AOB462L N-Channel 60V MOSFET Equivalent & Substitute Parts

Part Overview

The AOB462L is an N-Channel 60V MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 7A continuous drain current (Ta) and 35A (Tc) in a surface mount TO-263 (D2PAK) package. The device operates across a temperature range of -55°C to 175°C and features a maximum drain-source voltage of 60V with an on-resistance of 17.7mOhm at 30A and 10V gate-source voltage.

The AOB462L is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this MOSFET topology.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain-Source Voltage (Vdss)	60	V
Continuous Drain Current (Id) @ 25°C	7A (Ta), 35A (Tc)	A
On-Resistance (Rds On) @ 30A, 10V	17.7	mOhm
Gate-Source Voltage (Vgs) Max	±20	V
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	36	nC
Input Capacitance (Ciss) @ 30V	2400	pF
Power Dissipation (Max)	2.1W (Ta), 100W (Tc)	W
Operating Temperature Range	-55 to 175	°C
Mounting Type	Surface Mount	—
Package	TO-263-3, D2PAK	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AOB462L is determined by the following critical parameters:

Electrical Compatibility Requirements:

Drain-Source Voltage (Vdss) must equal or exceed 60V
Continuous drain current (Id) must meet or exceed the application requirement (minimum 7A at Ta, 35A at Tc)
Gate-Source Voltage (Vgs) rating must accommodate the drive circuit (±20V nominal)
On-resistance (Rds On) characteristics must be compatible with thermal and power dissipation constraints
Gate threshold voltage (Vgs(th)) must fall within acceptable switching margins
Operating temperature range must span -55°C to 175°C minimum

Mechanical Compatibility Requirements:

Package must be TO-263 (D2PAK) or equivalent footprint
Surface mount configuration required
Moisture Sensitivity Level (MSL) of 1 (Unlimited) preferred for handling compatibility

Regulatory & Compliance Requirements:

REACH Unaffected status required
ECCN EAR99 classification required
HTSUS code 8541.29.0095 required

The substitute parts listed below satisfy all electrical, mechanical, and regulatory requirements for direct replacement in applications designed for the AOB462L.

Parameter Comparison

Parameter	AOB462L	FQB50N06TM	HUF76429S3ST	IRFS3806TRLPBF	IRFZ44NSTRLPBF	IRFZ48RSPBF	IRFZ48STRLPBF	STB55NF06LT4	STB55NF06T4	STB60NF06T4
Manufacturer	Alpha & Omega	onsemi	onsemi	Infineon	Infineon	Vishay	Vishay	STMicroelectronics	STMicroelectronics	STMicroelectronics
Vdss (V)	60	60	60	60	55	60	60	60	60	60
Id @ 25°C (A)	7 (Ta), 35 (Tc)	50 (Tc)	47 (Tc)	43 (Tc)	49 (Tc)	50 (Tc)	50 (Tc)	55 (Tc)	50 (Tc)	60 (Tc)
Rds On @ 10V (mOhm)	17.7 @ 30A	22 @ 25A	22 @ 47A	15.8 @ 25A	17.5 @ 25A	18 @ 43A	18 @ 43A	18 @ 27.5A	18 @ 27.5A	16 @ 30A
Vgs(th) @ 250µA (V)	4	4	3	4	4	4	4	4.7	4	4
Qg @ 10V (nC)	36	41	46	30	63	110	110	37	60	66
Ciss @ 25-30V (pF)	2400 @ 30V	1540 @ 25V	1480 @ 25V	1150 @ 50V	1470 @ 25V	2400 @ 25V	2400 @ 25V	1700 @ 25V	1300 @ 25V	1810 @ 25V
Power Dissipation (W)	2.1 (Ta), 100 (Tc)	3.75 (Ta), 120 (Tc)	110 (Tc)	71 (Tc)	3.8 (Ta), 94 (Tc)	190 (Tc)	3.7 (Ta), 190 (Tc)	95 (Tc)	110 (Tc)	110 (Tc)
Vgs Max (V)	±20	±25	±16	±20	±20	±20	±20	±16	±20	±20
Operating Temp Range (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-65 to 175
Package	TO-263, D2PAK	TO-263, D2PAK	TO-263, D2PAK	D2PAK	D2PAK	TO-263, D2PAK	TO-263, D2PAK	D2PAK	D2PAK	D2PAK
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Active Product Status, Full Compliance):

The following parts are recommended as primary substitutes due to active product status, ROHS3 compliance, and full regulatory alignment:

STB60NF06T4 (STMicroelectronics): Offers the highest continuous drain current (60A at Tc) with matching 60V Vdss rating and superior on-resistance (16mOhm @ 30A). Extended operating temperature range (-65°C to 175°C) provides additional thermal margin. STripFET™ II series technology. Active product status ensures long-term availability.

STB55NF06T4 (STMicroelectronics): Provides 50A continuous drain current with 60V Vdss and 18mOhm on-resistance. 110W power dissipation capability. STripFET™ II series. Active product status with ROHS3 compliance.

IRFS3806TRLPBF (Infineon): Delivers 43A continuous drain current with superior on-resistance (15.8mOhm @ 25A) and lowest gate charge (30nC @ 10V) among substitutes. HEXFET® series technology. Active product status with highest inventory availability (20,897 pcs).

IRFZ48STRLPBF (Vishay Siliconix): Rated for 50A continuous drain current at 60V with matching on-resistance characteristics (18mOhm @ 43A). Tape & Reel packaging. Active product status with ROHS3 compliance.

Secondary Substitutes (Obsolete or Marginal Parameters):

FQB50N06TM (onsemi): Obsolete product status limits long-term availability. Provides 50A continuous drain current and 60V Vdss with 22mOhm on-resistance. QFET® series.

HUF76429S3ST (onsemi): Active product status with UltraFET™ series technology. Rated for 47A continuous drain current. Lower gate threshold voltage (3V @ 250µA) requires drive circuit verification. Vgs Max rating of ±16V is lower than AOB462L specification.

IRFZ44NSTRLPBF (Infineon): Vdss rating of 55V is below the 60V specification of AOB462L. Suitable only for applications with maximum operating voltage below 55V. Active product status with ROHS3 compliance.

STB55NF06LT4 (STMicroelectronics): Rated for 55A continuous drain current with 60V Vdss. Vgs Max rating of ±16V is lower than AOB462L. Active product status with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can IRFZ44NSTRLPBF be used as a direct replacement for AOB462L?

A: IRFZ44NSTRLPBF has a Vdss rating of 55V, which is below the 60V specification of AOB462L. This part is suitable only for applications where the maximum drain-source voltage does not exceed 55V. For applications requiring the full 60V rating, use STB60NF06T4, STB55NF06T4, or IRFS3806TRLPBF instead.

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

A: Ta (ambient temperature) current rating is measured at 25°C ambient temperature without thermal management. Tc (case temperature) current rating is measured at 25°C case temperature and represents the maximum current the device can handle with proper thermal management and heat sinking. The AOB462L is rated for 7A (Ta) and 35A (Tc). Substitute parts with higher Tc ratings provide greater current capacity under identical thermal conditions.

Q: Are all substitute parts available in the same package?

A: All substitute parts use the TO-263 (D2PAK) package or equivalent D2PAK footprint, ensuring mechanical compatibility. The package pinout and thermal tab configuration are identical across all listed substitutes, allowing direct PCB replacement without layout modifications.

Q: Which substitute offers the lowest on-resistance?

A: IRFS3806TRLPBF offers the lowest on-resistance at 15.8mOhm @ 25A and 10V gate-source voltage. STB60NF06T4 provides 16mOhm @ 30A. Lower on-resistance reduces power dissipation and heat generation in switching applications.

Q: What is the significance of gate charge (Qg) in MOSFET selection?

A: Gate charge determines the energy required to switch the MOSFET on and off. Lower gate charge reduces switching losses and allows faster switching speeds. IRFS3806TRLPBF has the lowest gate charge at 30nC @ 10V, while IRFZ48RSPBF and IRFZ48STRLPBF have the highest at 110nC @ 10V. Selection depends on the gate driver capability and switching frequency requirements of the application.

Q: Why is product status important when selecting a substitute?

A: Active product status indicates ongoing manufacturing and long-term availability. Obsolete products like AOB462L and FQB50N06TM have limited remaining inventory and no future production. For new designs or long-term production, select active products such as STB60NF06T4, STB55NF06T4, IRFS3806TRLPBF, or IRFZ48STRLPBF to ensure supply chain continuity.

Q: What does ROHS3 compliance mean?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the device meets European environmental regulations restricting the use of hazardous materials including lead, cadmium, and mercury. All active substitute parts listed are ROHS3 compliant. The original AOB462L does not specify RoHS status.

Q: Can I use a substitute with higher continuous drain current than required?

A: Yes. A substitute with higher current rating (e.g., STB60NF06T4 at 60A instead of AOB462L at 35A) is electrically compatible and provides additional design margin. The device will operate within its safe operating area at lower current levels. Verify that gate drive voltage and on-resistance characteristics are compatible with the application circuit.

Q: What is the impact of input capacitance (Ciss) on circuit performance?

A: Input capacitance affects gate charge requirements and switching speed. Higher Ciss requires more gate charge to achieve the same switching speed. AOB462L and IRFZ48 series have 2400pF Ciss, while IRFS3806TRLPBF has 1150pF. Lower Ciss allows faster switching with reduced gate driver power consumption. Selection depends on gate driver specifications and switching frequency requirements.

Q: Are there any thermal considerations when substituting MOSFETs?

A: Yes. Power dissipation varies among substitutes. STB60NF06T4 and STB55NF06T4 are rated for 110W (Tc), while IRFZ48 series devices are rated for 190W (Tc). Higher power dissipation capability requires better thermal management. Verify that the PCB thermal design and heat sink capacity are adequate for the selected substitute's power dissipation characteristics.

Q: What does MSL 1 (Unlimited) mean for handling and storage?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture control. The device does not require special dry storage conditions or baking before soldering. All listed parts have MSL 1 rating, ensuring identical handling and storage requirements.

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