AON6504 N-Channel MOSFET 30V 51A/85A Equivalent & Substitute Parts

Part Overview

The AON6504 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with continuous drain current of 51A (Ta) and 85A (Tc). The device is housed in an 8-DFN (5x6) surface mount package and is designed for high-current switching applications requiring low on-resistance performance.

The AON6504 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Substitute devices must maintain electrical compatibility across critical parameters including voltage rating, current handling capability, on-resistance characteristics, and thermal performance while accommodating package variations.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current @ 25°C (Ta)	51	A
Continuous Drain Current @ 25°C (Tc)	85	A
On-Resistance (Rds On) @ 20A, 10V	1.8	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.2	V
Gate Charge (Qg) @ 10V	60	nC
Input Capacitance (Ciss) @ 15V	2719	pF
Power Dissipation (Ta)	7.3	W
Power Dissipation (Tc)	83	W
Operating Temperature Range	-55 to 150	°C
Package Type	8-DFN (5x6)	Surface Mount
Moisture Sensitivity Level	1 (Unlimited)	MSL

Substitute Part Grouping Explanation

Substitution of the AON6504 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
Continuous drain current must support the application's current requirements at both Ta and Tc conditions
On-resistance (Rds On) characteristics must be compatible with power dissipation and thermal management requirements
Gate threshold voltage (Vgs(th)) must fall within acceptable switching characteristics
Gate charge (Qg) and input capacitance (Ciss) affect switching speed and driver requirements

Mechanical Compatibility Criteria:

Surface mount package type must be compatible with PCB layout and assembly processes
Package footprint must accommodate the 5x6mm form factor or equivalent
Moisture sensitivity level must meet or exceed MSL 1 classification

Compliance Criteria:

RoHS3 compliance status
REACH compliance status
Operating temperature range must span -55°C to 150°C

All substitute parts listed maintain 30V Vdss rating, support continuous drain currents of 85A or greater at Tc, operate across the full -55°C to 150°C temperature range, and are classified as active products with current manufacturing status.

Parameter Comparison

Parameter	AON6504	AON6324	CSD17556Q5BT	IRFH5300TRPBF	IRFH5301TRPBF
Manufacturer	Alpha & Omega	Alpha & Omega	Texas Instruments	Infineon	Infineon
Vdss (V)	30	30	30	30	30
Id @ 25°C Ta (A)	51	—	100	40	35
Id @ 25°C Tc (A)	85	85	100	100	100
Rds On (mOhm) @ 10V	1.8 @ 20A	2.1 @ 20A	1.4 @ 40A	1.4 @ 50A	1.85 @ 50A
Vgs(th) (V)	2.2 @ 250µA	2.1 @ 250µA	1.65 @ 250µA	2.35 @ 150µA	2.35 @ 100µA
Qg (nC)	60 @ 10V	28 @ 4.5V	39 @ 4.5V	120 @ 10V	77 @ 10V
Ciss (pF) @ 15V	2719	2719	7020	7200	5114
Power Dissipation Tc (W)	83	83	191	250	110
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package Type	8-DFN (5x6)	8-DFN (5x6)	8-VSON-CLIP (5x6)	8-PQFN (5x6)	PQFN (5x6)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: AON6324

The AON6324 is the manufacturer-recommended direct substitute for the AON6504. Both devices are manufactured by Alpha & Omega Semiconductor Inc. and share identical 30V Vdss rating, 85A continuous drain current at Tc, and 8-DFN (5x6) package footprint. The AON6324 is classified as an active product with current manufacturing support and ROHS3 compliance. On-resistance is marginally higher (2.1mOhm vs. 1.8mOhm), and gate charge is significantly lower (28nC vs. 60nC), resulting in improved switching efficiency. This device is the preferred choice for direct replacement in existing designs.

Secondary Substitutes: CSD17556Q5BT, IRFH5300TRPBF, IRFH5301TRPBF

These devices provide electrical equivalence with enhanced performance characteristics. All three maintain 30V Vdss rating and support 85A or greater continuous drain current at Tc. All are active products with ROHS3 compliance and MSL 1 rating.

The CSD17556Q5BT (Texas Instruments NexFET™ series) offers superior on-resistance (1.4mOhm) and higher power dissipation capability (191W Tc), accommodating higher current applications. The 8-VSON-CLIP package is mechanically compatible with 5x6mm footprint requirements.

The IRFH5300TRPBF and IRFH5301TRPBF (Infineon HEXFET® series) provide 100A continuous drain current at Tc with on-resistance values of 1.4mOhm and 1.85mOhm respectively. Both utilize 8-PQFN packages compatible with 5x6mm footprints. Gate charge specifications differ (120nC and 77nC respectively), affecting driver circuit requirements.

Selection Basis:

All substitute parts maintain electrical compatibility across voltage, current, and temperature specifications
All substitute parts are active products with established supply chain availability
All substitute parts meet ROHS3 and REACH compliance requirements
Package variations (DFN, VSON-CLIP, PQFN) are mechanically compatible with 5x6mm footprints
Moisture sensitivity level 1 (Unlimited) is maintained across all options

Frequently Asked Questions (FAQ)

Q: Can the AON6324 be used as a direct replacement for the AON6504 without PCB modifications?

A: Yes. The AON6324 shares the identical 8-DFN (5x6) package footprint and pinout with the AON6504. No PCB layout changes are required. Both devices are manufactured by Alpha & Omega Semiconductor Inc. and maintain the same electrical interface characteristics.

Q: What is the primary difference between the AON6504 and AON6324?

A: The AON6324 is the active production equivalent of the obsolete AON6504. Both devices share 30V Vdss, 85A continuous drain current at Tc, and identical package specifications. The AON6324 features lower gate charge (28nC vs. 60nC) and marginally higher on-resistance (2.1mOhm vs. 1.8mOhm). The AON6324 is ROHS3 compliant and actively manufactured.

Q: Can I use the CSD17556Q5BT or Infineon devices if my PCB is designed for the 8-DFN package?

A: Package compatibility requires verification. While the CSD17556Q5BT (8-VSON-CLIP), IRFH5300TRPBF (8-PQFN), and IRFH5301TRPBF (PQFN) all maintain 5x6mm footprints, the pinout and pad layout may differ from the 8-DFN package. PCB layout review is necessary to confirm mechanical and electrical compatibility before substitution.

Q: How do gate charge differences affect circuit performance?

A: Gate charge (Qg) determines the charge required to switch the MOSFET on and off. The AON6504 requires 60nC at 10V, while the AON6324 requires only 28nC at 4.5V. Lower gate charge reduces driver circuit power consumption and enables faster switching transitions. The CSD17556Q5BT (39nC) and IRFH5301TRPBF (77nC) provide intermediate values. Driver circuit specifications must accommodate the selected device's gate charge requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The AON6324, CSD17556Q5BT, IRFH5300TRPBF, and IRFH5301TRPBF are all ROHS3 compliant. The original AON6504 does not specify RoHS status. All substitute parts are REACH compliant and classified as REACH Unaffected.

Q: What is the significance of the Ta versus Tc current ratings?

A: Ta (ambient temperature) and Tc (case temperature) represent different thermal measurement conditions. Ta ratings (51A for AON6504, 40A for IRFH5300TRPBF, 35A for IRFH5301TRPBF) reflect continuous current under ambient temperature conditions. Tc ratings (85A for AON6504 and AON6324, 100A for CSD17556Q5BT, IRFH5300TRPBF, and IRFH5301TRPBF) reflect continuous current under case temperature conditions with active thermal management. Application requirements determine which rating applies.

Q: Can I substitute based on on-resistance alone?

A: No. While on-resistance is critical for power dissipation calculations, substitution requires compatibility across multiple parameters: Vdss rating, continuous drain current, gate threshold voltage, gate charge, input capacitance, and operating temperature range. All parameters must meet or exceed application requirements. Package compatibility and compliance certifications must also be verified.

Q: What is the Moisture Sensitivity Level (MSL) rating, and why is it important?

A: MSL 1 (Unlimited) indicates the device can be stored indefinitely without moisture absorption concerns and does not require special handling or baking procedures prior to soldering. All listed substitute parts maintain MSL 1 rating, ensuring compatibility with standard manufacturing processes and storage conditions.

Q: How do input capacitance differences impact circuit design?

A: Input capacitance (Ciss) affects gate drive circuit design and switching speed. The AON6504 and AON6324 both specify 2719pF at 15V, while the CSD17556Q5BT (7020pF) and IRFH5300TRPBF (7200pF) have significantly higher capacitance values. Higher capacitance requires greater gate charge and may necessitate driver circuit adjustments to maintain switching performance. The IRFH5301TRPBF (5114pF) provides an intermediate value.

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