AOTF296L N-Channel MOSFET 100V 10A/41A TO-220F Equivalent & Substitute Parts

Part Overview

The AOTF296L is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 100V drain-to-source voltage with continuous drain current of 10A at Ta (ambient temperature) and 41A at Tc (case temperature). The device is housed in a TO-220F through-hole package and features a maximum on-resistance of 10mOhm at 20A and 10V gate-source voltage.

The AOTF296L carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this MOSFET.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	100	V
Continuous Drain Current @ 25°C (Ta)	10	A
Continuous Drain Current @ 25°C (Tc)	41	A
On-Resistance (Rds On) Max @ 20A, 10V	10	mOhm
Gate-Source Threshold Voltage (Vgs(th)) Max @ 250µA	3.4	V
Gate Charge (Qg) Max @ 10V	52	nC
Maximum Gate-Source Voltage (Vgs Max)	±20	V
Input Capacitance (Ciss) Max @ 50V	2785	pF
Power Dissipation Max (Ta)	2.2	W
Power Dissipation Max (Tc)	36.5	W
Operating Temperature Range (TJ)	-55 to 175	°C
Package Type	TO-220F	Through Hole
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the AOTF296L is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 100V
Continuous Drain Current (Tc): Must equal or exceed 41A to maintain current-handling capability
On-Resistance (Rds On): Must not exceed 10mOhm at rated conditions to preserve efficiency
Gate-Source Voltage Compatibility (Vgs Max): Must accommodate ±20V or greater
Package Type: Must be through-hole TO-220 variant (TO-220F, TO-220AB, or TO-220SIS)
Operating Temperature Range: Must support -55°C to 175°C junction temperature
Compliance: RoHS3 compliance and MSL Level 1 required

Substitute Parts Identified:

IRFI4410ZPBF (Infineon Technologies): Meets 100V Vdss and exceeds 41A continuous drain current at 43A (Tc). On-resistance of 9.3mOhm at 26A, 10V is superior. TO-220AB Full-Pak package. RoHS3 compliant.
TK34A10N1,S4X (Toshiba Semiconductor and Storage): Meets 100V Vdss with 34A continuous drain current (Tc). On-resistance of 9.5mOhm at 17A, 10V. TO-220SIS package. Active product status. RoHS3 compliant.
TK40A10N1,S4X (Toshiba Semiconductor and Storage): Meets 100V Vdss with 40A continuous drain current (Tc). On-resistance of 8.2mOhm at 20A, 10V. TO-220SIS package. Active product status. RoHS3 compliant.
TK46A08N1,S4X (Toshiba Semiconductor and Storage): Rated at 80V Vdss (below 100V specification) with 46A continuous drain current (Tc). On-resistance of 8.4mOhm at 23A, 10V. TO-220SIS package. Active product status. RoHS3 compliant. This part is suitable only for applications with maximum operating voltage of 80V or lower.

Parameter Comparison

Parameter	AOTF296L	IRFI4410ZPBF	TK34A10N1,S4X	TK40A10N1,S4X	TK46A08N1,S4X	Unit
Manufacturer	Alpha & Omega Semiconductor Inc.	Infineon Technologies	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage
Drain-to-Source Voltage (Vdss)	100	100	100	100	80	V
Continuous Drain Current (Tc)	41	43	34	40	46	A
On-Resistance (Rds On) Max @ 10V	10	9.3	9.5	8.2	8.4	mOhm
Gate-Source Threshold Voltage (Vgs(th)) Max	3.4	4	4	4	4	V
Gate Charge (Qg) Max @ 10V	52	110	38	49	37	nC
Maximum Gate-Source Voltage (Vgs Max)	±20	±30	±20	±20	±20	V
Input Capacitance (Ciss) Max @ 50V	2785	4910	2600	3000	2500	pF
Power Dissipation Max (Tc)	36.5	47	35	35	35	W
Operating Temperature Range (TJ)	-55 to 175	-55 to 175	-55 to 150	-55 to 150	-55 to 150	°C
Package Type	TO-220F	TO-220AB Full-Pak	TO-220SIS	TO-220SIS	TO-220SIS
Product Status	Obsolete	Not For New Designs	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: TK40A10N1,S4X

The TK40A10N1,S4X from Toshiba Semiconductor and Storage is the recommended primary substitute for the AOTF296L. This device meets all critical electrical parameters: 100V Vdss, 40A continuous drain current at Tc (approaching the original 41A specification), and superior on-resistance of 8.2mOhm at 20A and 10V. The part carries Active product status, ensuring long-term availability and supply chain stability. RoHS3 compliance and MSL Level 1 rating match the original specification. The TO-220SIS package is mechanically compatible with TO-220F applications through standard through-hole mounting.

Secondary Substitute: TK34A10N1,S4X

The TK34A10N1,S4X is suitable for applications where continuous drain current requirements are 34A or lower. This device maintains 100V Vdss rating and delivers on-resistance of 9.5mOhm at 17A and 10V. Active product status and full compliance certifications support production continuity. Gate charge of 38nC is lower than the original, reducing switching losses in gate-drive circuits.

Alternative Substitute: IRFI4410ZPBF

The IRFI4410ZPBF from Infineon Technologies exceeds the original 41A continuous drain current specification at 43A (Tc) and delivers superior on-resistance of 9.3mOhm at 26A and 10V. The device supports ±30V gate-source voltage, providing additional margin over the original ±20V specification. However, this part carries Not For New Designs status, limiting its suitability for new production programs. The TO-220AB Full-Pak package is mechanically compatible with through-hole mounting.

Limited Voltage Substitute: TK46A08N1,S4X

The TK46A08N1,S4X is restricted to applications with maximum operating voltage of 80V or lower due to its reduced Vdss rating. This device offers the highest continuous drain current at 46A (Tc) and lowest on-resistance at 8.4mOhm at 23A and 10V. Active product status and full compliance certifications are present. Use this part only when circuit design confirms that 80V Vdss is sufficient for the application.

Compliance and Availability:

All substitute parts maintain RoHS3 compliance and MSL Level 1 rating, ensuring compatibility with existing manufacturing and assembly processes. TK34A10N1,S4X and TK40A10N1,S4X carry Active product status, providing the strongest assurance of long-term availability and supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the TK46A08N1,S4X be used as a direct replacement for the AOTF296L?

A: The TK46A08N1,S4X is not a direct replacement due to its reduced drain-to-source voltage rating of 80V compared to the original 100V specification. This part is suitable only for applications where the maximum operating voltage does not exceed 80V. For applications requiring the full 100V rating, use TK40A10N1,S4X or TK34A10N1,S4X instead.

Q: What is the difference between TO-220F, TO-220AB, and TO-220SIS packages?

A: All three are through-hole TO-220 package variants with identical pin configurations and mechanical mounting compatibility. TO-220F, TO-220AB, and TO-220SIS differ in internal construction and thermal characteristics but are mechanically interchangeable in standard through-hole PCB applications. Verify thermal performance requirements for your specific application.

Q: Why is the IRFI4410ZPBF marked as "Not For New Designs"?

A: The Not For New Designs status indicates that while the part remains available, the manufacturer does not recommend its use in new product development. For new designs, prioritize TK40A10N1,S4X or TK34A10N1,S4X, which carry Active product status and provide manufacturer support for ongoing production.

Q: Does the higher gate charge of IRFI4410ZPBF (110nC) affect circuit performance?

A: Higher gate charge increases the energy required to switch the MOSFET on and off, resulting in higher gate-drive power consumption and potentially slower switching transitions. For applications with tight gate-drive power budgets or high switching frequencies, TK34A10N1,S4X (38nC) or TK46A08N1,S4X (37nC) may be preferable due to lower gate charge.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed—IRFI4410ZPBF, TK34A10N1,S4X, TK40A10N1,S4X, and TK46A08N1,S4X—carry RoHS3 compliance certification and MSL Level 1 rating, matching the original AOTF296L specification.

Q: What is the maximum junction temperature difference between the original and substitute parts?

A: The AOTF296L supports -55°C to 175°C junction temperature. TK34A10N1,S4X, TK40A10N1,S4X, and TK46A08N1,S4X support -55°C to 150°C, representing a 25°C reduction in maximum junction temperature. IRFI4410ZPBF maintains the full -55°C to 175°C range. Verify thermal design margins for applications operating near 150°C.

Q: Can I use TK34A10N1,S4X if my application requires 40A continuous drain current?

A: No. The TK34A10N1,S4X is rated for 34A continuous drain current at Tc. Using this part in an application requiring 40A would exceed its continuous current rating and result in excessive junction temperature rise and potential device failure. Use TK40A10N1,S4X for 40A applications.

Q: How do I verify that a substitute part is compatible with my circuit?

A: Compare the following parameters between the original AOTF296L and the substitute: (1) Drain-to-Source Voltage (Vdss) must equal or exceed circuit maximum voltage, (2) Continuous Drain Current (Tc) must equal or exceed circuit maximum current, (3) On-Resistance (Rds On) must not exceed circuit power dissipation limits, (4) Gate-Source Voltage (Vgs Max) must accommodate your gate-drive circuit voltage, and (5) Operating Temperature Range must cover your application's thermal environment.

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