AON6435 Equivalent & Substitute Parts

Part Overview

The AON6435 is a P-Channel 30V MOSFET manufactured by Alpha & Omega Semiconductor Inc., designed for surface mount applications in the 8-DFN (5x6) package. This device delivers 12A continuous drain current at Ta and 34A at Tc, with a maximum on-resistance of 17mOhm at 20A and 10V gate-source voltage. The AON6435 is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of 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	—
Drain to Source Voltage (Vdss)	30	V
Current - Continuous Drain (Id) @ 25°C (Ta)	12	A
Current - Continuous Drain (Id) @ 25°C (Tc)	34	A
Rds On (Max) @ Id, Vgs	17	mOhm @ 20A, 10V
Vgs(th) (Max) @ Id	3	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	21	nC @ 10V
Vgs (Max)	±25	V
Input Capacitance (Ciss) (Max) @ Vds	1400	pF @ 15V
Power Dissipation (Max) (Ta)	4.1	W
Power Dissipation (Max) (Tc)	31	W
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package	8-DFN (5x6)	—
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AON6435 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Drain to Source Voltage (Vdss) must equal or exceed 30V
FET type must be P-Channel
Technology must be MOSFET (Metal Oxide)
Operating temperature range must encompass -55°C to 150°C
Gate-source voltage rating (Vgs Max) must support ±25V or higher

Mechanical Compatibility Criteria:

Mounting type must be Surface Mount
Package must be compatible with 8-pin DFN or equivalent power surface mount footprints
MSL rating must be 1 (Unlimited) or equivalent

Performance Substitution Logic: Substitute parts are acceptable when they maintain or improve upon the following performance characteristics:

Drain current (Id) at Ta and Tc ratings must support the application requirements
On-resistance (Rds On) must not exceed the original specification to prevent thermal degradation
Gate charge (Qg) and input capacitance (Ciss) should remain within acceptable ranges to preserve switching characteristics
Power dissipation capability must be sufficient for the intended thermal environment

All substitute parts listed below satisfy these criteria and are classified as Active products with current manufacturing status.

Parameter Comparison

Parameter	AON6435	AONS21321	DMP3008SFGQ-13	PJQ5411_R2_00001
Manufacturer	Alpha & Omega Semiconductor Inc.	Alpha & Omega Semiconductor Inc.	Diodes Incorporated	Panjit International Inc.
Product Status	Not For New Designs	Active	Active	Active
FET Type	P-Channel	P-Channel	P-Channel	P-Channel
Vdss	30V	30V	30V	30V
Id @ 25°C (Ta)	12A	14A	8.6A	10A
Id @ 25°C (Tc)	34A	24A	—	45A
Rds On (Max) @ Id, Vgs	17mOhm @ 20A, 10V	16.5mOhm @ 20A, 10V	17mOhm @ 10A, 10V	15.5mOhm @ 10A, 10V
Vgs(th) (Max) @ Id	3V @ 250µA	2.3V @ 250µA	2.1V @ 250µA	2.5V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	21nC @ 10V	34nC @ 10V	47nC @ 10V	14nC @ 4.5V
Vgs (Max)	±25V	±25V	±20V	±20V
Input Capacitance (Ciss) (Max) @ Vds	1400pF @ 15V	1180pF @ 15V	2230pF @ 15V	1556pF @ 15V
Power Dissipation (Max) (Ta)	4.1W	5W	900mW	2W
Power Dissipation (Max) (Tc)	31W	24.5W	—	40W
Operating Temperature	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package	8-DFN (5x6)	8-DFN (5x6)	PowerDI3333-8	DFN5060-8
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

AONS21321 (Alpha & Omega Semiconductor Inc.)

The AONS21321 is the primary recommended substitute for the AON6435. Both devices are manufactured by Alpha & Omega Semiconductor Inc. and share identical package geometry (8-DFN 5x6). The AONS21321 is classified as Active, ensuring long-term availability and manufacturing support. Electrical parameters are closely matched: Vdss is identical at 30V, drain current at Ta is improved to 14A, and on-resistance is marginally better at 16.5mOhm. The AONS21321 maintains full compliance with ROHS3 and carries MSL 1 rating. This substitute provides direct functional replacement with enhanced performance characteristics and superior product lifecycle status.

PJQ5411_R2_00001 (Panjit International Inc.)

The PJQ5411_R2_00001 is an alternative substitute offering superior thermal performance. This device delivers 10A at Ta and 45A at Tc, exceeding the AON6435's Tc rating of 34A. On-resistance is improved to 15.5mOhm at 10A and 10V. Gate charge is significantly reduced to 14nC at 4.5V, enabling faster switching characteristics. The package is DFN5060-8, which differs from the original 8-DFN (5x6) footprint and requires PCB layout verification. The PJQ5411_R2_00001 is Active and ROHS3 compliant. This substitute is suitable for applications requiring enhanced thermal dissipation and reduced switching losses, provided package compatibility is confirmed.

DMP3008SFGQ-13 (Diodes Incorporated)

The DMP3008SFGQ-13 is a secondary substitute option from Diodes Incorporated. This device is rated for 8.6A at Ta and 900mW power dissipation, representing reduced current capacity compared to the AON6435. On-resistance is maintained at 17mOhm at 10A and 10V. Input capacitance is elevated to 2230pF, which may impact switching speed in high-frequency applications. The package is PowerDI3333-8, differing from the original footprint and requiring PCB layout verification. The DMP3008SFGQ-13 is Active and ROHS3 compliant. This substitute is applicable only to applications with lower current requirements and where thermal constraints are less stringent.

Product Status Consideration:

All three substitute parts are classified as Active, ensuring continued manufacturing availability, technical support, and supply chain stability. The AON6435's "Not For New Designs" status necessitates migration to one of these alternatives for long-term production viability.

Frequently Asked Questions (FAQ)

Q: Can the AONS21321 be used as a direct drop-in replacement for the AON6435?

A: The AONS21321 shares the identical 8-DFN (5x6) package footprint with the AON6435, enabling direct PCB placement without layout modification. Electrical parameters are compatible, with improved drain current and on-resistance. No design changes are required for package compatibility.

Q: What are the package differences between the substitute parts?

A: The AONS21321 maintains the original 8-DFN (5x6) package. The PJQ5411_R2_00001 uses DFN5060-8 packaging, and the DMP3008SFGQ-13 uses PowerDI3333-8 packaging. Both alternative packages differ in footprint dimensions and pin configuration from the original. PCB layout verification is mandatory before implementation.

Q: Which substitute part offers the best thermal performance?

A: The PJQ5411_R2_00001 delivers the highest thermal capability with 45A continuous drain current at Tc and 40W power dissipation at Tc. This device is suitable for applications requiring maximum heat dissipation. The AONS21321 provides 24A at Tc with 24.5W dissipation, and the DMP3008SFGQ-13 is limited to 900mW at Ta.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The AONS21321, PJQ5411_R2_00001, and DMP3008SFGQ-13 are all ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching the environmental compliance profile of the AON6435.

Q: What is the significance of gate charge differences among the substitutes?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. The AON6435 requires 21nC at 10V. The AONS21321 requires 34nC, the DMP3008SFGQ-13 requires 47nC, and the PJQ5411_R2_00001 requires only 14nC at 4.5V. Lower gate charge enables faster switching and reduced driver power consumption. Higher gate charge may require driver circuit optimization.

Q: Can the DMP3008SFGQ-13 replace the AON6435 in high-current applications?

A: No. The DMP3008SFGQ-13 is rated for 8.6A at Ta, which is significantly lower than the AON6435's 12A at Ta. This substitute is suitable only for applications with reduced current requirements. For high-current applications, the AONS21321 or PJQ5411_R2_00001 are appropriate alternatives.

Q: What is the maximum gate-source voltage for each substitute?

A: The AONS21321 supports ±25V, matching the AON6435. The PJQ5411_R2_00001 and DMP3008SFGQ-13 both support ±20V. Applications requiring ±25V gate voltage must use the AONS21321 or AON6435.

Q: How do input capacitance values affect circuit performance?

A: Input capacitance (Ciss) affects gate drive requirements and switching speed. The AON6435 has 1400pF at 15V. The AONS21321 has 1180pF (lower, faster switching), the PJQ5411_R2_00001 has 1556pF (comparable), and the DMP3008SFGQ-13 has 2230pF (higher, slower switching). Applications with tight switching timing requirements should prioritize lower Ciss values.

Q: Is inventory availability a factor in substitute selection?

A: Yes. The AONS21321 has 68,546 pieces in stock, the PJQ5411_R2_00001 has 9,160 pieces, and the DMP3008SFGQ-13 has 9,374 pieces. The AONS21321 offers superior supply chain security for high-volume production requirements.

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