AOD403 MOSFET P-Channel 30V Equivalent & Substitute Parts

Part Overview

The AOD403 is a P-Channel enhancement mode MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with continuous drain current of 15A at Ta and 70A at Tc. The device is packaged in TO-252 (DPAK) surface mount configuration and is compliant with RoHS3 and REACH standards.

The AOD403 carries a product status designation of "Not For New Designs," indicating that this component is no longer recommended for new circuit development. Identifying equivalent and substitute parts is necessary to support existing designs, facilitate production continuity, and enable migration to active product alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current @ 25°C (Ta)	15	A
Continuous Drain Current @ 25°C (Tc)	70	A
On-Resistance (Rds On) @ 20A, 20V	6	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	3.5	V
Gate Charge (Qg) @ 10V	120	nC
Maximum Gate Voltage (Vgs)	±25	V
Input Capacitance (Ciss) @ 15V	5300	pF
Power Dissipation (Ta)	2.5	W
Power Dissipation (Tc)	90	W
Operating Temperature Range	-55 to 175	°C
Mounting Type	Surface Mount	—
Package	TO-252 (DPAK)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AOD403 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

FET Type: P-Channel topology must be maintained
Drain-to-Source Voltage (Vdss): Minimum 30V rating required
Continuous Drain Current: Minimum 15A at Ta or 70A at Tc to support existing circuit current requirements
On-Resistance (Rds On): Values within acceptable range to maintain circuit performance and thermal characteristics
Gate Threshold Voltage (Vgs(th)): Compatible gate drive voltage requirements
Maximum Gate Voltage (Vgs): Must accommodate ±25V gate signal levels
Operating Temperature Range: Must support -55°C to 175°C operational envelope

Mechanical Compatibility Criteria:

Package Type: TO-252 (DPAK) surface mount configuration
Pin Configuration: 2 Leads + Tab (SC-63)
Mounting Type: Surface mount compatibility with existing PCB layouts

Regulatory & Compliance Criteria:

RoHS3 Compliance: Required for environmental and regulatory adherence
Moisture Sensitivity Level: MSL 1 (Unlimited) preferred for handling and storage consistency
REACH Status: REACH Unaffected designation maintained

The substitute parts identified below satisfy these criteria and are classified as manufacturer-recommended alternatives.

Parameter Comparison

Parameter	AOD403	AOD21357	PJD70P03_L2_00001	Unit
Manufacturer	Alpha & Omega Semiconductor Inc.	Alpha & Omega Semiconductor Inc.	Panjit International Inc.	—
Product Status	Not For New Designs	Active	Active	—
FET Type	P-Channel	P-Channel	P-Channel	—
Vdss	30	30	30	V
Continuous Drain Current (Ta)	15	—	11	A
Continuous Drain Current (Tc)	70	70	70	A
Rds On (Max) @ 20A, 20V	6	—	—	mOhm
Rds On (Max) @ 20A, 10V	—	8	—	mOhm
Rds On (Max) @ 10A, 10V	—	—	8.5	mOhm
Vgs(th) @ 250µA	3.5	2.3	2.5	V
Gate Charge (Qg) @ 10V	120	70	—	nC
Gate Charge (Qg) @ 4.5V	—	—	27	nC
Vgs (Max)	±25	±25	±20	V
Ciss @ 15V	5300	2830	3228	pF
Power Dissipation (Ta)	2.5	—	2	W
Power Dissipation (Tc)	90	78	63	W
Operating Temperature Range	-55 to 175	-55 to 150	-55 to 150	°C
Package	TO-252 (DPAK)	TO-252 (DPAK)	TO-252 (DPAK)	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

AOD21357 (Alpha & Omega Semiconductor Inc.)

The AOD21357 is an active product from the same manufacturer as the AOD403. It maintains identical Vdss (30V) and Tc drain current (70A) ratings. The AOD21357 exhibits lower gate charge (70 nC vs. 120 nC) and reduced input capacitance (2830 pF vs. 5300 pF), resulting in improved switching performance and reduced gate drive power requirements. On-resistance is specified at 8 mOhm @ 20A, 10V, compared to 6 mOhm @ 20A, 20V for the AOD403. The AOD21357 operates across -55°C to 150°C, which is narrower than the AOD403 range (-55°C to 175°C) by 25°C at the upper limit. Both devices are RoHS3 compliant with MSL 1 rating. The AOD21357 is suitable for applications where the reduced upper temperature limit is acceptable and where lower gate charge is beneficial.

PJD70P03_L2_00001 (Panjit International Inc.)

The PJD70P03_L2_00001 is an active product from Panjit International Inc. It maintains identical Vdss (30V) and Tc drain current (70A) ratings. The continuous drain current at Ta is specified as 11A, which is lower than the AOD403 (15A). On-resistance is specified at 8.5 mOhm @ 10A, 10V. Gate threshold voltage is 2.5V @ 250µA, lower than the AOD403 (3.5V). Gate charge is specified as 27 nC @ 4.5V, significantly lower than the AOD403 (120 nC @ 10V). Maximum gate voltage is ±20V, which is lower than the AOD403 (±25V). The device operates across -55°C to 150°C. All regulatory certifications (RoHS3, MSL 1, REACH Unaffected) are maintained. The PJD70P03_L2_00001 is suitable for applications where the reduced Ta current rating and ±20V gate voltage limit are acceptable and where lower gate charge is advantageous.

Selection Basis:

Both substitute parts are active products with current manufacturer support and full RoHS3 compliance. The AOD21357 is recommended for designs requiring continued support from Alpha & Omega Semiconductor Inc. The PJD70P03_L2_00001 is recommended for designs where cross-manufacturer sourcing is acceptable and where the specified electrical characteristics align with circuit requirements. Thermal design considerations must account for the reduced upper operating temperature limit (150°C vs. 175°C) in both substitutes.

Frequently Asked Questions (FAQ)

Q: Can the AOD21357 directly replace the AOD403 in existing designs?

A: The AOD21357 is electrically and mechanically compatible with the AOD403 for most applications. Both devices share identical Vdss (30V) and Tc drain current (70A) ratings, TO-252 (DPAK) packaging, and RoHS3 compliance. The primary difference is the reduced upper operating temperature limit (150°C vs. 175°C). If the design operates within -55°C to 150°C, direct substitution is feasible. Designs requiring operation above 150°C require thermal re-evaluation.

Q: What are the key differences between the AOD403 and PJD70P03_L2_00001?

A: Both devices share identical Vdss (30V) and Tc drain current (70A) ratings and TO-252 (DPAK) packaging. The PJD70P03_L2_00001 has a lower continuous drain current at Ta (11A vs. 15A), lower gate threshold voltage (2.5V vs. 3.5V), significantly lower gate charge (27 nC @ 4.5V vs. 120 nC @ 10V), and a lower maximum gate voltage (±20V vs. ±25V). The operating temperature range is also reduced to -55°C to 150°C. These differences may affect gate drive circuit design and thermal performance.

Q: Are all substitute parts available in the same package configuration?

A: Yes. The AOD403, AOD21357, and PJD70P03_L2_00001 are all packaged in TO-252 (DPAK) surface mount configuration with 2 Leads + Tab (SC-63). PCB layout compatibility is maintained across all three devices.

Q: What is the significance of the "Not For New Designs" status of the AOD403?

A: This designation indicates that Alpha & Omega Semiconductor Inc. no longer recommends the AOD403 for new circuit development. Existing designs using the AOD403 should consider migration to the AOD21357 (active product from the same manufacturer) to ensure long-term supply chain stability and continued manufacturer support.

Q: How do gate charge differences affect circuit design?

A: Gate charge (Qg) determines the amount of charge required to switch the MOSFET on or off. The AOD403 specifies 120 nC @ 10V, while the AOD21357 specifies 70 nC @ 10V and the PJD70P03_L2_00001 specifies 27 nC @ 4.5V. Lower gate charge reduces gate drive power dissipation and enables faster switching transitions. If substituting to a device with lower gate charge, gate drive circuit performance may improve. If substituting to a device with higher gate charge, gate drive capability must be verified.

Q: Are there any compliance or regulatory differences between the substitute parts?

A: All three devices (AOD403, AOD21357, and PJD70P03_L2_00001) are RoHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are REACH Unaffected. No compliance or regulatory differences exist between the devices.

Q: What should be considered when selecting between AOD21357 and PJD70P03_L2_00001?

A: The AOD21357 is from the same manufacturer as the AOD403 (Alpha & Omega Semiconductor Inc.) and maintains manufacturer continuity. The PJD70P03_L2_00001 is from Panjit International Inc. and introduces a secondary source. The AOD21357 has a higher Ta current rating (not specified vs. 11A) and supports ±25V gate voltage. The PJD70P03_L2_00001 has significantly lower gate charge (27 nC vs. 70 nC) and lower gate threshold voltage (2.5V vs. 2.3V). Selection depends on supply chain strategy, gate drive circuit design, and thermal requirements.

Q: Can the AOD403 be used in new designs?

A: The AOD403 carries a "Not For New Designs" status. New designs should utilize the AOD21357 or PJD70P03_L2_00001, both of which are active products with current manufacturer support.

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