AON6554 Equivalent & Substitute Parts

Part Overview

The AON6554 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with 36A continuous drain current at 25°C (Ta) and 85A at case temperature (Tc). The device is housed in an 8-DFN (5x6) surface mount package and is designed for high-efficiency switching applications requiring low on-resistance performance.

The AON6554 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. The substitute parts listed maintain electrical compatibility within the specified parameter ranges while offering active product status and improved availability.

Key Parameters

Parameter	AON6554 Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current @ 25°C (Ta)	36	A
Continuous Drain Current @ Case Temp (Tc)	85	A
On-Resistance (Rds On) @ 20A, 10V	2.9	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.2	V
Gate Charge (Qg) @ 10V	65	nC
Input Capacitance (Ciss) @ 15V	3020	pF
Power Dissipation (Ta)	5.6	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 AON6554 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: Must support minimum 36A at 25°C (Ta)
On-Resistance (Rds On): Lower or equivalent values ensure thermal performance
Gate Threshold Voltage: Must fall within acceptable switching range
Operating Temperature Range: Must support -55°C to 150°C

Mechanical Compatibility Criteria:

Package Type: Surface mount 8-pin configurations (8-DFN, 8-VSONP, 8-SOP)
Package Footprint: 5x6mm or compatible dimensions
Mounting Type: Surface mount technology

Compliance Criteria:

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

The substitute parts listed below meet these criteria while offering active product status and improved supply availability compared to the obsolete AON6554.

Parameter Comparison

Parameter	AON6554	CSD17301Q5A	CSD17305Q5A	CSD17306Q5A	CSD17501Q5A	CSD17505Q5A	TPH3R203NL,L1Q	Unit
Manufacturer	Alpha & Omega	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Toshiba
Vdss	30	30	30	30	30	30	30	V
Id @ 25°C (Ta)	36	28	29	24	—	24	47	A
Id @ Case Temp (Tc)	85	100	100	100	100	100	47	A
Rds On (Max)	2.9 @ 20A, 10V	2.6 @ 25A, 8V	3.4 @ 30A, 8V	3.7 @ 22A, 8V	2.9 @ 25A, 10V	3.5 @ 20A, 10V	3.2 @ 23.5A, 10V	mOhm
Vgs(th) @ 250µA	2.2	1.55	1.6	1.6	1.8	1.8	2.3	V
Gate Charge (Qg)	65 @ 10V	25 @ 4.5V	18.3 @ 4.5V	15.3 @ 4.5V	17 @ 4.5V	13 @ 4.5V	21 @ 10V	nC
Ciss @ 15V	3020	3480	2600	2170	2630	1980	2100	pF
Power Dissipation (Ta)	5.6	3.2	3.1	3.2	3.2	3.2	1.6	W
Operating Temp Range	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	to 150	°C
Package	8-DFN (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	8-SOP (5x5)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: CSD17501Q5A (Texas Instruments)

The CSD17501Q5A is the closest electrical equivalent to the AON6554. It maintains the same 30V Vdss rating, achieves 100A at case temperature (exceeding the AON6554's 85A), and delivers identical on-resistance of 2.9mOhm at 10V drive voltage. The device is part of the active NexFET™ series with ROHS3 compliance and unlimited moisture sensitivity rating. The 8-VSONP (5x6) package is mechanically compatible with the original 8-DFN footprint for most PCB layouts.

Secondary Substitutes: CSD17305Q5A and CSD17505Q5A (Texas Instruments)

Both devices provide 30V Vdss and 100A at case temperature. The CSD17305Q5A delivers 29A at 25°C with 3.4mOhm on-resistance, while the CSD17505Q5A provides 24A at 25°C with 3.5mOhm on-resistance. These options are suitable for applications where the continuous drain current requirement at 25°C is lower than the AON6554's 36A specification. Both maintain active product status, ROHS3 compliance, and compatible 8-VSONP packaging.

Alternative Substitute: TPH3R203NL,L1Q (Toshiba)

The TPH3R203NL,L1Q is an N-Channel MOSFET rated for 30V Vdss with 47A continuous drain current at case temperature. The device features 3.2mOhm on-resistance at 10V drive voltage and operates across the full -55°C to 150°C temperature range. The 8-SOP Advance (5x5) package differs slightly in footprint dimensions but maintains surface mount compatibility. This device is active and RoHS compliant.

Selection Criteria:

For direct pin-compatible replacement: Select CSD17501Q5A
For lower continuous current applications: Select CSD17305Q5A or CSD17505Q5A
For alternative package footprint: Select TPH3R203NL,L1Q
All substitutes maintain: 30V Vdss rating, -55°C to 150°C operating range, surface mount technology, and regulatory compliance

Frequently Asked Questions (FAQ)

Q: Can the CSD17501Q5A directly replace the AON6554 without PCB modifications?

A: The CSD17501Q5A uses an 8-VSONP (5x6) package versus the AON6554's 8-DFN (5x6) package. Both packages share identical 5x6mm footprint dimensions and surface mount pin configurations. Pin-to-pin compatibility exists for standard switching applications. Verify PCB pad layout and thermal via placement with device datasheets to confirm compatibility for your specific design.

Q: What is the primary advantage of substituting the obsolete AON6554?

A: The substitute parts, particularly the Texas Instruments NexFET™ series (CSD17301Q5A, CSD17305Q5A, CSD17306Q5A, CSD17501Q5A, CSD17505Q5A), offer active product status with guaranteed long-term availability. These devices deliver improved thermal performance, lower gate charge, and reduced input capacitance compared to the AON6554, resulting in better switching efficiency and reduced power dissipation in most applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All Texas Instruments CSD series substitutes (CSD17301Q5A, CSD17305Q5A, CSD17306Q5A, CSD17501Q5A, CSD17505Q5A) are ROHS3 compliant. The Toshiba TPH3R203NL,L1Q is RoHS compliant. All devices maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which substitute part has the lowest on-resistance?

A: The CSD17301Q5A delivers the lowest on-resistance at 2.6mOhm measured at 25A and 8V gate-source voltage. The CSD17501Q5A matches the AON6554's on-resistance specification at 2.9mOhm (measured at 25A, 10V). Lower on-resistance reduces power dissipation and heat generation in switching applications.

Q: What is the difference between the CSD17305Q5A and CSD17505Q5A?

A: Both devices are rated for 30V Vdss and 100A at case temperature. The CSD17305Q5A provides 29A continuous drain current at 25°C with 3.4mOhm on-resistance. The CSD17505Q5A provides 24A at 25°C with 3.5mOhm on-resistance. The CSD17305Q5A is packaged in Tape & Reel (TR), while the CSD17505Q5A is available in Cut Tape (CT) & Digi-Reel®. Selection depends on continuous current requirements and packaging preferences.

Q: Is the TPH3R203NL,L1Q suitable for high-frequency switching applications?

A: The TPH3R203NL,L1Q features 21nC gate charge at 10V and 2100pF input capacitance, supporting high-frequency switching. However, the gate charge is higher than the Texas Instruments CSD series alternatives. For applications requiring minimal switching losses and gate drive power, the CSD17501Q5A or CSD17305Q5A are preferred due to lower gate charge specifications (17nC and 18.3nC respectively).

Q: Can I use CSD17306Q5A if my application requires only 24A continuous current?

A: Yes. The CSD17306Q5A is rated for 24A continuous drain current at 25°C and 100A at case temperature, making it suitable for applications with lower continuous current requirements. The device maintains 30V Vdss, operates across -55°C to 150°C, and is ROHS3 compliant. This option reduces cost while maintaining electrical compatibility for current-limited designs.

Q: What packaging options are available for the substitute parts?

A: Texas Instruments CSD series devices are available in Cut Tape (CT) & Digi-Reel® or Tape & Reel (TR) packaging. The Toshiba TPH3R203NL,L1Q is supplied in Tape & Reel (TR). All devices use surface mount technology with 8-pin configurations. Verify packaging availability with your supplier for production volume requirements.

Q: Are there thermal performance differences between the AON6554 and substitute parts?

A: Yes. The AON6554 is rated for 5.6W power dissipation at 25°C ambient. The Texas Instruments CSD series devices are rated for 3.2W or 3.1W at 25°C ambient, indicating improved thermal efficiency. The Toshiba TPH3R203NL,L1Q is rated for 1.6W at 25°C ambient. Lower power dissipation reduces thermal management requirements and improves overall system efficiency.

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