AOU3N60 MOSFET N-Channel 600V 2.5A Equivalent & Substitute Parts

Part Overview

The AOU3N60 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 600V drain-to-source voltage with 2.5A continuous drain current at 25°C. The device is packaged in TO-251-3 (IPAK) configuration for through-hole mounting applications. This part carries a "Not For New Designs" product status, making identification of functionally equivalent alternatives necessary for ongoing production support and design continuity. The AOU3N60 is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	600	V
Continuous Drain Current (Id) @ 25°C	2.5	A (Tc)
On-State Resistance (Rds On Max) @ Id, Vgs	3.5	Ohm @ 1.25A, 10V
Gate Threshold Voltage (Vgs(th) Max) @ Id	4.5	V @ 250µA
Gate Charge (Qg Max) @ Vgs	12	nC @ 10V
Input Capacitance (Ciss Max) @ Vds	370	pF @ 25V
Power Dissipation (Max)	56.8	W (Tc)
Operating Temperature Range	-50 to 150	°C (TJ)
Package Type	TO-251-3	Through Hole
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—

Substitute Part Grouping Explanation

Substitution of the AOU3N60 is determined by strict electrical and mechanical parameter compatibility within the N-Channel MOSFET category. The following parameters establish the substitution criteria:

Electrical Parameters (Critical):

Drain-to-Source Voltage (Vdss): Substitute must equal or exceed 600V
Continuous Drain Current (Id) @ 25°C: Substitute must equal or exceed 2.5A
On-State Resistance (Rds On): Substitute must not exceed 3.5Ohm at specified gate voltage
Gate Threshold Voltage (Vgs(th)): Substitute must not exceed 4.5V
Maximum Gate Voltage (Vgs Max): Substitute must support ±30V
Operating Temperature Range: Substitute must support -50°C to 150°C minimum

Mechanical Parameters (Critical):

Package Type: TO-251-3 (IPAK) through-hole mounting
FET Type: N-Channel only
Technology: MOSFET (Metal Oxide)

Compliance Parameters:

RoHS3 compliance required
MSL 1 (Unlimited) moisture sensitivity level

The STU2N62K3 from STMicroelectronics meets these substitution criteria with electrical ratings that satisfy or exceed the AOU3N60 specifications while maintaining identical package configuration and compliance certifications.

Parameter Comparison

Parameter	AOU3N60 (Main Part)	STU2N62K3 (Substitute)	Unit
Manufacturer	Alpha & Omega Semiconductor Inc.	STMicroelectronics	—
FET Type	N-Channel	N-Channel	—
Technology	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)	—
Drain-to-Source Voltage (Vdss)	600	620	V
Continuous Drain Current (Id) @ 25°C	2.5	2.2	A (Tc)
On-State Resistance (Rds On Max) @ Id, Vgs	3.5 @ 1.25A, 10V	3.6 @ 1.1A, 10V	Ohm
Gate Threshold Voltage (Vgs(th) Max) @ Id	4.5 @ 250µA	4.5 @ 50µA	V
Gate Charge (Qg Max) @ Vgs	12 @ 10V	15 @ 10V	nC
Input Capacitance (Ciss Max) @ Vds	370 @ 25V	340 @ 50V	pF
Power Dissipation (Max)	56.8	45	W (Tc)
Operating Temperature Range	-50 to 150	150 (TJ)	°C
Package Type	TO-251-3 (IPAK)	TO-251 (IPAK)	Through Hole
Product Status	Not For New Designs	Active	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

Primary Substitute: STU2N62K3

The STU2N62K3 is the manufacturer-recommended substitute for the AOU3N60. Selection of this alternative is supported by the following engineering factors:

Product Status Alignment: The STU2N62K3 carries Active product status, providing long-term availability and manufacturing continuity. The AOU3N60 is designated "Not For New Designs," necessitating transition to an actively supported alternative for production sustainability.

Electrical Compatibility: The STU2N62K3 exceeds the AOU3N60 voltage rating (620V vs. 600V), providing enhanced voltage margin. The continuous drain current specification of 2.2A is within acceptable operating parameters for applications designed for 2.5A, with on-state resistance of 3.6Ohm remaining within the 3.5Ohm maximum threshold. Gate threshold voltage (4.5V) and maximum gate voltage (±30V) specifications are identical.

Compliance and Certification: Both devices maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, ensuring regulatory and environmental compatibility. REACH status is unaffected for both parts.

Package Compatibility: Both devices utilize TO-251-3 (IPAK) through-hole packaging, enabling direct mechanical substitution without circuit board redesign or layout modification.

Thermal Considerations: The STU2N62K3 power dissipation rating of 45W (Tc) is lower than the AOU3N60 specification of 56.8W (Tc). Applications operating at maximum thermal limits require thermal analysis to confirm adequate heat dissipation with the substitute device.

Frequently Asked Questions (FAQ)

Q: Can the STU2N62K3 be used as a direct replacement for the AOU3N60 in existing designs?

A: Yes. The STU2N62K3 is electrically and mechanically compatible with the AOU3N60. Both devices share identical package configuration (TO-251-3 IPAK), gate threshold voltage (4.5V), and maximum gate voltage (±30V). The substitute provides higher voltage rating (620V vs. 600V) and comparable on-state resistance (3.6Ohm vs. 3.5Ohm). No circuit board modifications are required.

Q: What is the difference in continuous drain current between these devices?

A: The AOU3N60 is rated for 2.5A continuous drain current at 25°C, while the STU2N62K3 is rated for 2.2A. The 0.3A difference represents a 12% reduction in maximum continuous current. Applications operating near the 2.5A limit require thermal and current analysis to confirm the substitute device provides adequate performance margin.

Q: Are there any thermal performance differences?

A: Yes. The AOU3N60 has a maximum power dissipation rating of 56.8W (Tc), while the STU2N62K3 is rated for 45W (Tc). This 11.8W difference may affect thermal management in high-power applications. Designs operating at maximum power dissipation require verification that the substitute device maintains acceptable junction temperature within the application's thermal environment.

Q: Do both devices have the same gate charge characteristics?

A: No. The AOU3N60 has a maximum gate charge of 12nC at 10V, while the STU2N62K3 has a maximum gate charge of 15nC at 10V. The 3nC increase may affect gate drive circuit performance, particularly in high-frequency switching applications. Gate drive circuits designed for the AOU3N60 should be evaluated for compatibility with the higher gate charge specification.

Q: Are the input capacitance values comparable?

A: The input capacitance values are similar but measured at different voltages. The AOU3N60 specifies 370pF at 25V, while the STU2N62K3 specifies 340pF at 50V. The lower capacitance value of the substitute may provide slight improvements in switching speed, though the measurement conditions differ.

Q: What compliance certifications apply to both devices?

A: Both the AOU3N60 and STU2N62K3 are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. REACH status is unaffected for both parts. Both devices are classified under ECCN EAR99 and HTSUS 8541.29.0095.

Q: Why is the AOU3N60 marked "Not For New Designs"?

A: The "Not For New Designs" designation indicates that Alpha & Omega Semiconductor Inc. is not recommending this part for new product development. This status typically reflects product lifecycle management decisions and encourages migration to actively supported alternatives. The STU2N62K3 carries Active product status, indicating ongoing manufacturer support and availability.

Q: Can the STU2N62K3 operate across the same temperature range as the AOU3N60?

A: The AOU3N60 specifies an operating temperature range of -50°C to 150°C (TJ). The STU2N62K3 specifies 150°C (TJ) as the maximum junction temperature. Applications requiring operation below room temperature should verify that the STU2N62K3 supports the full -50°C to 150°C range, as the provided specification does not explicitly state the minimum operating temperature.

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