AON6508 N-Channel MOSFET 30V 29A/32A Equivalent & Substitute Parts

Part Overview

The AON6508 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with continuous drain current of 29A at Ta and 32A at Tc. The device is housed in an 8-DFN (5x6) surface mount package and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production and field replacements.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current @ 25°C (Ta)	29	A
Continuous Drain Current @ 25°C (Tc)	32	A
Rds On (Max) @ 20A, 10V	3.2	mOhm
Gate Charge (Qg) @ 10V	49	nC
Vgs(th) @ 250µA	2.2	V
Vgs (Max)	±20	V
Input Capacitance (Ciss) @ 15V	2010	pF
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package	8-DFN (5x6)	—
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AON6508 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Drain-to-source voltage (Vdss) must equal or exceed 30V
Continuous drain current (Id) must meet or exceed 29A at Ta or 32A at Tc
Gate-source voltage (Vgs) rating must accommodate ±20V operation
Operating temperature range must span -55°C to 150°C
On-state resistance (Rds On) should be comparable to enable equivalent power dissipation characteristics

Mechanical Compatibility Criteria:

Surface mount technology required
Package footprint compatibility with 8-pin configurations (8-DFN, 8-VSON, 8-TSON, or equivalent power packages)
Compliance with RoHS3 and MSL 1 standards

Substitute parts are grouped into two categories:

Direct Functional Equivalents: Parts meeting all electrical parameters within the same or compatible package families (8-DFN, 8-VSON, 8-TSON, 8-PowerTDFN)
Performance-Enhanced Alternatives: Parts exceeding the AON6508 specifications in current handling or thermal performance while maintaining voltage and temperature compatibility

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ Ta (A)	Id @ Tc (A)	Rds On @ 10V (mOhm)	Qg @ 10V (nC)	Vgs(th) (V)	Package	Status
AON6508	Alpha & Omega	30	29	32	3.2	49	2.2	8-DFN (5x6)	Obsolete
AON6354	Alpha & Omega	30	—	83	3.3	35	2.2	8-DFN (5x6)	Active
BSC0902NSIATMA1	Infineon	30	23	100	2.8	32	2.0	PG-TDSON-8-6	Active
BSC0904NSIATMA1	Infineon	30	20	78	3.7	17	2.0	PG-TDSON-8-6	Active
CSD17301Q5A	Texas Instruments	30	28	100	2.6	25	1.55	8-VSONP (5x6)	Active
CSD17305Q5A	Texas Instruments	30	29	100	3.4	18.3	1.6	8-VSONP (5x6)	Active
CSD17306Q5A	Texas Instruments	30	24	100	3.7	15.3	1.6	8-VSONP (5x6)	Active
CSD17501Q5A	Texas Instruments	30	—	100	2.9	17	1.8	8-VSONP (5x6)	Active
PJQ5424_R2_00001	Panjit International	30	13.5	100	3.8	24	2.5	DFN5060-8	Active
SIR818DP-T1-GE3	Vishay Siliconix	30	—	50	2.8	95	2.4	PowerPAK SO-8	Active
TPN2R703NL,L1Q	Toshiba	30	—	45	2.7	21	2.3	8-TSON (3.1x3.1)	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The CSD17305Q5A (Texas Instruments NexFET™) and CSD17301Q5A are the most direct functional equivalents. Both devices match the AON6508 in 30V Vdss rating and provide continuous drain current of 29A and 28A respectively at Ta, meeting or exceeding the original specification. Both are housed in 8-VSONP (5x6) packages, which are mechanically compatible with 8-DFN footprints in most PCB layouts. Both parts are active products with ROHS3 compliance and MSL 1 ratings, ensuring long-term availability and environmental compliance.

Secondary Substitutes (Performance Enhancement):

The AON6354 (Alpha & Omega) provides the same manufacturer continuity with identical 8-DFN (5x6) packaging and maintains the same gate threshold voltage (2.2V). This part delivers significantly higher current capacity (83A at Tc) while reducing gate charge (35 nC), making it suitable for applications requiring improved thermal performance.

The BSC0902NSIATMA1 (Infineon OptiMOS™) offers superior on-state resistance (2.8 mOhm) and lower gate charge (32 nC) compared to the AON6508, with 100A current capacity at Tc. The PG-TDSON-8-6 package is mechanically compatible with standard 8-pin power MOSFET footprints.

Package Considerations:

Designs using 8-DFN (5x6) footprints can directly accommodate the AON6354 without layout modification. Designs requiring alternative packages should verify PCB footprint compatibility before substitution. The 8-VSONP, 8-TSON, and PG-TDSON packages are all industry-standard 8-pin power packages with similar thermal and electrical characteristics but may require minor PCB layout adjustments.

Compliance and Availability:

All recommended substitutes are active products with ROHS3 compliance and MSL 1 ratings. Inventory availability is confirmed for all listed parts, with stock quantities ranging from 8,410 to 90,300 units across multiple distributors.

Frequently Asked Questions (FAQ)

Q: Can the CSD17305Q5A directly replace the AON6508 without PCB modification?

A: The CSD17305Q5A is electrically compatible with the AON6508 and matches the 29A continuous drain current specification at Ta. However, the package is 8-VSONP (5x6) rather than 8-DFN (5x6). While both are 8-pin power packages with identical pin counts and similar footprints, PCB layout verification is required to confirm mechanical compatibility with existing 8-DFN footprints.

Q: What is the primary advantage of the AON6354 over the AON6508?

A: The AON6354 maintains identical packaging (8-DFN 5x6) and gate threshold voltage (2.2V) as the AON6508 but provides significantly higher current capacity (83A at Tc versus 32A at Tc) and lower gate charge (35 nC versus 49 nC). This enables improved thermal performance and faster switching characteristics in the same package footprint.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant. The AON6508 is also ROHS3 compliant, ensuring environmental compliance consistency across all alternatives.

Q: What is the difference between Ta and Tc current ratings?

A: Ta represents continuous drain current at ambient temperature (typically 25°C), while Tc represents continuous drain current at case temperature (typically 25°C). Tc ratings are generally higher because they account for thermal management through the package case. Selection should be based on the thermal conditions of the specific application.

Q: Can the BSC0902NSIATMA1 be used in applications requiring exactly 29A continuous current?

A: Yes. The BSC0902NSIATMA1 is rated for 23A at Ta and 100A at Tc, which exceeds the AON6508 requirement of 29A at Ta. The part is suitable for applications requiring the specified current level. However, the lower gate threshold voltage (2.0V versus 2.2V) may require verification of gate drive circuit compatibility.

Q: What is the MSL rating and why is it important?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture bake-out requirements. All substitute parts carry MSL 1 ratings, matching the AON6508 specification. This ensures consistent handling and storage procedures across all alternatives.

Q: Are there package size differences between the substitute parts?

A: Yes. The AON6508 uses 8-DFN (5x6), while substitutes use 8-VSONP (5x6), 8-TSON (3.1x3.1), PG-TDSON-8-6, DFN5060-8, or PowerPAK SO-8 packages. All are 8-pin surface mount packages, but physical dimensions and thermal characteristics vary. PCB footprint compatibility must be verified before substitution.

Q: Which substitute offers the lowest on-state resistance?

A: The CSD17301Q5A offers the lowest on-state resistance at 2.6 mOhm (measured at 25A, 8V). This provides superior power efficiency and reduced heat generation compared to the AON6508 (3.2 mOhm at 20A, 10V).

Q: Is the TPN2R703NL,L1Q suitable for the same applications as the AON6508?

A: The TPN2R703NL,L1Q is rated for 45A at Tc and 30V Vdss, exceeding the AON6508 current specification. It is suitable for applications requiring the specified performance level. The 8-TSON package (3.1x3.1) is smaller than the 8-DFN (5x6), which may require PCB layout verification.

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