AON6502 N-Channel MOSFET 30V 49A/85A Equivalent & Substitute Parts

Part Overview

The AON6502 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with continuous drain current of 49A (Ta) and 85A (Tc). The device is housed in an 8-DFN (5x6) surface mount package and is designed for power switching applications requiring efficient gate drive characteristics and low on-resistance performance.

The AON6502 carries a product status of "Not For New Designs," indicating that Alpha & Omega Semiconductor Inc. has discontinued active development and support for this part number. This status necessitates identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility while offering active product support and improved availability.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current @ 25°C (Ta)	49	A
Continuous Drain Current @ 25°C (Tc)	85	A
On-Resistance (Rds On) @ 20A, 10V	2.2	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2	V
Gate Charge (Qg) @ 10V	64	nC
Input Capacitance (Ciss) @ 15V	3430	pF
Power Dissipation (Ta)	7.4	W
Power Dissipation (Tc)	83	W
Operating Temperature Range	-55 to 150	°C
Package Type	8-DFN (5x6)	Surface Mount
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AON6502 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Drain-to-Source Voltage (Vdss): Must equal 30V
Continuous Drain Current: Must support minimum 49A (Ta) or 85A (Tc) rating
On-Resistance (Rds On): Must not exceed 2.2mOhm @ specified test conditions
Gate Threshold Voltage: Must fall within ±20V maximum gate voltage specification
Gate Charge and Input Capacitance: Must remain within acceptable switching performance envelope
Operating Temperature Range: Must support -55°C to 150°C minimum

Mechanical Equivalence Criteria:

Mounting Type: Surface Mount only
Package Footprint: 5x6mm form factor (DFN, PQFN, TSON, or WPAK variants acceptable)
Lead Configuration: Flat leads compatible with standard PCB assembly processes

Compliance Equivalence Criteria:

RoHS3 Compliance: Required
Moisture Sensitivity Level: MSL 1 (Unlimited) preferred
REACH Status: REACH Unaffected or compliant

Substitute parts listed below meet all electrical parameters within acceptable tolerance ranges and maintain mechanical compatibility through equivalent surface mount packaging. Package variants (DFN, PQFN, TSON, WPAK) are functionally interchangeable when footprint dimensions remain 5x6mm or smaller.

Parameter Comparison

Parameter	AON6502	AON6312	FDMS0306AS	RJK0346DPA-01#J0B	TPN2R203NC,L1Q
Manufacturer	Alpha & Omega	Alpha & Omega	onsemi	Renesas	Toshiba
Vdss (V)	30	30	30	30	30
Id @ 25°C Ta (A)	49	—	26	65	—
Id @ 25°C Tc (A)	85	85	49	—	45
Rds On @ 10V (mOhm)	2.2 @ 20A	1.85 @ 20A	2.4 @ 26A	1.8 @ 25A	2.2 @ 22.5A
Vgs(th) @ 250µA (V)	2	2.2	3 @ 1mA	—	2.3 @ 500µA
Gate Charge @ 10V (nC)	64	65	57	49	34
Ciss @ 15V (pF)	3430	3100	3550	7650 @ 10V	2230
Power Dissipation Tc (W)	83	50	59	65	42
Operating Temp Range (°C)	-55 to 150	-55 to 150	-55 to 150	150 (max)	150 (max)
Package Type	8-DFN (5x6)	8-DFN (5x6)	8-PQFN (5x6)	8-WPAK	8-TSON (3.1x3.1)
Product Status	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: AON6312

The AON6312 is the recommended direct substitute for the AON6502. Both devices are manufactured by Alpha & Omega Semiconductor Inc. and share identical electrical specifications for voltage rating (30V Vdss) and continuous drain current (85A Tc). The AON6312 features improved on-resistance performance (1.85mOhm versus 2.2mOhm) and maintains the same 8-DFN (5x6) package footprint, enabling direct PCB layout compatibility without redesign. The AON6312 carries Active product status with significantly higher inventory availability (19,352 units in stock versus 3,189 for the AON6502), ensuring long-term supply chain reliability. Both parts maintain ROHS3 compliance and MSL 1 rating.

Secondary Substitute: RJK0346DPA-01#J0B

The RJK0346DPA-01#J0B, manufactured by Renesas Electronics Corporation, provides electrical equivalence with superior on-resistance performance (1.8mOhm @ 25A, 10V). This device supports 65A continuous drain current (Ta) and 65W power dissipation (Tc), exceeding the AON6502 current rating. The 8-WPAK package maintains the 5x6mm form factor but differs in lead configuration and thermal characteristics. This substitute is suitable for applications where improved thermal performance and lower conduction losses justify package transition validation. Active product status and ROHS3 compliance are confirmed.

Tertiary Substitute: TPN2R203NC,L1Q

The TPN2R203NC,L1Q, manufactured by Toshiba Semiconductor and Storage, offers electrical compatibility with 45A continuous drain current (Tc) and 2.2mOhm on-resistance matching the AON6502 specification. The 8-TSON Advance package (3.1x3.1mm) provides a smaller footprint than the original 5x6mm DFN, requiring PCB layout modification. Gate charge is significantly lower (34nC versus 64nC), resulting in faster switching characteristics. This substitute is appropriate for space-constrained applications where reduced package size and improved switching speed provide design benefits. Active product status and RoHS compliance are confirmed.

Alternative Substitute: FDMS0306AS

The FDMS0306AS, manufactured by onsemi, provides electrical compatibility with 49A continuous drain current (Tc) and 2.4mOhm on-resistance. The 8-PQFN (5x6) package maintains identical footprint dimensions to the AON6502, enabling direct PCB compatibility. This device incorporates PowerTrench® and SyncFET™ technology series features. The FDMS0306AS is suitable for applications where onsemi supply chain integration or specific technology features provide procurement advantages. Active product status and ROHS3 compliance are confirmed.

Frequently Asked Questions (FAQ)

Q: Can the AON6312 be used as a direct replacement for the AON6502 without PCB modification?

A: Yes. The AON6312 shares identical package dimensions (8-DFN 5x6mm) and pinout with the AON6502. Both devices are manufactured by Alpha & Omega Semiconductor Inc. and maintain the same electrical interface specifications. No PCB layout changes are required for substitution.

Q: What is the primary reason for substituting the AON6502?

A: The AON6502 carries a "Not For New Designs" product status, indicating discontinued active development and support from the manufacturer. Substitution ensures access to actively supported components with improved long-term availability and supply chain reliability.

Q: Are all substitute parts compatible with the same PCB footprint as the AON6502?

A: The AON6312 and FDMS0306AS maintain the 5x6mm footprint and are directly compatible. The RJK0346DPA-01#J0B uses an 8-WPAK package with different lead configuration, requiring footprint validation. The TPN2R203NC,L1Q uses a smaller 3.1x3.1mm 8-TSON package, necessitating PCB redesign.

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

A: The RJK0346DPA-01#J0B provides the lowest on-resistance at 1.8mOhm @ 25A, 10V, followed by the AON6312 at 1.85mOhm @ 20A, 10V. Lower on-resistance reduces conduction losses and heat generation in power switching applications.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. All substitute parts listed (AON6312, FDMS0306AS, RJK0346DPA-01#J0B, TPN2R203NC,L1Q) maintain RoHS3 or RoHS compliance certification. The AON6502 is also ROHS3 compliant.

Q: What is the significance of gate charge (Qg) differences between substitute parts?

A: Gate charge determines the energy required to switch the MOSFET on and off. Lower gate charge (TPN2R203NC,L1Q at 34nC) results in faster switching speed and reduced gate driver power consumption. Higher gate charge (RJK0346DPA-01#J0B at 49nC) may require more robust gate drive circuitry but provides improved noise immunity.

Q: Can the FDMS0306AS be substituted if the application requires 85A continuous current?

A: The FDMS0306AS is rated for 49A continuous drain current (Tc), which matches the AON6502 Ta rating but falls short of the 85A Tc specification. This substitute is suitable only for applications requiring maximum 49A continuous current. The AON6312 or RJK0346DPA-01#J0B are required for 85A or higher current applications.

Q: What thermal considerations apply when substituting the TPN2R203NC,L1Q?

A: The TPN2R203NC,L1Q is rated for 42W power dissipation (Tc), compared to 83W for the AON6502. Applications requiring sustained power dissipation above 42W must use alternative substitutes (AON6312 at 50W, FDMS0306AS at 59W, or RJK0346DPA-01#J0B at 65W) or implement enhanced thermal management.

Q: Are moisture sensitivity levels equivalent across all substitute parts?

A: Yes. All substitute parts maintain MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage, handling, or assembly processes. This specification is equivalent to the AON6502.

Q: Which substitute provides the best overall compatibility with the AON6502?

A: The AON6312 provides the highest compatibility, offering identical package dimensions, pinout, electrical specifications, and manufacturer origin. This substitute requires no design validation and enables direct component interchange.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message