AOD4454 N-Channel MOSFET 150V 3A/20A TO-252 Equivalent & Substitute Parts

Part Overview

The AOD4454 is an N-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) manufactured by Alpha & Omega Semiconductor Inc., rated for 150V drain-to-source voltage with continuous drain current of 3A at Ta and 20A at Tc. The device is housed in a Surface Mount TO-252 (DPAK) package and is classified as Active product status with ROHS3 compliance.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining the same package form factor and mounting technology. Substitution becomes necessary due to inventory availability, supply chain considerations, or design optimization requirements within the allowed electrical specifications.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	150	V
Continuous Drain Current @ 25°C (Ta)	3	A
Continuous Drain Current @ 25°C (Tc)	20	A
Rds On (Max) @ 10A, 10V	94	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4.6	V
Gate Charge (Qg) @ 10V	20	nC
Input Capacitance (Ciss) @ 75V	985	pF
Power Dissipation (Ta)	2.5	W
Power Dissipation (Tc)	100	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-252 (DPAK)	Surface Mount
Gate Voltage (Vgs) Max	±20	V

Substitute Part Grouping Explanation

Substitute parts for the AOD4454 are qualified based on the following electrical and mechanical criteria:

Critical Matching Parameters:

Drain to Source Voltage (Vdss): 150V (exact match required)
Package Type: TO-252 (DPAK) Surface Mount (exact match required)
FET Type: N-Channel (exact match required)
Technology: MOSFET Metal Oxide (exact match required)
Mounting Type: Surface Mount (exact match required)

Allowable Variation Parameters:

Continuous Drain Current (Id @ Tc): Minimum 18A acceptable (AOD4454 baseline is 20A)
Rds On (Max) @ 10V: Range 77–95 mOhm acceptable
Gate Threshold Voltage (Vgs(th)): Range 2.0–5.0V acceptable
Gate Charge (Qg): Range 11–45 nC acceptable
Input Capacitance (Ciss): Range 765–1165 pF acceptable
Power Dissipation (Tc): Minimum 56.8W acceptable (AOD4454 baseline is 100W)
Operating Temperature: Minimum -55°C to 150°C acceptable (AOD4454 baseline is -55°C to 175°C)
Gate Voltage (Vgs) Max: ±20V to ±30V acceptable

All substitute parts listed maintain ROHS3 compliance, Surface Mount TO-252 packaging, and Active product status.

Parameter Comparison

Parameter	AOD4454	AOD256	FDD770N15A	IRFR24N15DTRPBF	SUD15N15-95-E3	Unit
Manufacturer	Alpha & Omega	Alpha & Omega	onsemi	Infineon	Vishay Siliconix	—
Vdss	150	150	150	150	150	V
Id @ Tc	20	19	18	24	15	A
Rds On (Max) @ 10V	94	85	77	95	95	mOhm
Vgs(th) @ 250µA	4.6	2.8	4.0	5.0	2.0	V
Gate Charge (Qg) @ 10V	20	22	11	45	25	nC
Ciss @ 75V or 25V	985	1165	765	890	900	pF
Power Dissipation (Tc)	100	83	56.8	140	62	W
Operating Temperature Range	-55 to 175	-55 to 175	-55 to 150	-55 to 175	-55 to 175	°C
Package	TO-252 (DPAK)	TO-252 (DPAK)	TO-252AA (DPAK)	TO-252AA (DPAK)	TO-252AA (DPAK)	—
Vgs Max	±20	±20	±20	±30	±20	V
RoHS Status	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	—
Product Status	Active	Active	Active	Active	Active	—

Engineering Selection Recommendations

AOD256 (Alpha & Omega Semiconductor Inc.)

The AOD256 is a direct manufacturer-recommended substitute from Alpha & Omega Semiconductor Inc. It maintains identical Vdss (150V), package form factor (TO-252 DPAK), and operating temperature range (-55°C to 175°C). The continuous drain current at Tc is 19A, which is within acceptable tolerance of the AOD4454 baseline of 20A. Rds On performance is improved at 85 mOhm versus 94 mOhm. This part is suitable for applications where the 1A reduction in Tc current does not impact circuit performance. ROHS3 compliance and Active status are maintained.

FDD770N15A (onsemi PowerTrench®)

The FDD770N15A is qualified as a substitute with 150V Vdss and TO-252AA (DPAK) package compatibility. Continuous drain current at Tc is 18A, representing a 2A reduction from the AOD4454. Rds On is superior at 77 mOhm. Gate charge is significantly lower at 11 nC, which may reduce switching losses in certain applications. Operating temperature range is -55°C to 150°C, which is 25°C lower than the AOD4454 maximum. This part is suitable for applications operating within the -55°C to 150°C range. ROHS3 compliance and Active status are maintained.

IRFR24N15DTRPBF (Infineon HEXFET®)

The IRFR24N15DTRPBF is qualified as a substitute with 150V Vdss and TO-252AA (DPAK) package compatibility. Continuous drain current at Tc is 24A, exceeding the AOD4454 baseline by 4A. Rds On is comparable at 95 mOhm. Gate charge is elevated at 45 nC, which may increase switching losses. Maximum gate voltage is ±30V, providing additional margin over the AOD4454 specification of ±20V. Power dissipation capability is significantly higher at 140W. Operating temperature range matches the AOD4454 at -55°C to 175°C. This part is suitable for applications requiring higher current capacity or enhanced thermal performance. ROHS3 compliance and Active status are maintained.

SUD15N15-95-E3 (Vishay Siliconix TrenchFET®)

The SUD15N15-95-E3 is qualified as a substitute with 150V Vdss and TO-252AA (DPAK) package compatibility. Continuous drain current at Tc is 15A, representing a 5A reduction from the AOD4454. Rds On is comparable at 95 mOhm. Gate threshold voltage is lower at 2.0V minimum, which may affect switching characteristics in low-voltage gate drive circuits. Gate charge is 25 nC. Operating temperature range matches the AOD4454 at -55°C to 175°C. ROHS3 compliance and Active status are maintained. REACH Status is listed as Affected for this part, which may require additional compliance verification in certain supply chain applications.

Frequently Asked Questions (FAQ)

Q: Can the AOD256 be used as a direct replacement for the AOD4454?

A: The AOD256 is a manufacturer-recommended substitute from the same supplier (Alpha & Omega Semiconductor Inc.). Both devices share identical Vdss (150V), package type (TO-252 DPAK), and operating temperature range (-55°C to 175°C). The continuous drain current at Tc is 19A versus 20A for the AOD4454, a 1A difference. Substitution is valid provided the application circuit does not require the full 20A continuous current specification.

Q: What is the primary difference between the FDD770N15A and the AOD4454?

A: The FDD770N15A has a lower continuous drain current at Tc (18A versus 20A) and a reduced maximum operating temperature (150°C versus 175°C). However, it offers superior Rds On performance (77 mOhm versus 94 mOhm) and significantly lower gate charge (11 nC versus 20 nC). Substitution is appropriate for applications operating within the -55°C to 150°C temperature range where reduced switching losses are beneficial.

Q: Why does the IRFR24N15DTRPBF have higher gate charge than the AOD4454?

A: The IRFR24N15DTRPBF is rated for higher continuous drain current (24A versus 20A) and higher power dissipation (140W versus 100W). Higher gate charge (45 nC versus 20 nC) is a characteristic trade-off associated with increased current-handling capability in this device class. Gate drive circuits must be capable of supplying the additional charge within the required switching time.

Q: Are all substitute parts compatible with the same PCB layout as the AOD4454?

A: All substitute parts listed use the TO-252 (DPAK) or TO-252AA (DPAK) package form factor with identical pin configuration and lead spacing. PCB layout compatibility is maintained. However, thermal management considerations may differ due to variations in power dissipation ratings. Verify thermal design margins for applications operating at elevated ambient temperatures or high duty cycles.

Q: What is the significance of the REACH Status notation for the SUD15N15-95-E3?

A: The SUD15N15-95-E3 is listed with REACH Status as Affected, whereas other substitute parts are listed as REACH Unaffected. This indicates the part may contain substances of concern under REACH regulations. Supply chain and regulatory compliance verification is required before substitution in applications subject to REACH compliance mandates.

Q: Can the AOD4454 be substituted with the SUD15N15-95-E3 in high-current applications?

A: The SUD15N15-95-E3 has a lower continuous drain current rating at Tc (15A versus 20A). Substitution is not appropriate for applications requiring the full 20A continuous current specification. However, it is suitable for applications with maximum current requirements of 15A or less.

Q: What is the impact of different gate threshold voltages among the substitute parts?

A: Gate threshold voltage (Vgs(th)) determines the minimum gate voltage required to turn the device on. The AOD4454 has Vgs(th) of 4.6V, while substitutes range from 2.0V to 5.0V. Lower threshold voltages (SUD15N15-95-E3 at 2.0V, AOD256 at 2.8V) allow operation with lower gate drive voltages. Higher threshold voltages (IRFR24N15DTRPBF at 5.0V) require higher gate drive voltages. Gate drive circuit design must accommodate the specific threshold voltage of the selected device.

Q: Are all substitute parts suitable for the same operating temperature range as the AOD4454?

A: The AOD4454 operates from -55°C to 175°C. The FDD770N15A has a reduced maximum operating temperature of 150°C. All other substitutes (AOD256, IRFR24N15DTRPBF, SUD15N15-95-E3) support the full -55°C to 175°C range. Applications requiring operation above 150°C must exclude the FDD770N15A from consideration.

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