4N80K5 (STMicroelectronics) operate at 800V, providing 33% higher voltage margin. These parts are suitable for applications requiring enhanced transient voltage immunity. STP5NK80ZFP delivers 4.3A continuous drain current with 2.4Ω on-state resistance and 30W power dissipation. STF4N80K5 provides 3A continuous drain current with 2.5Ω on-state resistance and 20W power dissipation. Both are active, ROHS3 compliant, and support the full -55°C to 150°C operating temperature range.

R8005ANX (Rohm Semiconductor) is an 800V, 5A device with 2.08Ω on-state resistance and 40W power dissipation. This part offers the highest current capability among substitutes. Operating temperature maximum is 150°C. Inventory is 5,200 units.

Tertiary Substitute (650V Voltage Class):

TK3A65D (Toshiba Semiconductor) operates at 650V with 3A continuous drain current and 2.25Ω on-state resistance. This part is in the π-MOSVII series and is active with ROHS3 compliance. Operating temperature maximum is 150°C. This part is suitable for applications where moderate voltage margin above 600V is beneficial.

Selection Criteria Summary:

For direct replacement with minimal design changes: STP4NK60ZFP
For enhanced voltage margin with maintained current capability: STP5NK80ZFP
For maximum current capability at higher voltage: R8005ANX
For lowest gate charge and switching losses: AOTF4N60L
For applications requiring full temperature range (-55°C to 150°C): STP4NK60ZFP, STF4N80K5, or STP5NK80ZFP

All recommended substitutes are ROHS3 compliant and in active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can I use an 800V rated MOSFET as a direct replacement for the 600V FDPF6N60ZUT?

A: Yes. The 800V parts (STP5NK80ZFP, STF4N80K5, R8005ANX) are electrically compatible and provide enhanced voltage margin. No circuit modifications are required. The higher voltage rating does not degrade performance in 600V applications; it only provides additional transient voltage protection. Verify that the continuous drain current and on-state resistance specifications meet your application requirements.

Q: What is the significance of the different TO-220 package variants (TO-220F, TO-220FP, TO-220FM, TO-220SIS)?

A: All variants are through-hole TO-220-3 packages with identical pin configurations and mechanical footprints. The suffix letters indicate minor manufacturing or thermal interface variations. TO-220F, TO-220FP, TO-220FM, and TO-220SIS are mechanically interchangeable on standard TO-220 PCB layouts. Verify mounting hardware compatibility if using non-standard heatsink configurations.

Q: Why does STP4NK60ZFP have a higher gate charge (26 nC) than the original FDPF6N60ZUT (20 nC)?

A: Gate charge variation reflects differences in internal device architecture and manufacturing process between onsemi and STMicroelectronics. Higher gate charge results in slightly increased switching losses and longer switching times in high-frequency applications. For most industrial applications operating below 100 kHz, this difference is negligible. For applications above 200 kHz, consider AOTF4N60L (18 nC) or STF4N80K5 (10.5 nC) for lower switching losses.

Q: Is the FDPF6N60ZUT truly obsolete, or can it still be sourced?

A: The FDPF6N60ZUT is listed as obsolete by the manufacturer. While legacy inventory may exist through secondary distributors, new production has ceased. For new designs and long-term production runs, selection of an active substitute part is required to ensure supply chain continuity and compliance with current manufacturing standards.

Q: What is the difference between continuous drain current (Id) ratings of 4A, 4.3A, and 4.5A?

A: These ratings represent the maximum continuous current the device can conduct at 25°C case temperature without exceeding thermal limits. The FDPF6N60ZUT is rated for 4.5A. Substitutes with 4A or 4.3A ratings are suitable for applications drawing up to those respective currents. If your application requires the full 4.5A continuously, verify that the substitute part's current rating meets or exceeds this requirement. For applications drawing less than 4A, all listed substitutes are acceptable.

Q: Do all substitute parts support the full -55°C to 150°C operating temperature range of the original FDPF6N60ZUT?

A: No. STP4NK60ZFP, STF4N62K3, STF3N62K3, AOTF4N60L, R8005ANX, and TK3A65D are rated to 0°C minimum (not -55°C). Only STP5NK80ZFP, STF4N80K5, and the original FDPF6N60ZUT support -55°C to 150°C. For applications requiring operation below 0°C, select STP5NK80ZFP or STF4N80K5.

Q: What does ROHS3 compliance mean for these MOSFET parts?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive 3, which restricts the use of specific hazardous materials including lead, cadmium, mercury, and certain brominated flame retardants. All listed substitute parts are ROHS3 compliant, ensuring compatibility with modern procurement standards and environmental regulations.

Q: How do I determine which substitute is best for my specific application?

A: Identify the three most critical parameters for your application: (1) continuous drain current requirement, (2) operating temperature range, and (3) switching frequency. Match these to the substitute part specifications. For 4.5A continuous current at -55°C to 150°C, use STP5NK80ZFP or STF4N80K5. For 4A at 0°C to 150°C, use STP4NK60ZFP. For high-frequency switching (>200 kHz), prioritize lower gate charge values.

Q: Are there any thermal considerations when substituting these parts?

A: Yes. Power dissipation ratings vary from 20W to 40W across the substitute list. Verify that your heatsink design accommodates the substitute part's power dissipation rating. Parts with lower power ratings (STF4N80K5, STF3N62K3 at 20W) require more efficient thermal management than the original 33.8W part. Conversely, parts with higher ratings (R8005ANX at 40W, AOTF4N60L at 35W) provide additional thermal margin.

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