AOTF7N60FD N-Channel 600V 7A MOSFET Equivalent & Substitute Parts

Part Overview

The AOTF7N60FD is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 600V drain-to-source voltage with 7A continuous drain current in a TO-220-3 through-hole package. This device is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original component is no longer available or procurement is limited.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain-to-Source Voltage (Vdss)	600	V
Continuous Drain Current (Id) @ 25°C	7	A
On-State Resistance (Rds On) @ 3.5A, 10V	1.45	Ω
Gate Threshold Voltage (Vgs(th)) @ 250µA	4.2	V
Gate Charge (Qg) @ 10V	25	nC
Power Dissipation (Max)	39	W
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package	TO-220-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the AOTF7N60FD is determined by the following critical parameters:

Mandatory Compatibility Criteria:

FET Type: N-Channel (all substitutes must be N-Channel)
Package: TO-220-3 through-hole configuration (mechanical and thermal compatibility)
Drain-to-Source Voltage (Vdss): Minimum 600V (substitutes rated at 600V or higher are acceptable)
Continuous Drain Current (Id): Minimum 7A at 25°C (substitutes rated at 7A or higher are acceptable)
Operating Temperature Range: -55°C to 150°C (substitutes must support this range)
RoHS3 Compliance: Required for regulatory alignment

Secondary Compatibility Parameters:

On-State Resistance (Rds On): Lower or equivalent values ensure thermal performance
Gate Charge (Qg): Lower values reduce switching losses
Power Dissipation: Higher ratings provide thermal margin

Substitutes are grouped into two categories:

Category A – Direct Voltage/Current Equivalents (600V–650V, 5A–7A): These parts maintain the original voltage rating or operate within 50V above it, with current ratings at or above 7A. They provide the closest functional replacement with minimal circuit redesign.

Category B – Enhanced Voltage Rating (800V, 3.9A–6A): These parts exceed the original voltage specification, providing higher voltage headroom. Current ratings may be lower than the original 7A specification. These substitutes are suitable for applications where voltage margin is prioritized or where the circuit operates below the original 7A specification.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (Ω)	Qg (nC)	Power Diss. (W)	Temp. Range (°C)	Package	Status
AOTF7N60FD	Alpha & Omega	600	7	1.45	25	39	-55 to 150	TO-220-3	Not For New Designs
STP5NK60ZFP	STMicroelectronics	600	5	1.6	34	25	-55 to 150	TO-220-3	Active
TK5A65D(STA4,Q,M)	Toshiba	650	5	1.43	16	40	-55 to 150	TO-220-3	Active
STF5N62K3	STMicroelectronics	620	4.2	1.6	26	25	-55 to 150	TO-220-3	Active
FQPF8N80C	onsemi	800	8	1.55	45	59	-55 to 150	TO-220-3	Active
STP7NK80ZFP	STMicroelectronics	800	5.2	1.8	56	30	-55 to 150	TO-220-3	Active
STF6N80K5	STMicroelectronics	800	4.5	1.6	13	25	-55 to 150	TO-220-3	Active
TK6A80E,S4X	Toshiba	800	6	1.7	32	45	-55 to 150	TO-220-3	Active
IPA80R1K4CEXKSA2	Infineon	800	3.9	1.4	23	31	-40 to 150	TO-220-3	Active

Engineering Selection Recommendations

For Direct Replacement (Minimal Circuit Modification):

STP5NK60ZFP (STMicroelectronics) is the primary equivalent substitute. It maintains the 600V voltage rating and TO-220-3 package. Although the continuous drain current is rated at 5A (lower than the original 7A), this part is suitable for applications operating at or below 5A. The device is in Active product status with ROHS3 compliance and unlimited moisture sensitivity level. On-state resistance of 1.6Ω is comparable to the original 1.45Ω specification.

TK5A65D(STA4,Q,M) (Toshiba) provides a 650V rating with 5A continuous current. This part offers superior gate charge characteristics (16 nC versus 25 nC), reducing switching losses. Operating temperature range matches the original specification. This substitute is suitable for applications requiring lower switching losses or where the additional 50V voltage margin is beneficial.

For Applications Requiring Higher Voltage Margin:

FQPF8N80C (onsemi) is rated for 800V with 8A continuous drain current, exceeding both voltage and current specifications of the original part. This device provides the highest current capability among all substitutes and is suitable for applications where maximum current headroom is required. Power dissipation rating of 59W exceeds the original 39W specification.

STF6N80K5 (STMicroelectronics) offers 800V rating with 4.5A continuous current and exceptionally low gate charge (13 nC). This part is optimized for switching applications where gate charge minimization is critical. The reduced gate charge results in lower switching losses compared to the original device.

TK6A80E,S4X (Toshiba) provides 800V rating with 6A continuous current, offering a balance between voltage margin and current capability. Power dissipation rating of 45W provides thermal margin above the original 39W specification.

For Low-Temperature Applications:

IPA80R1K4CEXKSA2 (Infineon) operates from -40°C to 150°C, which is acceptable for applications not requiring the full -55°C lower temperature limit of the original device. This part features the lowest on-state resistance (1.4Ω) among all substitutes and is suitable for high-efficiency applications where conduction losses must be minimized.

Substitutes Not Recommended for Direct Replacement:

STF5N62K3 (STMicroelectronics) is rated for only 4.2A continuous current, which falls below the original 7A specification. This part is suitable only for applications confirmed to operate below 4.2A.

STP7NK80ZFP (STMicroelectronics) is rated for 5.2A continuous current at 800V. While the voltage rating is higher, the current rating is below the original 7A specification. This part is suitable for applications operating below 5.2A where voltage margin is required.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part rated for lower current than the original AOTF7N60FD?

A: Substitutes with lower current ratings (such as STP5NK60ZFP at 5A or STF5N62K3 at 4.2A) are acceptable only if your application operates at or below the substitute's rated current. The continuous drain current rating must not be exceeded under any operating condition. Verify your circuit's maximum current draw before selecting a lower-rated substitute.

Q: What is the advantage of using an 800V-rated substitute instead of a 600V equivalent?

A: 800V-rated substitutes provide higher voltage headroom, which increases safety margin in applications subject to voltage transients or overvoltage conditions. However, 800V devices typically have higher input capacitance and gate charge, which may increase switching losses. Select 800V substitutes only if your application requires the additional voltage margin or if 600V equivalents are unavailable.

Q: Are all substitute parts compatible with the original TO-220-3 footprint?

A: Yes. All substitute parts listed are packaged in TO-220-3 through-hole configuration and are mechanically compatible with the original AOTF7N60FD footprint. However, verify thermal management requirements, as some substitutes have different power dissipation ratings. Ensure your heatsink design accommodates the substitute's thermal characteristics.

Q: Why is the AOTF7N60FD marked as "Not For New Designs"?

A: This status indicates the part has reached end-of-life and is no longer recommended for new product development. Existing inventory may be available, but long-term supply cannot be guaranteed. For new designs or long-term production, select an active substitute part such as STP5NK60ZFP, TK5A65D, or FQPF8N80C.

Q: What is the difference between gate charge (Qg) specifications, and why does it matter?

A: Gate charge represents the total charge required to switch the MOSFET from off to on state. Lower gate charge reduces switching losses and allows faster switching speeds. For example, STF6N80K5 has 13 nC gate charge compared to the original 25 nC, resulting in lower switching losses. Select lower gate charge devices for high-frequency switching applications.

Q: Can I use IPA80R1K4CEXKSA2 in applications requiring -55°C operation?

A: No. IPA80R1K4CEXKSA2 is rated for -40°C to 150°C operating temperature, which does not meet the original -55°C lower limit. Use this substitute only in applications where the minimum operating temperature is -40°C or higher. For full -55°C to 150°C range compatibility, select STP5NK60ZFP, TK5A65D, STF5N62K3, STP7NK80ZFP, STF6N80K5, or TK6A80E,S4X.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant, matching the original AOTF7N60FD compliance status. All parts are also REACH unaffected and classified as EAR99 for export control purposes.

Q: What is the significance of on-state resistance (Rds On) when selecting a substitute?

A: On-state resistance determines conduction losses when the MOSFET is in the on state. Lower Rds On values reduce power dissipation and heat generation. The original AOTF7N60FD has 1.45Ω Rds On. Substitutes with comparable or lower Rds On (such as IPA80R1K4CEXKSA2 at 1.4Ω or TK5A65D at 1.43Ω) provide equivalent or better efficiency. Higher Rds On values increase conduction losses and may require enhanced thermal management.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message